mirror of https://github.com/moparisthebest/mail
80 lines
2.4 KiB
JavaScript
80 lines
2.4 KiB
JavaScript
/**
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* High level storage api that handles all persistence on the device. If
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* SQLcipher/SQLite is available, all data is securely persisted there,
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* through transparent encryption. If not, the crypto API is
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* used to encrypt data on the fly before persisting via a JSON store.
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*/
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define(function(require) {
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'use strict';
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var util = require('cryptoLib/util'),
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jsonDao = require('js/dao/lawnchair-dao');
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var DeviceStorageDAO = function() {
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};
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DeviceStorageDAO.prototype.init = function(emailAddress, callback) {
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jsonDao.init(emailAddress, callback);
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};
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/**
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* Stores a list of encrypted items in the object store
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* @param list [Array] The list of items to be persisted
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* @param type [String] The type of item to be persisted e.g. 'email'
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*/
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DeviceStorageDAO.prototype.storeEcryptedList = function(list, type, callback) {
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var date, key, items = [];
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// nothing to store
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if (list.length === 0) {
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callback();
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return;
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}
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// format items for batch storing in dao
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list.forEach(function(i) {
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// put uid in key if available... for easy querying
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if (i.uid) {
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key = type + '_' + i.uid;
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} else if (i.sentDate) {
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date = util.parseDate(i.sentDate);
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key = type + '_' + i.sentDate + '_' + i.id;
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} else {
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key = type + '_' + i.id;
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}
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items.push({
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key: key,
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object: i
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});
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});
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jsonDao.batch(items, function() {
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callback();
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});
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};
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/**
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* List stored items of a given type
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* @param type [String] The type of item e.g. 'email'
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* @param offset [Number] The offset of items to fetch (0 is the last stored item)
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* @param num [Number] The number of items to fetch (null means fetch all)
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*/
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DeviceStorageDAO.prototype.listEncryptedItems = function(type, offset, num, callback) {
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// fetch all items of a certain type from the data-store
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jsonDao.list(type, offset, num, function(encryptedList) {
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callback(null, encryptedList);
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});
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};
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/**
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* Clear the whole device data-store
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*/
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DeviceStorageDAO.prototype.clear = function(callback) {
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jsonDao.clear(callback);
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};
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return DeviceStorageDAO;
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}); |