Small fix

[vchess.git] / server / models / Game.js

var db = require("../utils/database");

/*
 * Structure table Games:
 *   id: game id (int)
 *   vid: integer (variant id)
 *   fenStart: varchar (initial position)
 *   fen: varchar (current position)
 *   timeControl: string
 *   score: varchar (result)
 *
 * Structure table Players:
 *   gid: ref game id
 *   uid: ref user id
 *   color: character
 *   rtime: real (remaining time)
 *
 * Structure table Moves:
 *   gid: ref game id
 *   move: varchar (description)
 *   message: text
 *   played: datetime
 *   idx: integer
 *   color: character
 */

const GameModel =
{
	create: function(vid, fen, timeControl, players, cb)
	{
		db.serialize(function() {
			let query =
				"INSERT INTO Games (vid, fenStart, score, timeControl) " +
				"VALUES (" + vid + ",'" + fen + "','*','" + timeControl + "')";
      db.run(query, function(err) {
        if (!!err)
          return cb(err);
        players.forEach((p,idx) => {
          const color = (idx==0 ? "w" : "b");
          query =
            "INSERT INTO Players VALUES " +
            // Remaining time = -1 means "unstarted"
            "(" + this.lastID + "," + p.id + ",'" + color + "', -1)";
          db.run(query);
        });
        cb(null, {gid: this.lastID});
			});
		});
	},

	// TODO: queries here could be async, and wait for all to complete
	getOne: function(id, cb)
	{
		db.serialize(function() {
			let query =
				"SELECT * " +
				"FROM Games " +
				"WHERE id = " + id;
			db.get(query, (err,gameInfo) => {
				if (!!err)
					return cb(err);
				query =
					"SELECT uid, color, rtime " +
					"FROM Players " +
					"WHERE gid = " + id;
				db.all(query, (err2,players) => {
					if (!!err2)
						return cb(err2);
					query =
						"SELECT move, message, played, idx, color " +
						"FROM Moves " +
						"WHERE gid = " + id;
					db.all(query, (err3,moves) => {
						if (!!err3)
							return cb(err3);
						const game = Object.assign({},
              gameInfo,
						  {
							  players: players,
							  moves: moves
              }
            );
						return cb(null, game);
					});
				});
			});
		});
	},

	getByUser: function(uid, excluded, cb)
	{
		db.serialize(function() {
			// Next query is fine because a player appear at most once in a game
			const query =
				"SELECT gid " +
				"FROM Players " +
				"WHERE uid " + (excluded ? "<>" : "=") + " " + uid;
			db.run(query, (err,gameIds) => {
				if (!!err)
					return cb(err);
        gameIds = gameIds || []; //might be empty
				let gameArray = [];
				gameIds.forEach(gidRow => {
					GameModel.getOne(gidRow["gid"], (err2,game) => {
						if (!!err2)
							return cb(err2);
						gameArray.push(game);
					});
				});
				return cb(null, gameArray);
			});
		});
	},

  getPlayers: function(id, cb)
  {
    db.serialize(function() {
      const query =
        "SELECT id " +
        "FROM Players " +
        "WHERE gid = " + id;
      db.all(query, (err,players) => {
        return cb(err, players);
      });
    });
  },

  // obj can have fields move, fen and/or score
  update: function(id, obj, cb)
  {
		db.serialize(function() {
      let query =
        "UPDATE Games " +
        "SET ";
      if (!!obj.move)
        query += "move = " + obj.move + ","; //TODO: already stringified?!
      if (!!obj.fen)
        query += "fen = " + obj.fen + ",";
      if (!!obj.score)
        query += "score = " + obj.score + ",";
      query = query.slice(0,-1); //remove last comma
      query += " WHERE gameId = " + id;
      db.run(query, (err) => {
        cb(err);
      });
    });
  },

	remove: function(id)
	{
		db.parallelize(function() {
			let query =
				"DELETE FROM Games " +
				"WHERE id = " + id;
			db.run(query);
			query =
				"DELETE FROM Players " +
				"WHERE gid = " + id;
			db.run(query);
			query =
				"DELETE FROM Moves " +
				"WHERE gid = " + id;
			db.run(query);
		});
	},
}

module.exports = GameModel;