server/models/Game.js

   1 const db = require("../utils/database");
   2 const UserModel = require("./User");
   3
   4 /*
   5  * Structure table Games:
   6  *   id: game id (int)
   7  *   vid: integer (variant id)
   8  *   fenStart: varchar (initial position)
   9  *   fen: varchar (current position)
  10  *   cadence: string
  11  *   score: varchar (result)
  12  *   scoreMsg: varchar ("Time", "Mutual agreement"...)
  13  *   created: datetime
  14  *   drawOffer: char ('w','b' or '' for none)
  15  *
  16  * Structure table Players:
  17  *   gid: ref game id
  18  *   uid: ref user id
  19  *   color: character
  20  *
  21  * Structure table Moves:
  22  *   gid: ref game id
  23  *   squares: varchar (description)
  24  *   played: datetime
  25  *   idx: integer
  26  *
  27  * Structure table Chats:
  28  *   gid: game id (int)
  29  *   msg: varchar
  30  *   name: varchar
  31  *   added: datetime
  32  */
  33
  34 const GameModel =
  35 {
  36   checkGameInfo: function(g) {
  37     return (
  38       g.vid.toString().match(/^[0-9]+$/) &&
  39       g.cadence.match(/^[0-9dhms +]+$/) &&
  40       g.fen.match(/^[a-zA-Z0-9, /-]*$/) &&
  41       g.players.length == 2 &&
  42       g.players.every(p => p.id.toString().match(/^[0-9]+$/))
  43     );
  44   },
  45
  46   create: function(vid, fen, cadence, players, cb)
  47   {
  48     db.serialize(function() {
  49       let query =
  50         "INSERT INTO Games " +
  51         "(vid, fenStart, fen, cadence, created) " +
  52         "VALUES " +
  53         "(" + vid + ",'" + fen + "','" + fen + "','" + cadence + "'," + Date.now() + ")";
  54       db.run(query, function(err) {
  55         if (err)
  56           cb(err)
  57         else
  58         {
  59           players.forEach((p,idx) => {
  60             const color = (idx==0 ? "w" : "b");
  61             query =
  62               "INSERT INTO Players VALUES " +
  63               "(" + this.lastID + "," + p.id + ",'" + color + "')";
  64             db.run(query);
  65           });
  66           cb(null, {gid: this.lastID});
  67         }
  68       });
  69     });
  70   },
  71
  72   // TODO: some queries here could be async
  73   getOne: function(id, cb)
  74   {
  75     // NOTE: ignoring errors (shouldn't happen at this stage)
  76     db.serialize(function() {
  77       let query =
  78         "SELECT g.id, g.vid, g.fen, g.fenStart, g.cadence, g.created, g.score, " +
  79           "g.scoreMsg, g.drawOffer, g.rematchOffer, v.name AS vname " +
  80         "FROM Games g " +
  81         "JOIN Variants v " +
  82         "  ON g.vid = v.id " +
  83         "WHERE g.id = " + id;
  84       db.get(query, (err, gameInfo) => {
  85         query =
  86           "SELECT p.uid, p.color, u.name " +
  87           "FROM Players p " +
  88           "JOIN Users u " +
  89           "  ON p.uid = u.id " +
  90           "WHERE p.gid = " + id;
  91         db.all(query, (err2, players) => {
  92           query =
  93             "SELECT squares, played, idx " +
  94             "FROM Moves " +
  95             "WHERE gid = " + id;
  96           db.all(query, (err3, moves) => {
  97             query =
  98               "SELECT msg, name, added " +
  99               "FROM Chats " +
 100               "WHERE gid = " + id;
 101             db.all(query, (err4, chats) => {
 102               const game = Object.assign({},
 103                 gameInfo,
 104                 {
 105                   players: players,
 106                   moves: moves,
 107                   chats: chats,
 108                 }
 109               );
 110               cb(null, game);
 111             });
 112           });
 113         });
 114       });
 115     });
 116   },
 117
 118   // For display on MyGames or Hall: no need for moves or chats
 119   getByUser: function(uid, excluded, cb)
 120   {
 121     // Some fields are not required when showing a games list:
 122     const getOneLight = (id, cb2) => {
 123       let query =
 124         "SELECT g.id, g.vid, g.fen, g.cadence, g.created, g.score, " +
 125           "g.scoreMsg, g.deletedByWhite, g.deletedByBlack, v.name AS vname " +
 126         "FROM Games g " +
 127         "JOIN Variants v " +
 128         "  ON g.vid = v.id " +
 129         "WHERE g.id = " + id;
 130       db.get(query, (err, gameInfo) => {
 131         query =
 132           "SELECT p.uid, p.color, u.name " +
 133           "FROM Players p " +
 134           "JOIN Users u " +
 135           "  ON p.uid = u.id " +
 136           "WHERE p.gid = " + id;
 137         db.all(query, (err2, players) => {
 138           query =
 139             "SELECT COUNT(*) AS nbMoves " +
 140             "FROM Moves " +
 141             "WHERE gid = " + id;
 142           db.get(query, (err,ret) => {
 143             const game = Object.assign({},
 144               gameInfo,
 145               {
 146                 players: players,
 147                 movesCount: ret.nbMoves
 148               }
 149             );
 150             cb2(game);
 151           });
 152         });
 153       });
 154     };
 155     db.serialize(function() {
 156       let query = "";
 157       if (uid == 0) {
 158         // Special case anonymous user: show all games
 159         query =
 160           "SELECT id AS gid " +
 161           "FROM Games";
 162       }
 163       else {
 164         // Registered user:
 165         query =
 166           "SELECT gid " +
 167           "FROM Players " +
 168           "GROUP BY gid " +
 169           "HAVING COUNT(uid = " + uid + " OR NULL) " +
 170           (excluded ? " = 0" : " > 0");
 171       }
 172       db.all(query, (err,gameIds) => {
 173         if (err || gameIds.length == 0) cb(err, []);
 174         else {
 175           let gameArray = [];
 176           let gCounter = 0;
 177           for (let i=0; i<gameIds.length; i++) {
 178             getOneLight(gameIds[i]["gid"], (game) => {
 179               gameArray.push(game);
 180               gCounter++; //TODO: let's hope this is atomic?!
 181               // Call callback function only when gameArray is complete:
 182               if (gCounter == gameIds.length)
 183                 cb(null, gameArray);
 184             });
 185           }
 186         }
 187       });
 188     });
 189   },
 190
 191   getPlayers: function(id, cb)
 192   {
 193     db.serialize(function() {
 194       const query =
 195         "SELECT uid " +
 196         "FROM Players " +
 197         "WHERE gid = " + id;
 198       db.all(query, (err,players) => {
 199         return cb(err, players);
 200       });
 201     });
 202   },
 203
 204   checkGameUpdate: function(obj)
 205   {
 206     // Check all that is possible (required) in obj:
 207     return (
 208       (
 209         !obj.move || (
 210           !!(obj.move.played.toString().match(/^[0-9]+$/)) &&
 211           !!(obj.move.idx.toString().match(/^[0-9]+$/))
 212         )
 213       ) && (
 214         !obj.drawOffer || !!(obj.drawOffer.match(/^[wbtn]$/))
 215       ) && (
 216         !obj.fen || !!(obj.fen.match(/^[a-zA-Z0-9, /-]*$/))
 217       ) && (
 218         !obj.score || !!(obj.score.match(/^[012?*\/-]+$/))
 219       ) && (
 220         !obj.scoreMsg || !!(obj.scoreMsg.match(/^[a-zA-Z ]+$/))
 221       ) && (
 222         !obj.chat || UserModel.checkNameEmail({name: obj.chat.name})
 223       )
 224     );
 225   },
 226
 227   // obj can have fields move, chat, fen, drawOffer and/or score + message
 228   update: function(id, obj, cb)
 229   {
 230     db.parallelize(function() {
 231       let query =
 232         "UPDATE Games " +
 233         "SET ";
 234       let modifs = "";
 235       // NOTE: if drawOffer is set, we should check that it's player's turn
 236       // A bit overcomplicated. Let's trust the client on that for now...
 237       if (obj.drawOffer)
 238       {
 239         if (obj.drawOffer == "n") //Special "None" update
 240           obj.drawOffer = "";
 241         modifs += "drawOffer = '" + obj.drawOffer + "',";
 242       }
 243       if (!!obj.fen)
 244         modifs += "fen = '" + obj.fen + "',";
 245       if (!!obj.score)
 246         modifs += "score = '" + obj.score + "',";
 247       if (!!obj.scoreMsg)
 248         modifs += "scoreMsg = '" + obj.scoreMsg + "',";
 249       if (!!obj.deletedBy) {
 250         const myColor = obj.deletedBy == 'w' ? "White" : "Black";
 251         modifs += "deletedBy" + myColor + " = true,";
 252       }
 253       modifs = modifs.slice(0,-1); //remove last comma
 254       if (modifs.length > 0)
 255       {
 256         query += modifs + " WHERE id = " + id;
 257         db.run(query);
 258       }
 259       // NOTE: move, chat and delchat are mutually exclusive
 260       if (!!obj.move)
 261       {
 262         // Security: only update moves if index is right
 263         query =
 264           "SELECT MAX(idx) AS maxIdx " +
 265           "FROM Moves " +
 266           "WHERE gid = " + id;
 267         db.get(query, (err,ret) => {
 268           const m = obj.move;
 269           if (!ret.maxIdx || ret.maxIdx + 1 == m.idx) {
 270             query =
 271               "INSERT INTO Moves (gid, squares, played, idx) VALUES " +
 272               "(" + id + ",?," + m.played + "," + m.idx + ")";
 273             db.run(query, JSON.stringify(m.squares));
 274             cb(null);
 275           }
 276           else cb({errmsg:"Wrong move index"});
 277         });
 278       }
 279       else cb(null);
 280       if (!!obj.chat)
 281       {
 282         query =
 283           "INSERT INTO Chats (gid, msg, name, added) VALUES ("
 284             + id + ",?,'" + obj.chat.name + "'," + Date.now() + ")";
 285         db.run(query, obj.chat.msg);
 286       }
 287       else if (obj.delchat)
 288       {
 289         query =
 290           "DELETE " +
 291           "FROM Chats " +
 292           "WHERE gid = " + id;
 293         db.run(query);
 294       }
 295       if (!!obj.deletedBy) {
 296         // Did my opponent delete it too?
 297         let selection =
 298           "deletedBy" +
 299           (obj.deletedBy == 'w' ? "Black" : "White") +
 300           " AS deletedByOpp";
 301         query =
 302           "SELECT " + selection + " " +
 303           "FROM Games " +
 304           "WHERE id = " + id;
 305         db.get(query, (err,ret) => {
 306           // If yes: just remove game
 307           if (!!ret.deletedByOpp) GameModel.remove(id);
 308         });
 309       }
 310     });
 311   },
 312
 313   remove: function(id)
 314   {
 315     db.parallelize(function() {
 316       let query =
 317         "DELETE FROM Games " +
 318         "WHERE id = " + id;
 319       db.run(query);
 320       query =
 321         "DELETE FROM Players " +
 322         "WHERE gid = " + id;
 323       db.run(query);
 324       query =
 325         "DELETE FROM Moves " +
 326         "WHERE gid = " + id;
 327       db.run(query);
 328       query =
 329         "DELETE FROM Chats " +
 330         "WHERE gid = " + id;
 331       db.run(query);
 332     });
 333   },
 334
 335   cleanGamesDb: function()
 336   {
 337     const tsNow = Date.now();
 338     // 86400000 = 24 hours in milliseconds
 339     const day = 86400000;
 340     db.serialize(function() {
 341       let query =
 342         "SELECT id, created " +
 343         "FROM Games ";
 344       db.all(query, (err,games) => {
 345         games.forEach(g => {
 346           query =
 347             "SELECT count(*) as nbMoves, max(played) AS lastMaj " +
 348             "FROM Moves " +
 349             "WHERE gid = " + g.id;
 350           db.get(query, (err2,mstats) => {
 351             // Remove games still not really started,
 352             // with no action in the last 3 months:
 353             if ((mstats.nbMoves == 0 && tsNow - g.created > 91*day) ||
 354               (mstats.nbMoves == 1 && tsNow - mstats.lastMaj > 91*day))
 355             {
 356               GameModel.remove(g.id);
 357             }
 358           });
 359         });
 360       });
 361     });
 362   },
 363 }
 364
 365 module.exports = GameModel;