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GameStore.js
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GameStore.js
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var _ = require('underscore')
, superagent = require('superagent')
, CloudListener = require('./CloudListener')
, BaseURL = require('./BaseURL')
, Session = require('./Session');
var GameStore = function (session) {
this.session_ = session;
this.gameStateByID_ = {};
this.listeners_ = [];
this.cloudSubscription_ = CloudListener.subscribeCallback(this.onCloudMessage_.bind(this));
};
// null if uninitialized
GameStore.prototype.getGameState = function(gameID) {
return this.gameStateByID_[gameID];
};
// a listener is a function of 1 argument, an array of changed gameIDs
GameStore.prototype.addListener = function(listener) {
this.listeners_.push(listener);
};
GameStore.prototype.removeListener = function(listener) {
this.listeners_ = _.without(this.listeners_, listener);
};
GameStore.prototype.syncGameState = function(gameID, sequenceID, completion) {
completion = completion || _.identity;
var existingState = this.gameStateByID_[gameID];
if (sequenceID && existingState && existingState.sequenceID >= sequenceID) {
completion();
return;
}
superagent.get(BaseURL + '/api/game/' + gameID + '/state')
.end(function(res) {
if (!res.ok) {
console.log('error syncing state', res.text);
completion();
return;
}
this.setGameState_(res.body);
completion();
}.bind(this));
};
// internal
GameStore.prototype.setGameState_ = function(game_state) {
if (!game_state) {
return;
}
this.gameStateByID_[game_state.id] = game_state;
_.each(this.listeners_, function(listener) {
listener([game_state.id]);
});
};
GameStore.prototype.onCloudMessage_ = function(subscription, message) {
if (message.type === 'sync' && message.objectType === 'game') {
this.syncGameState(message.objectID, message.sequenceID);
}
};
Session.prototype.GameStore = function() {
return this.getInstance('gamestore', GameStore);
};
module.exports = GameStore;