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EN605.607.81.SP22_ASDM_Project
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Refactorings and bug fixes 

Protocol was also updated to match the output from the backend.
Fixed "id" not returning as an integer from the backend.
This commit is contained in:
Stephen Seo 2022-04-01 17:17:42 +09:00
parent 8782a731bc
commit 0d9e35dd28
4 changed files with 99 additions and 35 deletions
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96
back_end/src/db_handler.rs
View File

@ -1,5 +1,5 @@
use crate::constants::{COLS, ROWS};
use crate::state::{BoardState, new_string_board, board_from_string, string_from_board};
use crate::state::{board_from_string, new_string_board, string_from_board, BoardState};
use std::sync::mpsc::{Receiver, SyncSender};
use std::{fmt, thread};
@ -64,14 +64,18 @@ impl From<i64> for DBGameState {
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum DBPlaceStatus {
Accepted,
GameEnded,
GameEndedDraw,
GameEndedCyanWon,
GameEndedMagentaWon,
}
impl fmt::Display for DBPlaceStatus {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
DBPlaceStatus::Accepted => write!(f, "accepted"),
DBPlaceStatus::GameEnded => write!(f, "game_ended"),
DBPlaceStatus::GameEndedDraw => write!(f, "game_ended_draw"),
DBPlaceStatus::GameEndedCyanWon => write!(f, "game_ended_cyan_won"),
DBPlaceStatus::GameEndedMagentaWon => write!(f, "game_ended_magenta_won"),
}
}
}
@ -512,17 +516,14 @@ impl DBHandler {
Ok((DBGameState::InternalError, None))
} else if cyan_opt.is_none() || magenta_opt.is_none() {
// One player disconnected
let player_remove_result = self.disconnect_player(Some(conn), player_id);
if player_remove_result.is_err() {
// Failed to disconnect remaining player
self.disconnect_player(Some(conn), player_id).ok();
// Remove the game(s) with disconnected players
if self.clear_empty_games(Some(conn)).is_err() {
Ok((DBGameState::InternalError, None))
} else if status == 2 || status == 3 {
Ok((DBGameState::from(status), Some(board)))
} else {
// Remove the game(s) with disconnected players
if self.clear_empty_games(Some(conn)).is_err() {
Ok((DBGameState::InternalError, None))
} else {
Ok((DBGameState::OpponentDisconnected, Some(board)))
}
Ok((DBGameState::OpponentDisconnected, Some(board)))
}
} else {
// Game in progress, or other state depending on "status"
@ -637,6 +638,10 @@ impl DBHandler {
if let (Ok(cyan_id_opt), Ok(magenta_id_opt)) = (cyan_id_result, magenta_id_result) {
if let (Some(cyan_id), Some(_magenta_id)) = (cyan_id_opt, magenta_id_opt) {
Ok(Ok((cyan_id == player_id, status, board)))
} else if (2..=4).contains(&status) {
// game has ended, don't return error
// first result will be safely ignored
Ok(Ok((false, status, board)))
} else {
Ok(Err(DBPlaceError::OpponentDisconnected))
}
@ -654,9 +659,8 @@ impl DBHandler {
// if opponent has disconnected, disconnect the remaining player as well
if let Err(DBPlaceError::OpponentDisconnected) = query_result {
if self.disconnect_player(Some(conn), player_id).is_err()
|| self.clear_empty_games(Some(conn)).is_err()
{
self.disconnect_player(Some(conn), player_id).ok();
if self.clear_empty_games(Some(conn)).is_err() {
return Err(DBPlaceError::InternalError);
}
}
@ -676,9 +680,29 @@ impl DBHandler {
return Err(DBPlaceError::NotYourTurn);
}
}
2 | 3 | 4 => {
// game over, cyan won, or magenta won, or draw
return Ok((DBPlaceStatus::GameEnded, Some(board_string)));
2 => {
// game over, cyan won
self.disconnect_player(Some(conn), player_id).ok();
if self.clear_empty_games(Some(conn)).is_err() {
return Err(DBPlaceError::InternalError);
}
return Ok((DBPlaceStatus::GameEndedCyanWon, Some(board_string)));
}
3 => {
// game over, magenta won
self.disconnect_player(Some(conn), player_id).ok();
if self.clear_empty_games(Some(conn)).is_err() {
return Err(DBPlaceError::InternalError);
}
return Ok((DBPlaceStatus::GameEndedMagentaWon, Some(board_string)));
}
4 => {
// game over, draw
self.disconnect_player(Some(conn), player_id).ok();
if self.clear_empty_games(Some(conn)).is_err() {
return Err(DBPlaceError::InternalError);
}
return Ok((DBPlaceStatus::GameEndedDraw, Some(board_string)));
}
_ => (),
}
@ -710,10 +734,28 @@ impl DBHandler {
}
// board back to string
let (board_string, ended) = string_from_board(board, final_pos);
let (board_string, ended_state_opt) = string_from_board(board, final_pos);
// update DB
let update_result = conn.execute("UPDATE games SET status = ?, board = ? FROM players WHERE players.game_id = games.id AND players.id = ?;" , params![if status == 0 { 1u8 } else { 0u8 }, board_string, player_id]);
let update_result = if ended_state_opt.is_none() {
conn.execute(
"UPDATE games SET status = ?, board = ? FROM players WHERE players.game_id = games.id AND players.id = ?;",
params![if status == 0 { 1u8 }
else { 0u8 },
board_string,
player_id]
)
} else {
conn.execute(
"UPDATE games SET status = ?, board = ? FROM players WHERE players.game_id = games.id AND players.id = ?;",
params![if ended_state_opt.unwrap() == BoardState::Empty { 4u8 }
else if ended_state_opt.unwrap() == BoardState::CyanWin { 2u8 }
else { 3u8 },
board_string,
player_id]
)
};
if let Err(_e) = update_result {
return Err(DBPlaceError::InternalError);
} else if let Ok(count) = update_result {
@ -722,9 +764,17 @@ impl DBHandler {
}
}
if ended {
if let Some(ended_state) = ended_state_opt {
self.disconnect_player(Some(conn), player_id).ok();
Ok((DBPlaceStatus::GameEnded, Some(board_string)))
Ok((
match ended_state {
BoardState::Empty => DBPlaceStatus::GameEndedDraw,
BoardState::Cyan | BoardState::Magenta => unreachable!(),
BoardState::CyanWin => DBPlaceStatus::GameEndedCyanWon,
BoardState::MagentaWin => DBPlaceStatus::GameEndedMagentaWon,
},
Some(board_string),
))
} else {
Ok((DBPlaceStatus::Accepted, Some(board_string)))
}
@ -758,5 +808,3 @@ pub fn start_db_handler_thread(
}
});
}

4
back_end/src/json_handlers.rs
View File

@ -36,13 +36,13 @@ fn handle_pairing_request(tx: SyncSender<DBHandlerRequest>) -> Result<String, St
if let Ok((pid, is_cyan_opt)) = player_rx.recv_timeout(DB_REQUEST_TIMEOUT) {
if let Some(is_cyan) = is_cyan_opt {
Ok(format!(
"{{\"type\":\"pairing_response\", \"id\": \"{}\", \"status\": \"paired\", \"color\": \"{}\"}}",
"{{\"type\":\"pairing_response\", \"id\": {}, \"status\": \"paired\", \"color\": \"{}\"}}",
pid,
if is_cyan { "cyan" } else { "magenta" }
))
} else {
Ok(format!(
"{{\"type\":\"pairing_response\", \"id\": \"{}\", \"status\": \"waiting\"}}",
"{{\"type\":\"pairing_response\", \"id\": {}, \"status\": \"waiting\"}}",
pid
))
}

6
backend_protocol_specification.md
View File

@ -104,8 +104,10 @@ then the back-end will respond with "too\_many\_players".
{
"type": "place_token",
"status": "not_paired_yet", // or "accepted", "illegal",
// "not_your_turn", "game_ended",
// "unknown_id"
// "not_your_turn", "game_ended_draw",
// "game_ended_cyan_won",
// "game_ended_magenta_won", "unknown_id"
"board": "abcdefg..." // see protocol 5 response for details
}
```

28
front_end/src/state.rs
View File

@ -1,9 +1,9 @@
use crate::ai::AIDifficulty;
use crate::game_logic::{WinType, check_win_draw};
use crate::constants::{ROWS, COLS};
use crate::constants::{COLS, ROWS};
use crate::game_logic::{check_win_draw, WinType};
use std::collections::hash_set::HashSet;
use std::cell::Cell;
use std::collections::hash_set::HashSet;
use std::fmt::Display;
use std::rc::Rc;
@ -324,14 +324,15 @@ pub fn board_from_string(board_string: String) -> BoardType {
board
}
/// Returns the board as a String, and true if the game has ended
pub fn string_from_board(board: BoardType, placed: usize) -> (String, bool) {
/// 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
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 {
if let Some((_board_state, win_type)) = win_opt {
match win_type {
WinType::Horizontal(pos) => {
for i in pos..(pos + 4) {
@ -386,5 +387,18 @@ pub fn string_from_board(board: BoardType, placed: usize) -> (String, bool) {
});
}
(board_string, is_full || !win_set.is_empty())
if is_full && win_set.is_empty() {
(board_string, Some(BoardState::Empty))
} else if !win_set.is_empty() {
(
board_string.clone(),
if board_string.chars().collect::<Vec<char>>()[*win_set.iter().next().unwrap()] == 'd' {
Some(BoardState::CyanWin)
} else {
Some(BoardState::MagentaWin)
},
)
} else {
(board_string, None)
}
}