signal-desktop/js/storage.js

79 lines
2.3 KiB
JavaScript

/*
* vim: ts=4:sw=4:expandtab
*/
;(function() {
'use strict';
window.Whisper = window.Whisper || {};
var Item = Backbone.Model.extend({
database: Whisper.Database,
storeName: 'items'
});
var ItemCollection = Backbone.Collection.extend({
model: Item,
storeName: 'items',
database: Whisper.Database,
});
var ready = false;
var items = new ItemCollection();
items.on('reset', function() { ready = true; });
window.storage = {
/*****************************
*** Base Storage Routines ***
*****************************/
put: function(key, value) {
if (value === undefined) {
throw new Error("Tried to store undefined");
}
if (!ready) {
console.log('Called storage.put before storage is ready. key:', key);
}
var item = items.add({id: key, value: value}, {merge: true});
return new Promise(function(resolve, reject) {
item.save().then(resolve, reject);
});
},
get: function(key, defaultValue) {
var item = items.get("" + key);
if (!item) {
return defaultValue;
}
return item.get('value');
},
remove: function(key) {
var item = items.get("" + key);
if (item) {
items.remove(item);
return new Promise(function(resolve, reject) {
item.destroy().then(resolve, reject);
});
}
return Promise.resolve();
},
onready: function(callback) {
if (ready) {
callback();
} else {
items.on('reset', callback);
}
},
fetch: function() {
return new Promise(function(resolve) {
items.fetch({reset: true}).fail(function() {
console.log('Failed to fetch from storage');
}).always(resolve);
});
},
reset: function() {
items.reset();
}
};
window.textsecure = window.textsecure || {};
window.textsecure.storage = window.textsecure.storage || {};
window.textsecure.storage.impl = window.storage;
})();