add settings/password_change state

src/controllers/states/SettingsController.js

@@ -0,0 +1,33 @@
+/* global angular */
+angular.module('codexen')
+  .controller('SettingsController', function (Settings) {
+    var vm = this
+
+    vm.changePassword = changePassword
+    vm.isSuccess = false
+    vm.isError = false
+
+    function changePassword () {
+      var params = {
+        password: vm.password,
+        newPassword: vm.newPassword
+      }
+
+      Settings.changePassword(params)
+        .success(function (data) {
+          resetInput()
+          vm.isSuccess = true
+          vm.isError = false
+        })
+        .error(function () {
+          resetInput()
+          vm.isError = true
+          vm.isSuccess = false
+        })
+    }
+
+    function resetInput () {
+      vm.password = ''
+      vm.newPassword = ''
+    }
+  })