Implement changePassword feature

Author: guillaume-roy

README.md

@@ -264,7 +264,23 @@ You can expect more login mechanisms to be added in the future.
   }).then(
       function () {
         // called when password reset was successful,
-        // you ccould now prompt the user to check his email
+        // you could now prompt the user to check his email
+      },
+      function (errorMessage) {
+        console.log(errorMessage);
+      }
+  )
+```
+
+#### Changing a password
+```js
+  firebase.changePassword({
+    email: '[email protected]',
+    oldPassword: 'myOldPassword',
+    newPassword: 'myNewPassword'
+  }).then(
+      function () {
+        // called when password change was successful,
       },
       function (errorMessage) {
         console.log(errorMessage);

firebase.android.js

@@ -158,6 +158,30 @@ firebase.resetPassword = function (arg) {
   });
 };
 
+firebase.changePassword = function (arg) {
+  return new Promise(function (resolve, reject) {
+    try {
+      var resultHandler = new com.firebase.client.Firebase.ResultHandler({
+        onSuccess: function () {
+          resolve();
+        },
+        onError: function (firebaseError) {
+          reject(firebaseError.getMessage());
+        }
+      });
+
+      if (!arg.email || !arg.oldPassword || !arg.newPassword) {
+        reject("Changing a password requires an email and an oldPassword and a newPassword arguments");
+      } else {
+        instance.changePassword(arg.email, arg.oldPassword, arg.newPassword, resultHandler);
+      }
+    } catch (ex) {
+      console.log("Error in firebase.changePassword: " + ex);
+      reject(ex);
+    }
+  });
+};
+
 firebase.createUser = function (arg) {
   return new Promise(function (resolve, reject) {
     try {

firebase.d.ts

@@ -110,10 +110,20 @@ declare module "nativescript-plugin-firebase" {
       value: any;
     }
 
+    /**
+     * The options object passed into the changePassword function.
+     */
+    export interface ChangePasswordOptions {
+      email: string;
+      oldPassword: string;
+      newPassword: string
+    }
+
     export function init(options: InitOptions): Promise<any>;
     export function login(options: LoginOptions): Promise<LoginResult>;
     export function createUser(options: CreateUserOptions): Promise<CreateUserResult>;
     export function resetPassword(options: ResetPasswordOptions): Promise<any>;
+    export function changePassword(options: ChangePasswordOptions): Promise<any>;
     export function push(path: string, value: any): Promise<PushResult>;
     export function setValue(path: string, value: any): Promise<any>;
     export function update(path: string, value: any): Promise<any>;

firebase.ios.js

@@ -123,6 +123,29 @@ firebase.resetPassword = function (arg) {
   });
 };
 
+firebase.changePassword = function (arg) {
+  return new Promise(function (resolve, reject) {
+    try {
+      var onCompletion = function(error) {
+        if (error) {
+          reject(error.localizedDescription);
+        } else {
+          resolve();
+        }
+      };
+
+      if (!arg.email || !arg.oldPassword || !arg.newPassword) {
+        reject("Changing a password requires an email and an oldPassword and a newPassword arguments");
+      } else {
+        instance.changePasswordForUserFromOldToNewWithCompletionBlock(arg.email, arg.oldPassword, arg.newPassword, onCompletion);
+      }
+    } catch (ex) {
+      console.log("Error in firebase.changePassword: " + ex);
+      reject(ex);
+    }
+  });
+};
+
 firebase.createUser = function (arg) {
   return new Promise(function (resolve, reject) {
     try {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nativescript-plugin-firebase",
-  "version": "2.1.6",
+  "version": "2.1.7",
   "description" : "Fire. Base. Firebase!",
   "main" : "firebase.js",
   "nativescript": {