Complete GameStorage.update. TODO: move transmission
[vchess.git] / client / src / utils / storage.js
1 import { extractTime } from "@/utils/timeControl";
2
3 // TODO: show game structure
4 //const newItem = [
5 // { gameId: "", players: [], timeControl: "", clocks: [] }
6 //];
7
8 function 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
34 function 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
53 function clear() {
54 localStorage.deleteItem("gameInfo");
55 localStorage.deleteItem("gameState");
56 }
57
58 // Current live game:
59 function 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
67 function transferToDb()
68 {
69 addGame(getCurrent(), (err) => {
70 if (!!err.errmsg)
71 return err;
72 clear();
73 });
74 }
75
76 export const GameStorage =
77 {
78 // localStorage:
79 init: function(o)
80 {
81 // Extract times (in [milli]seconds), set clocks, store in localStorage
82 const tc = extractTime(o.timeControl);
83
84 // game infos: constant
85 const gameInfo =
86 {
87 gameId: o.gameId,
88 vname: o.vname,
89 fenStart: o.fenStart,
90 players: o.players,
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),
102 started: [...Array(o.players.length)].fill(false),
103 score: "*",
104 };
105
106 localStorage.setItem("gameInfo", JSON.stringify(gameInfo));
107 localStorage.setItem("gameState", JSON.stringify(gameState));
108 },
109
110 getInitime: function()
111 {
112 const gameState = JSON.parse(localStorage.getItem("gameState"));
113 return gameState.initime;
114 },
115
116 // localStorage:
117 // TODO: also option to takeback a move ?
118 // NOTE: for live games only (all on server for corr)
119 update: function(o) //colorIdx, move, fen, elapsed, increment, initime, score
120 {
121 let gameState = JSON.parse(localStorage.getItem("gameState"));
122 if (!!o.move)
123 {
124 gameState.moves.push(o.move);
125 gameState.fen = o.fen;
126 gameState.clocks[o.colorIdx] += (o.increment - o.elapsed);
127 }
128 if (!!o.initime) //just a flag (true)
129 gameState.initime = Date.now();
130 if (!!o.score)
131 gameState.score = o.score;
132 localStorage.setItem("gameState", JSON.stringify(gameState));
133 if (!!o.score && o.score != "*")
134 transferToDb(); //game is over
135 },
136
137 // indexedDB:
138 // Since DB requests are asynchronous, require a callback using the result
139 // TODO: option for remote retrieval (third arg, or just "gameRef")
140 getLocal: function(gameId, callback)
141 {
142 let games = [];
143 dbOperation((db) => {
144 // TODO: if gameId is provided, limit search to gameId (just .get(gameId). ...)
145 let objectStore = db.transaction('games').objectStore('games');
146 objectStore.openCursor().onsuccess = function(event) {
147 var cursor = event.target.result;
148 // if there is still another cursor to go, keep running this code
149 if (cursor)
150 {
151 games.push(cursor.value);
152 cursor.continue();
153 }
154 else
155 callback(games);
156 }
157 });
158 },
159
160 // Delete a game in indexedDB
161 remove: function(gameId, callback)
162 {
163 dbOperation((db) => {
164 let transaction = db.transaction(["games"], "readwrite");
165 if (callback)
166 {
167 transaction.oncomplete = function() {
168 callback({}); //everything's fine
169 }
170 transaction.onerror = function() {
171 callback({errmsg: "deleteGame failed: " + transaction.error});
172 };
173 }
174 transaction.objectStore("games").delete(gameId);
175 });
176 },
177
178 // Retrieve any live game from its identifiers (remote or not, running or not)
179 // NOTE: need callback because result might be obtained asynchronously
180 get: function(gameRef, callback)
181 {
182 const gid = gameRef.id;
183 const rid = gameRef.rid; //may be blank
184 if (!!rid)
185 {
186 // TODO: send request to server which forward to user sid == rid,
187 // need to listen to "remote game" event in main hall ?
188 return callback({}); //means "the game will arrive later" (TODO...)
189 }
190
191 const gameInfoStr = localStorage.getItem("gameInfo");
192 if (gameInfoStr)
193 {
194 const gameInfo = JSON.parse(gameInfoStr);
195 if (gameInfo.gameId == gid)
196 {
197 const gameState = JSON.parse(localStorage.getItem("gameState"));
198 return callback(Object.assign({}, gameInfo, gameState));
199 }
200 }
201
202 // Game is local and not running
203 GameStorage.getLocal(gid, callback);
204 },
205 };