Maintenance update

`cargo update` to update Cargo.lock for backend and frontend Rust
projects.

README.md

@@ -0,0 +1,45 @@
+# Four-Line Dropper: A project developed via Agile methodologies
+
+Note that this project was made for a course for the JHU Engineering for
+Professionals program.
+
+The directory `front_end` holds a Rust project for the "front\_end" code. Or in
+other words, it holds the client-side code for the project. The MVP (Minimum
+Viable Product) started with just the front\_end, and if all the goals are met,
+then the "front\_end" may connect to a "back\_end" for networked gameplay.
+
+The directory `back_end` holds a Rust project for the "back\_end" code. It holds
+the server-side code for the project. It is mainly used to handle "Networked
+Multiplayer" mode for the game.
+
+The directory `specifications` holds defined specifications. It currently holds
+the back-end specifications (database and protocol).
+
+The directory `spreadsheets` hold LibreOffice Calc documents that are
+spreadsheets organizing the work. There is a document for User Stories, a
+document for the Product Backlogs, and there will be a document for each Sprint.
+
+The directory `retrospectives` holds the retrospectives of Sprints 3 and onward.
+
+The directory `plans` contains the release plans.
+
+The directory `pictures` holds pertinent images to the project. It includes the
+"Simple Model" of the project.
+
+## Tags
+
+The git repository is tagged per Sprint and per Day. [One can visualize the
+progress here.](https://git.seodisparate.com/stephenseo/EN605.607.81.SP22_ASDM_Project/graph)
+
+## What is Four-Line Dropper?
+
+Four-Line Dropper is a game where two players take turns dropping tokens into
+a board. Making a line of four tokens long horizontally, vertically, or
+diagonally is the win condition of the game. If the board fills up with no
+four-line matches, then the game ends in a draw. The game is called "Four-Line
+Dropper" to avoid clashing with the game's original name that is trademarked
+(this game is a clone of an existing game).
+
+# Link to a hosted instance
+
+[I have hosted an instance of the front-end/back-end here.](https://asdm.seodisparate.com)

back_end/.gitignore

@@ -0,0 +1,3 @@
+/target
+fourLineDropper.db
+.dump

back_end/COPYING

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
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+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

back_end/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "four_line_dropper_backend"
+version = "0.1.1"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tokio = { version = "1", features = ["full"] }
+warp = "0.3"
+serde_json = "1.0"
+bytes = "1.1"
+rusqlite = "0.27.0"
+rand = "0.8.4"
+futures = "0.3"
+oorandom = "11.1.3"
+serde = { version = "1.0", features = ["derive"] }
+serde_derive = "1.0"

back_end/README.md

@@ -0,0 +1,10 @@
+# How to run
+
+Just invoke `cargo run --release` to start the server locally. It expects to
+have sqlite already installed on your system. Note that the server listens on
+port 1237.
+
+# Other Notes
+
+See [choose-a-license](https://choosealicense.com/licenses/gpl-3.0) for details
+about the software license used.

back_end/notes.md

@@ -0,0 +1,5 @@
+Use something like:
+
+    curl -X POST 127.0.0.1:1237 -H 'Content-Type: application/json' -d '{"type": "pairing_request"}'
+
+To debug the backend. See protocol specifications for what should work.

back_end/src/ai.rs

@@ -0,0 +1 @@
+../../front_end/src/ai.rs

back_end/src/constants.rs

@@ -0,0 +1 @@
+../../front_end/src/constants.rs

back_end/src/game_logic.rs

@@ -0,0 +1 @@
+../../front_end/src/game_logic.rs

back_end/src/json_handlers.rs

@@ -0,0 +1,352 @@
+//Four Line Dropper Backend - A server enabling networked multiplayer for Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+use crate::{
+    constants::BACKEND_PHRASE_MAX_LENGTH,
+    db_handler::{CheckPairingType, DBHandlerRequest, GetIDSenderType},
+    state::EmoteEnum,
+};
+
+use std::{
+    sync::mpsc::{sync_channel, SyncSender},
+    time::Duration,
+};
+
+use serde_json::Value;
+
+const DB_REQUEST_TIMEOUT: Duration = Duration::from_secs(5);
+
+pub fn handle_json(
+    root: Value,
+    tx: SyncSender<DBHandlerRequest>,
+    _shutdown_tx: SyncSender<()>, // maybe used here, not sure if it will be
+) -> Result<String, String> {
+    if let Some(Value::String(type_str)) = root.get("type") {
+        match type_str.as_str() {
+            "pairing_request" => handle_pairing_request(root, tx),
+            "check_pairing" => handle_check_pairing(root, tx),
+            "place_token" => handle_place_token(root, tx),
+            "disconnect" => handle_disconnect(root, tx),
+            "game_state" => handle_game_state(root, tx),
+            "send_emote" => handle_send_emote(root, tx),
+            _ => Err("{\"type\":\"invalid_type\"}".into()),
+        }
+    } else {
+        Err("{\"type\":\"invalid_json\"}".into())
+    }
+}
+
+fn handle_pairing_request(root: Value, tx: SyncSender<DBHandlerRequest>) -> Result<String, String> {
+    let (player_tx, player_rx) = sync_channel::<GetIDSenderType>(1);
+    let mut phrase: Option<String> = None;
+    if let Some(phrase_text) = root.get("phrase") {
+        if let Some(mut phrase_str) = phrase_text.as_str() {
+            if !phrase_str.is_empty() {
+                if phrase_str.len() > BACKEND_PHRASE_MAX_LENGTH {
+                    let mut idx = BACKEND_PHRASE_MAX_LENGTH;
+                    while idx > 0 && !phrase_str.is_char_boundary(idx) {
+                        idx -= 1;
+                    }
+                    if idx == 0 {
+                        phrase_str = "";
+                    } else {
+                        phrase_str = phrase_str.split_at(idx).0;
+                    }
+                }
+
+                if !phrase_str.is_empty() {
+                    phrase = Some(phrase_str.to_owned());
+                }
+            }
+        }
+    }
+    if tx
+        .send(DBHandlerRequest::GetID {
+            response_sender: player_tx,
+            phrase,
+        })
+        .is_err()
+    {
+        return Err("{\"type\":\"pairing_response\", \"status\":\"internal_error\"}".into());
+    }
+    if let Ok((pid_opt, is_cyan_opt)) = player_rx.recv_timeout(DB_REQUEST_TIMEOUT) {
+        if pid_opt.is_none() {
+            return Ok("{\"type\":\"pairing_response\", \"status\":\"too_many_players\"}".into());
+        }
+        let pid = pid_opt.unwrap();
+        if let Some(is_cyan) = is_cyan_opt {
+            Ok(format!(
+                "{{\"type\":\"pairing_response\", \"id\": {}, \"status\": \"paired\", \"color\": \"{}\"}}",
+                pid,
+                if is_cyan { "cyan" } else { "magenta" }
+            ))
+        } else {
+            Ok(format!(
+                "{{\"type\":\"pairing_response\", \"id\": {}, \"status\": \"waiting\"}}",
+                pid
+            ))
+        }
+    } else {
+        Err("{\"type\":\"pairing_response\", \"status\":\"internal_error_timeout\"}".into())
+    }
+}
+
+fn handle_check_pairing(root: Value, tx: SyncSender<DBHandlerRequest>) -> Result<String, String> {
+    let id_option = root.get("id");
+    if id_option.is_none() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let player_id = id_option
+        .unwrap()
+        .as_u64()
+        .ok_or_else(|| String::from("{\"type\":\"invalid_syntax\"}"))?;
+    let player_id: u32 = player_id
+        .try_into()
+        .map_err(|_| String::from("{\"type\":\"invalid_syntax\"}"))?;
+    let (request_tx, request_rx) = sync_channel::<CheckPairingType>(1);
+    if tx
+        .send(DBHandlerRequest::CheckPairing {
+            id: player_id,
+            response_sender: request_tx,
+        })
+        .is_err()
+    {
+        return Err("{\"type\":\"pairing_status\", \"status\":\"internal_error\"}".into());
+    }
+    if let Ok((exists, is_paired, is_cyan)) = request_rx.recv_timeout(DB_REQUEST_TIMEOUT) {
+        if !exists {
+            Err("{\"type\":\"pairing_status\", \"status\":\"unknown_id\"}".into())
+        } else if is_paired {
+            Ok(format!(
+                "{{\"type\":\"pairing_status\", \"status\":\"paired\", \"color\":\"{}\"}}",
+                if is_cyan { "cyan" } else { "magenta" }
+            ))
+        } else {
+            Ok("{\"type\":\"pairing_status\", \"status\":\"waiting\"}".into())
+        }
+    } else {
+        Err("{\"type\":\"pairing_status\", \"status\":\"internal_error_timeout\"}".into())
+    }
+}
+
+fn handle_place_token(root: Value, tx: SyncSender<DBHandlerRequest>) -> Result<String, String> {
+    let id_option = root.get("id");
+    if id_option.is_none() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let player_id = id_option
+        .unwrap()
+        .as_u64()
+        .ok_or_else(|| String::from("{\"type\":\"invalid_syntax\"}"))?;
+    let player_id: u32 = player_id
+        .try_into()
+        .map_err(|_| String::from("{\"type\":\"invalid_syntax\"}"))?;
+
+    let position_option = root.get("position");
+    if position_option.is_none() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let position = position_option
+        .unwrap()
+        .as_u64()
+        .ok_or_else(|| String::from("{\"type\":\"invalid_syntax\"}"))?;
+    let position: usize = position
+        .try_into()
+        .map_err(|_| String::from("{\"type\":\"invalid_syntax\"}"))?;
+
+    let (resp_tx, resp_rx) = sync_channel(1);
+
+    if tx
+        .send(DBHandlerRequest::PlaceToken {
+            id: player_id,
+            pos: position,
+            response_sender: resp_tx,
+        })
+        .is_err()
+    {
+        return Err(String::from(
+            "{\"type\":\"place_token\", \"status\":\"internal_error\"}",
+        ));
+    }
+
+    let place_result = resp_rx.recv_timeout(DB_REQUEST_TIMEOUT);
+    if let Ok(Ok((place_status, board_opt))) = place_result {
+        if let Some(board_string) = board_opt {
+            Ok(format!(
+                "{{\"type\":\"place_token\", \"status\":\"{}\", \"board\":\"{}\"}}",
+                place_status, board_string
+            ))
+        } else {
+            Ok(format!(
+                "{{\"type\":\"place_token\", \"status\":\"{}\"}}",
+                place_status
+            ))
+        }
+    } else if let Ok(Err(place_error)) = place_result {
+        Err(format!(
+            "{{\"type\":\"place_token\", \"status\":\"{}\"}}",
+            place_error
+        ))
+    } else {
+        Err(String::from(
+            "{\"type\":\"place_token\", \"status\":\"internal_error\"}",
+        ))
+    }
+}
+
+fn handle_disconnect(root: Value, tx: SyncSender<DBHandlerRequest>) -> Result<String, String> {
+    let id_option = root.get("id");
+    if id_option.is_none() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let player_id = id_option
+        .unwrap()
+        .as_u64()
+        .ok_or_else(|| String::from("{\"type\":\"invalid_syntax\"}"))?;
+    let player_id: u32 = player_id
+        .try_into()
+        .map_err(|_| String::from("{\"type\":\"invalid_syntax\"}"))?;
+
+    let (resp_tx, resp_rx) = sync_channel(1);
+
+    if tx
+        .send(DBHandlerRequest::DisconnectID {
+            id: player_id,
+            response_sender: resp_tx,
+        })
+        .is_err()
+    {
+        return Err(String::from(
+            "{\"type\":\"disconnect\", \"status\":\"internal_error\"}",
+        ));
+    }
+
+    if let Ok(was_removed) = resp_rx.recv_timeout(DB_REQUEST_TIMEOUT) {
+        if was_removed {
+            Ok(String::from("{\"type\":\"disconnect\", \"status\":\"ok\"}"))
+        } else {
+            Ok(String::from(
+                "{\"type\":\"disconnect\", \"status\":\"unknown_id\"}",
+            ))
+        }
+    } else {
+        Err(String::from(
+            "{\"type\":\"disconnect\", \"status\":\"internal_error\"}",
+        ))
+    }
+}
+
+fn handle_game_state(root: Value, tx: SyncSender<DBHandlerRequest>) -> Result<String, String> {
+    let id_option = root.get("id");
+    if id_option.is_none() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let player_id = id_option
+        .unwrap()
+        .as_u64()
+        .ok_or_else(|| String::from("{\"type\":\"invalid_syntax\"}"))?;
+    let player_id: u32 = player_id
+        .try_into()
+        .map_err(|_| String::from("{\"type\":\"invalid_syntax\"}"))?;
+
+    let (resp_tx, resp_rx) = sync_channel(1);
+
+    if tx
+        .send(DBHandlerRequest::GetGameState {
+            id: player_id,
+            response_sender: resp_tx,
+        })
+        .is_err()
+    {
+        return Err("{\"type\":\"game_state\", \"status\":\"internal_error\"}".into());
+    }
+
+    if let Ok((db_game_state, board_string_opt, updated_time_opt, received_emote_opt)) =
+        resp_rx.recv_timeout(DB_REQUEST_TIMEOUT)
+    {
+        if let Some(board_string) = board_string_opt {
+            let updated_time = if let Some(time_string) = updated_time_opt {
+                time_string
+            } else {
+                return Err("{\"type\":\"game_state\", \"status\":\"internal_error\"}".into());
+            };
+
+            if let Some(emote) = received_emote_opt {
+                Ok(format!(
+                    "{{\"type\":\"game_state\", \"status\":\"{}\", \"board\":\"{}\", \"peer_emote\": \"{}\", \"updated_time\": \"{}\"}}",
+                    db_game_state, board_string, emote, updated_time
+                ))
+            } else {
+                Ok(format!(
+                    "{{\"type\":\"game_state\", \"status\":\"{}\", \"board\":\"{}\", \"updated_time\": \"{}\"}}",
+                    db_game_state, board_string, updated_time
+                ))
+            }
+        } else {
+            Ok(format!(
+                "{{\"type\":\"game_state\", \"status\":\"{}\"}}",
+                db_game_state
+            ))
+        }
+    } else {
+        Err("{\"type\":\"game_state\", \"status\":\"internal_error_timeout\"}".into())
+    }
+}
+
+fn handle_send_emote(root: Value, tx: SyncSender<DBHandlerRequest>) -> Result<String, String> {
+    let id_option = root.get("id");
+    if id_option.is_none() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let player_id = id_option
+        .unwrap()
+        .as_u64()
+        .ok_or_else(|| String::from("{\"type\":\"invalid_syntax\"}"))?;
+    let player_id: u32 = player_id
+        .try_into()
+        .map_err(|_| String::from("{\"type\":\"invalid_syntax\"}"))?;
+
+    let emote_type_option = root.get("emote");
+    if emote_type_option.is_none() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let emote_type_option = emote_type_option.unwrap().as_str();
+    if emote_type_option.is_none() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let emote_type = emote_type_option.unwrap();
+
+    let emote_enum: Result<EmoteEnum, ()> = emote_type.try_into();
+    if emote_enum.is_err() {
+        return Err("{\"type\":\"invalid_syntax\"}".into());
+    }
+    let emote_enum = emote_enum.unwrap();
+
+    let (resp_tx, resp_rx) = sync_channel(1);
+
+    if tx
+        .send(DBHandlerRequest::SendEmote {
+            id: player_id,
+            emote_type: emote_enum,
+            response_sender: resp_tx,
+        })
+        .is_err()
+    {
+        return Err("{\"type\":\"send_emote\", \"status\":\"internal_error\"}".into());
+    }
+
+    if let Ok(db_response) = resp_rx.recv_timeout(DB_REQUEST_TIMEOUT) {
+        if db_response.is_ok() {
+            Ok("{\"type\":\"send_emote\", \"status\":\"ok\"}".into())
+        } else {
+            Err("{\"type\":\"send_emote\", \"status\":\"internal_error\"}".into())
+        }
+    } else {
+        Err("{\"type\":\"send_emote\", \"status\":\"internal_error\"}".into())
+    }
+}

back_end/src/main.rs

@@ -0,0 +1,87 @@
+//Four Line Dropper Backend - A server enabling networked multiplayer for Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+mod ai;
+mod constants;
+mod db_handler;
+mod game_logic;
+mod json_handlers;
+mod random_helper;
+mod state;
+
+const SQLITE_DB_PATH: &str = "./fourLineDropper.db";
+
+use db_handler::DBHandlerRequest;
+
+use std::sync::mpsc::sync_channel;
+
+use db_handler::start_db_handler_thread;
+use tokio::sync::oneshot;
+use warp::{Filter, Rejection};
+
+#[tokio::main]
+async fn main() {
+    let (db_tx, db_rx) = sync_channel::<DBHandlerRequest>(128);
+    let db_tx_clone = db_tx.clone();
+
+    let (shutdown_tx, shutdown_rx) = oneshot::channel::<()>();
+
+    // Required because shutdown_tx is not cloneable, and its "send" consumes
+    // itself.
+    let (s_helper_tx, s_helper_rx) = sync_channel::<()>(1);
+
+    std::thread::spawn(move || {
+        if let Ok(_unused_value) = s_helper_rx.recv() {
+            shutdown_tx
+                .send(())
+                .expect("Should be able to send shutdown signal");
+        }
+    });
+
+    start_db_handler_thread(db_rx, SQLITE_DB_PATH.into(), s_helper_tx.clone());
+
+    let route = warp::body::content_length_limit(1024 * 32)
+        .and(warp::body::bytes())
+        .and_then(move |bytes: bytes::Bytes| {
+            let db_tx_clone = db_tx_clone.clone();
+            let s_helper_tx_clone = s_helper_tx.clone();
+            async move {
+                let body_str_result = std::str::from_utf8(bytes.as_ref());
+                if let Ok(body_str) = body_str_result {
+                    let json_result = serde_json::from_str(body_str);
+                    if let Ok(json_value) = json_result {
+                        Ok(warp::reply::with_header(
+                            json_handlers::handle_json(json_value, db_tx_clone, s_helper_tx_clone)
+                                .unwrap_or_else(|e| e),
+                            "Content-Type",
+                            "application/json",
+                        ))
+                    } else {
+                        Ok(warp::reply::with_header(
+                            String::from("{\"type\": \"invalid_syntax\"}"),
+                            "Content-Type",
+                            "application/json",
+                        ))
+                    }
+                } else {
+                    Ok::<warp::reply::WithHeader<String>, Rejection>(warp::reply::with_header(
+                        String::from("{\"type\": \"invalid_syntax\"}"),
+                        "Content-Type",
+                        "application/json",
+                    ))
+                }
+            }
+        });
+
+    let (_addr, server) =
+        warp::serve(route).bind_with_graceful_shutdown(([0, 0, 0, 0], 1237), async move {
+            shutdown_rx.await.ok();
+        });
+
+    tokio::task::spawn(server).await.unwrap();
+}

back_end/src/random_helper.rs

@@ -0,0 +1,14 @@
+//Four Line Dropper Backend - A server enabling networked multiplayer for Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+use oorandom::Rand32;
+use rand::prelude::*;
+
+pub fn get_seeded_random() -> Result<Rand32, String> {
+    Ok(Rand32::new(thread_rng().gen()))
+}

back_end/src/state.rs

@@ -0,0 +1 @@
+../../front_end/src/state.rs

front_end/COPYING

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
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+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

front_end/Cargo.lock

@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "autocfg"
-version = "1.1.0"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+checksum = "f1fdabc7756949593fe60f30ec81974b613357de856987752631dea1e3394c80"
 
 [[package]]
 name = "boolinator"
@@ -16,9 +16,9 @@ checksum = "cfa8873f51c92e232f9bac4065cddef41b714152812bfc5f7672ba16d6ef8cd9"
 
 [[package]]
 name = "bumpalo"
-version = "3.9.1"
+version = "3.15.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4a45a46ab1f2412e53d3a0ade76ffad2025804294569aae387231a0cd6e0899"
+checksum = "7ff69b9dd49fd426c69a0db9fc04dd934cdb6645ff000864d98f7e2af8830eaa"
 
 [[package]]
 name = "cfg-if"
@@ -40,24 +40,19 @@ dependencies = [
 name = "four_line_dropper_frontend"
 version = "0.1.0"
 dependencies = [
+ "js-sys",
  "log",
- "rand",
+ "oorandom",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
  "wasm-logger",
  "web-sys",
  "yew",
 ]
 
-[[package]]
-name = "getrandom"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d39cd93900197114fa1fcb7ae84ca742095eed9442088988ae74fa744e930e77"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi",
-]
-
 [[package]]
 name = "gloo"
 version = "0.4.2"
@@ -76,10 +71,11 @@ dependencies = [
 
 [[package]]
 name = "gloo-console"
-version = "0.2.1"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3907f786f65bbb4f419e918b0c5674175ef1c231ecda93b2dbd65fd1e8882637"
+checksum = "82b7ce3c05debe147233596904981848862b068862e9ec3e34be446077190d3f"
 dependencies = [
+ "gloo-utils",
  "js-sys",
  "serde",
  "wasm-bindgen",
@@ -88,9 +84,9 @@ dependencies = [
 
 [[package]]
 name = "gloo-dialogs"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ffb557a2ea2ed283f1334423d303a336fad55fb8572d51ae488f828b1464b40"
+checksum = "67062364ac72d27f08445a46cab428188e2e224ec9e37efdba48ae8c289002e6"
 dependencies = [
  "wasm-bindgen",
  "web-sys",
@@ -98,9 +94,9 @@ dependencies = [
 
 [[package]]
 name = "gloo-events"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "088514ec8ef284891c762c88a66b639b3a730134714692ee31829765c5bc814f"
+checksum = "68b107f8abed8105e4182de63845afcc7b69c098b7852a813ea7462a320992fc"
 dependencies = [
  "wasm-bindgen",
  "web-sys",
@@ -108,9 +104,9 @@ dependencies = [
 
 [[package]]
 name = "gloo-file"
-version = "0.2.1"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa5d6084efa4a2b182ef3a8649cb6506cb4843f22cf907c6e0a799944248ae90"
+checksum = "a8d5564e570a38b43d78bdc063374a0c3098c4f0d64005b12f9bbe87e869b6d7"
 dependencies = [
  "gloo-events",
  "js-sys",
@@ -120,9 +116,9 @@ dependencies = [
 
 [[package]]
 name = "gloo-render"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b4cda6e149df3bb4a3c6a343873903e5bcc2448a9877d61bb8274806ad67f6e"
+checksum = "2fd9306aef67cfd4449823aadcd14e3958e0800aa2183955a309112a84ec7764"
 dependencies = [
  "wasm-bindgen",
  "web-sys",
@@ -130,9 +126,9 @@ dependencies = [
 
 [[package]]
 name = "gloo-storage"
-version = "0.2.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b5057761927af1b1929d02b1f49cf83553dd347a473ee7c8bb08420f2673ffc"
+checksum = "5d6ab60bf5dbfd6f0ed1f7843da31b41010515c745735c970e821945ca91e480"
 dependencies = [
  "gloo-utils",
  "js-sys",
@@ -145,9 +141,9 @@ dependencies = [
 
 [[package]]
 name = "gloo-timers"
-version = "0.2.3"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d12a7f4e95cfe710f1d624fb1210b7d961a5fb05c4fd942f4feab06e61f590e"
+checksum = "9b995a66bb87bebce9a0f4a95aed01daca4872c050bfcb21653361c03bc35e5c"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -155,26 +151,28 @@ dependencies = [
 
 [[package]]
 name = "gloo-utils"
-version = "0.1.2"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05c77af6f96a4f9e27c8ac23a88407381a31f4a74c3fb985c85aa79b8d898136"
+checksum = "037fcb07216cb3a30f7292bd0176b050b7b9a052ba830ef7d5d65f6dc64ba58e"
 dependencies = [
  "js-sys",
+ "serde",
+ "serde_json",
  "wasm-bindgen",
  "web-sys",
 ]
 
 [[package]]
 name = "hashbrown"
-version = "0.11.2"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
 [[package]]
 name = "indexmap"
-version = "1.8.0"
+version = "1.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "282a6247722caba404c065016bbfa522806e51714c34f5dfc3e4a3a46fcb4223"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
 dependencies = [
  "autocfg",
  "hashbrown",
@@ -182,15 +180,15 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.1"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
+checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
 [[package]]
 name = "js-sys"
-version = "0.3.56"
+version = "0.3.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a38fc24e30fd564ce974c02bf1d337caddff65be6cc4735a1f7eab22a7440f04"
+checksum = "29c15563dc2726973df627357ce0c9ddddbea194836909d655df6a75d2cf296d"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -201,26 +199,23 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
-[[package]]
-name = "libc"
-version = "0.2.119"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bf2e165bb3457c8e098ea76f3e3bc9db55f87aa90d52d0e6be741470916aaa4"
-
 [[package]]
 name = "log"
-version = "0.4.14"
+version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
-dependencies = [
- "cfg-if",
-]
+checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
 [[package]]
-name = "ppv-lite86"
-version = "0.2.16"
+name = "once_cell"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
+
+[[package]]
+name = "oorandom"
+version = "11.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
 
 [[package]]
 name = "proc-macro-error"
@@ -231,7 +226,7 @@ dependencies = [
  "proc-macro-error-attr",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "version_check",
 ]
 
@@ -248,89 +243,59 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.36"
+version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7342d5883fbccae1cc37a2353b09c87c9b0f3afd73f5fb9bba687a1f733b029"
+checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.15"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "864d3e96a899863136fc6e99f3d7cae289dafe43bf2c5ac19b70df7210c0a145"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "rand"
-version = "0.8.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
-dependencies = [
- "libc",
- "rand_chacha",
- "rand_core",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
-dependencies = [
- "ppv-lite86",
- "rand_core",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.6.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
-dependencies = [
- "getrandom",
-]
-
 [[package]]
 name = "ryu"
-version = "1.0.9"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73b4b750c782965c211b42f022f59af1fbceabdd026623714f104152f1ec149f"
+checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
 
 [[package]]
 name = "scoped-tls-hkt"
-version = "0.1.2"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2e9d7eaddb227e8fbaaa71136ae0e1e913ca159b86c7da82f3e8f0044ad3a63"
+checksum = "3ddc765d3410d9f6c6ca071bf0b67f6b01e3ec4595dc3892f02677e75819dddc"
 
 [[package]]
 name = "serde"
-version = "1.0.136"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce31e24b01e1e524df96f1c2fdd054405f8d7376249a5110886fb4b658484789"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.136"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08597e7152fcd306f41838ed3e37be9eaeed2b61c42e2117266a554fab4662f9"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.58",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.79"
+version = "1.0.115"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e8d9fa5c3b304765ce1fd9c4c8a3de2c8db365a5b91be52f186efc675681d95"
+checksum = "12dc5c46daa8e9fdf4f5e71b6cf9a53f2487da0e86e55808e2d35539666497dd"
 dependencies = [
  "itoa",
  "ryu",
@@ -339,46 +304,60 @@ dependencies = [
 
 [[package]]
 name = "slab"
-version = "0.4.5"
+version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9def91fd1e018fe007022791f865d0ccc9b3a0d5001e01aabb8b40e46000afb5"
+checksum = "8f92a496fb766b417c996b9c5e57daf2f7ad3b0bebe1ccfca4856390e3d3bb67"
+dependencies = [
+ "autocfg",
+]
 
 [[package]]
 name = "syn"
-version = "1.0.86"
+version = "1.0.109"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a65b3f4ffa0092e9887669db0eae07941f023991ab58ea44da8fe8e2d511c6b"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.58"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44cfb93f38070beee36b3fef7d4f5a16f27751d94b187b666a5cc5e9b0d30687"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "thiserror"
-version = "1.0.30"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "854babe52e4df1653706b98fcfc05843010039b406875930a70e4d9644e5c417"
+checksum = "03468839009160513471e86a034bb2c5c0e4baae3b43f79ffc55c4a5427b3297"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.30"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
+checksum = "c61f3ba182994efc43764a46c018c347bc492c79f024e705f46567b418f6d4f7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.58",
 ]
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.2"
+name = "unicode-ident"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
 [[package]]
 name = "version_check"
@@ -386,17 +365,11 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
-[[package]]
-name = "wasi"
-version = "0.10.2+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
-
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.79"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25f1af7423d8588a3d840681122e72e6a24ddbcb3f0ec385cac0d12d24256c06"
+checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
 dependencies = [
  "cfg-if",
  "serde",
@@ -406,24 +379,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.79"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b21c0df030f5a177f3cba22e9bc4322695ec43e7257d865302900290bcdedca"
+checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
 dependencies = [
  "bumpalo",
- "lazy_static",
  "log",
+ "once_cell",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.58",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.29"
+version = "0.4.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2eb6ec270a31b1d3c7e266b999739109abce8b6c87e4b31fcfcd788b65267395"
+checksum = "76bc14366121efc8dbb487ab05bcc9d346b3b5ec0eaa76e46594cabbe51762c0"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -433,9 +406,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.79"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f4203d69e40a52ee523b2529a773d5ffc1dc0071801c87b3d270b471b80ed01"
+checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -443,22 +416,22 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.79"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfa8a30d46208db204854cadbb5d4baf5fcf8071ba5bf48190c3e59937962ebc"
+checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.58",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.79"
+version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d958d035c4438e28c70e4321a2911302f10135ce78a9c7834c0cab4123d06a2"
+checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
 
 [[package]]
 name = "wasm-logger"
@@ -473,9 +446,9 @@ dependencies = [
 
 [[package]]
 name = "web-sys"
-version = "0.3.56"
+version = "0.3.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c060b319f29dd25724f09a2ba1418f142f539b2be99fbf4d2d5a8f7330afb8eb"
+checksum = "77afa9a11836342370f4817622a2f0f418b134426d91a82dfb48f532d2ec13ef"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -511,5 +484,5 @@ dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]

front_end/Cargo.toml

@@ -9,5 +9,11 @@ edition = "2021"
 yew = "0.19"
 log = "0.4.6"
 wasm-logger = "0.2.0"
-web-sys = { version = "0.3.56", features = ["Window", "Document", "Element"] }
-rand = "0.8.5"
+web-sys = { version = "0.3.56", features = ["Window", "Document", "Element", "Request", "RequestInit", "Headers", "RequestMode", "Response", "ReadableStream", "AddEventListenerOptions", "EventListenerOptions", "EventTarget"] }
+js-sys = "0.3.56"
+oorandom = "11.1.3"
+wasm-bindgen = { version = "0.2.79", features = ["serde-serialize"] }
+wasm-bindgen-futures = "0.4.29"
+serde = { version = "1.0", features = ["derive"] }
+serde_derive = "1.0"
+serde_json = "1.0"

front_end/README.md

@@ -8,3 +8,12 @@
   - Serve the front-end via trunk.
       - `trunk serve`
         - This should serve a local server at `127.0.0.1:8080`
+
+# Other Notes
+
+The webserver hosting this `front_end` is [here](https://asdm.seodisparate.com).
+
+Note that this website may not host the latest version of this `front_end`.
+
+See [choose-a-license](https://choosealicense.com/licenses/gpl-3.0) for details
+about the software license used.

front_end/index.html

@@ -20,17 +20,72 @@
         gap: 8px;
         grid-auto-rows: 33%;
       }
-      button.menuSinglePlayer {
+      div.singlePlayerMenu {
         grid-row: 2;
         grid-column: 2;
+
+        display: grid;
+      }
+      button.menuSinglePlayerEasy {
+        grid-row: 1;
+        grid-column: 1;
+      }
+      button.menuSinglePlayerNormal {
+        grid-row: 2;
+        grid-column: 1;
+      }
+      button.menuSinglePlayerHard {
+        grid-row: 3;
+        grid-column: 1;
       }
       button.menuLocalMultiplayer {
         grid-row: 2;
         grid-column: 3;
       }
-      button.menuMultiplayer {
+      div.multiplayerMenu {
         grid-row: 2;
         grid-column: 4;
+
+        display: grid;
+      }
+      div.emote_wrapper {
+        grid-row: 4;
+        grid-column: 8;
+        display: grid;
+      }
+      button.emote {
+        font-size: 2em;
+      }
+      b.emote {
+        font-size: 1.5em;
+      }
+      button#emote_smile {
+        grid-row: 1;
+        grid-column: 1;
+      }
+      button#emote_neutral {
+        grid-row: 1;
+        grid-column: 2;
+      }
+      button#emote_frown {
+        grid-row: 1;
+        grid-column: 3;
+      }
+      button#emote_think {
+        grid-row: 1;
+        grid-column: 4;
+      }
+      button.networkedMultiplayer {
+        grid-row: 1;
+        grid-column: 1;
+      }
+      button.NMPhrase {
+        grid-row: 2;
+        grid-column: 1;
+      }
+      input.NMPhrase {
+        grid-row: 3;
+        grid-column: 1;
       }
       b.menuText {
         color: #FFF;
@@ -143,6 +198,43 @@
       button.magenta {
         background: #F0F;
       }
+      button.win {
+        animation-duration: 400ms;
+        animation-name: blink;
+        animation-iteration-count: infinite;
+        animation-direction: alternate;
+      }
+      @keyframes blink {
+        from {
+          opacity: 1;
+        }
+        to {
+          opacity: 0;
+        }
+      }
+      button.placed {
+        animation-duration: 2200ms;
+        animation-name: placed_blink;
+        animation-iteration-count: 1;
+        animation-direction: normal;
+      }
+      @keyframes placed_blink {
+        from {
+          opacity: 1;
+        }
+        50% {
+          opacity: 0;
+        }
+        to {
+          opacity: 1;
+        }
+      }
+      button#resetbutton {
+        background-color: #C55;
+        color: #FFF;
+        grid-row: 2;
+        grid-column: 8;
+      }
     </style>
   </head>
 </html>

front_end/src/ai.rs

@@ -1,10 +1,21 @@
+//Four Line Dropper Frontend/Backend - A webapp that allows one to play a game of Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
 use std::collections::BTreeMap;
 
 use crate::constants::{AI_EASY_MAX_CHOICES, AI_NORMAL_MAX_CHOICES, COLS, ROWS};
-use crate::state::{BoardState, BoardType, Turn};
+use crate::game_logic::check_win_draw;
+use crate::random_helper::get_seeded_random;
+use crate::state::{board_deep_clone, BoardState, BoardType, Turn};
 
-use rand::{thread_rng, Rng};
+const AI_THIRD_MAX_UTILITY: f64 = 0.89;
 
+#[allow(dead_code)]
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum AIDifficulty {
     Easy,
@@ -63,6 +74,8 @@ pub fn get_ai_choice(
     player: Turn,
     board: &BoardType,
 ) -> Result<SlotChoice, String> {
+    let mut rng = get_seeded_random()?;
+
     let mut utilities = Vec::with_capacity(COLS as usize);
     for i in 0..(COLS as usize) {
         let slot = i.into();
@@ -70,7 +83,7 @@ pub fn get_ai_choice(
             return Err("Internal error: get_ai_choice() iterated to SlotChoice::Invalid".into());
         }
         if let Some(utility) = get_utility_for_slot(player, slot, board) {
-            utilities.push(utility);
+            utilities.push((i, utility));
         }
     }
 
@@ -79,14 +92,13 @@ pub fn get_ai_choice(
     }
 
     // shuffle utilities for the cases where there are equivalent utilities
-    let mut utilities: Vec<(usize, f64)> = utilities.into_iter().enumerate().collect();
     if utilities.len() > 1 {
         for i in 1..utilities.len() {
-            utilities.swap(i, thread_rng().gen_range(0..=i));
+            utilities.swap(i, rng.rand_range(0..((i + 1) as u32)) as usize);
         }
     }
 
-    let pick_some_of_choices = |amount: usize| -> Result<SlotChoice, String> {
+    let mut pick_some_of_choices = |amount: usize| -> Result<SlotChoice, String> {
         let mut maximums: BTreeMap<i64, usize> = BTreeMap::new();
         for (idx, utility) in &utilities {
             // f64 cannot be used as Key since it doesn't implement Ord.
@@ -94,7 +106,7 @@ pub fn get_ai_choice(
             // order.
             let mut utility_value = (utility * 10000.0) as i64;
             while maximums.contains_key(&utility_value) {
-                utility_value += thread_rng().gen_range(-3..=3);
+                utility_value += rng.rand_range(0..7) as i64 - 3;
             }
             maximums.insert(utility_value, *idx);
         }
@@ -108,7 +120,7 @@ pub fn get_ai_choice(
 
         // don't use random if only 1 item is to be picked
         let random_number: usize = if mod_amount > 1 {
-            thread_rng().gen::<usize>() % mod_amount
+            rng.rand_u32() as usize % mod_amount
         } else {
             0
         };
@@ -147,7 +159,9 @@ fn get_utility_for_slot(player: Turn, slot: SlotChoice, board: &BoardType) -> Op
         // slot is full, cannot place in slot
         return None;
     }
-    while idx < (ROWS * COLS) as usize && board[idx + COLS as usize].get() == BoardState::Empty {
+    while idx < ((ROWS - 1) * COLS) as usize
+        && board[idx + COLS as usize].get() == BoardState::Empty
+    {
         idx += COLS as usize;
     }
 
@@ -165,25 +179,37 @@ fn get_utility_for_slot(player: Turn, slot: SlotChoice, board: &BoardType) -> Op
 
     // check if placing a token here connects 2 pieces
     if get_block_amount(player.get_opposite(), idx, 2, board) {
-        utility *= 1.5;
-        if utility >= 0.8 {
-            utility = 0.8;
+        utility *= 1.22;
+        if utility >= AI_THIRD_MAX_UTILITY {
+            utility = AI_THIRD_MAX_UTILITY;
         }
     }
 
     // check if placing a token here blocks 2 pieces
     if get_block_amount(player, idx, 2, board) {
-        utility *= 1.2;
-        if utility >= 0.8 {
-            utility = 0.8;
+        utility *= 1.11;
+        if utility >= AI_THIRD_MAX_UTILITY {
+            utility = AI_THIRD_MAX_UTILITY;
         }
     }
 
     // check if placing a token here connects 1 piece
     if get_block_amount(player.get_opposite(), idx, 1, board) {
-        utility *= 1.09;
-        if utility >= 0.8 {
-            utility = 0.8;
+        utility *= 1.05;
+        if utility >= AI_THIRD_MAX_UTILITY {
+            utility = AI_THIRD_MAX_UTILITY;
+        }
+    }
+
+    // check if placing a token here allows the opposing player to win
+    if idx >= COLS as usize {
+        let cloned_board = board_deep_clone(board);
+        cloned_board[idx].replace(player.into());
+        cloned_board[idx - (COLS as usize)].replace(player.get_opposite().into());
+        if let Some((state, _)) = check_win_draw(&cloned_board) {
+            if state == player.get_opposite().into() {
+                utility *= 0.1;
+            }
         }
     }
 
@@ -213,7 +239,7 @@ fn get_block_amount(player: Turn, idx: usize, amount: usize, board: &BoardType)
     }
 
     // check right
-    count = 0;
+    // count = 0; // don't reset count, since horizontal may pass through idx
     temp_idx = idx;
     while temp_idx % (COLS as usize) < (COLS - 1) as usize {
         temp_idx += 1;
@@ -257,6 +283,21 @@ fn get_block_amount(player: Turn, idx: usize, amount: usize, board: &BoardType)
         }
     }
 
+    // check diagonal right up
+    // count = 0; // don't reset count as diagonal may pass through idx
+    temp_idx = idx;
+    while temp_idx % (COLS as usize) < (COLS - 1) as usize && temp_idx / (COLS as usize) > 0 {
+        temp_idx = temp_idx + 1 - COLS as usize;
+        if board[temp_idx].get() == opposite.into() {
+            count += 1;
+            if count >= amount {
+                return true;
+            }
+        } else {
+            break;
+        }
+    }
+
     // check diagonal right down
     count = 0;
     temp_idx = idx;
@@ -275,7 +316,7 @@ fn get_block_amount(player: Turn, idx: usize, amount: usize, board: &BoardType)
     }
 
     // check diagonal left up
-    count = 0;
+    // count = 0; // don't reset count as diagonal may pass through idx
     temp_idx = idx;
     while temp_idx % (COLS as usize) > 0 && temp_idx / (COLS as usize) > 0 {
         temp_idx = temp_idx - 1 - COLS as usize;
@@ -289,21 +330,27 @@ fn get_block_amount(player: Turn, idx: usize, amount: usize, board: &BoardType)
         }
     }
 
-    // check diagonal right up
-    count = 0;
-    temp_idx = idx;
-    while temp_idx % (COLS as usize) < (COLS - 1) as usize && temp_idx / (COLS as usize) > 0 {
-        temp_idx = temp_idx + 1 - COLS as usize;
-        if board[temp_idx].get() == opposite.into() {
-            count += 1;
-            if count >= amount {
-                return true;
-            }
-        } else {
-            break;
-        }
-    }
-
     // exhausted all possible potential wins, therefore does not block a win
     false
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::state::new_empty_board;
+
+    use super::*;
+
+    #[test]
+    fn test_get_block_amount() {
+        let board = new_empty_board();
+        board[51].set(BoardState::Cyan);
+        board[52].set(BoardState::Cyan);
+        board[53].set(BoardState::Cyan);
+        assert!(!get_block_amount(Turn::MagentaPlayer, 50, 4, &board));
+        assert!(get_block_amount(Turn::MagentaPlayer, 50, 3, &board));
+        assert!(get_block_amount(Turn::MagentaPlayer, 50, 2, &board));
+        assert!(!get_block_amount(Turn::MagentaPlayer, 54, 4, &board));
+        assert!(get_block_amount(Turn::MagentaPlayer, 54, 3, &board));
+        assert!(get_block_amount(Turn::MagentaPlayer, 54, 2, &board));
+    }
+}

front_end/src/constants.rs

@@ -1,7 +1,44 @@
+//Four Line Dropper Frontend/Backend - A webapp that allows one to play a game of Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
 pub const ROWS: u8 = 8;
 pub const COLS: u8 = 7;
 
+#[allow(dead_code)]
 pub const INFO_TEXT_MAX_ITEMS: u32 = 100;
 
 pub const AI_EASY_MAX_CHOICES: usize = 5;
 pub const AI_NORMAL_MAX_CHOICES: usize = 3;
+#[allow(dead_code)]
+pub const AI_CHOICE_DURATION_MILLIS: i32 = 1000;
+
+#[allow(dead_code)]
+pub const PLAYER_COUNT_LIMIT: usize = 1000;
+#[allow(dead_code)]
+pub const TURN_SECONDS: u64 = 25;
+#[allow(dead_code)]
+pub const GAME_CLEANUP_TIMEOUT: u64 = (TURN_SECONDS + 1) * ((ROWS * COLS) as u64 + 5u64);
+#[allow(dead_code)]
+pub const PLAYER_CLEANUP_TIMEOUT: u64 = 300;
+
+#[allow(dead_code)]
+pub const BACKEND_TICK_DURATION_MILLIS: i32 = 500;
+#[allow(dead_code)]
+pub const BACKEND_CLEANUP_INTERVAL_SECONDS: u64 = 120;
+
+#[allow(dead_code)]
+pub const BACKEND_PHRASE_MAX_LENGTH: usize = 128;
+
+// TODO: Change this to "https://asdm.seodisparate.com/api" when backend is installed
+#[allow(dead_code)]
+#[cfg(debug_assertions)]
+pub const BACKEND_URL: &str = "http://testlocalhost/api";
+
+#[allow(dead_code)]
+#[cfg(not(debug_assertions))]
+pub const BACKEND_URL: &str = "https://asdm.seodisparate.com/api";

front_end/src/game_logic.rs

@@ -0,0 +1,350 @@
+//Four Line Dropper Frontend/Backend - A webapp that allows one to play a game of Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+use crate::constants::{COLS, ROWS};
+use crate::state::{BoardState, BoardType};
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub enum WinType {
+    Horizontal(usize),
+    Vertical(usize),
+    DiagonalUp(usize),
+    DiagonalDown(usize),
+    None,
+}
+
+/// Returns a BoardState if win/draw, None if game is still going
+pub fn check_win_draw(board: &BoardType) -> Option<(BoardState, WinType)> {
+    let mut has_empty_slot = false;
+    for slot in board {
+        match slot.get() {
+            BoardState::Empty => {
+                has_empty_slot = true;
+                break;
+            }
+            BoardState::Cyan
+            | BoardState::CyanWin
+            | BoardState::Magenta
+            | BoardState::MagentaWin => (),
+        }
+    }
+
+    if !has_empty_slot {
+        return Some((BoardState::Empty, WinType::None));
+    }
+
+    let check_result = |state| -> Option<BoardState> {
+        match state {
+            BoardState::Empty => None,
+            BoardState::Cyan | BoardState::CyanWin => Some(BoardState::Cyan),
+            BoardState::Magenta | BoardState::MagentaWin => Some(BoardState::Magenta),
+        }
+    };
+
+    // check horizontals
+    for y in 0..(ROWS as usize) {
+        for x in 0..((COLS - 3) as usize) {
+            let idx = x + y * (COLS as usize);
+            let result = check_result(has_right_horizontal_at_idx(idx, board));
+            if let Some(result) = result {
+                return Some((result, WinType::Horizontal(idx)));
+            }
+        }
+    }
+
+    // check verticals
+    for y in 0..((ROWS - 3) as usize) {
+        for x in 0..(COLS as usize) {
+            let idx = x + y * (COLS as usize);
+            let result = check_result(has_down_vertical_at_idx(idx, board));
+            if let Some(result) = result {
+                return Some((result, WinType::Vertical(idx)));
+            }
+        }
+    }
+
+    // check up diagonals
+    for y in 3..(ROWS as usize) {
+        for x in 0..((COLS - 3) as usize) {
+            let idx = x + y * (COLS as usize);
+            let result = check_result(has_right_up_diagonal_at_idx(idx, board));
+            if let Some(result) = result {
+                return Some((result, WinType::DiagonalUp(idx)));
+            }
+        }
+    }
+
+    // check down diagonals
+    for y in 0..((ROWS - 3) as usize) {
+        for x in 0..((COLS - 3) as usize) {
+            let idx = x + y * (COLS as usize);
+            let result = check_result(has_right_down_diagonal_at_idx(idx, board));
+            if let Some(result) = result {
+                return Some((result, WinType::DiagonalDown(idx)));
+            }
+        }
+    }
+
+    None
+}
+
+fn has_right_horizontal_at_idx(idx: usize, board: &BoardType) -> BoardState {
+    let state_at_idx = board[idx].get();
+    if idx % (COLS as usize) < (COLS as usize) - 3 {
+        for x in 0..=3 {
+            if board[idx + x].get() != state_at_idx {
+                break;
+            } else if x == 3 {
+                return state_at_idx;
+            }
+        }
+    }
+
+    BoardState::Empty
+}
+
+fn has_down_vertical_at_idx(idx: usize, board: &BoardType) -> BoardState {
+    let state_at_idx = board[idx].get();
+    if idx / (COLS as usize) < (ROWS as usize) - 3 {
+        for y in 0..=3 {
+            if board[idx + y * (COLS as usize)].get() != state_at_idx {
+                break;
+            } else if y == 3 {
+                return state_at_idx;
+            }
+        }
+    }
+
+    BoardState::Empty
+}
+
+fn has_right_up_diagonal_at_idx(idx: usize, board: &BoardType) -> BoardState {
+    let state_at_idx = board[idx].get();
+    if idx % (COLS as usize) < (COLS as usize) - 3 && idx / (COLS as usize) > 2 {
+        for i in 0..=3 {
+            if board[idx + i - i * (COLS as usize)].get() != state_at_idx {
+                break;
+            } else if i == 3 {
+                return state_at_idx;
+            }
+        }
+    }
+
+    BoardState::Empty
+}
+
+fn has_right_down_diagonal_at_idx(idx: usize, board: &BoardType) -> BoardState {
+    let state_at_idx = board[idx].get();
+    if idx % (COLS as usize) < (COLS as usize) - 3 && idx / (COLS as usize) < (ROWS as usize) - 3 {
+        for i in 0..=3 {
+            if board[idx + i + i * (COLS as usize)].get() != state_at_idx {
+                break;
+            } else if i == 3 {
+                return state_at_idx;
+            }
+        }
+    }
+    BoardState::Empty
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::state::{new_empty_board, BoardState};
+
+    use super::*;
+
+    #[test]
+    fn test_horizontal_check() {
+        let board = new_empty_board();
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                assert_eq!(
+                    has_right_horizontal_at_idx(x + y * (COLS as usize), &board),
+                    BoardState::Empty
+                );
+            }
+        }
+
+        board[50].replace(BoardState::Cyan);
+        board[51].replace(BoardState::Cyan);
+        board[52].replace(BoardState::Cyan);
+        board[53].replace(BoardState::Cyan);
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                let idx = x + y * (COLS as usize);
+                if idx == 50 {
+                    assert_eq!(has_right_horizontal_at_idx(idx, &board), BoardState::Cyan);
+                } else {
+                    assert_eq!(has_right_horizontal_at_idx(idx, &board), BoardState::Empty);
+                }
+            }
+        }
+
+        board[51].replace(BoardState::Magenta);
+
+        board[43].replace(BoardState::Magenta);
+        board[44].replace(BoardState::Magenta);
+        board[45].replace(BoardState::Magenta);
+        board[46].replace(BoardState::Magenta);
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                let idx = x + y * (COLS as usize);
+                if idx == 43 {
+                    assert_eq!(
+                        has_right_horizontal_at_idx(idx, &board),
+                        BoardState::Magenta
+                    );
+                } else {
+                    assert_eq!(has_right_horizontal_at_idx(idx, &board), BoardState::Empty);
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn test_vertical_check() {
+        let board = new_empty_board();
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                assert_eq!(
+                    has_down_vertical_at_idx(x + y * (COLS as usize), &board),
+                    BoardState::Empty
+                );
+            }
+        }
+
+        board[30].replace(BoardState::Cyan);
+        board[37].replace(BoardState::Cyan);
+        board[44].replace(BoardState::Cyan);
+        board[51].replace(BoardState::Cyan);
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                let idx = x + y * (COLS as usize);
+                if idx == 30 {
+                    assert_eq!(has_down_vertical_at_idx(idx, &board), BoardState::Cyan);
+                } else {
+                    assert_eq!(has_down_vertical_at_idx(idx, &board), BoardState::Empty);
+                }
+            }
+        }
+
+        board[16].replace(BoardState::Magenta);
+        board[23].replace(BoardState::Magenta);
+        board[30].replace(BoardState::Magenta);
+        board[37].replace(BoardState::Magenta);
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                let idx = x + y * (COLS as usize);
+                if idx == 16 {
+                    assert_eq!(has_down_vertical_at_idx(idx, &board), BoardState::Magenta);
+                } else {
+                    assert_eq!(has_down_vertical_at_idx(idx, &board), BoardState::Empty);
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn test_upper_diagonal_check() {
+        let board = new_empty_board();
+
+        board[44].replace(BoardState::Cyan);
+        board[38].replace(BoardState::Cyan);
+        board[32].replace(BoardState::Cyan);
+        board[26].replace(BoardState::Cyan);
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                let idx = x + y * (COLS as usize);
+                if idx == 44 {
+                    assert_eq!(has_right_up_diagonal_at_idx(idx, &board), BoardState::Cyan);
+                } else {
+                    assert_eq!(has_right_up_diagonal_at_idx(idx, &board), BoardState::Empty);
+                }
+            }
+        }
+
+        board[38].replace(BoardState::Magenta);
+
+        board[28].replace(BoardState::Magenta);
+        board[22].replace(BoardState::Magenta);
+        board[16].replace(BoardState::Magenta);
+        board[10].replace(BoardState::Magenta);
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                let idx = x + y * (COLS as usize);
+                if idx == 28 {
+                    assert_eq!(
+                        has_right_up_diagonal_at_idx(idx, &board),
+                        BoardState::Magenta
+                    );
+                } else {
+                    assert_eq!(has_right_up_diagonal_at_idx(idx, &board), BoardState::Empty);
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn test_lower_diagonal_check() {
+        let board = new_empty_board();
+
+        board[17].replace(BoardState::Cyan);
+        board[25].replace(BoardState::Cyan);
+        board[33].replace(BoardState::Cyan);
+        board[41].replace(BoardState::Cyan);
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                let idx = x + y * (COLS as usize);
+                if idx == 17 {
+                    assert_eq!(
+                        has_right_down_diagonal_at_idx(idx, &board),
+                        BoardState::Cyan
+                    );
+                } else {
+                    assert_eq!(
+                        has_right_down_diagonal_at_idx(idx, &board),
+                        BoardState::Empty
+                    );
+                }
+            }
+        }
+
+        board[25].replace(BoardState::Magenta);
+
+        board[28].replace(BoardState::Magenta);
+        board[36].replace(BoardState::Magenta);
+        board[44].replace(BoardState::Magenta);
+        board[52].replace(BoardState::Magenta);
+
+        for y in 0..(ROWS as usize) {
+            for x in 0..(COLS as usize) {
+                let idx = x + y * (COLS as usize);
+                if idx == 28 {
+                    assert_eq!(
+                        has_right_down_diagonal_at_idx(idx, &board),
+                        BoardState::Magenta
+                    );
+                } else {
+                    assert_eq!(
+                        has_right_down_diagonal_at_idx(idx, &board),
+                        BoardState::Empty
+                    );
+                }
+            }
+        }
+    }
+}

front_end/src/html_helper.rs

@@ -0,0 +1,175 @@
+//Four Line Dropper Frontend - A webapp that allows one to play a game of Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+use js_sys::{Function, JsString, Promise};
+use std::collections::HashMap;
+use wasm_bindgen::{JsCast, JsValue};
+use wasm_bindgen_futures::JsFuture;
+use web_sys::{window, Document, Window};
+
+use crate::constants::BACKEND_URL;
+
+pub fn get_window_document() -> Result<(Window, Document), String> {
+    let window = window().ok_or_else(|| String::from("Failed to get window"))?;
+    let document = window
+        .document()
+        .ok_or_else(|| String::from("Failed to get document"))?;
+
+    Ok((window, document))
+}
+
+pub fn append_to_info_text(
+    document: &Document,
+    id: &str,
+    msg: &str,
+    limit: u32,
+) -> Result<(), String> {
+    let info_text = document
+        .get_element_by_id(id)
+        .ok_or_else(|| format!("Failed to get info_text \"{}\"", id))?;
+
+    let height = info_text.client_height();
+
+    // create the new text to be appended in the text
+    let p = document
+        .create_element("p")
+        .map_err(|e| format!("{:?}", e))?;
+
+    p.set_inner_html(msg);
+
+    // check if scrolled to top
+    let at_top: bool = info_text.scroll_top() <= height - info_text.scroll_height();
+
+    // append text to output
+    info_text
+        .append_with_node_1(&p)
+        .map_err(|e| format!("{:?}", e))?;
+
+    while info_text.child_element_count() > limit {
+        info_text
+            .remove_child(
+                &info_text.first_child().ok_or_else(|| {
+                    format!("Failed to get first_child() of info_text \"{}\"", id)
+                })?,
+            )
+            .map_err(|e| format!("{:?}", e))?;
+    }
+
+    if at_top {
+        info_text.set_scroll_top(height - info_text.scroll_height());
+    }
+
+    Ok(())
+}
+
+pub fn element_append_class(document: &Document, id: &str, class: &str) -> Result<(), String> {
+    let element = document
+        .get_element_by_id(id)
+        .ok_or_else(|| format!("Failed to get element with id \"{}\"", id))?;
+    let new_class = format!("{} {}", element.class_name(), class);
+    element.set_class_name(&string_remove_extra_whitespace(&new_class));
+
+    Ok(())
+}
+
+pub fn element_remove_class(document: &Document, id: &str, class: &str) -> Result<(), String> {
+    let element = document
+        .get_element_by_id(id)
+        .ok_or_else(|| format!("Failed to get element with id \"{}\"", id))?;
+    let mut element_class: String = element.class_name();
+    let idx_opt = element_class.find(class);
+    if let Some(idx) = idx_opt {
+        let mut remaining = element_class.split_off(idx);
+        element_class += &remaining.split_off(class.len());
+    }
+    element.set_class_name(&string_remove_extra_whitespace(&element_class));
+
+    Ok(())
+}
+
+fn string_remove_extra_whitespace(s: &str) -> String {
+    let mut replacement_string = String::with_capacity(s.len());
+    let mut is_space = false;
+    for c in s.chars() {
+        if c != ' ' {
+            replacement_string.push(c);
+            is_space = false;
+        } else if is_space {
+            continue;
+        } else {
+            replacement_string.push(c);
+            is_space = true;
+        }
+    }
+
+    replacement_string
+}
+
+pub fn element_has_class(document: &Document, id: &str, class: &str) -> Result<bool, String> {
+    let element = document
+        .get_element_by_id(id)
+        .ok_or_else(|| format!("Failed to get element with id \"{}\"", id))?;
+    let element_class: String = element.class_name();
+
+    Ok(element_class.contains(class))
+}
+
+pub async fn send_to_backend(entries: HashMap<String, String>) -> Result<String, String> {
+    let mut send_json_string = String::from("{");
+    for (key, value) in entries {
+        send_json_string.push('"');
+        send_json_string.push_str(&key);
+        send_json_string.push_str("\":");
+        if key == "id" || key == "position" {
+            send_json_string.push_str(&value);
+        } else {
+            send_json_string.push('"');
+            send_json_string.push_str(&value);
+            send_json_string.push('"');
+        }
+        send_json_string.push(',');
+    }
+    send_json_string.truncate(send_json_string.len() - 1);
+    send_json_string.push('}');
+
+    // TODO check usage of "no-cors"
+    let function = Function::new_no_args(&format!(
+        "
+        let fetch_settings = {{}};
+        fetch_settings.method = 'POST';
+        fetch_settings.headers = {{}};
+        fetch_settings.headers['Content-Type'] = 'application/json';
+        fetch_settings.headers['Accept'] = 'text/html,application/json';
+        //fetch_settings.mode = 'no-cors';
+        fetch_settings.body = '{}';
+
+        return fetch('{}', fetch_settings)
+            .then((response) => {{
+                return response.text();
+            }});
+    ",
+        send_json_string, BACKEND_URL,
+    ));
+
+    let jsvalue: JsValue = function
+        .call0(&function)
+        .map_err(|e| format!("Failed to POST to backend: {:?}", e))?;
+    let promise: Promise = jsvalue.dyn_into().map_err(|e| {
+        format!(
+            "Failed to get Promise out of JsValue when POSTing to backend: {:?}",
+            e
+        )
+    })?;
+    let future_result: JsValue = JsFuture::from(promise)
+        .await
+        .map_err(|e| format!("Failed to await promise when POSTing to backend: {:?}", e))?;
+
+    let json_string = String::from(JsString::from(future_result));
+
+    Ok(json_string)
+}

front_end/src/main.rs

@@ -1,5 +1,16 @@
+//Four Line Dropper Frontend - A webapp that allows one to play a game of Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
 mod ai;
 mod constants;
+mod game_logic;
+mod html_helper;
+mod random_helper;
 mod state;
 mod yew_components;
 

front_end/src/random_helper.rs

@@ -0,0 +1,14 @@
+//Four Line Dropper Frontend - A webapp that allows one to play a game of Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+use js_sys::Math::random;
+use oorandom::Rand32;
+
+pub fn get_seeded_random() -> Result<Rand32, String> {
+    Ok(Rand32::new((random() * u64::MAX as f64) as u64))
+}

front_end/src/state.rs

@@ -1,15 +1,145 @@
-use crate::yew_components::MainMenuMessage;
-use std::cell::Cell;
+//Four Line Dropper Frontend/Backend - A webapp that allows one to play a game of Four Line Dropper
+//Copyright (C) 2022 Stephen Seo
+//
+//This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+//
+//This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+use crate::ai::AIDifficulty;
+use crate::constants::{COLS, ROWS};
+use crate::game_logic::{check_win_draw, WinType};
+
+use serde::{Deserialize, Serialize};
+
+use std::cell::{Cell, RefCell};
+use std::collections::hash_set::HashSet;
 use std::fmt::Display;
 use std::rc::Rc;
 
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[allow(dead_code)]
+#[derive(Clone, Debug, PartialEq, Eq)]
 pub enum GameState {
     MainMenu,
-    SinglePlayer,
+    SinglePlayer(Turn, AIDifficulty),
     LocalMultiplayer,
-    NetworkedMultiplayer,
-    PostGameResults(Turn),
+    NetworkedMultiplayer {
+        paired: bool,
+        current_side: Option<Turn>,
+        current_turn: Turn,
+        phrase: Option<String>,
+    },
+    PostGameResults(BoardState),
+}
+
+impl GameState {
+    #[allow(dead_code)]
+    pub fn is_networked_multiplayer(&self) -> bool {
+        matches!(
+            *self,
+            GameState::NetworkedMultiplayer {
+                paired: _,
+                current_side: _,
+                current_turn: _,
+                phrase: _,
+            }
+        )
+    }
+
+    #[allow(dead_code)]
+    pub fn set_networked_paired(&mut self) {
+        if let GameState::NetworkedMultiplayer {
+            ref mut paired,
+            current_side: _,
+            current_turn: _,
+            phrase: _,
+        } = self
+        {
+            *paired = true;
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn get_networked_current_side(&self) -> Option<Turn> {
+        if let GameState::NetworkedMultiplayer {
+            paired: _,
+            current_side,
+            current_turn: _,
+            phrase: _,
+        } = *self
+        {
+            current_side
+        } else {
+            None
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn set_networked_current_side(&mut self, side: Option<Turn>) {
+        if let GameState::NetworkedMultiplayer {
+            paired: _,
+            ref mut current_side,
+            current_turn: _,
+            phrase: _,
+        } = self
+        {
+            *current_side = side;
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn get_current_turn(&self) -> Turn {
+        if let GameState::SinglePlayer(turn, _) = *self {
+            turn
+        } else if let GameState::NetworkedMultiplayer {
+            paired: _,
+            current_side: _,
+            current_turn,
+            phrase: _,
+        } = *self
+        {
+            current_turn
+        } else {
+            Turn::CyanPlayer
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn set_networked_current_turn(&mut self, turn: Turn) {
+        if let GameState::NetworkedMultiplayer {
+            paired: _,
+            current_side: _,
+            ref mut current_turn,
+            phrase: _,
+        } = self
+        {
+            *current_turn = turn;
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn get_phrase(&self) -> Option<String> {
+        if let GameState::NetworkedMultiplayer {
+            paired: _,
+            current_side: _,
+            current_turn: _,
+            phrase,
+        } = self
+        {
+            phrase.clone()
+        } else {
+            None
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn get_singleplayer_current_side(&self) -> Option<Turn> {
+        if let GameState::SinglePlayer(turn, _) = *self {
+            Some(turn)
+        } else {
+            None
+        }
+    }
 }
 
 impl Default for GameState {
@@ -21,18 +151,26 @@ impl Default for GameState {
 impl From<MainMenuMessage> for GameState {
     fn from(msg: MainMenuMessage) -> Self {
         match msg {
-            MainMenuMessage::SinglePlayer => GameState::SinglePlayer,
+            MainMenuMessage::SinglePlayer(t, ai) => GameState::SinglePlayer(t, ai),
             MainMenuMessage::LocalMultiplayer => GameState::LocalMultiplayer,
-            MainMenuMessage::NetworkedMultiplayer => GameState::NetworkedMultiplayer,
+            MainMenuMessage::NetworkedMultiplayer(phrase) => GameState::NetworkedMultiplayer {
+                paired: false,
+                current_side: None,
+                current_turn: Turn::CyanPlayer,
+                phrase,
+            },
         }
     }
 }
 
+#[allow(dead_code)]
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum BoardState {
     Empty,
     Cyan,
     Magenta,
+    CyanWin,
+    MagentaWin,
 }
 
 impl Default for BoardState {
@@ -46,7 +184,9 @@ impl Display for BoardState {
         match *self {
             BoardState::Empty => f.write_str("open"),
             BoardState::Cyan => f.write_str("cyan"),
+            BoardState::CyanWin => f.write_str("cyan win"),
             BoardState::Magenta => f.write_str("magenta"),
+            BoardState::MagentaWin => f.write_str("magenta win"),
         }
     }
 }
@@ -61,11 +201,39 @@ impl From<Turn> for BoardState {
 }
 
 impl BoardState {
+    #[allow(dead_code)]
     pub fn is_empty(&self) -> bool {
         *self == BoardState::Empty
     }
+
+    #[allow(dead_code)]
+    pub fn is_win(self) -> bool {
+        match self {
+            BoardState::Empty | BoardState::Cyan | BoardState::Magenta => false,
+            BoardState::CyanWin | BoardState::MagentaWin => true,
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn into_win(self) -> Self {
+        match self {
+            BoardState::Empty => BoardState::Empty,
+            BoardState::Cyan | BoardState::CyanWin => BoardState::CyanWin,
+            BoardState::Magenta | BoardState::MagentaWin => BoardState::MagentaWin,
+        }
+    }
+
+    #[allow(dead_code, clippy::wrong_self_convention)]
+    pub fn from_win(self) -> Self {
+        match self {
+            BoardState::Empty => BoardState::Empty,
+            BoardState::Cyan | BoardState::CyanWin => BoardState::Cyan,
+            BoardState::Magenta | BoardState::MagentaWin => BoardState::Magenta,
+        }
+    }
 }
 
+#[allow(dead_code)]
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum Turn {
     CyanPlayer,
@@ -84,13 +252,14 @@ impl Display for Turn {
 impl From<BoardState> for Turn {
     fn from(board_state: BoardState) -> Self {
         match board_state {
-            BoardState::Empty | BoardState::Cyan => Turn::CyanPlayer,
-            BoardState::Magenta => Turn::MagentaPlayer,
+            BoardState::Empty | BoardState::Cyan | BoardState::CyanWin => Turn::CyanPlayer,
+            BoardState::Magenta | BoardState::MagentaWin => Turn::MagentaPlayer,
         }
     }
 }
 
 impl Turn {
+    #[allow(dead_code)]
     pub fn get_color(&self) -> &str {
         match *self {
             Turn::CyanPlayer => "cyan",
@@ -108,77 +277,478 @@ impl Turn {
 
 pub type BoardType = [Rc<Cell<BoardState>>; 56];
 
+#[allow(dead_code)]
+pub fn new_empty_board() -> BoardType {
+    [
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+        Rc::new(Cell::new(BoardState::default())),
+    ]
+}
+
+#[allow(dead_code)]
+pub fn board_deep_clone(board: &BoardType) -> BoardType {
+    let cloned_board = new_empty_board();
+    for i in 0..board.len() {
+        cloned_board[i].replace(board[i].get());
+    }
+
+    cloned_board
+}
+
+pub type PlacedType = [Rc<Cell<bool>>; 56];
+
+#[allow(dead_code)]
+pub fn new_placed() -> PlacedType {
+    [
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+        Rc::new(Cell::new(false)),
+    ]
+}
+
+#[allow(dead_code)]
 #[derive(Clone, Debug, PartialEq)]
 pub struct SharedState {
     pub board: BoardType,
-    pub game_state: Rc<Cell<GameState>>,
+    pub game_state: Rc<RefCell<GameState>>,
     pub turn: Rc<Cell<Turn>>,
+    pub placed: PlacedType,
 }
 
 impl Default for SharedState {
     fn default() -> Self {
         Self {
             // cannot use [<type>; 56] because Rc does not impl Copy
-            board: [
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-                Rc::new(Cell::new(BoardState::default())),
-            ],
-            game_state: Rc::new(Cell::new(GameState::default())),
+            board: new_empty_board(),
+            game_state: Rc::new(RefCell::new(GameState::default())),
             turn: Rc::new(Cell::new(Turn::CyanPlayer)),
+            placed: new_placed(),
         }
     }
 }
+
+// This enum moved from yew_components module so that this module would have no
+// dependencies on the yew_components module
+#[allow(dead_code)]
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum MainMenuMessage {
+    SinglePlayer(Turn, AIDifficulty),
+    LocalMultiplayer,
+    NetworkedMultiplayer(Option<String>),
+}
+
+#[allow(dead_code)]
+pub fn new_string_board() -> String {
+    let mut board = String::with_capacity(56);
+    for _i in 0..56 {
+        board.push('a');
+    }
+    board
+}
+
+#[allow(dead_code)]
+pub fn board_from_string(board_string: &str) -> BoardType {
+    let board = new_empty_board();
+
+    for (idx, c) in board_string.chars().enumerate() {
+        match c {
+            'a' => board[idx].replace(BoardState::Empty),
+            'b' | 'f' => board[idx].replace(BoardState::Cyan),
+            'd' | 'h' => board[idx].replace(BoardState::CyanWin),
+            'c' | 'g' => board[idx].replace(BoardState::Magenta),
+            'e' | 'i' => board[idx].replace(BoardState::MagentaWin),
+            _ => BoardState::Empty,
+        };
+    }
+
+    board
+}
+
+/// Returns the board as a String, and None if game has not ended, Empty if game
+/// ended in a draw, or a player if that player has won
+#[allow(dead_code)]
+pub fn string_from_board(board: &BoardType, placed: usize) -> (String, Option<BoardState>) {
+    let mut board_string = String::with_capacity(56);
+
+    // check for winning pieces
+    let mut win_set: HashSet<usize> = HashSet::new();
+    let win_opt = check_win_draw(board);
+    if let Some((_board_state, win_type)) = win_opt {
+        match win_type {
+            WinType::Horizontal(pos) => {
+                for i in pos..(pos + 4) {
+                    win_set.insert(i);
+                }
+            }
+            WinType::Vertical(pos) => {
+                for i in 0..4 {
+                    win_set.insert(pos + i * COLS as usize);
+                }
+            }
+            WinType::DiagonalUp(pos) => {
+                for i in 0..4 {
+                    win_set.insert(pos + i - i * COLS as usize);
+                }
+            }
+            WinType::DiagonalDown(pos) => {
+                for i in 0..4 {
+                    win_set.insert(pos + i + i * COLS as usize);
+                }
+            }
+            WinType::None => (),
+        }
+    }
+
+    // set values to String
+    let mut is_full = true;
+    for (idx, board_state) in board.iter().enumerate().take((COLS * ROWS) as usize) {
+        board_string.push(match board_state.get() {
+            BoardState::Empty => {
+                is_full = false;
+                'a'
+            }
+            BoardState::Cyan | BoardState::CyanWin => {
+                if win_set.contains(&idx) {
+                    if idx == placed {
+                        'h'
+                    } else {
+                        'd'
+                    }
+                } else if idx == placed {
+                    'f'
+                } else {
+                    'b'
+                }
+            }
+            BoardState::Magenta | BoardState::MagentaWin => {
+                if win_set.contains(&idx) {
+                    if idx == placed {
+                        'i'
+                    } else {
+                        'e'
+                    }
+                } else if idx == placed {
+                    'g'
+                } else {
+                    'c'
+                }
+            }
+        });
+    }
+
+    if is_full && win_set.is_empty() {
+        (board_string, Some(BoardState::Empty))
+    } else if !win_set.is_empty() {
+        let winning_char: char =
+            board_string.chars().collect::<Vec<char>>()[*win_set.iter().next().unwrap()];
+        (
+            board_string.clone(),
+            if winning_char == 'd' || winning_char == 'h' {
+                Some(BoardState::CyanWin)
+            } else {
+                Some(BoardState::MagentaWin)
+            },
+        )
+    } else {
+        (board_string, None)
+    }
+}
+
+#[allow(dead_code)]
+#[derive(Debug, Serialize, Deserialize)]
+pub struct PairingRequestResponse {
+    pub r#type: String,
+    pub id: u32,
+    pub status: String,
+    pub color: Option<String>,
+}
+
+#[allow(dead_code)]
+#[derive(Debug, Serialize, Deserialize)]
+pub struct PairingStatusResponse {
+    pub r#type: String,
+    pub status: String,
+    pub color: Option<String>,
+}
+
+#[allow(dead_code)]
+#[derive(Debug, Serialize, Deserialize)]
+pub struct GameStateResponse {
+    pub r#type: String,
+    pub status: String,
+    pub board: Option<String>,
+    pub peer_emote: Option<String>,
+    pub updated_time: Option<String>,
+}
+
+#[allow(dead_code)]
+#[derive(Debug, Serialize, Deserialize)]
+pub struct PlaceTokenResponse {
+    pub r#type: String,
+    pub status: String,
+    pub board: String,
+}
+
+#[allow(dead_code)]
+#[derive(Debug, Serialize, Deserialize)]
+pub struct SendEmoteRequestResponse {
+    pub r#type: String,
+    pub status: String,
+}
+
+#[allow(dead_code)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub enum NetworkedGameState {
+    CyanTurn,
+    MagentaTurn,
+    CyanWon,
+    MagentaWon,
+    Draw,
+    Disconnected,
+    InternalError,
+    NotPaired,
+    UnknownID,
+}
+
+#[allow(dead_code)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub enum PlacedEnum {
+    Accepted,
+    Illegal,
+    NotYourTurn,
+    Other(NetworkedGameState),
+}
+
+#[allow(dead_code)]
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub enum EmoteEnum {
+    Smile,
+    Neutral,
+    Frown,
+    Think,
+}
+
+impl Display for EmoteEnum {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match *self {
+            EmoteEnum::Smile => f.write_str("smile"),
+            EmoteEnum::Neutral => f.write_str("neutral"),
+            EmoteEnum::Frown => f.write_str("frown"),
+            EmoteEnum::Think => f.write_str("think"),
+        }
+    }
+}
+
+impl TryFrom<&str> for EmoteEnum {
+    type Error = ();
+
+    fn try_from(value: &str) -> Result<Self, Self::Error> {
+        match value.to_lowercase().as_str() {
+            "smile" => Ok(Self::Smile),
+            "neutral" => Ok(Self::Neutral),
+            "frown" => Ok(Self::Frown),
+            "think" => Ok(Self::Think),
+            _ => Err(()),
+        }
+    }
+}
+
+impl From<EmoteEnum> for String {
+    fn from(e: EmoteEnum) -> Self {
+        match e {
+            EmoteEnum::Smile => "smile".into(),
+            EmoteEnum::Neutral => "neutral".into(),
+            EmoteEnum::Frown => "frown".into(),
+            EmoteEnum::Think => "think".into(),
+        }
+    }
+}
+
+impl EmoteEnum {
+    pub fn get_unicode(&self) -> char {
+        match *self {
+            EmoteEnum::Smile => '🙂',
+            EmoteEnum::Neutral => '😐',
+            EmoteEnum::Frown => '🙁',
+            EmoteEnum::Think => '🤔',
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_is_networked_multiplayer_enum() {
+        let state = GameState::MainMenu;
+        assert!(!state.is_networked_multiplayer());
+        let state = GameState::LocalMultiplayer;
+        assert!(!state.is_networked_multiplayer());
+        let state = GameState::NetworkedMultiplayer {
+            paired: false,
+            current_side: None,
+            current_turn: Turn::CyanPlayer,
+            phrase: None,
+        };
+        assert!(state.is_networked_multiplayer());
+        let state = GameState::NetworkedMultiplayer {
+            paired: true,
+            current_side: Some(Turn::CyanPlayer),
+            current_turn: Turn::MagentaPlayer,
+            phrase: None,
+        };
+        assert!(state.is_networked_multiplayer());
+    }
+
+    #[test]
+    fn test_board_string() {
+        let board = new_empty_board();
+        board[49].set(BoardState::Cyan);
+        board[51].set(BoardState::Cyan);
+        board[52].set(BoardState::Cyan);
+        board[53].set(BoardState::Cyan);
+        board[54].set(BoardState::Cyan);
+        board[55].set(BoardState::Magenta);
+
+        let (board_string, state_opt) = string_from_board(&board, 51);
+
+        let board_chars: Vec<char> = board_string.chars().collect();
+        assert_eq!(board_chars[49], 'b');
+        assert_eq!(board_chars[50], 'a');
+        assert_eq!(board_chars[51], 'h');
+        assert_eq!(board_chars[52], 'd');
+        assert_eq!(board_chars[53], 'd');
+        assert_eq!(board_chars[54], 'd');
+        assert_eq!(board_chars[55], 'c');
+
+        assert_eq!(state_opt, Some(BoardState::CyanWin));
+
+        board[49].set(BoardState::Magenta);
+        board[51].set(BoardState::Magenta);
+        board[52].set(BoardState::Magenta);
+        board[53].set(BoardState::Magenta);
+        board[54].set(BoardState::Magenta);
+        board[55].set(BoardState::Cyan);
+
+        let (board_string, state_opt) = string_from_board(&board, 51);
+
+        let board_chars: Vec<char> = board_string.chars().collect();
+        assert_eq!(board_chars[49], 'c');
+        assert_eq!(board_chars[50], 'a');
+        assert_eq!(board_chars[51], 'i');
+        assert_eq!(board_chars[52], 'e');
+        assert_eq!(board_chars[53], 'e');
+        assert_eq!(board_chars[54], 'e');
+        assert_eq!(board_chars[55], 'b');
+
+        assert_eq!(state_opt, Some(BoardState::MagentaWin));
+    }
+}

plans/release_plan.md

@@ -0,0 +1,18 @@
+# Release Plan
+
+The first Sprint will focus on developing the Minimum Viable Product (MVP).
+
+Every Sprint afterwards will iterate on the MVP until it reaches enough
+maturity, or in other words, has implemented all the main features.
+
+After the main features have been implemented, every Sprint afterwards will
+refine the product. See the `technical_release_plan.md` for technical details.
+
+# Sprints
+
+The first Sprint will focus on creating the prototype that will serve as the
+Minimum Viable Product (MVP).
+
+Every Sprint afterwards will choose and work on User Stories that are ideally
+the highest priority (at the time) and of lowest estimated size (priority takes
+precedence, but low sizes are ideal).

plans/technical_release_plan.md

@@ -0,0 +1,51 @@
+# Disclaimer
+
+This Release Plan was created in April, a few weeks after the project weas
+actually started. However, the intended plan for releases has not changed during
+the creation of the project.
+
+# Technical Release Plan
+
+## First Stage: Web-app Minimum Viable Product front-end
+
+The first release will be the Minimum Viable Product (MVP) of the front-end.
+This front-end will display the game board and other pertinent info.
+
+## Second Stage: Develop the front-end MVP
+
+The front-end MVP will be incrementally and iteratively improved until the
+following features are finished:
+  - Local Multiplayer (Two people playing the game on the same device)
+  - Single Player (One person playing against an AI of varying difficulties)
+
+## Third Stage: Define the back-end protocol
+
+In preparation for Networked Multiplayer for the project, the back-end must
+have a protocol defined that both the front-end and back-end must use to
+communicate properly.
+
+## Fourth Stage: Define the back-end database
+
+The back-end must store state and keep track of ongoing Networked Multiplayer
+games. Thus, it is required to set up the database schema that the back-end will
+use for this purpose.
+
+## Fifth Stage: Develop the back-end software
+
+The back-end will be created based on the back-end protocol and back-end
+database schema. Note that the protocol and database schema may change as
+necessary due to further discoveries and feedback regarding the development of
+the back-end
+
+## Sixth Stage: Connect the front-end to the back-end
+
+The front-end will be improved upon to enable the Networked Multiplayer feature
+by communicating with the back-end as described by the back-end protocol. This
+stage will probably also encounter bugs that may arise in either the back-end or
+front-end as this feature is being developed, so bug fixing will probably occur
+as well.
+
+## Seventh Stage: Refinement
+
+At this point, all the main features of Four-Line Dropper are implemented.
+What's left is bug-fixing and implementation of additional extra features.

retrospectives/Sprint3_Retrospective.rtf

@@ -0,0 +1,47 @@
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+Sprint 3 Retrospective}
+\par \pard\plain \s1\rtlch\af6\afs36\ab \ltrch\hich\af4\loch\ilvl0\outlinelevel0\sb240\sa120\keepn\f4\fs36\b\dbch\af5\loch{\listtext\pard\plain \tab}\ls1 \li0\ri0\lin0\rin0\fi0\ql\ltrpar{\loch
+Things to know at first:}
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\ltrpar{\loch
+The first two retrospectives are available in the product backlog values in separate columns. This retrospective is the first one to be split-off into its own document.}
+\par \pard\plain \s1\rtlch\af6\afs36\ab \ltrch\hich\af4\loch\ilvl0\outlinelevel0\sb240\sa120\keepn\f4\fs36\b\dbch\af5\loch{\listtext\pard\plain \tab}\ls1 \li0\ri0\lin0\rin0\fi0\ql\ltrpar{\loch
+About Sprint 3 (with notes about previous Sprints)}
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\ltrpar{\loch
+The first two Sprints had one task that was commented as \u8220\'93almost done\u8221\'94, but because of the definition of done, they were left as unfinished. The first was the \u8220\'93Game Logic Turn Implementation\u8221\'94 which may change due to adding the \u8220\'93Networked Multiplayer\u8221\'94 feature. So it was a dependency on a future task that kept this User Story from being marked completed. The second in the second Sprint was \u8220\'93AI Implementation\u8221\'94, because it could use more tweaking as improvement (which might never be considered done because of how much tweaking is possible). Long story short, Utility-based Game AI is simple and works well for this game where up to 7 possible moves can be made per turn, but can be tweaked in how it determines the utility for each move.}
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\ltrpar\loch
+
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\ltrpar{\loch
+As for Sprint 3, issues in my personal life prevented me from finishing the tasks, and it turns out setting up the backend was more difficult than setting up the game AI. However, most of the \u8220\'93backbone\u8221\'94 of Networked Multiplayer stuff was done (such as defining the database schema at the backend using sqlite, and the protocol for requests to the backend via http requests). So what\u8217\'92s left is mostly busywork, and not much extra planning should be needed.}
+\par \pard\plain \s1\rtlch\af6\afs36\ab \ltrch\hich\af4\loch\ilvl0\outlinelevel0\sb240\sa120\keepn\f4\fs36\b\dbch\af5\loch{\listtext\pard\plain \tab}\ls1 \li0\ri0\lin0\rin0\fi0\ql\ltrpar{\loch
+The Next Sprint}
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\sb0\sa140\ltrpar{\loch
+The goal for this week (Sprint 4 starting March 28}{\loch\super\loch
+th}{\loch
+), is to finish the unfinished tasks from Sprint 3. As long as I allocate time for this, I predict most of the tasks should be finished. On a good week, perhaps all of the planned items for the Sprint will be finished.}
+\par }

retrospectives/Sprint4_Retrospective.rtf

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+Sprint 4 Retrospective}
+\par \pard\plain \s1\rtlch\af8\afs36\alang1081\ab \ltrch\lang1033\langfe2052\hich\af5\loch\ql\widctlpar\hyphpar0\sb240\sa120\keepn\ltrpar\cf0\f5\fs36\lang1033\b\kerning1\dbch\af7\langfe2052\loch{\listtext\pard\plain }\ilvl0\ls2 \li0\ri0\lin0\rin0\fi0\ql\li0\ri0\lin0\rin0\fi0\ltrpar{\loch
+The Work Done}
+\par \pard\plain \s25\rtlch\af8\afs24\alang1081 \ltrch\lang1033\langfe2052\hich\af3\loch\ql\sl276\slmult1\widctlpar\hyphpar0\sb0\sa140\ltrpar\cf0\f3\fs24\lang1033\kerning1\dbch\af6\langfe2052\loch\sl276\slmult1\ql\ltrpar{\loch
+The skeleton code of the backend from the previous week has now been fully fleshed out into a working (possibly buggy) system. Bugs may be discovered when this backend is connected with the frontend of \u8220\'93Four Line Dropper\u8221\'94. Through some (manual) testing, the backend does handle requests made in JSON, and always responds with JSON regarding errors or expected data.}
+\par \pard\plain \s1\rtlch\af8\afs36\alang1081\ab \ltrch\lang1033\langfe2052\hich\af5\loch\ql\widctlpar\hyphpar0\sb240\sa120\keepn\ltrpar\cf0\f5\fs36\lang1033\b\kerning1\dbch\af7\langfe2052\loch{\listtext\pard\plain }\ilvl0\ls2 \li0\ri0\lin0\rin0\fi0\ql\li0\ri0\lin0\rin0\fi0\ltrpar{\loch
+Unfinished Tasks}
+\par \pard\plain \s25\rtlch\af8\afs24\alang1081 \ltrch\lang1033\langfe2052\hich\af3\loch\ql\sl276\slmult1\widctlpar\hyphpar0\sb0\sa140\ltrpar\cf0\f3\fs24\lang1033\kerning1\dbch\af6\langfe2052\loch\sl276\slmult1\ql\ltrpar{\loch
+Again, the tasks that are unfinished actually have a dependency on future tasks. Since these dependent tasks are recurring, it probably is a \u8220\'93code smell\u8221\'94 of User Stories and tasks that have not been sufficiently decomposed enough to avoid this problem. I may rework/split up some User Stories before starting on the next Sprint.}
+\par \pard\plain \s25\rtlch\af8\afs24\alang1081 \ltrch\lang1033\langfe2052\hich\af3\loch\ql\sl276\slmult1\widctlpar\hyphpar0\sb0\sa140\ltrpar\cf0\f3\fs24\lang1033\kerning1\dbch\af6\langfe2052\loch\sl276\slmult1\ql\ltrpar{\loch
+Anyways, the current Sprint is basically \u8220\'93done\u8221\'94, but dependencies on future tasks prevent it from being \u8220\'93officially done\u8221\'94 with all tasks.}
+\par \pard\plain \s1\rtlch\af8\afs36\alang1081\ab \ltrch\lang1033\langfe2052\hich\af5\loch\ql\widctlpar\hyphpar0\sb240\sa120\keepn\ltrpar\cf0\f5\fs36\lang1033\b\kerning1\dbch\af7\langfe2052\loch{\listtext\pard\plain }\ilvl0\ls2 \li0\ri0\lin0\rin0\fi0\ql\li0\ri0\lin0\rin0\fi0\ltrpar{\loch
+What\u8217\'92s Next}
+\par \pard\plain \s25\rtlch\af8\afs24\alang1081 \ltrch\lang1033\langfe2052\hich\af3\loch\ql\sl276\slmult1\widctlpar\hyphpar0\sb0\sa140\ltrpar\cf0\f3\fs24\lang1033\kerning1\dbch\af6\langfe2052\loch\sl276\slmult1\ql\ltrpar{\loch
+As mentioned earlier, I may have to rework the User Stories and Tasks to follow the \u8220\'93INVEST\u8221\'94 acronym better. Then I will attempt to connect the frontend to the backend as the goal of the next Sprint.}
+\par \pard\plain \s1\rtlch\af8\afs36\alang1081\ab \ltrch\lang1033\langfe2052\hich\af5\loch\ql\widctlpar\hyphpar0\sb240\sa120\keepn\ltrpar\cf0\f5\fs36\lang1033\b\kerning1\dbch\af7\langfe2052{\loch
+Post Retrospective Notes}
+\par \pard\plain \s0\rtlch\af8\afs24\alang1081 \ltrch\lang1033\langfe2052\hich\af3\loch\ql\widctlpar\hyphpar0\ltrpar\cf0\f3\fs24\lang1033\kerning1\dbch\af6\langfe2052{\loch
+I\u8217\'92ve decided to keep the User Stories as-is, since the User Stories / Tasks that depend on others should be completed by the end of Sprint 5, except \u8220\'93AI Implementation\u8221\'94 (AI can still be tweaked indefinitely, so it may just be marked done at the end of the project). As long as I have time to finish the required tasks, Everything post Sprint 5 should be \u8220\'93extra\u8221\'94 as the main expected functionality should be finished (unless some bugs are discovered).}
+\par }

retrospectives/Sprint5_Retrospective.rtf

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+Sprint 5 Retrospective}
+\par \pard\plain \s1\rtlch\af7\afs36\ab \ltrch\hich\af4\loch\ilvl0\outlinelevel0\sb240\sa120\keepn\f4\fs36\b\dbch\af5\loch{\listtext\pard\plain \tab}\ls1 \li0\ri0\lin0\rin0\fi0\ql\ltrpar{\loch
+What was done this Sprint}
+\par \pard\plain \s17\loch\sl276\slmult1\sb0\sa140\loch\ql\ltrpar{\loch
+The connection between the back-end and the front-end was set up (with some bug-fixes along the way). This part wasn\u8217\'92t difficult because of the previously planned out back-end protocol made it easier to integrate the connection to the back-end in the front-end. There was an issue at first connecting to the back-end, but it was discovered that it was a browser \u8220\'93feature\u8221\'94 involving \u8220\'93CORS\u8221\'94 (I think) where basically the back-end and the front-end needed to be hosted by the same server (and port), otherwise the front-end would fail to connect to the back-end. This required setting up a testing environment that set this up properly, which also would reflect how the deployed set-up would work (front-end at \u8220\'93}{{\field{\*\fldinst HYPERLINK "https://asdm.seodisparate.com/game" }{\fldrslt {\loch\rtlch\alang255 \ltrch\lang255\langfe255\loch\cf9\lang255\ul\ulc0\dbch\langfe255\loch
+https://asdm.seodisparate.com/game}{}}}\loch
+\u8221\'94 and back-end at \u8220\'93}{{\field{\*\fldinst HYPERLINK "https://asdm.seodisparate.com/api" }{\fldrslt {\loch\rtlch\alang255 \ltrch\lang255\langfe255\loch\cf9\lang255\ul\ulc0\dbch\langfe255\loch
+https://asdm.seodisparate.com/api}{}}}\loch
+\u8221\'94).}
+\par \pard\plain \s1\rtlch\af7\afs36\ab \ltrch\hich\af4\loch\ilvl0\outlinelevel0\sb240\sa120\keepn\f4\fs36\b\dbch\af5\loch{\listtext\pard\plain \tab}\ls1 \li0\ri0\lin0\rin0\fi0\ql\ltrpar{\loch
+What\u8217\'92s Left}
+\par \pard\plain \s17\loch\sl276\slmult1\sb0\sa140\loch\ql\sb0\sa140\ltrpar{\loch
+Now that all the main features of the game have been implemented, what\u8217\'92s left is refinement and possible implementation of \u8220\'93nice-to-have\u8221\'94 features.}
+\par }

retrospectives/Sprint6_Retrospective.rtf

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+{\*\ftnsep\chftnsep}\pgndec\pard\plain \s20\rtlch\af6\afs56\ab \ltrch\hich\af4\loch\qc\sb240\sa120\keepn\f4\fs56\b\dbch\af5\loch\sb240\sa120\ltrpar{\loch
+Sprint 6 Retrospective}
+\par \pard\plain \s1\rtlch\af6\afs36\ab \ltrch\hich\af4\loch\ilvl0\outlinelevel0\sb240\sa120\keepn\f4\fs36\b\dbch\af5\loch{\listtext\pard\plain \tab}\ls1 \li0\ri0\lin0\rin0\fi0\ql\ltrpar{\loch
+What was completed}
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\ltrpar{\loch
+By the end of Sprint 6, almost all User Stories have been marked as done, except for one \u8220\'93Exciter\u8221\'94 User Story (\u8220\'93Board Column Emotes\u8221\'94).}
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\ltrpar{\loch
+This Sprint marked the following User Stories as DONE: \u8220\'93End Game Options\u8221\'94, \u8220\'93AI Implementation\u8221\'94 (fine tuning AI), \u8220\'93In-game Emotes\u8221\'94, and \u8220\'93Multiplayer Phrase Pairing\u8221\'94.}
+\par \pard\plain \s1\rtlch\af6\afs36\ab \ltrch\hich\af4\loch\ilvl0\outlinelevel0\sb240\sa120\keepn\f4\fs36\b\dbch\af5\loch{\listtext\pard\plain \tab}\ls1 \li0\ri0\lin0\rin0\fi0\ql\ltrpar{\loch
+Thoughts}
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\ltrpar{\loch
+It took some work adding the additional functionality for \u8220\'93In-game Emotes\u8221\'94 and \u8220\'93Multiplayer Phrase Pairing\u8221\'94 such that both protocol and database specifications had to be updated (and their usage in the back-end/front-end). In the end, it was nice to get nearly all of the User Stories marked as done. Setting up a MVP (Minimum Viable Product) and building upon it proved to be a good strategy for building up this project. The Scrum process facilitated the organization and set-up for the programming work, and has proven its usefulness.}
+\par \pard\plain \s16\loch\sl276\slmult1\sb0\sa140\loch\ql\sb0\sa140\ltrpar{\loch
+As this final Sprint focused more on \u8220\'93refinement\u8221\'94, the Sprint resulted in a few new (add-on) features and some refactoring/fixes.}
+\par }

specifications/backend_database_specification.md

@@ -0,0 +1,52 @@
+# Backend Database Specification
+
+The backend will use sqlite to store all state for storing players (and their
+IDs, and paired state), and games in progress.
+
+## Table definitions
+
+```
+// enable foreign_keys restrictions
+PRAGMA foreign_keys = ON;
+
+// fields should be self explanatory for the players table
+
+// "phrase" is used to connect players with identical "phrase" text to make it
+// easier to connect with the player one wants to play with
+
+CREATE TABLE players (id INTEGER PRIMARY KEY NOT NULL,
+                      date_added TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                      game_id INTEGER,
+                      phrase TEXT,
+                      FOREIGN KEY(game_id) REFERENCES games(id) ON DELETE CASCADE);
+
+// "cyan_player" and "magenta_player" should correspond to an existing entry in
+// table "players".
+
+// "board" is as explained in backend_protocol_specification.md
+
+// "status" is "0" for cyan's turn, "1" for magenta's turn, "2" for cyan won,
+// "3" for magenta won, "4" for draw.
+
+CREATE TABLE games (id INTEGER PRIMARY KEY NOT NULL,
+                    cyan_player INTEGER UNIQUE,
+                    magenta_player INTEGER UNIQUE,
+                    date_added TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                    board TEXT NOT NULL,
+                    status INTEGER NOT NULL,
+                    turn_time_start TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                    FOREIGN KEY(cyan_player) REFERENCES players (id) ON DELETE SET NULL,
+                    FOREIGN KEY(magenta_player) REFERENCES players (id) ON DELETE SET NULL);
+
+// "type" is one of the four possible emotes
+
+CREATE TABLE emotes (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                     type TEXT NOT NULL,
+                     date_added TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                     receiver_id INTEGER NOT NULL,
+                     FOREIGN KEY(receiver_id) REFERENCES players (id) ON DELETE CASCADE);
+```
+
+"date" entries are used for garbage collection of the database. A predefined
+length of time will be used to cleanup stale entries. Whenever an entry in the
+"games" table is updated, the "date" entry will be updated as well.

specifications/backend_protocol_specification.md

@@ -0,0 +1,185 @@
+# Backend Protocol
+
+The backend will be available at https://asdm.seodisparate.com/api .  
+The frontend will send http POST requests to the URL with JSON as the body
+of the request, and the backend will respond with JSON.
+
+## Requests
+
+1. Request ID and Pairing
+
+```
+    {
+        "type": "pairing_request",
+    }
+```
+
+An optional "phrase" parameter can be sent to match against other players with
+the same "phrase".
+```
+    {
+        "type": "pairing_request",
+        "phrase": "user_defined_phrase",
+    }
+```
+
+2. Check pairing status
+
+```
+    {
+        "type": "check_pairing",
+        "id": "id given by backend",
+    }
+```
+
+3. Request Turn action
+
+```
+    {
+        "id": "id given by backend",
+        "type": "place_token",
+        "position": 7,
+    }
+```
+
+4. Disconnect
+
+```
+    {
+        "id": "id given by backend",
+        "type": "disconnect",
+    }
+```
+
+5. Request Game State:
+
+```
+    {
+        "id": "id given by backend",
+        "type": "game_state",
+    }
+```
+
+6. Chat Emote Send:
+
+```
+    {
+        "id": "id given by backend",
+        "type": "send_emote",
+        "emote": "smile", // or "frown", or "neutral", or "think"
+    }
+```
+
+## Responses
+
+1. Request ID Response
+
+```
+    {
+        "type": "pairing_response",
+        "id": "id set by backend",
+        "status": "waiting",
+    }
+```
+
+```
+    {
+        "type": "pairing_response",
+        "id": "id set by backend",
+        "status": "paired",
+        "color": "cyan", // or "magenta"
+    }
+```
+
+If there are too many players such that a new game cannot be feasibly started,
+then the back-end will respond with "too\_many\_players".
+```
+    {
+        "type": "pairing_response",
+        "status": "too_many_players"
+    }
+```
+
+2. Check pairing status
+
+```
+    {
+        "type": "pairing_status",
+        "status": "waiting", // or "unknown_id"
+    }
+```
+
+```
+    {
+        "type": "pairing_status",
+        "status": "paired",
+        "color": "magenta", // or "cyan"
+    }   
+```
+
+3. Request Turn action Response
+
+```
+    {
+        "type": "place_token",
+        "status": "not_paired_yet", // or "accepted", "illegal",
+                                    // "not_your_turn", "game_ended_draw",
+                                    // "game_ended_cyan_won",
+                                    // "game_ended_magenta_won", "unknown_id"
+        "board": "abcdefg..."       // see protocol 5 response for details
+    }   
+```
+
+4. Disconnect Response
+
+```
+    {
+        "type": "disconnect",
+        "status": "ok", // or "unknown_id"
+    }
+```
+
+5. Request Game State Response
+
+```
+    {
+        "type": "game_state",
+        "status": "not_paired", // or "unknown_id", "cyan_turn", "magenta_turn",
+                                // "cyan_won", "magenta_won", "draw",
+                                // "opponent_disconnected", "internal_error"
+
+        // "board" may not be in the response if "unknown_id" is the status
+        "board": "abcdefg...",// 56-char long string with mapping:
+                              // a - empty
+                              // b - cyan
+                              // c - magenta
+                              // d - cyan winning piece
+                              // e - magenta winning piece
+                              // f - cyan placed
+                              // g - magenta placed
+                              // h - cyan winning and placed piece
+                              // i - magenta winning and placed piece
+        // optional "peer_emote" entry is message from opponent
+        "peer_emote": "smile",// or "frown", or "neutral", or "think"
+
+        // should always be available when "board" is available
+        "updated_time": "2022-04-30 12:00:00"
+    }
+```
+
+6. Send Emote Request Response
+
+```
+    {
+        "type": "send_emote",
+        "status": "ok", // or "invalid_emote", "peer_disconnected",
+                        // "internal_error"
+    }
+```
+
+Note that the backend will stop keeping track of the game once both players have
+successfully requested the Game State once after the game has ended. Thus,
+future requests may return "unknown\_id" as the "status".
+
+Note that if a player has disconnected, the other player will receive a "status"
+of "opponent\_disconnected". Future requests will return "unknown\_id".

spreadsheets/user_stories.fods

@@ -1,20 +1,20 @@
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+ <office:meta><meta:creation-date>2022-02-27T14:56:15.671560282</meta:creation-date><meta:generator>LibreOffice/7.3.2.2$Linux_X86_64 LibreOffice_project/30$Build-2</meta:generator><dc:date>2022-04-25T13:54:57.087569254</dc:date><meta:editing-duration>PT2H15M22S</meta:editing-duration><meta:editing-cycles>40</meta:editing-cycles><meta:document-statistic meta:table-count="1" meta:cell-count="316" meta:object-count="0"/></office:meta>
  <office:settings>
   <config:config-item-set config:name="ooo:view-settings">
    <config:config-item config:name="VisibleAreaTop" config:type="int">0</config:config-item>
    <config:config-item config:name="VisibleAreaLeft" config:type="int">0</config:config-item>
    <config:config-item config:name="VisibleAreaWidth" config:type="int">46383</config:config-item>
-   <config:config-item config:name="VisibleAreaHeight" config:type="int">36844</config:config-item>
+   <config:config-item config:name="VisibleAreaHeight" config:type="int">40502</config:config-item>
    <config:config-item-map-indexed config:name="Views">
     <config:config-item-map-entry>
      <config:config-item config:name="ViewId" config:type="string">view1</config:config-item>
      <config:config-item-map-named config:name="Tables">
       <config:config-item-map-entry config:name="User Stories">
-       <config:config-item config:name="CursorPositionX" config:type="int">4</config:config-item>
-       <config:config-item config:name="CursorPositionY" config:type="int">25</config:config-item>
+       <config:config-item config:name="CursorPositionX" config:type="int">5</config:config-item>
+       <config:config-item config:name="CursorPositionY" config:type="int">27</config:config-item>
        <config:config-item config:name="HorizontalSplitMode" config:type="short">2</config:config-item>
        <config:config-item config:name="VerticalSplitMode" config:type="short">2</config:config-item>
        <config:config-item config:name="HorizontalSplitPosition" config:type="int">1</config:config-item>
@@ -23,7 +23,7 @@
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        <config:config-item config:name="PositionRight" config:type="int">1</config:config-item>
        <config:config-item config:name="PositionTop" config:type="int">0</config:config-item>
-       <config:config-item config:name="PositionBottom" config:type="int">13</config:config-item>
+       <config:config-item config:name="PositionBottom" config:type="int">18</config:config-item>
        <config:config-item config:name="ZoomType" config:type="short">0</config:config-item>
        <config:config-item config:name="ZoomValue" config:type="int">100</config:config-item>
        <config:config-item config:name="PageViewZoomValue" config:type="int">60</config:config-item>
@@ -88,7 +88,7 @@
    <config:config-item config:name="LoadReadonly" config:type="boolean">false</config:config-item>
    <config:config-item config:name="PrinterName" config:type="string">Generic Printer</config:config-item>
    <config:config-item config:name="PrinterPaperFromSetup" config:type="boolean">false</config:config-item>
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+   <config:config-item config:name="PrinterSetup" config:type="base64Binary">pAH+/0dlbmVyaWMgUHJpbnRlcgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAU0dFTlBSVAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAWAAMAxQAAAAAAAAAIAFZUAAAkbQAASm9iRGF0YSAxCnByaW50ZXI9R2VuZXJpYyBQcmludGVyCm9yaWVudGF0aW9uPVBvcnRyYWl0CmNvcGllcz0xCmNvbGxhdGU9ZmFsc2UKbWFyZ2luYWRqdXN0bWVudD0wLDAsMCwwCmNvbG9yZGVwdGg9MjQKcHNsZXZlbD0wCnBkZmRldmljZT0xCmNvbG9yZGV2aWNlPTAKUFBEQ29udGV4dERhdGEKUGFnZVNpemU6TGV0dGVyAER1cGxleDpOb25lAAASAENPTVBBVF9EVVBMRVhfTU9ERQ8ARHVwbGV4TW9kZTo6T2Zm</config:config-item>
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    <config:config-item config:name="RasterResolutionY" config:type="int">1270</config:config-item>
@@ -267,7 +267,7 @@
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    <style:table-cell-properties fo:wrap-option="wrap" fo:border="0.74pt solid #000000"/>
   </style:style>
-  <style:style style:name="ce8" style:family="table-cell" style:parent-style-name="Default">
+  <style:style style:name="ce9" style:family="table-cell" style:parent-style-name="Default">
    <style:table-cell-properties fo:border="0.74pt solid #000000"/>
    <style:text-properties fo:font-weight="bold" style:font-weight-asian="bold" style:font-weight-complex="bold"/>
   </style:style>
@@ -357,7 +357,7 @@
      <text:p><text:sheet-name>???</text:sheet-name><text:s/>(<text:title>???</text:title>)</text:p>
     </style:region-left>
     <style:region-right>
-     <text:p><text:date style:data-style-name="N2" text:date-value="2022-03-01">00/00/0000</text:date>, <text:time style:data-style-name="N2" text:time-value="20:23:48.487639410">00:00:00</text:time></text:p>
+     <text:p><text:date style:data-style-name="N2" text:date-value="2022-04-25">00/00/0000</text:date>, <text:time style:data-style-name="N2" text:time-value="13:53:35.055125671">00:00:00</text:time></text:p>
     </style:region-right>
    </style:header>
    <style:header-left style:display="false"/>
@@ -402,7 +402,7 @@
      <table:table-cell table:style-name="ce38" office:value-type="string" calcext:value-type="string">
       <text:p>Test or Conditions of Satisfaction</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce8" office:value-type="string" calcext:value-type="string">
+     <table:table-cell table:style-name="ce9" office:value-type="string" calcext:value-type="string">
       <text:p>Kano Category</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce44" office:value-type="string" calcext:value-type="string">
@@ -442,17 +442,17 @@
      <table:table-cell table:style-name="ce45" office:value-type="string" calcext:value-type="string">
       <text:p>Mandatory</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce45" table:formula="of:=SUM([.$G3:.$G100])" office:value-type="float" office:value="928" calcext:value-type="float">
-      <text:p>928</text:p>
+     <table:table-cell table:style-name="ce45" table:formula="of:=SUM([.$G3:.$G100])" office:value-type="float" office:value="845" calcext:value-type="float">
+      <text:p>845</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce45" table:formula="of:=SUM([.$H3:.$H100])" office:value-type="float" office:value="174" calcext:value-type="float">
-      <text:p>174</text:p>
+     <table:table-cell table:style-name="ce45" table:formula="of:=SUM([.$H3:.$H100])" office:value-type="float" office:value="182" calcext:value-type="float">
+      <text:p>182</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce45" table:formula="of:=SUM([.$I3:.$I100])" office:value-type="float" office:value="148" calcext:value-type="float">
-      <text:p>148</text:p>
+     <table:table-cell table:style-name="ce45" table:formula="of:=SUM([.$I3:.$I100])" office:value-type="float" office:value="151" calcext:value-type="float">
+      <text:p>151</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce45" table:formula="of:=SUM([.$H2:.$I2])" office:value-type="float" office:value="322" calcext:value-type="float">
-      <text:p>322</text:p>
+     <table:table-cell table:style-name="ce45" table:formula="of:=SUM([.$H2:.$I2])" office:value-type="float" office:value="333" calcext:value-type="float">
+      <text:p>333</text:p>
      </table:table-cell>
      <table:table-cell table:number-columns-repeated="2" table:style-name="ce51" office:value-type="percentage" office:value="1" calcext:value-type="percentage">
       <text:p>100.00%</text:p>
@@ -490,14 +490,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H3:.$I3])" office:value-type="float" office:value="16" calcext:value-type="float">
       <text:p>16</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J3]/[.$J$2]" office:value-type="percentage" office:value="0.0496894409937888" calcext:value-type="percentage">
-      <text:p>4.97%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J3]/[.$J$2]" office:value-type="percentage" office:value="0.0480480480480481" calcext:value-type="percentage">
+      <text:p>4.80%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G3]/[.$G$2]" office:value-type="percentage" office:value="0.0107758620689655" calcext:value-type="percentage">
-      <text:p>1.08%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G3]/[.$G$2]" office:value-type="percentage" office:value="0.0118343195266272" calcext:value-type="percentage">
+      <text:p>1.18%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K3]/[.$L3]" office:value-type="float" office:value="4.6111801242236" calcext:value-type="float">
-      <text:p>4.6111801242236</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K3]/[.$L3]" office:value-type="float" office:value="4.06006006006006" calcext:value-type="float">
+      <text:p>4.06006006006006</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -527,14 +527,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H4:.$I4])" office:value-type="float" office:value="16" calcext:value-type="float">
       <text:p>16</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J4]/[.$J$2]" office:value-type="percentage" office:value="0.0496894409937888" calcext:value-type="percentage">
-      <text:p>4.97%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J4]/[.$J$2]" office:value-type="percentage" office:value="0.0480480480480481" calcext:value-type="percentage">
+      <text:p>4.80%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G4]/[.$G$2]" office:value-type="percentage" office:value="0.0431034482758621" calcext:value-type="percentage">
-      <text:p>4.31%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G4]/[.$G$2]" office:value-type="percentage" office:value="0.0473372781065089" calcext:value-type="percentage">
+      <text:p>4.73%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K4]/[.$L4]" office:value-type="float" office:value="1.1527950310559" calcext:value-type="float">
-      <text:p>1.1527950310559</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K4]/[.$L4]" office:value-type="float" office:value="1.01501501501502" calcext:value-type="float">
+      <text:p>1.01501501501502</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -567,14 +567,14 @@
      <table:table-cell table:style-name="ce47" table:formula="of:=SUM([.$H5:.$I5])" office:value-type="float" office:value="8" calcext:value-type="float">
       <text:p>8</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J5]/[.$J$2]" office:value-type="percentage" office:value="0.0248447204968944" calcext:value-type="percentage">
-      <text:p>2.48%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J5]/[.$J$2]" office:value-type="percentage" office:value="0.024024024024024" calcext:value-type="percentage">
+      <text:p>2.40%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G5]/[.$G$2]" office:value-type="percentage" office:value="0.0398706896551724" calcext:value-type="percentage">
-      <text:p>3.99%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G5]/[.$G$2]" office:value-type="percentage" office:value="0.0437869822485207" calcext:value-type="percentage">
+      <text:p>4.38%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K5]/[.$L5]" office:value-type="float" office:value="0.623132449219406" calcext:value-type="float">
-      <text:p>0.623132449219406</text:p>
+     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K5]/[.$L5]" office:value-type="float" office:value="0.548656764872981" calcext:value-type="float">
+      <text:p>0.548656764872981</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce47" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -607,14 +607,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H6:.$I6])" office:value-type="float" office:value="16" calcext:value-type="float">
       <text:p>16</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J6]/[.$J$2]" office:value-type="percentage" office:value="0.0496894409937888" calcext:value-type="percentage">
-      <text:p>4.97%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J6]/[.$J$2]" office:value-type="percentage" office:value="0.0480480480480481" calcext:value-type="percentage">
+      <text:p>4.80%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G6]/[.$G$2]" office:value-type="percentage" office:value="0.0140086206896552" calcext:value-type="percentage">
-      <text:p>1.40%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G6]/[.$G$2]" office:value-type="percentage" office:value="0.0153846153846154" calcext:value-type="percentage">
+      <text:p>1.54%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K6]/[.$L6]" office:value-type="float" office:value="3.54706163401816" calcext:value-type="float">
-      <text:p>3.54706163401816</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K6]/[.$L6]" office:value-type="float" office:value="3.12312312312312" calcext:value-type="float">
+      <text:p>3.12312312312312</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -644,14 +644,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H7:.$I7])" office:value-type="float" office:value="16" calcext:value-type="float">
       <text:p>16</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J7]/[.$J$2]" office:value-type="percentage" office:value="0.0496894409937888" calcext:value-type="percentage">
-      <text:p>4.97%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J7]/[.$J$2]" office:value-type="percentage" office:value="0.0480480480480481" calcext:value-type="percentage">
+      <text:p>4.80%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G7]/[.$G$2]" office:value-type="percentage" office:value="0.0193965517241379" calcext:value-type="percentage">
-      <text:p>1.94%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G7]/[.$G$2]" office:value-type="percentage" office:value="0.021301775147929" calcext:value-type="percentage">
+      <text:p>2.13%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K7]/[.$L7]" office:value-type="float" office:value="2.56176673567978" calcext:value-type="float">
-      <text:p>2.56176673567978</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K7]/[.$L7]" office:value-type="float" office:value="2.25558892225559" calcext:value-type="float">
+      <text:p>2.25558892225559</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -686,14 +686,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H8:.$I8])" office:value-type="float" office:value="17" calcext:value-type="float">
       <text:p>17</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J8]/[.$J$2]" office:value-type="percentage" office:value="0.0527950310559006" calcext:value-type="percentage">
-      <text:p>5.28%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J8]/[.$J$2]" office:value-type="percentage" office:value="0.0510510510510511" calcext:value-type="percentage">
+      <text:p>5.11%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G8]/[.$G$2]" office:value-type="percentage" office:value="0.0269396551724138" calcext:value-type="percentage">
-      <text:p>2.69%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G8]/[.$G$2]" office:value-type="percentage" office:value="0.029585798816568" calcext:value-type="percentage">
+      <text:p>2.96%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K8]/[.$L8]" office:value-type="float" office:value="1.95975155279503" calcext:value-type="float">
-      <text:p>1.95975155279503</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K8]/[.$L8]" office:value-type="float" office:value="1.72552552552553" calcext:value-type="float">
+      <text:p>1.72552552552553</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -725,14 +725,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H9:.$I9])" office:value-type="float" office:value="18" calcext:value-type="float">
       <text:p>18</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J9]/[.$J$2]" office:value-type="percentage" office:value="0.0559006211180124" calcext:value-type="percentage">
-      <text:p>5.59%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J9]/[.$J$2]" office:value-type="percentage" office:value="0.0540540540540541" calcext:value-type="percentage">
+      <text:p>5.41%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G9]/[.$G$2]" office:value-type="percentage" office:value="0.0247844827586207" calcext:value-type="percentage">
-      <text:p>2.48%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G9]/[.$G$2]" office:value-type="percentage" office:value="0.0272189349112426" calcext:value-type="percentage">
+      <text:p>2.72%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K9]/[.$L9]" office:value-type="float" office:value="2.25546853902241" calcext:value-type="float">
-      <text:p>2.25546853902241</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K9]/[.$L9]" office:value-type="float" office:value="1.98589894242068" calcext:value-type="float">
+      <text:p>1.98589894242068</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -762,14 +762,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H10:.$I10])" office:value-type="float" office:value="16" calcext:value-type="float">
       <text:p>16</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J10]/[.$J$2]" office:value-type="percentage" office:value="0.0496894409937888" calcext:value-type="percentage">
-      <text:p>4.97%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J10]/[.$J$2]" office:value-type="percentage" office:value="0.0480480480480481" calcext:value-type="percentage">
+      <text:p>4.80%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G10]/[.$G$2]" office:value-type="percentage" office:value="0.021551724137931" calcext:value-type="percentage">
-      <text:p>2.16%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G10]/[.$G$2]" office:value-type="percentage" office:value="0.0236686390532544" calcext:value-type="percentage">
+      <text:p>2.37%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K10]/[.$L10]" office:value-type="float" office:value="2.3055900621118" calcext:value-type="float">
-      <text:p>2.3055900621118</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K10]/[.$L10]" office:value-type="float" office:value="2.03003003003003" calcext:value-type="float">
+      <text:p>2.03003003003003</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -802,14 +802,14 @@
      <table:table-cell table:style-name="ce47" table:formula="of:=SUM([.$H11:.$I11])" office:value-type="float" office:value="9" calcext:value-type="float">
       <text:p>9</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J11]/[.$J$2]" office:value-type="percentage" office:value="0.0279503105590062" calcext:value-type="percentage">
-      <text:p>2.80%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J11]/[.$J$2]" office:value-type="percentage" office:value="0.027027027027027" calcext:value-type="percentage">
+      <text:p>2.70%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G11]/[.$G$2]" office:value-type="percentage" office:value="0.0140086206896552" calcext:value-type="percentage">
-      <text:p>1.40%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G11]/[.$G$2]" office:value-type="percentage" office:value="0.0153846153846154" calcext:value-type="percentage">
+      <text:p>1.54%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K11]/[.$L11]" office:value-type="float" office:value="1.99522216913521" calcext:value-type="float">
-      <text:p>1.99522216913521</text:p>
+     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K11]/[.$L11]" office:value-type="float" office:value="1.75675675675676" calcext:value-type="float">
+      <text:p>1.75675675675676</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce47" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -842,14 +842,14 @@
      <table:table-cell table:style-name="ce48" table:formula="of:=SUM([.$H12:.$I12])" office:value-type="float" office:value="17" calcext:value-type="float">
       <text:p>17</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce54" table:formula="of:=[.$J12]/[.$J$2]" office:value-type="percentage" office:value="0.0527950310559006" calcext:value-type="percentage">
-      <text:p>5.28%</text:p>
+     <table:table-cell table:style-name="ce54" table:formula="of:=[.$J12]/[.$J$2]" office:value-type="percentage" office:value="0.0510510510510511" calcext:value-type="percentage">
+      <text:p>5.11%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce54" table:formula="of:=[.$G12]/[.$G$2]" office:value-type="percentage" office:value="0.0258620689655172" calcext:value-type="percentage">
-      <text:p>2.59%</text:p>
+     <table:table-cell table:style-name="ce54" table:formula="of:=[.$G12]/[.$G$2]" office:value-type="percentage" office:value="0.0284023668639053" calcext:value-type="percentage">
+      <text:p>2.84%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce48" table:formula="of:=[.$K12]/[.$L12]" office:value-type="float" office:value="2.04140786749482" calcext:value-type="float">
-      <text:p>2.04140786749482</text:p>
+     <table:table-cell table:style-name="ce48" table:formula="of:=[.$K12]/[.$L12]" office:value-type="float" office:value="1.79742242242242" calcext:value-type="float">
+      <text:p>1.79742242242242</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce48" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -872,8 +872,8 @@
      <table:table-cell table:style-name="ce47" office:value-type="string" calcext:value-type="string">
       <text:p>Exciter</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce47" office:value-type="float" office:value="100" calcext:value-type="float">
-      <text:p>100</text:p>
+     <table:table-cell table:style-name="ce47" office:value-type="float" office:value="70" calcext:value-type="float">
+      <text:p>70</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce47" office:value-type="float" office:value="7" calcext:value-type="float">
       <text:p>7</text:p>
@@ -884,14 +884,14 @@
      <table:table-cell table:style-name="ce47" table:formula="of:=SUM([.$H13:.$I13])" office:value-type="float" office:value="11" calcext:value-type="float">
       <text:p>11</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J13]/[.$J$2]" office:value-type="percentage" office:value="0.0341614906832298" calcext:value-type="percentage">
-      <text:p>3.42%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J13]/[.$J$2]" office:value-type="percentage" office:value="0.033033033033033" calcext:value-type="percentage">
+      <text:p>3.30%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G13]/[.$G$2]" office:value-type="percentage" office:value="0.107758620689655" calcext:value-type="percentage">
-      <text:p>10.78%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G13]/[.$G$2]" office:value-type="percentage" office:value="0.0828402366863905" calcext:value-type="percentage">
+      <text:p>8.28%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K13]/[.$L13]" office:value-type="float" office:value="0.317018633540373" calcext:value-type="float">
-      <text:p>0.317018633540373</text:p>
+     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K13]/[.$L13]" office:value-type="float" office:value="0.398755898755899" calcext:value-type="float">
+      <text:p>0.398755898755899</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce47" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -921,14 +921,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H14:.$I14])" office:value-type="float" office:value="16" calcext:value-type="float">
       <text:p>16</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J14]/[.$J$2]" office:value-type="percentage" office:value="0.0496894409937888" calcext:value-type="percentage">
-      <text:p>4.97%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J14]/[.$J$2]" office:value-type="percentage" office:value="0.0480480480480481" calcext:value-type="percentage">
+      <text:p>4.80%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G14]/[.$G$2]" office:value-type="percentage" office:value="0.0323275862068966" calcext:value-type="percentage">
-      <text:p>3.23%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G14]/[.$G$2]" office:value-type="percentage" office:value="0.0355029585798817" calcext:value-type="percentage">
+      <text:p>3.55%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K14]/[.$L14]" office:value-type="float" office:value="1.53706004140787" calcext:value-type="float">
-      <text:p>1.53706004140787</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K14]/[.$L14]" office:value-type="float" office:value="1.35335335335335" calcext:value-type="float">
+      <text:p>1.35335335335335</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -958,14 +958,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H15:.$I15])" office:value-type="float" office:value="16" calcext:value-type="float">
       <text:p>16</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J15]/[.$J$2]" office:value-type="percentage" office:value="0.0496894409937888" calcext:value-type="percentage">
-      <text:p>4.97%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J15]/[.$J$2]" office:value-type="percentage" office:value="0.0480480480480481" calcext:value-type="percentage">
+      <text:p>4.80%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G15]/[.$G$2]" office:value-type="percentage" office:value="0.0700431034482759" calcext:value-type="percentage">
-      <text:p>7.00%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G15]/[.$G$2]" office:value-type="percentage" office:value="0.0769230769230769" calcext:value-type="percentage">
+      <text:p>7.69%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K15]/[.$L15]" office:value-type="float" office:value="0.709412326803631" calcext:value-type="float">
-      <text:p>0.709412326803631</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K15]/[.$L15]" office:value-type="float" office:value="0.624624624624625" calcext:value-type="float">
+      <text:p>0.624624624624625</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1000,14 +1000,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H16:.$I16])" office:value-type="float" office:value="15" calcext:value-type="float">
       <text:p>15</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J16]/[.$J$2]" office:value-type="percentage" office:value="0.046583850931677" calcext:value-type="percentage">
-      <text:p>4.66%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J16]/[.$J$2]" office:value-type="percentage" office:value="0.045045045045045" calcext:value-type="percentage">
+      <text:p>4.50%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G16]/[.$G$2]" office:value-type="percentage" office:value="0.0754310344827586" calcext:value-type="percentage">
-      <text:p>7.54%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G16]/[.$G$2]" office:value-type="percentage" office:value="0.0828402366863905" calcext:value-type="percentage">
+      <text:p>8.28%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K16]/[.$L16]" office:value-type="float" office:value="0.61756876663709" calcext:value-type="float">
-      <text:p>0.61756876663709</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K16]/[.$L16]" office:value-type="float" office:value="0.543758043758044" calcext:value-type="float">
+      <text:p>0.543758043758044</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1040,14 +1040,14 @@
      <table:table-cell table:style-name="ce47" table:formula="of:=SUM([.$H17:.$I17])" office:value-type="float" office:value="13" calcext:value-type="float">
       <text:p>13</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J17]/[.$J$2]" office:value-type="percentage" office:value="0.0403726708074534" calcext:value-type="percentage">
-      <text:p>4.04%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J17]/[.$J$2]" office:value-type="percentage" office:value="0.039039039039039" calcext:value-type="percentage">
+      <text:p>3.90%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G17]/[.$G$2]" office:value-type="percentage" office:value="0.0829741379310345" calcext:value-type="percentage">
-      <text:p>8.30%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G17]/[.$G$2]" office:value-type="percentage" office:value="0.0911242603550296" calcext:value-type="percentage">
+      <text:p>9.11%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K17]/[.$L17]" office:value-type="float" office:value="0.486569331289828" calcext:value-type="float">
-      <text:p>0.486569331289828</text:p>
+     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K17]/[.$L17]" office:value-type="float" office:value="0.428415428415428" calcext:value-type="float">
+      <text:p>0.428415428415428</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce47" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1068,8 +1068,8 @@
      <table:table-cell table:style-name="ce46" office:value-type="string" calcext:value-type="string">
       <text:p>Mandatory</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" office:value-type="float" office:value="45" calcext:value-type="float">
-      <text:p>45</text:p>
+     <table:table-cell table:style-name="ce46" office:value-type="float" office:value="25" calcext:value-type="float">
+      <text:p>25</text:p>
      </table:table-cell>
      <table:table-cell table:number-columns-repeated="2" table:style-name="ce46" office:value-type="float" office:value="9" calcext:value-type="float">
       <text:p>9</text:p>
@@ -1077,14 +1077,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H18:.$I18])" office:value-type="float" office:value="18" calcext:value-type="float">
       <text:p>18</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J18]/[.$J$2]" office:value-type="percentage" office:value="0.0559006211180124" calcext:value-type="percentage">
-      <text:p>5.59%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J18]/[.$J$2]" office:value-type="percentage" office:value="0.0540540540540541" calcext:value-type="percentage">
+      <text:p>5.41%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G18]/[.$G$2]" office:value-type="percentage" office:value="0.0484913793103448" calcext:value-type="percentage">
-      <text:p>4.85%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G18]/[.$G$2]" office:value-type="percentage" office:value="0.029585798816568" calcext:value-type="percentage">
+      <text:p>2.96%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K18]/[.$L18]" office:value-type="float" office:value="1.1527950310559" calcext:value-type="float">
-      <text:p>1.1527950310559</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K18]/[.$L18]" office:value-type="float" office:value="1.82702702702703" calcext:value-type="float">
+      <text:p>1.82702702702703</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1105,8 +1105,8 @@
      <table:table-cell table:style-name="ce46" office:value-type="string" calcext:value-type="string">
       <text:p>Mandatory</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" office:value-type="float" office:value="50" calcext:value-type="float">
-      <text:p>50</text:p>
+     <table:table-cell table:style-name="ce46" office:value-type="float" office:value="20" calcext:value-type="float">
+      <text:p>20</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" office:value-type="float" office:value="9" calcext:value-type="float">
       <text:p>9</text:p>
@@ -1117,14 +1117,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H19:.$I19])" office:value-type="float" office:value="17" calcext:value-type="float">
       <text:p>17</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J19]/[.$J$2]" office:value-type="percentage" office:value="0.0527950310559006" calcext:value-type="percentage">
-      <text:p>5.28%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J19]/[.$J$2]" office:value-type="percentage" office:value="0.0510510510510511" calcext:value-type="percentage">
+      <text:p>5.11%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G19]/[.$G$2]" office:value-type="percentage" office:value="0.0538793103448276" calcext:value-type="percentage">
-      <text:p>5.39%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G19]/[.$G$2]" office:value-type="percentage" office:value="0.0236686390532544" calcext:value-type="percentage">
+      <text:p>2.37%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K19]/[.$L19]" office:value-type="float" office:value="0.979875776397516" calcext:value-type="float">
-      <text:p>0.979875776397516</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K19]/[.$L19]" office:value-type="float" office:value="2.15690690690691" calcext:value-type="float">
+      <text:p>2.15690690690691</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1145,8 +1145,8 @@
      <table:table-cell table:style-name="ce46" office:value-type="string" calcext:value-type="string">
       <text:p>Mandatory</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" office:value-type="float" office:value="68" calcext:value-type="float">
-      <text:p>68</text:p>
+     <table:table-cell table:style-name="ce46" office:value-type="float" office:value="20" calcext:value-type="float">
+      <text:p>20</text:p>
      </table:table-cell>
      <table:table-cell table:number-columns-repeated="2" table:style-name="ce46" office:value-type="float" office:value="8" calcext:value-type="float">
       <text:p>8</text:p>
@@ -1154,14 +1154,14 @@
      <table:table-cell table:style-name="ce46" table:formula="of:=SUM([.$H20:.$I20])" office:value-type="float" office:value="16" calcext:value-type="float">
       <text:p>16</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J20]/[.$J$2]" office:value-type="percentage" office:value="0.0496894409937888" calcext:value-type="percentage">
-      <text:p>4.97%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$J20]/[.$J$2]" office:value-type="percentage" office:value="0.0480480480480481" calcext:value-type="percentage">
+      <text:p>4.80%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G20]/[.$G$2]" office:value-type="percentage" office:value="0.0732758620689655" calcext:value-type="percentage">
-      <text:p>7.33%</text:p>
+     <table:table-cell table:style-name="ce52" table:formula="of:=[.$G20]/[.$G$2]" office:value-type="percentage" office:value="0.0236686390532544" calcext:value-type="percentage">
+      <text:p>2.37%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K20]/[.$L20]" office:value-type="float" office:value="0.67811472415053" calcext:value-type="float">
-      <text:p>0.67811472415053</text:p>
+     <table:table-cell table:style-name="ce46" table:formula="of:=[.$K20]/[.$L20]" office:value-type="float" office:value="2.03003003003003" calcext:value-type="float">
+      <text:p>2.03003003003003</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce46" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1191,14 +1191,14 @@
      <table:table-cell table:style-name="ce48" table:formula="of:=SUM([.$H21:.$I21])" office:value-type="float" office:value="18" calcext:value-type="float">
       <text:p>18</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce54" table:formula="of:=[.$J21]/[.$J$2]" office:value-type="percentage" office:value="0.0559006211180124" calcext:value-type="percentage">
-      <text:p>5.59%</text:p>
+     <table:table-cell table:style-name="ce54" table:formula="of:=[.$J21]/[.$J$2]" office:value-type="percentage" office:value="0.0540540540540541" calcext:value-type="percentage">
+      <text:p>5.41%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce54" table:formula="of:=[.$G21]/[.$G$2]" office:value-type="percentage" office:value="0.0571120689655172" calcext:value-type="percentage">
-      <text:p>5.71%</text:p>
+     <table:table-cell table:style-name="ce54" table:formula="of:=[.$G21]/[.$G$2]" office:value-type="percentage" office:value="0.0627218934911243" calcext:value-type="percentage">
+      <text:p>6.27%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce48" table:formula="of:=[.$K21]/[.$L21]" office:value-type="float" office:value="0.978788233915387" calcext:value-type="float">
-      <text:p>0.978788233915387</text:p>
+     <table:table-cell table:style-name="ce48" table:formula="of:=[.$K21]/[.$L21]" office:value-type="float" office:value="0.861805201427843" calcext:value-type="float">
+      <text:p>0.861805201427843</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce48" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1231,14 +1231,14 @@
      <table:table-cell table:style-name="ce48" table:formula="of:=SUM([.$H22:.$I22])" office:value-type="float" office:value="15" calcext:value-type="float">
       <text:p>15</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce54" table:formula="of:=[.$J22]/[.$J$2]" office:value-type="percentage" office:value="0.046583850931677" calcext:value-type="percentage">
-      <text:p>4.66%</text:p>
+     <table:table-cell table:style-name="ce54" table:formula="of:=[.$J22]/[.$J$2]" office:value-type="percentage" office:value="0.045045045045045" calcext:value-type="percentage">
+      <text:p>4.50%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce54" table:formula="of:=[.$G22]/[.$G$2]" office:value-type="percentage" office:value="0.0517241379310345" calcext:value-type="percentage">
-      <text:p>5.17%</text:p>
+     <table:table-cell table:style-name="ce54" table:formula="of:=[.$G22]/[.$G$2]" office:value-type="percentage" office:value="0.0568047337278107" calcext:value-type="percentage">
+      <text:p>5.68%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce48" table:formula="of:=[.$K22]/[.$L22]" office:value-type="float" office:value="0.900621118012422" calcext:value-type="float">
-      <text:p>0.900621118012422</text:p>
+     <table:table-cell table:style-name="ce48" table:formula="of:=[.$K22]/[.$L22]" office:value-type="float" office:value="0.792980480480481" calcext:value-type="float">
+      <text:p>0.792980480480481</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce48" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1271,14 +1271,14 @@
      <table:table-cell table:style-name="ce47" table:formula="of:=SUM([.$H23:.$I23])" office:value-type="float" office:value="9" calcext:value-type="float">
       <text:p>9</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J23]/[.$J$2]" office:value-type="percentage" office:value="0.0279503105590062" calcext:value-type="percentage">
-      <text:p>2.80%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J23]/[.$J$2]" office:value-type="percentage" office:value="0.027027027027027" calcext:value-type="percentage">
+      <text:p>2.70%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G23]/[.$G$2]" office:value-type="percentage" office:value="0.0506465517241379" calcext:value-type="percentage">
-      <text:p>5.06%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G23]/[.$G$2]" office:value-type="percentage" office:value="0.0556213017751479" calcext:value-type="percentage">
+      <text:p>5.56%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K23]/[.$L23]" office:value-type="float" office:value="0.551869961675697" calcext:value-type="float">
-      <text:p>0.551869961675697</text:p>
+     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K23]/[.$L23]" office:value-type="float" office:value="0.485911443358252" calcext:value-type="float">
+      <text:p>0.485911443358252</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce47" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1311,14 +1311,14 @@
      <table:table-cell table:style-name="ce47" table:formula="of:=SUM([.$H24:.$I24])" office:value-type="float" office:value="9" calcext:value-type="float">
       <text:p>9</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J24]/[.$J$2]" office:value-type="percentage" office:value="0.0279503105590062" calcext:value-type="percentage">
-      <text:p>2.80%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J24]/[.$J$2]" office:value-type="percentage" office:value="0.027027027027027" calcext:value-type="percentage">
+      <text:p>2.70%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G24]/[.$G$2]" office:value-type="percentage" office:value="0.0560344827586207" calcext:value-type="percentage">
-      <text:p>5.60%</text:p>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G24]/[.$G$2]" office:value-type="percentage" office:value="0.0615384615384615" calcext:value-type="percentage">
+      <text:p>6.15%</text:p>
      </table:table-cell>
-     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K24]/[.$L24]" office:value-type="float" office:value="0.498805542283803" calcext:value-type="float">
-      <text:p>0.498805542283803</text:p>
+     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K24]/[.$L24]" office:value-type="float" office:value="0.439189189189189" calcext:value-type="float">
+      <text:p>0.439189189189189</text:p>
      </table:table-cell>
      <table:table-cell table:style-name="ce47" table:number-columns-repeated="1011"/>
     </table:table-row>
@@ -1343,7 +1343,70 @@
      <table:table-cell table:style-name="ce21" table:number-columns-repeated="2"/>
      <table:table-cell table:style-name="ce13" table:number-columns-repeated="1012"/>
     </table:table-row>
-    <table:table-row table:style-name="ro1" table:number-rows-repeated="1048550">
+    <table:table-row table:style-name="ro6">
+     <table:table-cell table:style-name="ce41" office:value-type="string" calcext:value-type="string">
+      <text:p>Multiplayer Phrase Pairing</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce41" office:value-type="string" calcext:value-type="string">
+      <text:p>Networking</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce41" office:value-type="string" calcext:value-type="string">
+      <text:p>As a player, I would like to be able to pair with another Player I know, by setting up a common phrase that will match me with the Player I know, so that I can play a game with the Player I know.</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce41" office:value-type="string" calcext:value-type="string">
+      <text:p>Set up a “room code” system where Players can specify a “phrase” or “code word” that will only pair them with other Players that use the same “phrase”.</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce41" office:value-type="string" calcext:value-type="string">
+      <text:p>The back-end should be able to pair Players with identical “phrases” or “code words”. The front-end should allow the Player to set a “phrase” or “code word”.</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce47" office:value-type="string" calcext:value-type="string">
+      <text:p>Exciter</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce47" office:value-type="float" office:value="45" calcext:value-type="float">
+      <text:p>45</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce47" office:value-type="float" office:value="8" calcext:value-type="float">
+      <text:p>8</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce47" office:value-type="float" office:value="3" calcext:value-type="float">
+      <text:p>3</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce47" office:value-type="float" office:value="11" calcext:value-type="float">
+      <text:p>11</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$J26]/[.$J$2]" office:value-type="percentage" office:value="0.033033033033033" calcext:value-type="percentage">
+      <text:p>3.30%</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce53" table:formula="of:=[.$G26]/[.$G$2]" office:value-type="percentage" office:value="0.0532544378698225" calcext:value-type="percentage">
+      <text:p>5.33%</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce47" table:formula="of:=[.$K26]/[.$L26]" office:value-type="float" office:value="0.620286953620287" calcext:value-type="float">
+      <text:p>0.620286953620287</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce47" table:number-columns-repeated="1011"/>
+    </table:table-row>
+    <table:table-row table:style-name="ro4">
+     <table:table-cell table:style-name="ce6" office:value-type="string" calcext:value-type="string">
+      <text:p>Refactoring and Code Improvement</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce6" office:value-type="string" calcext:value-type="string">
+      <text:p>Constraint</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce6" office:value-type="string" calcext:value-type="string">
+      <text:p>As I developer, I expect the code to be improved when improvements can be made to improve code quality and prevent technical debt.</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce6"/>
+     <table:table-cell table:style-name="ce6" office:value-type="string" calcext:value-type="string">
+      <text:p>The front-end and back-end code should be reasonably maintained, with fixes and/or refactorings where possible.</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce13" office:value-type="string" calcext:value-type="string">
+      <text:p>Mandatory</text:p>
+     </table:table-cell>
+     <table:table-cell table:style-name="ce13" table:number-columns-repeated="4"/>
+     <table:table-cell table:style-name="ce21" table:number-columns-repeated="2"/>
+     <table:table-cell table:style-name="ce13" table:number-columns-repeated="1012"/>
+    </table:table-row>
+    <table:table-row table:style-name="ro1" table:number-rows-repeated="1048548">
      <table:table-cell table:number-columns-repeated="1024"/>
     </table:table-row>
     <table:table-row table:style-name="ro1">