MOBILE-4034 login: Close IAB after user changes password

src/core/features/login/pages/change-password/change-password.ts

@@ -12,13 +12,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component } from '@angular/core';
+import { Component, OnDestroy } from '@angular/core';
 
 import { CoreSites } from '@services/sites';
 import { CoreDomUtils } from '@services/utils/dom';
 import { CoreLoginHelper } from '@features/login/services/login-helper';
 import { Translate } from '@singletons';
 import { CoreNavigator } from '@services/navigator';
+import { CoreEventObserver, CoreEvents } from '@singletons/events';
+import { CoreUtils } from '@services/utils/utils';
 
 /**
  * Page that shows instructions to change the password.
@@ -27,11 +29,14 @@ import { CoreNavigator } from '@services/navigator';
     selector: 'page-core-login-change-password',
     templateUrl: 'change-password.html',
 })
-export class CoreLoginChangePasswordPage {
+export class CoreLoginChangePasswordPage implements OnDestroy {
 
     changingPassword = false;
     logoutLabel: string;
 
+    protected urlLoadedObserver?: CoreEventObserver;
+    protected browserClosedObserver?: CoreEventObserver;
+
     constructor() {
         this.logoutLabel = CoreLoginHelper.getLogoutLabel();
     }
@@ -57,6 +62,7 @@ export class CoreLoginChangePasswordPage {
             true,
         );
         this.changingPassword = true;
+        this.detectPasswordChanged();
     }
 
     /**
@@ -75,4 +81,37 @@ export class CoreLoginChangePasswordPage {
         this.changingPassword = false;
     }
 
+    /**
+     * Try to detect if the user changed password in browser.
+     */
+    detectPasswordChanged(): void {
+        if (this.urlLoadedObserver) {
+            // Already listening (shouldn't happen).
+            return;
+        }
+
+        this.urlLoadedObserver = CoreEvents.on(CoreEvents.IAB_LOAD_START, (event) => {
+            if (event.url.match(/\/login\/change_password\.php.*return=1/)) {
+                // Password should have changed.
+                CoreUtils.closeInAppBrowser();
+                this.login();
+            }
+        });
+
+        this.browserClosedObserver = CoreEvents.on(CoreEvents.IAB_EXIT, () => {
+            this.urlLoadedObserver?.off();
+            this.browserClosedObserver?.off();
+            delete this.urlLoadedObserver;
+            delete this.browserClosedObserver;
+        });
+    }
+
+    /**
+     * @inheritdoc
+     */
+    ngOnDestroy(): void {
+        this.urlLoadedObserver?.off();
+        this.browserClosedObserver?.off();
+    }
+
 }