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: boolean
  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.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         // NOTE: g.scoreMsg can be NULL
  84         // (in this case score = "*" and no reason to look at it)
  85                 "SELECT g.id, g.vid, g.fen, g.fenStart, g.timeControl, g.score, " +
  86           "g.scoreMsg, v.name AS vname " +
  87                 "FROM Games g " +
  88         "JOIN Variants v " +
  89         "  ON g.vid = v.id " +
  90                 "WHERE g.id = " + id;
  91             db.get(query, (err,gameInfo) => {
  92                 if (!!err)
  93                     return cb(err);
  94                 query =
  95                     "SELECT p.uid, p.color, u.name " +
  96                     "FROM Players p " +
  97           "JOIN Users u " +
  98           "  ON p.uid = u.id " +
  99                     "WHERE p.gid = " + id;
 100                 db.all(query, (err2,players) => {
 101                     if (!!err2)
 102                         return cb(err2);
 103                     query =
 104                         "SELECT squares, played, idx " +
 105                         "FROM Moves " +
 106                         "WHERE gid = " + id;
 107                     db.all(query, (err3,moves) => {
 108                         if (!!err3)
 109                             return cb(err3);
 110                   query =
 111               "SELECT msg, name, added " +
 112               "FROM Chats " +
 113               "WHERE gid = " + id;
 114                   db.all(query, (err4,chats) => {
 115                           if (!!err4)
 116                               return cb(err4);
 117                           const game = Object.assign({},
 118                 gameInfo,
 119                 {
 120                   players: players,
 121                   moves: moves,
 122                   chats: chats,
 123                 }
 124               );
 125                           return cb(null, game);
 126             });
 127                     });
 128                 });
 129             });
 130         });
 131     },
 132
 133     getByUser: function(uid, excluded, cb)
 134     {
 135         db.serialize(function() {
 136             // Next query is fine because a player appear at most once in a game
 137             const query =
 138                 "SELECT gid " +
 139                 "FROM Players " +
 140                 "WHERE uid " + (excluded ? "<>" : "=") + " " + uid;
 141             db.all(query, (err,gameIds) => {
 142                 if (!!err)
 143                     return cb(err);
 144         gameIds = gameIds || []; //might be empty
 145                 let gameArray = [];
 146                 for (let i=0; i<gameIds.length; i++)
 147                 {
 148                     GameModel.getOne(gameIds[i]["gid"], (err2,game) => {
 149                         if (!!err2)
 150                             return cb(err2);
 151                         gameArray.push(game);
 152                         // Call callback function only when gameArray is complete:
 153                         if (i == gameIds.length - 1)
 154                             return cb(null, gameArray);
 155                     });
 156                 }
 157             });
 158         });
 159     },
 160
 161   getPlayers: function(id, cb)
 162   {
 163     db.serialize(function() {
 164       const query =
 165         "SELECT id " +
 166         "FROM Players " +
 167         "WHERE gid = " + id;
 168       db.all(query, (err,players) => {
 169         return cb(err, players);
 170       });
 171     });
 172   },
 173
 174   checkGameUpdate: function(obj)
 175   {
 176     // Check all that is possible (required) in obj:
 177     if (!!obj.move)
 178     {
 179       if (!obj.move.played.toString().match(/^[0-9]+$/))
 180         return "Wrong move played time";
 181       if (!obj.move.idx.toString().match(/^[0-9]+$/))
 182         return "Wrong move index";
 183     }
 184     if (!!obj.fen && !obj.fen.match(/^[a-zA-Z0-9, /-]*$/))
 185       return "Wrong FEN string";
 186     if (!!obj.score && !obj.score.match(/^[012?*\/-]+$/))
 187       return "Wrong characters in score";
 188     if (!!obj.scoreMsg && !obj.scoreMsg.match(/^[a-zA-Z ]+$/))
 189       return "Wrong characters in score message";
 190     if (!!obj.chat)
 191       return UserModel.checkNameEmail({name: obj.chat.name});
 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       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;