mirror of https://github.com/moparisthebest/mail
63 lines
1.9 KiB
JavaScript
63 lines
1.9 KiB
JavaScript
'use strict';
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/**
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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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app.dao.DeviceStorage = function(util, crypto, jsonDao, sqlcipherDao) {
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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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this.storeEcryptedList = function(list, type, callback) {
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var i, date, key, items = [];
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// format items for batch storing in dao
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for (i = 0; i < list.length; i++) {
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// put date in key if available... for easy querying
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if (list[i].sentDate) {
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date = util.parseDate(list[i].sentDate);
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key = crypto.emailAddress + '_' + type + '_' + date.getTime() + '_' + list[i].id;
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} else {
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key = crypto.emailAddress + '_' + type + '_' + list[i].id;
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}
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items.push({ key:key, object:list[i] });
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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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* Decrypts the stored items of a given type and returns them
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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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this.listItems = 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(crypto.emailAddress + '_' + type, offset, num, function(encryptedList) {
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// decrypt list
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crypto.aesDecryptListForUser(encryptedList, function(decryptedList) {
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callback(decryptedList);
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});
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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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this.clear = function(callback) {
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jsonDao.clear(callback);
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};
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}; |