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967a2686 BA |
1 | // Game object: { |
2 | // // Static informations: | |
3 | // gameId: string | |
4 | // vname: string, | |
5 | // fenStart: string, | |
6 | // players: array of sid+id+name, | |
7 | // timeControl: string, | |
8 | // increment: integer (seconds), | |
9 | // mode: string ("live" or "corr") | |
10 | // imported: boolean (optional, default false) | |
11 | // // Game (dynamic) state: | |
12 | // fen: string, | |
13 | // moves: array of Move objects, | |
14 | // clocks: array of integers, | |
809ba2aa | 15 | // initime: array of integers (when clock start running), |
967a2686 BA |
16 | // score: string (several options; '*' == running), |
17 | // } | |
18 | ||
19 | function dbOperation(callback) | |
20 | { | |
21 | let db = null; | |
22 | let DBOpenRequest = window.indexedDB.open("vchess", 4); | |
23 | ||
24 | DBOpenRequest.onerror = function(event) { | |
25 | alert("Database error: " + event.target.errorCode); | |
26 | }; | |
27 | ||
28 | DBOpenRequest.onsuccess = function(event) { | |
29 | db = DBOpenRequest.result; | |
30 | callback(db); | |
31 | db.close(); | |
32 | }; | |
33 | ||
34 | DBOpenRequest.onupgradeneeded = function(event) { | |
35 | let db = event.target.result; | |
36 | db.onerror = function(event) { | |
37 | alert("Error while loading database: " + event.target.errorCode); | |
38 | }; | |
39 | // Create objectStore for vchess->games | |
42c15a75 BA |
40 | let objectStore = db.createObjectStore("games", { keyPath: "gameId" }); |
41 | objectStore.createIndex("score", "score"); //to search by game result | |
967a2686 BA |
42 | } |
43 | } | |
44 | ||
45 | export const GameStorage = | |
46 | { | |
47 | // Optional callback to get error status | |
48 | add: function(game, callback) | |
49 | { | |
50 | dbOperation((db) => { | |
51 | let transaction = db.transaction("games", "readwrite"); | |
52 | if (callback) | |
53 | { | |
54 | transaction.oncomplete = function() { | |
55 | callback({}); //everything's fine | |
56 | } | |
57 | transaction.onerror = function() { | |
58 | callback({errmsg: "addGame failed: " + transaction.error}); | |
59 | }; | |
60 | } | |
61 | let objectStore = transaction.objectStore("games"); | |
62 | objectStore.add(game); | |
63 | }); | |
64 | }, | |
65 | ||
66 | // TODO: also option to takeback a move ? | |
67 | // NOTE: for live games only (all on server for corr) | |
809ba2aa | 68 | update: function(gameId, obj) //colorIdx, nextIdx, move, fen, addTime, score |
967a2686 BA |
69 | { |
70 | dbOperation((db) => { | |
71 | let objectStore = db.transaction("games", "readwrite").objectStore("games"); | |
72 | objectStore.get(gameId).onsuccess = function(event) { | |
73 | const game = event.target.result; | |
74 | if (!!obj.move) | |
75 | { | |
76 | game.moves.push(obj.move); | |
77 | game.fen = obj.fen; | |
66d03f23 | 78 | game.clocks[obj.colorIdx] += obj.addTime; |
809ba2aa | 79 | game.initime[obj.nextIdx] = Date.now(); |
967a2686 | 80 | } |
967a2686 BA |
81 | if (!!obj.score) |
82 | game.score = obj.score; | |
83 | objectStore.put(game); //save updated data | |
84 | } | |
85 | }); | |
86 | }, | |
87 | ||
88 | // Retrieve any live game from its identifiers (locally, running or not) | |
89 | // NOTE: need callback because result is obtained asynchronously | |
90 | get: function(gameId, callback) | |
91 | { | |
92 | dbOperation((db) => { | |
93 | let objectStore = db.transaction('games').objectStore('games'); | |
94 | if (!gameId) //retrieve all | |
95 | { | |
96 | let games = []; | |
97 | objectStore.openCursor().onsuccess = function(event) { | |
98 | let cursor = event.target.result; | |
99 | // if there is still another cursor to go, keep running this code | |
100 | if (cursor) | |
101 | { | |
102 | games.push(cursor.value); | |
103 | cursor.continue(); | |
104 | } | |
105 | else | |
106 | callback(games); | |
107 | } | |
108 | } | |
109 | else //just one game | |
110 | { | |
111 | objectStore.get(gameId).onsuccess = function(event) { | |
112 | callback(event.target.result); | |
113 | } | |
114 | } | |
115 | }); | |
116 | }, | |
117 | ||
42c15a75 BA |
118 | getCurrent: function(callback) |
119 | { | |
120 | dbOperation((db) => { | |
121 | let objectStore = db.transaction('games').objectStore('games'); | |
122 | objectStore.get("*").onsuccess = function(event) { | |
123 | callback(event.target.result); | |
124 | }; | |
125 | }); | |
126 | }, | |
127 | ||
967a2686 BA |
128 | // Delete a game in indexedDB |
129 | remove: function(gameId, callback) | |
130 | { | |
131 | dbOperation((db) => { | |
132 | let transaction = db.transaction(["games"], "readwrite"); | |
133 | if (callback) | |
134 | { | |
135 | transaction.oncomplete = function() { | |
136 | callback({}); //everything's fine | |
137 | } | |
138 | transaction.onerror = function() { | |
139 | callback({errmsg: "removeGame failed: " + transaction.error}); | |
140 | }; | |
141 | } | |
142 | transaction.objectStore("games").delete(gameId); | |
143 | }); | |
144 | }, | |
145 | }; |