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// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
// See License.txt for license information.
const ActionTypes = require('../utils/constants.jsx').ActionTypes;
const AppDispatcher = require('../dispatcher/app_dispatcher.jsx');
const BrowserStore = require('./browser_store.jsx');
const EventEmitter = require('events').EventEmitter;
const UserStore = require('../stores/user_store.jsx');
const CHANGE_EVENT = 'change';
function getPreferenceKey(category, name) {
return `${category}-${name}`;
}
function getPreferenceKeyForModel(preference) {
return `${preference.category}-${preference.name}`;
}
class PreferenceStoreClass extends EventEmitter {
constructor() {
super();
this.getAllPreferences = this.getAllPreferences.bind(this);
this.getPreference = this.getPreference.bind(this);
this.getPreferences = this.getPreferences.bind(this);
this.getPreferencesWhere = this.getPreferencesWhere.bind(this);
this.setAllPreferences = this.setAllPreferences.bind(this);
this.setPreference = this.setPreference.bind(this);
this.emitChange = this.emitChange.bind(this);
this.addChangeListener = this.addChangeListener.bind(this);
this.removeChangeListener = this.removeChangeListener.bind(this);
this.handleEventPayload = this.handleEventPayload.bind(this);
this.dispatchToken = AppDispatcher.register(this.handleEventPayload);
}
getAllPreferences() {
return new Map(BrowserStore.getItem('preferences', []));
}
getPreference(category, name, defaultValue = '') {
return this.getAllPreferences().get(getPreferenceKey(category, name)) || defaultValue;
}
getPreferences(category) {
return this.getPreferencesWhere((preference) => (preference.category === category));
}
getPreferencesWhere(pred) {
const all = this.getAllPreferences();
const preferences = [];
for (const [, preference] of all) {
if (pred(preference)) {
preferences.push(preference);
}
}
return preferences;
}
setAllPreferences(preferences) {
// note that we store the preferences as an array of key-value pairs so that we can deserialize
// it as a proper Map instead of an object
BrowserStore.setItem('preferences', [...preferences]);
}
setPreference(category, name, value) {
const preferences = this.getAllPreferences();
const key = getPreferenceKey(category, name);
let preference = preferences.get(key);
if (!preference) {
preference = {
user_id: UserStore.getCurrentId(),
category,
name
};
}
preference.value = value;
preferences.set(key, preference);
this.setAllPreferences(preferences);
return preference;
}
emitChange(preferences) {
this.emit(CHANGE_EVENT, preferences);
}
addChangeListener(callback) {
this.on(CHANGE_EVENT, callback);
}
removeChangeListener(callback) {
this.removeListener(CHANGE_EVENT, callback);
}
handleEventPayload(payload) {
const action = payload.action;
switch (action.type) {
case ActionTypes.RECIEVED_PREFERENCES:
const preferences = this.getAllPreferences();
for (const preference of action.preferences) {
preferences.set(getPreferenceKeyForModel(preference), preference);
}
this.setAllPreferences(preferences);
this.emitChange(preferences);
}
}
}
const PreferenceStore = new PreferenceStoreClass();
export default PreferenceStore;
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