Call changePassword() on "Save change" press

Call the changePassword() function when a user presses the
"Save change" Change password button.
Also, validate the password fields.

Tested: Changed the password on a Witherspoon.
Change-Id: I479929c82c5e405591fa7b1cf01e5491d35079e7
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/app/users/controllers/user-accounts-controller.js b/app/users/controllers/user-accounts-controller.js
index f3d7160..8847f35 100644
--- a/app/users/controllers/user-accounts-controller.js
+++ b/app/users/controllers/user-accounts-controller.js
@@ -19,8 +19,31 @@
             'dataService',
             function($scope, $window, APIUtils, dataService){
                 $scope.dataService = dataService;
+                $scope.changePassword = function(oldPassword, newPassword, confirmNewPassword){
+                    if(!oldPassword || !newPassword || !confirmNewPassword ){
+                        // TODO: Display error
+                        return false;
+                    }
+                    if (newPassword !== confirmNewPassword){
+                        // TODO: Display error
+                        return false;
+                    }
+                    if (newPassword === oldPassword){
+                        // TODO: Display error
+                        return false;
+                    }
+                    // TODO: Verify the oldPassword is correct
+
+                    APIUtils.changePassword($scope.dataService.getUser(), newPassword).then(function(response){
+                        // Clear the textboxes on a success
+                        $scope.passwordVerify = '';
+                        $scope.password = '';
+                        $scope.oldPassword = '';
+                    }, function(error){
+                        // TODO: Display error
+                    });
+                }
             }
         ]
     );
-
 })(angular);