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  *   created: datetime
  13  *   drawOffer: boolean
  14  *
  15  * Structure table Players:
  16  *   gid: ref game id
  17  *   uid: ref user id
  18  *   color: character
  19  *
  20  * Structure table Moves:
  21  *   gid: ref game id
  22  *   squares: varchar (description)
  23  *   played: datetime
  24  *   idx: integer
  25  *
  26  * Structure table Chats:
  27  *   gid: game id (int)
  28  *   msg: varchar
  29  *   name: varchar
  30  *   sid: varchar (socket ID when sending message)
  31  *   added: datetime
  32  */
  33
  34 const GameModel =
  35 {
  36   checkGameInfo: function(g) {
  37     if (!g.id.toString().match(/^[0-9]+$/))
  38       return "Wrong game ID";
  39     if (!g.vid.toString().match(/^[0-9]+$/))
  40       return "Wrong variant ID";
  41     if (!g.vname.match(/^[a-zA-Z0-9]+$/))
  42       return "Wrong variant name";
  43     if (!g.timeControl.match(/^[0-9dhms +]+$/))
  44       return "Wrong characters in time control";
  45     if (!g.fen.match(/^[a-zA-Z0-9, /-]*$/))
  46       return "Bad FEN string";
  47     if (g.players.length != 2)
  48       return "Need exactly 2 players";
  49     if (g.players.some(p => !p.id.toString().match(/^[0-9]+$/)))
  50       return "Wrong characters in player ID";
  51     return "";
  52   },
  53
  54     create: function(vid, fen, timeControl, players, cb)
  55     {
  56         db.serialize(function() {
  57             let query =
  58                 "INSERT INTO Games"
  59         + " (vid, fenStart, fen, score, timeControl, created, drawOffer)"
  60         + " VALUES (" + vid + ",'" + fen + "','" + fen + "','*','"
  61         + timeControl + "'," + Date.now() + "," + false + ")";
  62       db.run(query, function(err) {
  63         if (!!err)
  64           return cb(err);
  65         players.forEach((p,idx) => {
  66           const color = (idx==0 ? "w" : "b");
  67           query =
  68             "INSERT INTO Players VALUES " +
  69             "(" + this.lastID + "," + p.id + ",'" + color + "')";
  70           db.run(query);
  71         });
  72         cb(null, {gid: this.lastID});
  73             });
  74         });
  75     },
  76
  77     // TODO: queries here could be async, and wait for all to complete
  78     getOne: function(id, cb)
  79     {
  80         db.serialize(function() {
  81       // TODO: optimize queries?
  82             let query =
  83                 "SELECT g.id, g.vid, g.fen, g.fenStart, g.timeControl, g.score, " +
  84           "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, sid, 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.chat)
 187     {
 188       if (!obj.chat.sid.match(/^[a-zA-Z0-9]+$/))
 189         return "Wrong user SID";
 190       return UserModel.checkNameEmail({name: obj.chat.name});
 191     }
 192     return "";
 193   },
 194
 195   // obj can have fields move, chat, fen, drawOffer and/or score
 196   update: function(id, obj)
 197   {
 198         db.parallelize(function() {
 199       let query =
 200         "UPDATE Games " +
 201         "SET ";
 202       let modifs = "";
 203       if (!!obj.message)
 204         modifs += "message = message || ' ' || '" + obj.message + "',";
 205       if ([true,false].includes(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       modifs = modifs.slice(0,-1); //remove last comma
 212       if (modifs.length > 0)
 213       {
 214         query += modifs + " WHERE id = " + id;
 215         db.run(query);
 216       }
 217       if (!!obj.move)
 218       {
 219         const m = obj.move;
 220         query =
 221           "INSERT INTO Moves (gid, squares, played, idx) VALUES " +
 222           "(" + id + ",?," + m.played + "," + m.idx + ")";
 223         db.run(query, JSON.stringify(m.squares));
 224       }
 225       if (!!obj.chat)
 226       {
 227               query =
 228             "INSERT INTO Chats (gid, msg, name, sid, added) VALUES " +
 229             "(" + id + ",?,'" + obj.chat.name + "','"
 230             + obj.chat.sid + "'," + Date.now() + ")";
 231         db.run(query, obj.chat.msg);
 232       }
 233     });
 234   },
 235
 236     remove: function(id)
 237     {
 238         db.parallelize(function() {
 239             let query =
 240                 "DELETE FROM Games " +
 241                 "WHERE id = " + id;
 242             db.run(query);
 243             query =
 244                 "DELETE FROM Players " +
 245                 "WHERE gid = " + id;
 246             db.run(query);
 247             query =
 248                 "DELETE FROM Moves " +
 249                 "WHERE gid = " + id;
 250             db.run(query);
 251             query =
 252                 "DELETE FROM Chats " +
 253                 "WHERE gid = " + id;
 254             db.run(query);
 255         });
 256     },
 257
 258   cleanGamesDb: function()
 259   {
 260     const tsNow = Date.now();
 261     // 86400000 = 24 hours in milliseconds
 262     const day = 86400000;
 263     db.serialize(function() {
 264       let query =
 265         "SELECT id,score " +
 266         "FROM Games ";
 267       db.all(query, (err,games) => {
 268         games.forEach(g => {
 269           query =
 270             "SELECT max(played) AS lastMaj " +
 271             "FROM Moves " +
 272             "WHERE gid = " + g.id;
 273           db.get(query, (err2,updated) => {
 274             if (!updated && tsNow - g.created > 7*day)
 275               return GameModel.remove(g.id);
 276             const lastMaj = updated.lastMaj;
 277             if (g.score != "*" && tsNow - lastMaj > 7*day ||
 278               g.score == "*" && tsNow - lastMaj > 91*day)
 279             {
 280               GameModel.remove(g.id);
 281             }
 282           });
 283         });
 284       });
 285     });
 286   },
 287 }
 288
 289 module.exports = GameModel;