server/models/Game.js

   1 var 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     if (!g.vid.toString().match(/^[0-9]+$/))
  38       return "Wrong variant ID";
  39     if (!g.cadence.match(/^[0-9dhms +]+$/))
  40       return "Wrong characters in time control";
  41     if (!g.fen.match(/^[a-zA-Z0-9, /-]*$/))
  42       return "Bad FEN string";
  43     if (g.players.length != 2)
  44       return "Need exactly 2 players";
  45     if (g.players.some(p => !p.id.toString().match(/^[0-9]+$/)))
  46       return "Wrong characters in player ID";
  47     return "";
  48   },
  49
  50   create: function(vid, fen, cadence, players, cb)
  51   {
  52     db.serialize(function() {
  53       let query =
  54         "INSERT INTO Games " +
  55         "(vid, fenStart, fen, score, cadence, created, drawOffer) " +
  56         "VALUES " +
  57         "(" + vid + ",'" + fen + "','" + fen + "','*','" + cadence + "'," + Date.now() + ",'')";
  58       db.run(query, function(err) {
  59         if (!!err)
  60           return cb(err);
  61         players.forEach((p,idx) => {
  62           const color = (idx==0 ? "w" : "b");
  63           query =
  64             "INSERT INTO Players VALUES " +
  65             "(" + this.lastID + "," + p.id + ",'" + color + "')";
  66           db.run(query);
  67         });
  68         cb(null, {gid: this.lastID});
  69       });
  70     });
  71   },
  72
  73   // TODO: some queries here could be async
  74   getOne: function(id, light, cb)
  75   {
  76     db.serialize(function() {
  77       let query =
  78         // NOTE: g.scoreMsg can be NULL
  79         // (in this case score = "*" and no reason to look at it)
  80         "SELECT g.id, g.vid, g.fen, g.fenStart, g.cadence, g.created, g.score, " +
  81           "g.scoreMsg, g.drawOffer, v.name AS vname " +
  82         "FROM Games g " +
  83         "JOIN Variants v " +
  84         "  ON g.vid = v.id " +
  85         "WHERE g.id = " + id;
  86       db.get(query, (err,gameInfo) => {
  87         if (!!err)
  88           return cb(err);
  89         query =
  90           "SELECT p.uid, p.color, u.name " +
  91           "FROM Players p " +
  92           "JOIN Users u " +
  93           "  ON p.uid = u.id " +
  94           "WHERE p.gid = " + id;
  95         db.all(query, (err2,players) => {
  96           if (!!err2)
  97             return cb(err2);
  98           if (light)
  99           {
 100             const game = Object.assign({},
 101               gameInfo,
 102               {players: players}
 103             );
 104             return cb(null, game);
 105           }
 106           query =
 107             "SELECT squares, played, idx " +
 108             "FROM Moves " +
 109             "WHERE gid = " + id;
 110           db.all(query, (err3,moves) => {
 111             if (!!err3)
 112               return cb(err3);
 113             query =
 114               "SELECT msg, name, added " +
 115               "FROM Chats " +
 116               "WHERE gid = " + id;
 117             db.all(query, (err4,chats) => {
 118               if (!!err4)
 119                 return cb(err4);
 120               const game = Object.assign({},
 121                 gameInfo,
 122                 {
 123                   players: players,
 124                   moves: moves,
 125                   chats: chats,
 126                 }
 127               );
 128               return cb(null, game);
 129             });
 130           });
 131         });
 132       });
 133     });
 134   },
 135
 136   // For display on MyGames or Hall: no need for moves or chats
 137   getByUser: function(uid, excluded, cb)
 138   {
 139     db.serialize(function() {
 140       let query = "";
 141       if (uid == 0)
 142       {
 143         // Special case anonymous user: show all games
 144         query =
 145           "SELECT id AS gid " +
 146           "FROM Games";
 147       }
 148       else
 149       {
 150         // Registered user:
 151         query =
 152           "SELECT gid " +
 153           "FROM Players " +
 154           "GROUP BY gid " +
 155           "HAVING COUNT(uid = " + uid + " OR NULL) " +
 156           (excluded ? " = 0" : " > 0");
 157       }
 158       db.all(query, (err,gameIds) => {
 159         if (!!err || gameIds.length == 0)
 160           return cb(err, []);
 161         let gameArray = [];
 162         let kounter = 0;
 163         for (let i=0; i<gameIds.length; i++)
 164         {
 165           GameModel.getOne(gameIds[i]["gid"], true, (err2,game) => {
 166             if (!!err2)
 167               return cb(err2);
 168             gameArray.push(game);
 169             kounter++; //TODO: let's hope this is atomic?!
 170             // Call callback function only when gameArray is complete:
 171             if (kounter == gameIds.length)
 172               return cb(null, gameArray);
 173           });
 174         }
 175       });
 176     });
 177   },
 178
 179   getPlayers: function(id, cb)
 180   {
 181     db.serialize(function() {
 182       const query =
 183         "SELECT uid " +
 184         "FROM Players " +
 185         "WHERE gid = " + id;
 186       db.all(query, (err,players) => {
 187         return cb(err, players);
 188       });
 189     });
 190   },
 191
 192   checkGameUpdate: function(obj)
 193   {
 194     // Check all that is possible (required) in obj:
 195     if (!!obj.move)
 196     {
 197       if (!obj.move.played.toString().match(/^[0-9]+$/))
 198         return "Wrong move played time";
 199       if (!obj.move.idx.toString().match(/^[0-9]+$/))
 200         return "Wrong move index";
 201     }
 202     if (!!obj.drawOffer && !obj.drawOffer.match(/^[wbtn]$/))
 203       return "Wrong draw offer format";
 204     if (!!obj.fen && !obj.fen.match(/^[a-zA-Z0-9, /-]*$/))
 205       return "Wrong FEN string";
 206     if (!!obj.score && !obj.score.match(/^[012?*\/-]+$/))
 207       return "Wrong characters in score";
 208     if (!!obj.scoreMsg && !obj.scoreMsg.match(/^[a-zA-Z ]+$/))
 209       return "Wrong characters in score message";
 210     if (!!obj.chat)
 211       return UserModel.checkNameEmail({name: obj.chat.name});
 212     return "";
 213   },
 214
 215   // obj can have fields move, chat, fen, drawOffer and/or score
 216   update: function(id, obj)
 217   {
 218     db.parallelize(function() {
 219       let query =
 220         "UPDATE Games " +
 221         "SET ";
 222       let modifs = "";
 223       if (!!obj.message)
 224         modifs += "message = message || ' ' || '" + obj.message + "',";
 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       if (!!obj.move)
 246       {
 247         const m = obj.move;
 248         query =
 249           "INSERT INTO Moves (gid, squares, played, idx) VALUES " +
 250           "(" + id + ",?," + m.played + "," + m.idx + ")";
 251         db.run(query, JSON.stringify(m.squares));
 252       }
 253       if (!!obj.chat)
 254       {
 255         query =
 256           "INSERT INTO Chats (gid, msg, name, added) VALUES ("
 257             + id + ",?,'" + obj.chat.name + "'," + Date.now() + ")";
 258         db.run(query, obj.chat.msg);
 259       }
 260     });
 261   },
 262
 263   remove: function(id)
 264   {
 265     db.parallelize(function() {
 266       let query =
 267         "DELETE FROM Games " +
 268         "WHERE id = " + id;
 269       db.run(query);
 270       query =
 271         "DELETE FROM Players " +
 272         "WHERE gid = " + id;
 273       db.run(query);
 274       query =
 275         "DELETE FROM Moves " +
 276         "WHERE gid = " + id;
 277       db.run(query);
 278       query =
 279         "DELETE FROM Chats " +
 280         "WHERE gid = " + id;
 281       db.run(query);
 282     });
 283   },
 284
 285   cleanGamesDb: function()
 286   {
 287     const tsNow = Date.now();
 288     // 86400000 = 24 hours in milliseconds
 289     const day = 86400000;
 290     db.serialize(function() {
 291       let query =
 292         "SELECT id, created " +
 293         "FROM Games ";
 294       db.all(query, (err,games) => {
 295         games.forEach(g => {
 296           query =
 297             "SELECT count(*) as nbMoves, max(played) AS lastMaj " +
 298             "FROM Moves " +
 299             "WHERE gid = " + g.id;
 300           db.get(query, (err2,mstats) => {
 301             // Remove games still not really started,
 302             // with no action in the last 3 months:
 303             if ((mstats.nbMoves == 0 && tsNow - g.created > 91*day) ||
 304               (mstats.nbMoves == 1 && tsNow - mstats.lastMaj > 91*day))
 305             {
 306               GameModel.remove(g.id);
 307             }
 308           });
 309         });
 310       });
 311     });
 312   },
 313 }
 314
 315 module.exports = GameModel;