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, score, cadence, created, drawOffer) " +
  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, light, 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, 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           if (light)
  93           {
  94             const game = Object.assign({},
  95               gameInfo,
  96               {players: players}
  97             );
  98             cb(null, game);
  99           }
 100           else
 101           {
 102             // Full game requested:
 103             query =
 104               "SELECT squares, played, idx " +
 105               "FROM Moves " +
 106               "WHERE gid = " + id;
 107             db.all(query, (err3,moves) => {
 108               query =
 109                 "SELECT msg, name, added " +
 110                 "FROM Chats " +
 111                 "WHERE gid = " + id;
 112               db.all(query, (err4,chats) => {
 113                 const game = Object.assign({},
 114                   gameInfo,
 115                   {
 116                     players: players,
 117                     moves: moves,
 118                     chats: chats,
 119                   }
 120                 );
 121                 cb(null, game);
 122               });
 123             });
 124           }
 125         });
 126       });
 127     });
 128   },
 129
 130   // For display on MyGames or Hall: no need for moves or chats
 131   getByUser: function(uid, excluded, cb)
 132   {
 133     db.serialize(function() {
 134       let query = "";
 135       if (uid == 0)
 136       {
 137         // Special case anonymous user: show all games
 138         query =
 139           "SELECT id AS gid " +
 140           "FROM Games";
 141       }
 142       else
 143       {
 144         // Registered user:
 145         query =
 146           "SELECT gid " +
 147           "FROM Players " +
 148           "GROUP BY gid " +
 149           "HAVING COUNT(uid = " + uid + " OR NULL) " +
 150           (excluded ? " = 0" : " > 0");
 151       }
 152       db.all(query, (err,gameIds) => {
 153         if (err || gameIds.length == 0)
 154           cb(err, []);
 155         else
 156         {
 157           let gameArray = [];
 158           let gCounter = 0;
 159           for (let i=0; i<gameIds.length; i++)
 160           {
 161             GameModel.getOne(gameIds[i]["gid"], true, (err2,game) => {
 162               gameArray.push(game);
 163               gCounter++; //TODO: let's hope this is atomic?!
 164               // Call callback function only when gameArray is complete:
 165               if (gCounter == gameIds.length)
 166                 cb(null, gameArray);
 167             });
 168           }
 169         }
 170       });
 171     });
 172   },
 173
 174   getPlayers: function(id, cb)
 175   {
 176     db.serialize(function() {
 177       const query =
 178         "SELECT uid " +
 179         "FROM Players " +
 180         "WHERE gid = " + id;
 181       db.all(query, (err,players) => {
 182         return cb(err, players);
 183       });
 184     });
 185   },
 186
 187   checkGameUpdate: function(obj)
 188   {
 189     // Check all that is possible (required) in obj:
 190     return (
 191       (
 192         !obj.move || (
 193           obj.move.played.toString().match(/^[0-9]+$/) &&
 194           obj.move.idx.toString().match(/^[0-9]+$/)
 195         )
 196       ) && (
 197         !obj.drawOffer || obj.drawOffer.match(/^[wbtn]$/)
 198       ) && (
 199         !obj.fen || obj.fen.match(/^[a-zA-Z0-9, /-]*$/)
 200       ) && (
 201         !obj.score || obj.score.match(/^[012?*\/-]+$/)
 202       ) && (
 203         !obj.scoreMsg || obj.scoreMsg.match(/^[a-zA-Z ]+$/)
 204       ) && (
 205         !obj.chat || UserModel.checkNameEmail({name: obj.chat.name})
 206       )
 207     );
 208   },
 209
 210   // obj can have fields move, chat, fen, drawOffer and/or score + message
 211   update: function(id, obj, cb)
 212   {
 213     db.parallelize(function() {
 214       let query =
 215         "UPDATE Games " +
 216         "SET ";
 217       let modifs = "";
 218       // NOTE: if drawOffer is set, we should check that it's player's turn
 219       // A bit overcomplicated. Let's trust the client on that for now...
 220       if (obj.drawOffer)
 221       {
 222         if (obj.drawOffer == "n") //Special "None" update
 223           obj.drawOffer = "";
 224         modifs += "drawOffer = '" + obj.drawOffer + "',";
 225       }
 226       if (obj.fen)
 227         modifs += "fen = '" + obj.fen + "',";
 228       if (obj.score)
 229         modifs += "score = '" + obj.score + "',";
 230       if (obj.scoreMsg)
 231         modifs += "scoreMsg = '" + obj.scoreMsg + "',";
 232       modifs = modifs.slice(0,-1); //remove last comma
 233       if (modifs.length > 0)
 234       {
 235         query += modifs + " WHERE id = " + id;
 236         db.run(query);
 237       }
 238       let wrongMoveIndex = false;
 239       if (obj.move)
 240       {
 241         // Security: only update moves if index is right
 242         query =
 243           "SELECT MAX(idx) AS maxIdx " +
 244           "FROM Moves " +
 245           "WHERE gid = " + id;
 246         db.get(query, (err,ret) => {
 247           const m = obj.move;
 248           if (!ret.maxIdx || ret.maxIdx + 1 == m.idx) {
 249             query =
 250               "INSERT INTO Moves (gid, squares, played, idx) VALUES " +
 251               "(" + id + ",?," + m.played + "," + m.idx + ")";
 252             db.run(query, JSON.stringify(m.squares));
 253             cb(null);
 254           }
 255           else cb({errmsg:"Wrong move index"});
 256         });
 257       }
 258       else cb(null);
 259       if (obj.chat)
 260       {
 261         query =
 262           "INSERT INTO Chats (gid, msg, name, added) VALUES ("
 263             + id + ",?,'" + obj.chat.name + "'," + Date.now() + ")";
 264         db.run(query, obj.chat.msg);
 265       }
 266     });
 267   },
 268
 269   remove: function(id)
 270   {
 271     db.parallelize(function() {
 272       let query =
 273         "DELETE FROM Games " +
 274         "WHERE id = " + id;
 275       db.run(query);
 276       query =
 277         "DELETE FROM Players " +
 278         "WHERE gid = " + id;
 279       db.run(query);
 280       query =
 281         "DELETE FROM Moves " +
 282         "WHERE gid = " + id;
 283       db.run(query);
 284       query =
 285         "DELETE FROM Chats " +
 286         "WHERE gid = " + id;
 287       db.run(query);
 288     });
 289   },
 290
 291   cleanGamesDb: function()
 292   {
 293     const tsNow = Date.now();
 294     // 86400000 = 24 hours in milliseconds
 295     const day = 86400000;
 296     db.serialize(function() {
 297       let query =
 298         "SELECT id, created " +
 299         "FROM Games ";
 300       db.all(query, (err,games) => {
 301         games.forEach(g => {
 302           query =
 303             "SELECT count(*) as nbMoves, max(played) AS lastMaj " +
 304             "FROM Moves " +
 305             "WHERE gid = " + g.id;
 306           db.get(query, (err2,mstats) => {
 307             // Remove games still not really started,
 308             // with no action in the last 3 months:
 309             if ((mstats.nbMoves == 0 && tsNow - g.created > 91*day) ||
 310               (mstats.nbMoves == 1 && tsNow - mstats.lastMaj > 91*day))
 311             {
 312               GameModel.remove(g.id);
 313             }
 314           });
 315         });
 316       });
 317     });
 318   },
 319 }
 320
 321 module.exports = GameModel;