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  *   timeControl: 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]+$/))
  38       return "Wrong variant ID";
  39     if (!g.vname.match(/^[a-zA-Z0-9]+$/))
  40       return "Wrong variant name";
  41     if (!g.timeControl.match(/^[0-9dhms +]+$/))
  42       return "Wrong characters in time control";
  43     if (!g.fen.match(/^[a-zA-Z0-9, /-]*$/))
  44       return "Bad FEN string";
  45     if (g.players.length != 2)
  46       return "Need exactly 2 players";
  47     if (g.players.some(p => !p.id.toString().match(/^[0-9]+$/)))
  48       return "Wrong characters in player ID";
  49     return "";
  50   },
  51
  52   create: function(vid, fen, timeControl, players, cb)
  53   {
  54     db.serialize(function() {
  55       let query =
  56         "INSERT INTO Games"
  57         + " (vid, fenStart, fen, score, timeControl, created, drawOffer)"
  58         + " VALUES (" + vid + ",'" + fen + "','" + fen + "','*','"
  59         + timeControl + "'," + Date.now() + ",'')";
  60       db.run(query, function(err) {
  61         if (!!err)
  62           return cb(err);
  63         players.forEach((p,idx) => {
  64           const color = (idx==0 ? "w" : "b");
  65           query =
  66             "INSERT INTO Players VALUES " +
  67             "(" + this.lastID + "," + p.id + ",'" + color + "')";
  68           db.run(query);
  69         });
  70         cb(null, {gid: this.lastID});
  71       });
  72     });
  73   },
  74
  75   // TODO: queries here could be async, and wait for all to complete
  76   getOne: function(id, cb)
  77   {
  78     db.serialize(function() {
  79       // TODO: optimize queries?
  80       let query =
  81         // NOTE: g.scoreMsg can be NULL
  82         // (in this case score = "*" and no reason to look at it)
  83         "SELECT g.id, g.vid, g.fen, g.fenStart, g.timeControl, g.score, " +
  84           "g.scoreMsg, v.name AS vname " +
  85         "FROM Games g " +
  86         "JOIN Variants v " +
  87         "  ON g.vid = v.id " +
  88         "WHERE g.id = " + id;
  89       db.get(query, (err,gameInfo) => {
  90         if (!!err)
  91           return cb(err);
  92         query =
  93           "SELECT p.uid, p.color, u.name " +
  94           "FROM Players p " +
  95           "JOIN Users u " +
  96           "  ON p.uid = u.id " +
  97           "WHERE p.gid = " + id;
  98         db.all(query, (err2,players) => {
  99           if (!!err2)
 100             return cb(err2);
 101           query =
 102             "SELECT squares, played, idx " +
 103             "FROM Moves " +
 104             "WHERE gid = " + id;
 105           db.all(query, (err3,moves) => {
 106             if (!!err3)
 107               return cb(err3);
 108             query =
 109               "SELECT msg, name, added " +
 110               "FROM Chats " +
 111               "WHERE gid = " + id;
 112             db.all(query, (err4,chats) => {
 113               if (!!err4)
 114                 return cb(err4);
 115               const game = Object.assign({},
 116                 gameInfo,
 117                 {
 118                   players: players,
 119                   moves: moves,
 120                   chats: chats,
 121                 }
 122               );
 123               return cb(null, game);
 124             });
 125           });
 126         });
 127       });
 128     });
 129   },
 130
 131   getByUser: function(uid, excluded, cb)
 132   {
 133     db.serialize(function() {
 134       // Next query is fine because a player appear at most once in a game
 135       const query =
 136         "SELECT gid " +
 137         "FROM Players " +
 138         "WHERE uid " + (excluded ? "<>" : "=") + " " + uid;
 139       db.all(query, (err,gameIds) => {
 140         if (!!err)
 141           return cb(err);
 142         gameIds = gameIds || []; //might be empty
 143         let gameArray = [];
 144         for (let i=0; i<gameIds.length; i++)
 145         {
 146           GameModel.getOne(gameIds[i]["gid"], (err2,game) => {
 147             if (!!err2)
 148               return cb(err2);
 149             gameArray.push(game);
 150             // Call callback function only when gameArray is complete:
 151             if (i == gameIds.length - 1)
 152               return cb(null, gameArray);
 153           });
 154         }
 155       });
 156     });
 157   },
 158
 159   getPlayers: function(id, cb)
 160   {
 161     db.serialize(function() {
 162       const query =
 163         "SELECT id " +
 164         "FROM Players " +
 165         "WHERE gid = " + id;
 166       db.all(query, (err,players) => {
 167         return cb(err, players);
 168       });
 169     });
 170   },
 171
 172   checkGameUpdate: function(obj)
 173   {
 174     // Check all that is possible (required) in obj:
 175     if (!!obj.move)
 176     {
 177       if (!obj.move.played.toString().match(/^[0-9]+$/))
 178         return "Wrong move played time";
 179       if (!obj.move.idx.toString().match(/^[0-9]+$/))
 180         return "Wrong move index";
 181     }
 182     if (!!obj.fen && !obj.fen.match(/^[a-zA-Z0-9, /-]*$/))
 183       return "Wrong FEN string";
 184     if (!!obj.score && !obj.score.match(/^[012?*\/-]+$/))
 185       return "Wrong characters in score";
 186     if (!!obj.scoreMsg && !obj.scoreMsg.match(/^[a-zA-Z ]+$/))
 187       return "Wrong characters in score message";
 188     if (!!obj.chat)
 189       return UserModel.checkNameEmail({name: obj.chat.name});
 190     return "";
 191   },
 192
 193   // obj can have fields move, chat, fen, drawOffer and/or score
 194   update: function(id, obj)
 195   {
 196     db.parallelize(function() {
 197       let query =
 198         "UPDATE Games " +
 199         "SET ";
 200       let modifs = "";
 201       if (!!obj.message)
 202         modifs += "message = message || ' ' || '" + obj.message + "',";
 203       // NOTE: if drawOffer is true, we should check that it's player's turn
 204       // A bit overcomplicated. Let's trust the client on that for now...
 205       if (!!obj.drawOffer)
 206         modifs += "drawOffer = " + obj.drawOffer + ",";
 207       if (!!obj.fen)
 208         modifs += "fen = '" + obj.fen + "',";
 209       if (!!obj.score)
 210         modifs += "score = '" + obj.score + "',";
 211       if (!!obj.scoreMsg)
 212         modifs += "scoreMsg = '" + obj.scoreMsg + "',";
 213       modifs = modifs.slice(0,-1); //remove last comma
 214       if (modifs.length > 0)
 215       {
 216         query += modifs + " WHERE id = " + id;
 217         db.run(query);
 218       }
 219       if (!!obj.move)
 220       {
 221         const m = obj.move;
 222         query =
 223           "INSERT INTO Moves (gid, squares, played, idx) VALUES " +
 224           "(" + id + ",?," + m.played + "," + m.idx + ")";
 225         db.run(query, JSON.stringify(m.squares));
 226       }
 227       if (!!obj.chat)
 228       {
 229         query =
 230           "INSERT INTO Chats (gid, msg, name, added) VALUES ("
 231             + id + ",?,'" + obj.chat.name + "'," + Date.now() + ")";
 232         db.run(query, obj.chat.msg);
 233       }
 234     });
 235   },
 236
 237   remove: function(id)
 238   {
 239     db.parallelize(function() {
 240       let query =
 241         "DELETE FROM Games " +
 242         "WHERE id = " + id;
 243       db.run(query);
 244       query =
 245         "DELETE FROM Players " +
 246         "WHERE gid = " + id;
 247       db.run(query);
 248       query =
 249         "DELETE FROM Moves " +
 250         "WHERE gid = " + id;
 251       db.run(query);
 252       query =
 253         "DELETE FROM Chats " +
 254         "WHERE gid = " + id;
 255       db.run(query);
 256     });
 257   },
 258
 259   cleanGamesDb: function()
 260   {
 261     const tsNow = Date.now();
 262     // 86400000 = 24 hours in milliseconds
 263     const day = 86400000;
 264     db.serialize(function() {
 265       let query =
 266         "SELECT id,score " +
 267         "FROM Games ";
 268       db.all(query, (err,games) => {
 269         games.forEach(g => {
 270           query =
 271             "SELECT max(played) AS lastMaj " +
 272             "FROM Moves " +
 273             "WHERE gid = " + g.id;
 274           db.get(query, (err2,updated) => {
 275             if (!updated && tsNow - g.created > 7*day)
 276               return GameModel.remove(g.id);
 277             const lastMaj = updated.lastMaj;
 278             if (g.score != "*" && tsNow - lastMaj > 7*day ||
 279               g.score == "*" && tsNow - lastMaj > 91*day)
 280             {
 281               GameModel.remove(g.id);
 282             }
 283           });
 284         });
 285       });
 286     });
 287   },
 288 }
 289
 290 module.exports = GameModel;