Refactored to have the mobile and desktop secure storage contained with a more generic secure storage service.

src/js/services/mobileSecureStorageService.js

@@ -0,0 +1,93 @@
+'use strict';
+
+angular.module('copayApp.services').factory('mobileSecureStorageService', function($log, appConfigService, platformInfo) {
+  var root = {};
+
+  var isReady = false;
+  var initialisationFailed = false;
+  var pending = [];
+  
+  var storage = null;
+
+  this.get = function(key, cb) {
+    if (!isReady) {
+      if (initialisationFailed) {
+        cb(new Error("mobileSecureStorageService initialisation failed."));
+      } else {
+        pending.push(function(){ root.get(key, cb); });
+      }
+      return
+    }
+
+    storage.get(
+      function (value) { 
+        cb(null, value);
+      },
+      function (error) { 
+        if (error.message === 'Failure in SecureStorage.get() - The specified item could not be found in the keychain' || // iOS
+          error.message === 'Key [_SS_profile] not found.') { // Android
+          // The callback expects no error, but also no value, if it cannot be found.
+          cb(null, null);
+        } else {
+          cb(new Error(error));
+        }
+      },
+      key);
+  }
+
+  this.set = function(key, value, cb) {
+    if (!isReady) {
+        if (initialisationFailed) {
+          cb(new Error("mobileSecureStorageService initialisation failed."));
+        } else {
+          pending.push(function(){ root.set(key, value, cb); });
+        }
+        return
+    }
+
+    storage.set(
+      function (value) { 
+        cb();
+      },
+      function (error) { 
+        cb(new Error(error));
+      },
+      key, value);
+  }
+
+  if (platformInfo.isCordova) {
+    storage = new cordova.plugins.SecureStorage(
+    function () {
+        $log.debug('mobileSecureStorageService initialised.');
+        isReady = true;
+        for (var i = 0; i < pending.length; i++) {
+          pending[i]();
+        }
+        pending = [];
+      },
+    function (error) { 
+      c$log.debug('mobileSecureStorageService initialisation failed. ' + error); 
+      initialisationFailed = true;
+    },
+    appConfigService.packageNameId);
+  }
+
+  root.get = function(key, cb) {
+    if (platformInfo.isMobile) {
+      storage.get(key, cb);
+    } else {
+      cb(new Error('mobileSecureStorageService is only available on mobile.'));
+    }
+  };
+
+  root.set = function(key, value, cb) {
+    if (platformInfo.isMobile) {
+      storage.set(key, v, cb);
+    } else {
+      cb(new Error('mobileSecureStorageService is only available on mobile.'));
+    }
+  };
+
+  return root;
+});
+