Impl turn timeouts, db entry timeouts
AI takes a players turn if they take too long on their turn (currently set to 25 seconds). Backend times out player/game entries in database.
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d851d90640
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c8eb6ab5be
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@ -1,7 +1,12 @@
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use crate::constants::{COLS, ROWS};
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use crate::state::{board_from_string, new_string_board, string_from_board, BoardState};
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use crate::ai::{get_ai_choice, AIDifficulty};
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use crate::constants::{
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COLS, GAME_CLEANUP_TIMEOUT, PLAYER_CLEANUP_TIMEOUT, PLAYER_COUNT_LIMIT, ROWS, TURN_SECONDS,
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};
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use crate::game_logic::check_win_draw;
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use crate::state::{board_from_string, new_string_board, string_from_board, BoardState, Turn};
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use std::sync::mpsc::{Receiver, SyncSender};
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use std::sync::mpsc::{Receiver, RecvTimeoutError, SyncSender};
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use std::time::Duration;
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use std::{fmt, thread};
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use rand::{thread_rng, Rng};
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@ -138,8 +143,10 @@ struct DBHandler {
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impl DBHandler {
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/// Returns true if should break out of outer loop
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fn handle_request(&mut self) -> bool {
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let rx_recv_result = self.rx.recv();
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if let Err(e) = rx_recv_result {
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let rx_recv_result = self.rx.recv_timeout(Duration::from_secs(1));
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if let Err(RecvTimeoutError::Timeout) = rx_recv_result {
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return false;
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} else if let Err(e) = rx_recv_result {
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println!("Failed to get DBHandlerRequest: {:?}", e);
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self.shutdown_tx.send(()).ok();
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return false;
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@ -158,7 +165,8 @@ impl DBHandler {
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let create_player_result = self.create_new_player(Some(&conn));
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if let Err(e) = create_player_result {
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println!("{}", e);
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return true;
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// don't stop server because player limit may have been reached
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return false;
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}
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let player_id = create_player_result.unwrap();
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@ -254,7 +262,7 @@ impl DBHandler {
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let result = conn.execute(
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"
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CREATE TABLE players (id INTEGER PRIMARY KEY NOT NULL,
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date_added TEXT NOT NULL,
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date_added TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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game_id INTEGER,
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FOREIGN KEY(game_id) REFERENCES games(id) ON DELETE CASCADE);
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",
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@ -273,9 +281,10 @@ impl DBHandler {
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CREATE TABLE games (id INTEGER PRIMARY KEY NOT NULL,
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cyan_player INTEGER UNIQUE,
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magenta_player INTEGER UNIQUE,
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date_added TEXT NOT NULL,
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date_added TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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board TEXT NOT NULL,
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status INTEGER NOT NULL,
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turn_time_start TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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FOREIGN KEY(cyan_player) REFERENCES players (id) ON DELETE SET NULL,
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FOREIGN KEY(magenta_player) REFERENCES players (id) ON DELETE SET NULL);
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",
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@ -300,6 +309,18 @@ impl DBHandler {
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}
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let conn = conn.unwrap();
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let row_result: Result<usize, _> =
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conn.query_row("SELECT count(id) FROM players;", [], |row| row.get(0));
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if let Ok(count) = row_result {
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if count > PLAYER_COUNT_LIMIT {
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return Err(String::from(
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"Player limit reached, cannot create new players",
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));
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}
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} else {
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return Err(String::from("Failed to get player count in db"));
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}
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let mut player_id: u32 = thread_rng().gen();
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loop {
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let exists_result = self.check_if_player_exists(Some(conn), player_id);
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@ -318,10 +339,7 @@ impl DBHandler {
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}
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}
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let insert_result = conn.execute(
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"INSERT INTO players (id, date_added) VALUES (?, datetime());",
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[player_id],
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);
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let insert_result = conn.execute("INSERT INTO players (id) VALUES (?);", [player_id]);
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if let Err(e) = insert_result {
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return Err(format!("Failed to insert player into db: {:?}", e));
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}
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@ -376,7 +394,7 @@ impl DBHandler {
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// TODO randomize players (or first-come-first-serve ok to do?)
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conn.execute(
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"INSERT INTO games (id, cyan_player, magenta_player, date_added, board, status) VALUES (?, ?, ?, datetime(), ?, 0);",
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"INSERT INTO games (id, cyan_player, magenta_player, board, status) VALUES (?, ?, ?, ?, 0);",
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params![game_id, players[0], players[1], new_string_board()]
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)
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.map_err(|e| format!("{:?}", e))?;
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@ -759,7 +777,7 @@ impl DBHandler {
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// update DB
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let update_result = if ended_state_opt.is_none() {
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conn.execute(
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"UPDATE games SET status = ?, board = ? FROM players WHERE players.game_id = games.id AND players.id = ?;",
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"UPDATE games SET status = ?, board = ?, turn_time_start = datetime() FROM players WHERE players.game_id = games.id AND players.id = ?;",
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params![if status == 0 { 1u8 }
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else { 0u8 },
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board_string,
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@ -799,6 +817,165 @@ impl DBHandler {
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Ok((DBPlaceStatus::Accepted, Some(board_string)))
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}
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}
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fn check_turn_times(&self) -> Result<(), String> {
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let conn = self.get_conn(DBFirstRun::NotFirstRun)?;
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let mut prepared_stmt = conn
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.prepare(
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"SELECT id, status, board FROM games WHERE unixepoch() - unixepoch(turn_time_start) > ? AND cyan_player NOTNULL and magenta_player NOTNULL AND status < 2;",
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)
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.map_err(|_| String::from("Failed to prepare db query based on turn time"))?;
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let rows = prepared_stmt
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.query_map([TURN_SECONDS], |row| {
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let id_result = row.get(0);
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let status_result = row.get(1);
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let board_result = row.get(2);
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if id_result.is_ok() && status_result.is_ok() && board_result.is_ok() {
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if let (Ok(id), Ok(status), Ok(board)) =
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(id_result, status_result, board_result)
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{
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Ok((id, status, board))
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} else {
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unreachable!();
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}
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} else if id_result.is_err() {
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id_result.map(|_| (0, 0, String::new()))
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} else if status_result.is_err() {
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status_result.map(|_| (0, 0, String::new()))
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} else {
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board_result.map(|_| (0, 0, String::new()))
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}
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})
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.map_err(|_| String::from("Failed to query db based on turn time"))?;
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for row_result in rows {
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if let Ok((id, status, board)) = row_result {
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self.have_ai_take_players_turn(Some(&conn), id, status, board)?;
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} else {
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unreachable!("This part should never execute");
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}
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}
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Ok(())
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}
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fn have_ai_take_players_turn(
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&self,
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conn: Option<&Connection>,
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game_id: u32,
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status: u32,
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board_string: String,
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) -> Result<(), String> {
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if status > 1 {
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return Err(String::from(
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"have_ai_take_players_turn: got invalid status",
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));
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}
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if conn.is_none() {
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return self.have_ai_take_players_turn(
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Some(&self.get_conn(DBFirstRun::NotFirstRun)?),
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game_id,
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status,
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board_string,
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);
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}
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let conn = conn.unwrap();
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let is_cyan = status == 0;
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let board = board_from_string(board_string);
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let mut ai_choice_pos: usize = get_ai_choice(
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AIDifficulty::Hard,
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if is_cyan {
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Turn::CyanPlayer
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} else {
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Turn::MagentaPlayer
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},
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&board,
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)
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.map_err(|_| String::from("Failed to get ai choice on turn timeout"))?
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.into();
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if board[ai_choice_pos].get() != BoardState::Empty {
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return Err(String::from("ai returned illegal move on turn timeout"));
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}
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// get final position of token
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loop {
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if board.len() <= ai_choice_pos + COLS as usize {
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break;
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} else if board[ai_choice_pos + COLS as usize].get() == BoardState::Empty {
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ai_choice_pos += COLS as usize;
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} else {
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break;
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}
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}
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// place token
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board[ai_choice_pos].replace(if is_cyan {
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BoardState::Cyan
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} else {
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BoardState::Magenta
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});
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// get board string from board while checking if game has ended
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let (board_string, end_state_opt) = string_from_board(board, ai_choice_pos);
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let state;
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if let Some(board_state) = end_state_opt {
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if board_state == BoardState::Empty {
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state = 4;
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} else if board_state.from_win() == BoardState::Cyan {
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state = 2;
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} else if board_state.from_win() == BoardState::Magenta {
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state = 3;
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} else {
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unreachable!();
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}
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} else {
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state = if is_cyan { 1 } else { 0 };
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}
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conn.execute(
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"UPDATE games SET board = ?, status = ?, turn_time_start = datetime() WHERE id = ?;",
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params![board_string, state, game_id],
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)
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.map_err(|_| String::from("Failed to update game with ai choice on turn timeout"))?;
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Ok(())
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}
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fn cleanup_stale_games(&self, conn: Option<&Connection>) -> Result<(), String> {
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if conn.is_none() {
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return self.cleanup_stale_games(Some(&self.get_conn(DBFirstRun::NotFirstRun)?));
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}
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let conn = conn.unwrap();
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conn.execute(
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"DELETE FROM games WHERE unixepoch() - unixepoch(date_added) > ?;",
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[GAME_CLEANUP_TIMEOUT],
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)
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.ok();
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Ok(())
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}
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fn cleanup_stale_players(&self, conn: Option<&Connection>) -> Result<(), String> {
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if conn.is_none() {
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return self.cleanup_stale_games(Some(&self.get_conn(DBFirstRun::NotFirstRun)?));
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}
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let conn = conn.unwrap();
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conn.execute(
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"DELETE FROM players WHERE unixepoch() - unixepoch(date_added) > ? AND game_id ISNULL;",
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[PLAYER_CLEANUP_TIMEOUT],
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)
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.ok();
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Ok(())
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}
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}
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pub fn start_db_handler_thread(
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@ -825,6 +1002,17 @@ pub fn start_db_handler_thread(
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handler.shutdown_tx.send(()).ok();
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break 'outer;
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}
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if let Err(e) = handler.check_turn_times() {
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println!("{}", e);
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}
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if let Err(e) = handler.cleanup_stale_games(None) {
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println!("{}", e);
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}
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if let Err(e) = handler.cleanup_stale_players(None) {
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println!("{}", e);
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}
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}
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});
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}
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@ -11,7 +11,7 @@ PRAGMA foreign_keys = ON;
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// fields should be self explanatory for the players table
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CREATE TABLE players (id INTEGER PRIMARY KEY NOT NULL,
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date_added TEXT NOT NULL,
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date_added TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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game_id INTEGER,
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FOREIGN KEY(game_id) REFERENCES games(id) ON DELETE CASCADE);
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@ -26,9 +26,10 @@ CREATE TABLE players (id INTEGER PRIMARY KEY NOT NULL,
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CREATE TABLE games (id INTEGER PRIMARY KEY NOT NULL,
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cyan_player INTEGER UNIQUE,
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magenta_player INTEGER UNIQUE,
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date_added TEXT NOT NULL,
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date_added TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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board TEXT NOT NULL,
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status INTEGER NOT NULL,
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turn_time_start TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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FOREIGN KEY(cyan_player) REFERENCES players (id) ON DELETE SET NULL,
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FOREIGN KEY(magenta_player) REFERENCES players (id) ON DELETE SET NULL);
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```
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@ -5,3 +5,8 @@ pub const INFO_TEXT_MAX_ITEMS: u32 = 100;
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pub const AI_EASY_MAX_CHOICES: usize = 5;
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pub const AI_NORMAL_MAX_CHOICES: usize = 3;
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pub const PLAYER_COUNT_LIMIT: usize = 1000;
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pub const TURN_SECONDS: u64 = 25;
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pub const GAME_CLEANUP_TIMEOUT: u64 = (TURN_SECONDS + 1) * ((ROWS * COLS) as u64 + 5u64);
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pub const PLAYER_CLEANUP_TIMEOUT: u64 = 300;
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