Add email wallet backup using iframe

js/app.js

@@ -33,6 +33,13 @@ var copayApp = window.copayApp = angular.module('copayApp', [
   'copayApp.directives',
 ]);
 
+copayApp.config(function($sceDelegateProvider) {
+ $sceDelegateProvider.resourceUrlWhitelist([
+   'self',
+   'mailto:**'
+  ]);
+});
+
 angular.module('copayApp.filters', []);
 angular.module('copayApp.services', []);
 angular.module('copayApp.controllers', []);

js/controllers/backup.js

@@ -1,9 +1,9 @@
 'use strict';
 
 angular.module('copayApp.controllers').controller('BackupController',
-  function($scope, $rootScope, $location, $window, $timeout, $modal, backupService, walletFactory, controllerUtils) {
+  function($scope, $rootScope, backupService, walletFactory, controllerUtils) {
     $scope.download = function() {
-      backupService.download($rootScope.wallet);
+      backupService.download($rootScope.wallet, $rootScope);
     };
 
     $scope.deleteWallet = function() {

js/controllers/header.js

@@ -90,12 +90,12 @@ angular.module('copayApp.controllers').controller('HeaderController',
     $scope.backup = function() {
       var w = $rootScope.wallet;
       w.setBackupReady();
-      backupService.download(w);
+      backupService.download(w, $rootScope);
     };
 
     $scope.dowloadBackup = function() {
       var w = $rootScope.wallet;
-      backupService.download(w);
+      backupService.download(w, $rootScope);
     }
 
     $scope.getVideoURL = function(copayer) {

js/services/backupService.js

@@ -9,7 +9,7 @@ BackupService.prototype.getName = function(wallet) {
   return (wallet.name ? (wallet.name + '-') : '') + wallet.id;
 };
 
-BackupService.prototype.download = function(wallet) {
+BackupService.prototype.download = function(wallet, scope) {
   var ew = wallet.toEncryptedObj();
   var partial = !wallet.publicKeyRing.isComplete();
   var walletName = this.getName(wallet) + (partial ? '-Partial' : '');
@@ -28,6 +28,17 @@ BackupService.prototype.download = function(wallet) {
       wallet: ew
     });
   }
+
+  // throw an email intent if we are in the mobile version
+  if (window.xwalk && scope) {
+    var name = wallet.name ? wallet.name + ' ' : '';
+    var partial = partial ? 'Partial ' : '';
+    var subject = 'Copay - ' + name + 'Wallet ' + partial + 'Backup';
+    var body = 'This is the encrypted backup of the wallet ' + wallet.id + ':\n\n' + ew;
+    scope.mobileBackupURI = encodeURI('mailto:?subject=' + subject + '&body=' + body);
+    return;
+  }
+
   // otherwise lean on the browser implementation
   saveAs(blob, filename);
 };