mirror of https://github.com/moparisthebest/mail
220 lines
5.4 KiB
JavaScript
220 lines
5.4 KiB
JavaScript
/**
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* A high-level Data-Access Api for handling Email synchronization
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* between the cloud service and the device's local storage
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*/
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app.dao.EmailDAO = function(jsonDB, crypto, devicestorage, cloudstorage, util, keychain) {
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'use strict';
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/**
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* Inits all dependencies
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*/
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this.init = function(account, password, callback) {
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this.account = account;
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// validate email address
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var emailAddress = account.get('emailAddress');
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if (!validateEmail(emailAddress)) {
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callback({
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errMsg: 'The user email address must be specified!'
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});
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return;
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}
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// init user's local database
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jsonDB.init(emailAddress);
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// call getUserKeyPair to read/sync keypair with devicestorage/cloud
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keychain.getUserKeyPair(emailAddress, function(err, storedKeypair) {
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if (err) {
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callback(err);
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return;
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}
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// init crypto
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initCrypto(storedKeypair);
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});
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function initCrypto(storedKeypair) {
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crypto.init({
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emailAddress: emailAddress,
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password: password,
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keySize: account.get('symKeySize'),
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rsaKeySize: account.get('asymKeySize'),
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storedKeypair: storedKeypair
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}, function(err, generatedKeypair) {
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if (err) {
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callback(err);
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return;
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}
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if (generatedKeypair) {
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// persist newly generated keypair
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keychain.putUserKeyPair(generatedKeypair, callback);
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} else {
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callback();
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}
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});
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}
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};
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/**
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* Fetch an email with the following id
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*/
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this.getItem = function(folderName, itemId) {
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var folder = this.account.get('folders').where({
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name: folderName
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})[0];
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var mail = _.find(folder.get('items'), function(email) {
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return email.id + '' === itemId + '';
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});
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return mail;
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};
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/**
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* Fetch a list of emails from the device's local storage
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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(folderName, offset, num, callback) {
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var collection, folder, already, pubkeyIds = [],
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self = this;
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// check if items are in memory already (account.folders model)
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folder = this.account.get('folders').where({
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name: folderName
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})[0];
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if (!folder) {
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// get encrypted items from storage
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devicestorage.listEncryptedItems('email_' + folderName, offset, num, function(err, encryptedList) {
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if (err) {
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callback(err);
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return;
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}
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if (encryptedList.length === 0) {
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callback(null, []);
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return;
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}
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// gather public key ids required to verify signatures
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encryptedList.forEach(function(i) {
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already = null;
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already = _.findWhere(pubkeyIds, {
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_id: i.senderPk
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});
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if (!already) {
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pubkeyIds.push({
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_id: i.senderPk
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});
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}
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});
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// fetch public keys from keychain
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keychain.getPublicKeys(pubkeyIds, function(err, senderPubkeys) {
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if (err) {
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callback(err);
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return;
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}
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// decrypt list
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crypto.decryptListForUser(encryptedList, senderPubkeys, function(err, decryptedList) {
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if (err) {
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callback(err);
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return;
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}
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// cache collection in folder memory
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if (decryptedList.length > 0) {
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folder = new app.model.Folder({
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name: folderName
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});
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folder.set('items', decryptedList);
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self.account.get('folders').add(folder);
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}
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callback(null, decryptedList);
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});
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});
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});
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} else {
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// read items from memory
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collection = folder.get('items');
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callback(null, collection);
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}
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};
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/**
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* Synchronize a folder's items from the cloud to the device-storage
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* @param folderName [String] The name of the folder e.g. 'inbox'
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*/
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this.syncFromCloud = function(folderName, callback) {
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var folder, self = this;
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cloudstorage.listEncryptedItems('email', this.account.get('emailAddress'), folderName, function(err, data) {
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// return if an error occured
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if (err) {
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callback({
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errMsg: 'Syncing encrypted items from cloud failed!',
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err: err
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}); // error
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return;
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}
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// TODO: remove old folder items from devicestorage
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// persist encrypted list in device storage
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devicestorage.storeEcryptedList(data, 'email_' + folderName, function() {
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// remove cached folder in account model
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folder = self.account.get('folders').where({
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name: folderName
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})[0];
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if (folder) {
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self.account.get('folders').remove(folder);
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}
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callback();
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});
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});
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};
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/**
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* Send a plaintext Email to the user's outbox in the cloud
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*/
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this.sendEmail = function(email, callback) {
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var userId = this.account.get('emailAddress');
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// validate email addresses
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var invalidRecipient;
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_.each(email.get('to'), function(address) {
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if (!validateEmail(address)) {
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invalidRecipient = address;
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}
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});
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if (invalidRecipient) {
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callback({
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errMsg: 'Invalid recipient: ' + invalidRecipient
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});
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return;
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}
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if (!validateEmail(email.get('from'))) {
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callback({
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errMsg: 'Invalid sender: ' + email.from
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});
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return;
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}
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// generate a new UUID for the new email
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email.set('id', util.UUID());
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// send email to cloud service
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cloudstorage.putEncryptedItem(email, 'email', userId, 'outbox', function(err) {
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callback(err);
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});
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};
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function validateEmail(email) {
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var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
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return re.test(email);
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}
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}; |