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             query =
  95               "SELECT COUNT(*) AS nbMoves " +
  96               "FROM Moves " +
  97               "WHERE gid = " + id;
  98             db.get(query, (err,ret) => {
  99               const game = Object.assign({},
 100                 gameInfo,
 101                 {players: players},
 102                 {movesCount: ret.nbMoves}
 103               );
 104               cb(null, game);
 105             });
 106           }
 107           else
 108           {
 109             // Full game requested:
 110             query =
 111               "SELECT squares, played, idx " +
 112               "FROM Moves " +
 113               "WHERE gid = " + id;
 114             db.all(query, (err3,moves) => {
 115               query =
 116                 "SELECT msg, name, added " +
 117                 "FROM Chats " +
 118                 "WHERE gid = " + id;
 119               db.all(query, (err4,chats) => {
 120                 const game = Object.assign({},
 121                   gameInfo,
 122                   {
 123                     players: players,
 124                     moves: moves,
 125                     chats: chats,
 126                   }
 127                 );
 128                 cb(null, game);
 129               });
 130             });
 131           }
 132         });
 133       });
 134     });
 135   },
 136
 137   // For display on MyGames or Hall: no need for moves or chats
 138   getByUser: function(uid, excluded, cb)
 139   {
 140     db.serialize(function() {
 141       let query = "";
 142       if (uid == 0)
 143       {
 144         // Special case anonymous user: show all games
 145         query =
 146           "SELECT id AS gid " +
 147           "FROM Games";
 148       }
 149       else
 150       {
 151         // Registered user:
 152         query =
 153           "SELECT gid " +
 154           "FROM Players " +
 155           "GROUP BY gid " +
 156           "HAVING COUNT(uid = " + uid + " OR NULL) " +
 157           (excluded ? " = 0" : " > 0");
 158       }
 159       db.all(query, (err,gameIds) => {
 160         if (err || gameIds.length == 0)
 161           cb(err, []);
 162         else
 163         {
 164           let gameArray = [];
 165           let gCounter = 0;
 166           for (let i=0; i<gameIds.length; i++)
 167           {
 168             GameModel.getOne(gameIds[i]["gid"], true, (err2,game) => {
 169               gameArray.push(game);
 170               gCounter++; //TODO: let's hope this is atomic?!
 171               // Call callback function only when gameArray is complete:
 172               if (gCounter == gameIds.length)
 173                 cb(null, gameArray);
 174             });
 175           }
 176         }
 177       });
 178     });
 179   },
 180
 181   getPlayers: function(id, cb)
 182   {
 183     db.serialize(function() {
 184       const query =
 185         "SELECT uid " +
 186         "FROM Players " +
 187         "WHERE gid = " + id;
 188       db.all(query, (err,players) => {
 189         return cb(err, players);
 190       });
 191     });
 192   },
 193
 194   checkGameUpdate: function(obj)
 195   {
 196     // Check all that is possible (required) in obj:
 197     return (
 198       (
 199         !obj.move || (
 200           !!(obj.move.played.toString().match(/^[0-9]+$/)) &&
 201           !!(obj.move.idx.toString().match(/^[0-9]+$/))
 202         )
 203       ) && (
 204         !obj.drawOffer || !!(obj.drawOffer.match(/^[wbtn]$/))
 205       ) && (
 206         !obj.fen || !!(obj.fen.match(/^[a-zA-Z0-9, /-]*$/))
 207       ) && (
 208         !obj.score || !!(obj.score.match(/^[012?*\/-]+$/))
 209       ) && (
 210         !obj.scoreMsg || !!(obj.scoreMsg.match(/^[a-zA-Z ]+$/))
 211       ) && (
 212         !obj.chat || UserModel.checkNameEmail({name: obj.chat.name})
 213       )
 214     );
 215   },
 216
 217   // obj can have fields move, chat, fen, drawOffer and/or score + message
 218   update: function(id, obj, cb)
 219   {
 220     db.parallelize(function() {
 221       let query =
 222         "UPDATE Games " +
 223         "SET ";
 224       let modifs = "";
 225       // NOTE: if drawOffer is set, we should check that it's player's turn
 226       // A bit overcomplicated. Let's trust the client on that for now...
 227       if (obj.drawOffer)
 228       {
 229         if (obj.drawOffer == "n") //Special "None" update
 230           obj.drawOffer = "";
 231         modifs += "drawOffer = '" + obj.drawOffer + "',";
 232       }
 233       if (obj.fen)
 234         modifs += "fen = '" + obj.fen + "',";
 235       if (obj.score)
 236         modifs += "score = '" + obj.score + "',";
 237       if (obj.scoreMsg)
 238         modifs += "scoreMsg = '" + obj.scoreMsg + "',";
 239       modifs = modifs.slice(0,-1); //remove last comma
 240       if (modifs.length > 0)
 241       {
 242         query += modifs + " WHERE id = " + id;
 243         db.run(query);
 244       }
 245       // NOTE: move, chat and delchat are mutually exclusive
 246       if (!!obj.move)
 247       {
 248         // Security: only update moves if index is right
 249         query =
 250           "SELECT MAX(idx) AS maxIdx " +
 251           "FROM Moves " +
 252           "WHERE gid = " + id;
 253         db.get(query, (err,ret) => {
 254           const m = obj.move;
 255           if (!ret.maxIdx || ret.maxIdx + 1 == m.idx) {
 256             query =
 257               "INSERT INTO Moves (gid, squares, played, idx) VALUES " +
 258               "(" + id + ",?," + m.played + "," + m.idx + ")";
 259             db.run(query, JSON.stringify(m.squares));
 260             cb(null);
 261           }
 262           else cb({errmsg:"Wrong move index"});
 263         });
 264       }
 265       else cb(null);
 266       if (obj.chat)
 267       {
 268         query =
 269           "INSERT INTO Chats (gid, msg, name, added) VALUES ("
 270             + id + ",?,'" + obj.chat.name + "'," + Date.now() + ")";
 271         db.run(query, obj.chat.msg);
 272       }
 273       else if (obj.delchat)
 274       {
 275         query =
 276           "DELETE " +
 277           "FROM Chats " +
 278           "WHERE gid = " + id;
 279         db.run(query);
 280       }
 281     });
 282   },
 283
 284   remove: function(id)
 285   {
 286     db.parallelize(function() {
 287       let query =
 288         "DELETE FROM Games " +
 289         "WHERE id = " + id;
 290       db.run(query);
 291       query =
 292         "DELETE FROM Players " +
 293         "WHERE gid = " + id;
 294       db.run(query);
 295       query =
 296         "DELETE FROM Moves " +
 297         "WHERE gid = " + id;
 298       db.run(query);
 299       query =
 300         "DELETE FROM Chats " +
 301         "WHERE gid = " + id;
 302       db.run(query);
 303     });
 304   },
 305
 306   cleanGamesDb: function()
 307   {
 308     const tsNow = Date.now();
 309     // 86400000 = 24 hours in milliseconds
 310     const day = 86400000;
 311     db.serialize(function() {
 312       let query =
 313         "SELECT id, created " +
 314         "FROM Games ";
 315       db.all(query, (err,games) => {
 316         games.forEach(g => {
 317           query =
 318             "SELECT count(*) as nbMoves, max(played) AS lastMaj " +
 319             "FROM Moves " +
 320             "WHERE gid = " + g.id;
 321           db.get(query, (err2,mstats) => {
 322             // Remove games still not really started,
 323             // with no action in the last 3 months:
 324             if ((mstats.nbMoves == 0 && tsNow - g.created > 91*day) ||
 325               (mstats.nbMoves == 1 && tsNow - mstats.lastMaj > 91*day))
 326             {
 327               GameModel.remove(g.id);
 328             }
 329           });
 330         });
 331       });
 332     });
 333   },
 334 }
 335
 336 module.exports = GameModel;