Wallet/js/controllers/import.js

'use strict';

angular.module('copayApp.controllers').controller('ImportController',
  function($scope, $rootScope, walletFactory, controllerUtils, Passphrase) {
    $scope.title = 'Import a backup';
    var reader = new FileReader();
    var _importBackup = function(encryptedObj) {
      Passphrase.getBase64Async($scope.password, function(passphrase){
        var w, errMsg;
        try {
          w = walletFactory.fromEncryptedObj(encryptedObj, passphrase);
        } catch(e) {
          errMsg = e.message;
        }
        if (!w) {
          $scope.loading = false;
          $rootScope.$flashMessage = { message: errMsg || 'Wrong password', type: 'error'};
          $rootScope.$digest();
          return;
        }
        $rootScope.wallet = w;

        controllerUtils.startNetwork($rootScope.wallet);
        $rootScope.wallet.on('connectionError', function() {
          var message = "Looks like you are already connected to this wallet, please logout from it and try importing it again.";
          $rootScope.$flashMessage = { message: message, type: 'error'};
        });
        $rootScope.wallet.on('serverError', function() {
          $rootScope.$flashMessage = { message: 'The PeerJS server is not responding, please try again', type: 'error'};
          controllerUtils.onErrorDigest();
        });
      });
    };

    $scope.openFileDialog = function() {
      if (window.cshell) {
        return cshell.send('backup:import');
      }
      $scope.choosefile = !$scope.choosefile;
    };

    $scope.openPasteArea = function() {
      $scope.pastetext = !$scope.pastetext;
    };

    $scope.getFile = function() {
      // If we use onloadend, we need to check the readyState.
      reader.onloadend = function(evt) {
        if (evt.target.readyState == FileReader.DONE) { // DONE == 2
          var encryptedObj = evt.target.result;
          _importBackup(encryptedObj);
        }
      };
    };

    $scope.import = function(form) {
      if (form.$invalid) {
        $scope.loading = false;
        $rootScope.$flashMessage = { message: 'There is an error in the form. Please, try again', type: 'error'};
        return;
      }

      var backupFile = $scope.file;
      var backupText = form.backupText.$modelValue;
      var password = form.password.$modelValue;

      if (!backupFile && !backupText) {
        $scope.loading = false;
        $rootScope.$flashMessage = { message: 'Please, select your backup file or paste the text', type: 'error'};
        $scope.loading = false;
        return;
      }

      $scope.loading = true;

      if (backupFile) {
        reader.readAsBinaryString(backupFile);
      }
      else {
        _importBackup(backupText);
      }
    };
  });