'update'
[vchess.git] / client / src / utils / storage.js
CommitLineData
6d01bb17 1import { extractTime } from "@/utils/timeControl";
ce87ac6a 2
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3// TODO: show game structure
4//const newItem = [
5// { gameId: "", players: [], timeControl: "", clocks: [] }
6//];
7
8function dbOperation(callback)
9{
10 let db = null;
11 let DBOpenRequest = window.indexedDB.open("vchess", 4);
12
13 DBOpenRequest.onerror = function(event) {
14 alert("Database error: " + event.target.errorCode);
15 };
16
17 DBOpenRequest.onsuccess = function(event) {
18 db = DBOpenRequest.result;
19 callback(db);
20 db.close();
21 };
22
23 DBOpenRequest.onupgradeneeded = function(event) {
24 let db = event.target.result;
25 db.onerror = function(event) {
26 alert("Error while loading database: " + event.target.errorCode);
27 };
28 // Create objectStore for vchess->games
29 db.createObjectStore("games", { keyPath: "gameId" });
30 }
31}
32
33// Optional callback to get error status
34function addGame(game, callback)
35{
36 dbOperation((db) => {
37 let transaction = db.transaction(["games"], "readwrite");
38 if (callback)
39 {
40 transaction.oncomplete = function() {
41 callback({}); //everything's fine
42 }
43 transaction.onerror = function() {
44 callback({errmsg: "addGame failed: " + transaction.error});
45 };
46 }
47 let objectStore = transaction.objectStore("games");
48 objectStore.add(game);
49 });
50}
51
52// Clear current live game from localStorage
53function clear() {
54 localStorage.deleteItem("gameInfo");
55 localStorage.deleteItem("gameState");
56}
57
58// Current live game:
59function getCurrent()
60{
61 return Object.assign({},
62 JSON.parse(localStorage.getItem("gameInfo")),
63 JSON.parse(localStorage.getItem("gameState")));
64}
65
66// Only called internally after a score update
67function transferToDb()
68{
69 addGame(getCurrent(), (err) => {
70 if (!!err.errmsg)
71 return err;
72 clear();
73 });
74}
75
d2634386 76export const GameStorage =
59d58d7d 77{
8f5780d8 78 // localStorage:
6d01bb17 79 init: function(o)
d2634386 80 {
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81 // Extract times (in [milli]seconds), set clocks, store in localStorage
82 const tc = extractTime(o.timeControl);
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83
84 // game infos: constant
85 const gameInfo =
86 {
87 gameId: o.gameId,
88 vname: o.vname,
8f5780d8 89 fenStart: o.fenStart,
4b0384fa 90 players: o.players,
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91 timeControl: o.timeControl,
92 increment: tc.increment,
93 mode: "live", //function for live games only
94 };
95
96 // game state: will be updated
97 const gameState =
98 {
99 fen: o.fenStart,
100 moves: [],
101 clocks: [...Array(o.players.length)].fill(tc.mainTime),
6ec161b9 102 initime: undefined,
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103 score: "*",
104 };
105
106 localStorage.setItem("gameInfo", JSON.stringify(gameInfo));
107 localStorage.setItem("gameState", JSON.stringify(gameState));
d2634386 108 },
59d58d7d 109
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110 getInitime: function()
111 {
112 const gameState = JSON.parse(localStorage.getItem("gameState"));
113 return gameState.initime;
114 },
115
8f5780d8 116 // localStorage:
6274a545 117 // TODO: also option to takeback a move ?
4c177b7f 118 // NOTE: for live games only (all on server for corr)
9d54ab89 119 update: function(o) //colorIdx, move, fen, elapsed, increment, initime, score
4c177b7f 120 {
8f5780d8 121 let gameState = JSON.parse(localStorage.getItem("gameState"));
6274a545 122 if (!!o.move)
4c177b7f 123 {
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124 gameState.moves.push(o.move);
125 gameState.fen = o.fen;
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126 if (!!o.elapsed) //NaN if first move in game
127 gameState.clocks[o.colorIdx] += (o.increment - o.elapsed);
4c177b7f 128 }
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129 if (!!o.initime) //just a flag (true)
130 gameState.initime = Date.now();
131 if (!!o.score)
132 gameState.score = o.score;
8f5780d8 133 localStorage.setItem("gameState", JSON.stringify(gameState));
6274a545 134 if (!!o.score && o.score != "*")
8f5780d8 135 transferToDb(); //game is over
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136 },
137
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138 // indexedDB:
139 // Since DB requests are asynchronous, require a callback using the result
140 // TODO: option for remote retrieval (third arg, or just "gameRef")
d6c1bf37 141 getLocal: function(gameId, callback)
d2634386 142 {
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143 let games = [];
144 dbOperation((db) => {
145 // TODO: if gameId is provided, limit search to gameId (just .get(gameId). ...)
146 let objectStore = db.transaction('games').objectStore('games');
147 objectStore.openCursor().onsuccess = function(event) {
148 var cursor = event.target.result;
9d54ab89 149 // if there is still another cursor to go, keep running this code
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150 if (cursor)
151 {
152 games.push(cursor.value);
153 cursor.continue();
154 }
155 else
156 callback(games);
157 }
158 });
d2634386 159 },
59d58d7d 160
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161 // Delete a game in indexedDB
162 remove: function(gameId, callback)
d2634386 163 {
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164 dbOperation((db) => {
165 let transaction = db.transaction(["games"], "readwrite");
166 if (callback)
167 {
168 transaction.oncomplete = function() {
169 callback({}); //everything's fine
170 }
171 transaction.onerror = function() {
6ec161b9 172 callback({errmsg: "game removal failed: " + transaction.error});
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173 };
174 }
175 transaction.objectStore("games").delete(gameId);
176 });
d2634386 177 },
59d58d7d 178
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179 // Retrieve any live game from its identifiers (remote or not, running or not)
180 // NOTE: need callback because result might be obtained asynchronously
181 get: function(gameRef, callback)
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182 {
183 const gid = gameRef.id;
184 const rid = gameRef.rid; //may be blank
8f5780d8 185 if (!!rid)
d2634386 186 {
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187 // TODO: send request to server which forward to user sid == rid,
188 // need to listen to "remote game" event in main hall ?
189 return callback({}); //means "the game will arrive later" (TODO...)
d2634386 190 }
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191
192 const gameInfoStr = localStorage.getItem("gameInfo");
193 if (gameInfoStr)
d2634386 194 {
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195 const gameInfo = JSON.parse(gameInfoStr);
196 if (gameInfo.gameId == gid)
197 {
198 const gameState = JSON.parse(localStorage.getItem("gameState"));
199 return callback(Object.assign({}, gameInfo, gameState));
200 }
d2634386 201 }
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202
203 // Game is local and not running
d6c1bf37 204 GameStorage.getLocal(gid, callback);
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205 },
206};