MOBILE-4631 login: Hide the login form in the app when is hidden in LMS

src/core/classes/sites/unauthenticated-site.ts

@@ -464,6 +464,7 @@ export type CoreSitePublicConfigResponse = {
     tool_mobile_setuplink?: string; // App download page.
     tool_mobile_qrcodetype?: CoreSiteQRCodeType; // eslint-disable-line @typescript-eslint/naming-convention
     warnings?: CoreWSExternalWarning[];
+    showloginform?: number; // @since 4.5. Display default login form.
 };
 
 /**

src/core/features/login/components/login-methods/login-methods.html

@@ -1,4 +1,5 @@
-<div *ngIf="loginMethods.length || identityProviders.length || showScanQR" class="ion-text-center ion-padding core-login-methods-separator">
+<div *ngIf="(showLoginForm || isBrowserSSO) && (loginMethods.length || identityProviders.length || showScanQR)"
+    class="ion-text-center ion-padding core-login-methods-separator">
     <span>{{ 'core.login.or' | translate }}</span>
 </div>
 

src/core/features/login/components/login-methods/login-methods.ts

@@ -32,6 +32,7 @@ export class CoreLoginMethodsComponent implements OnInit {
     @Input() siteUrl = '';
     @Input() siteConfig?: CoreSitePublicConfigResponse;
     @Input() redirectData?: CoreRedirectPayload;
+    @Input() showLoginForm = true;
 
     isBrowserSSO  = false;
     showScanQR  = false;

src/core/features/login/constants.ts

@@ -21,6 +21,8 @@ export const EMAIL_SIGNUP_FEATURE_NAME = 'CoreLoginEmailSignup';
 export const FORGOTTEN_PASSWORD_FEATURE_NAME = 'NoDelegate_ForgottenPassword';
 export const IDENTITY_PROVIDERS_FEATURE_NAME = 'NoDelegate_IdentityProviders';
 export const IDENTITY_PROVIDER_FEATURE_NAME_PREFIX = 'NoDelegate_IdentityProvider_';
+export const ALWAYS_SHOW_LOGIN_FORM = 'always_show_login_form';
+export const ALWAYS_SHOW_LOGIN_FORM_CHANGED = 'always_show_login_form_changed';
 
 // Event indicating that a user left the app because it wasn't supported by a site.
 export const APP_UNSUPPORTED_CHURN = 'app_unsupported_churn';

src/core/features/login/pages/credentials/credentials.html

@@ -43,7 +43,8 @@ <h2 *ngIf="siteName" class="ion-margin-top ion-no-padding core-sitename">
             </div>
 
             <div class="core-login-methods">
-                <form [formGroup]="credForm" (ngSubmit)="login($event)" class="core-login-form" #credentialsForm *ngIf="!isBrowserSSO">
+                <form [formGroup]="credForm" (ngSubmit)="login($event)" class="core-login-form" #credentialsForm
+                    *ngIf="showLoginForm && !isBrowserSSO">
                     <ion-item class="ion-margin-bottom" lines="inset">
                         <ion-input type="text" name="username" placeholder="{{ 'core.login.username' | translate }}"
                             formControlName="username" autocapitalize="none" autocorrect="off" autocomplete="username" enterkeyhint="next"
@@ -80,7 +81,7 @@ <h2 *ngIf="siteName" class="ion-margin-top ion-no-padding core-sitename">
                 </ng-container>
 
 
-                <core-login-methods *ngIf="siteConfig" [siteConfig]="siteConfig" [siteUrl]="site.siteUrl" />
+                <core-login-methods *ngIf="siteConfig" [siteConfig]="siteConfig" [siteUrl]="site.siteUrl" [showLoginForm]="showLoginForm" />
             </div>
 
             <div class="core-login-sign-up" *ngIf="!isBrowserSSO && (canSignup || authInstructions)">

src/core/features/login/pages/credentials/credentials.ts

@@ -24,7 +24,7 @@ import { CoreDomUtils } from '@services/utils/dom';
 import { CoreLoginHelper } from '@features/login/services/login-helper';
 import { Translate } from '@singletons';
 import { CoreSitePublicConfigResponse, CoreUnauthenticatedSite } from '@classes/sites/unauthenticated-site';
-import { CoreEvents } from '@singletons/events';
+import { CoreEventObserver, CoreEvents } from '@singletons/events';
 import { CoreNavigator } from '@services/navigator';
 import { CoreForms } from '@singletons/form';
 import { CoreUserSupport } from '@features/user/services/support';
@@ -33,7 +33,11 @@ import { CoreUserGuestSupportConfig } from '@features/user/classes/support/guest
 import { SafeHtml } from '@angular/platform-browser';
 import { CorePlatform } from '@services/platform';
 import { CoreSitesFactory } from '@services/sites-factory';
-import { EMAIL_SIGNUP_FEATURE_NAME, FORGOTTEN_PASSWORD_FEATURE_NAME } from '@features/login/constants';
+import {
+    ALWAYS_SHOW_LOGIN_FORM_CHANGED,
+    EMAIL_SIGNUP_FEATURE_NAME,
+    FORGOTTEN_PASSWORD_FEATURE_NAME,
+} from '@features/login/constants';
 import { CoreCustomURLSchemes } from '@services/urlschemes';
 import { CoreSiteError } from '@classes/errors/siteerror';
 import { CoreKeyboard } from '@singletons/keyboard';
@@ -66,13 +70,15 @@ export class CoreLoginCredentialsPage implements OnInit, OnDestroy {
     siteConfig?: CoreSitePublicConfigResponse;
     siteCheckError = '';
     displaySiteUrl = false;
+    showLoginForm = true;
 
     protected siteCheck?: CoreSiteCheckResponse;
     protected eventThrown = false;
     protected viewLeft = false;
     protected siteId?: string;
     protected urlToOpen?: string;
     protected valueChangeSubscription?: Subscription;
+    protected alwaysShowLoginFormObserver?: CoreEventObserver;
 
     constructor(
         protected fb: FormBuilder,
@@ -137,6 +143,10 @@ export class CoreLoginCredentialsPage implements OnInit, OnDestroy {
                 }
             });
         }
+
+        this.alwaysShowLoginFormObserver = CoreEvents.on(ALWAYS_SHOW_LOGIN_FORM_CHANGED, async () => {
+            this.showLoginForm = await CoreLoginHelper.shouldShowLoginForm(this.siteConfig);
+        });
     }
 
     /**
@@ -191,6 +201,8 @@ export class CoreLoginCredentialsPage implements OnInit, OnDestroy {
      * Treat the site configuration (if it exists).
      */
     protected async treatSiteConfig(): Promise<void> {
+        this.showLoginForm = await CoreLoginHelper.shouldShowLoginForm(this.siteConfig);
+
         if (!this.siteConfig) {
             this.authInstructions = undefined;
             this.canSignup = false;
@@ -365,6 +377,7 @@ export class CoreLoginCredentialsPage implements OnInit, OnDestroy {
             this.siteId,
         );
         this.valueChangeSubscription?.unsubscribe();
+        this.alwaysShowLoginFormObserver?.off();
     }
 
 }

src/core/features/login/pages/reconnect/reconnect.html

@@ -59,7 +59,8 @@ <h1>{{ 'core.login.reconnect' | translate }}</h1>
             </div>
 
             <div class="core-login-methods">
-                <form *ngIf="!isBrowserSSO" [formGroup]="credForm" (ngSubmit)="login($event)" class="core-login-form" #reconnectForm>
+                <form *ngIf="showLoginForm && !isBrowserSSO" [formGroup]="credForm" (ngSubmit)="login($event)" class="core-login-form"
+                    #reconnectForm>
                     <ion-item class="ion-margin-bottom" lines="inset">
                         <ion-input class="core-ioninput-password" name="password" type="password"
                             placeholder="{{ 'core.login.password' | translate }}" formControlName="password" [clearOnEdit]="false"
@@ -91,7 +92,7 @@ <h1>{{ 'core.login.reconnect' | translate }}</h1>
 
                 <!-- Additional Login methods -->
                 <core-login-methods *ngIf="siteConfig" [siteConfig]="siteConfig" [reconnect]="true" [siteUrl]="site.siteUrl"
-                    [redirectData]="redirectData" />
+                    [redirectData]="redirectData" [showLoginForm]="showLoginForm" />
             </div>
         </div>
     </core-loading>

src/core/features/login/pages/reconnect/reconnect.ts

@@ -21,7 +21,7 @@ import { CoreDomUtils } from '@services/utils/dom';
 import { CoreUtils } from '@services/utils/utils';
 import { CoreLoginHelper } from '@features/login/services/login-helper';
 import { CoreSite } from '@classes/sites/site';
-import { CoreEvents } from '@singletons/events';
+import { CoreEventObserver, CoreEvents } from '@singletons/events';
 import { CoreError } from '@classes/errors/error';
 import { CoreNavigator, CoreRedirectPayload } from '@services/navigator';
 import { CoreForms } from '@singletons/form';
@@ -31,7 +31,7 @@ import { CoreUserAuthenticatedSupportConfig } from '@features/user/classes/suppo
 import { Translate } from '@singletons';
 import { SafeHtml } from '@angular/platform-browser';
 import { CoreSitePublicConfigResponse } from '@classes/sites/unauthenticated-site';
-import { FORGOTTEN_PASSWORD_FEATURE_NAME } from '@features/login/constants';
+import { ALWAYS_SHOW_LOGIN_FORM_CHANGED, FORGOTTEN_PASSWORD_FEATURE_NAME } from '@features/login/constants';
 import { CoreKeyboard } from '@singletons/keyboard';
 
 /**
@@ -63,11 +63,13 @@ export class CoreLoginReconnectPage implements OnInit, OnDestroy {
     exceededAttemptsHTML?: SafeHtml | string | null;
     siteConfig?: CoreSitePublicConfigResponse;
     redirectData?: CoreRedirectPayload;
+    showLoginForm = true;
 
     protected viewLeft = false;
     protected eventThrown = false;
     protected loginSuccessful = false;
     protected username = '';
+    protected alwaysShowLoginFormObserver?: CoreEventObserver;
 
     constructor(
         protected fb: FormBuilder,
@@ -126,6 +128,10 @@ export class CoreLoginReconnectPage implements OnInit, OnDestroy {
 
             await this.checkSiteConfig();
 
+            this.alwaysShowLoginFormObserver = CoreEvents.on(ALWAYS_SHOW_LOGIN_FORM_CHANGED, async () => {
+                this.showLoginForm = await CoreLoginHelper.shouldShowLoginForm(this.siteConfig);
+            });
+
             this.showLoading = false;
         } catch (error) {
             CoreDomUtils.showErrorModal(error);
@@ -147,6 +153,7 @@ export class CoreLoginReconnectPage implements OnInit, OnDestroy {
             },
             this.siteId,
         );
+        this.alwaysShowLoginFormObserver?.off();
     }
 
     /**
@@ -168,6 +175,8 @@ export class CoreLoginReconnectPage implements OnInit, OnDestroy {
             readingStrategy: CoreSitesReadingStrategy.PREFER_NETWORK,
         }));
 
+        this.showLoginForm = await CoreLoginHelper.shouldShowLoginForm(this.siteConfig);
+
         if (!this.siteConfig) {
             return;
         }

src/core/features/login/services/login-helper.ts

@@ -47,6 +47,8 @@ import {
     TypeOfLogin,
 } from '@classes/sites/unauthenticated-site';
 import {
+    ALWAYS_SHOW_LOGIN_FORM,
+    ALWAYS_SHOW_LOGIN_FORM_CHANGED,
     APP_UNSUPPORTED_CHURN,
     EMAIL_SIGNUP_FEATURE_NAME,
     FAQ_QRCODE_IMAGE_HTML,
@@ -924,6 +926,21 @@ export class CoreLoginHelperProvider {
         }
     }
 
+    /**
+     * Check if the default login form should be displayed.
+     *
+     * @param config Site public config.
+     * @returns True if the login form should be displayed.
+     */
+    async shouldShowLoginForm(config?: CoreSitePublicConfigResponse): Promise<boolean> {
+        // Only hide the form if the setting exists and is set to 0.
+        if (config?.showloginform === 0) {
+            return Boolean(await CoreConfig.get(ALWAYS_SHOW_LOGIN_FORM, 0));
+        }
+
+        return true;
+    }
+
     /**
      * Check if a confirm should be shown to open a SSO authentication.
      *
@@ -1692,6 +1709,7 @@ declare module '@singletons/events' {
      * @see https://www.typescriptlang.org/docs/handbook/declaration-merging.html#module-augmentation
      */
     export interface CoreEventsData {
+        [ALWAYS_SHOW_LOGIN_FORM_CHANGED]: { value: number };
         [APP_UNSUPPORTED_CHURN]: { siteUrl: string; debug?: CoreSiteErrorDebug };
     }
 

src/core/features/login/tests/behat/showloginform_setting.feature

@@ -0,0 +1,60 @@
+@core_login @app @javascript @lms_from4.5
+Feature: Test showloginform setting in the app
+
+  Background:
+    Given the Moodle site is compatible with this feature
+    And the following config values are set as admin:
+      | showloginform | 0 |
+    And the following "users" exist:
+      | username | firstname | lastname |
+      | student  | david     | student  |
+
+  Scenario: Login
+    When I launch the app
+    And I set the field "Your site" to "$WWWROOT" in the app
+    And I press "Connect to your site" in the app
+    Then the header should be "Log in" in the app
+    And I should not find "Log in" "ion-button" in the app
+    And I replace "/.*/" within ".core-siteurl" with "https://campus.example.edu"
+    And the UI should match the snapshot
+
+  Scenario: Reconnect
+    When I entered the app as "student"
+    And I log out in the app
+    And I press "david student" in the app
+    Then the header should be "Reconnect" in the app
+    And I should not find "Log in" "ion-button" in the app
+    And I replace "/.*/" within ".core-siteurl" with "https://campus.example.edu"
+    And the UI should match the snapshot
+
+  Scenario: Login with forced developer option
+    When I launch the app
+    And I set the field "Your site" to "$WWWROOT" in the app
+    And I press "Connect to your site" in the app
+    And I press "App settings" in the app
+    And I press "About" in the app
+    And I press "Moodle Mobile" in the app
+    And I press "Developer options" in the app
+    And I press "Always show login form" in the app
+    And I press the back button in the app
+    And I press the back button in the app
+    And I press the back button in the app
+    And I press the back button in the app
+    Then the header should be "Log in" in the app
+    And I should find "Log in" "ion-button" in the app
+
+  Scenario: Reconnect with forced developer option
+    When I entered the app as "student"
+    And I log out in the app
+    And I press "App settings" in the app
+    And I press "About" in the app
+    And I press "Moodle Mobile" in the app
+    And I press "Developer options" in the app
+    And I press "Always show login form" in the app
+    And I press the back button in the app
+    And I press the back button in the app
+    And I press the back button in the app
+    And I press the back button in the app
+    And I press "david student" in the app
+    Then the header should be "Reconnect" in the app
+    And I should find "Log in" "ion-button" in the app

src/core/features/settings/pages/dev/dev.html

@@ -33,6 +33,11 @@ <h1>{{ 'core.settings.developeroptions' | translate }}</h1>
                 <p class="item-heading">Enable staging sites <ion-badge>{{stagingSitesCount}}</ion-badge></p>
             </ion-toggle>
         </ion-item>
+        <ion-item class="ion-text-wrap">
+            <ion-toggle [(ngModel)]="alwaysShowLoginForm" (ionChange)="alwaysShowLoginFormChanged()">
+                <p class="item-heading">Always show login form</p>
+            </ion-toggle>
+        </ion-item>
         <ng-container *ngIf="siteId">
             <ion-item class="ion-text-wrap">
                 <ion-toggle [(ngModel)]="remoteStyles" (ionChange)="remoteStylesChanged()">

src/core/features/settings/pages/dev/dev.ts

@@ -14,12 +14,18 @@
 
 import { CoreConstants } from '@/core/constants';
 import { Component, OnInit } from '@angular/core';
-import { FAQ_QRCODE_INFO_DONE, ONBOARDING_DONE } from '@features/login/constants';
+import {
+    ALWAYS_SHOW_LOGIN_FORM,
+    ALWAYS_SHOW_LOGIN_FORM_CHANGED,
+    FAQ_QRCODE_INFO_DONE,
+    ONBOARDING_DONE,
+} from '@features/login/constants';
 import { CoreSettingsHelper } from '@features/settings/services/settings-helper';
 import { CoreSitePlugins } from '@features/siteplugins/services/siteplugins';
 import { CoreUserTours } from '@features/usertours/services/user-tours';
 import { CoreCacheManager } from '@services/cache-manager';
 import { CoreConfig } from '@services/config';
+import { CoreEvents } from '@singletons/events';
 import { CoreFile } from '@services/file';
 import { CoreNavigator } from '@services/navigator';
 import { CorePlatform } from '@services/platform';
@@ -40,6 +46,7 @@ export class CoreSettingsDevPage implements OnInit {
     rtl = false;
     forceSafeAreaMargins = false;
     direction = 'ltr';
+    alwaysShowLoginForm = false;
 
     remoteStyles = true;
     remoteStylesCount = 0;
@@ -70,6 +77,7 @@ export class CoreSettingsDevPage implements OnInit {
             this.enableStagingSites = await CoreSettingsHelper.hasEnabledStagingSites();
             this.previousEnableStagingSites = this.enableStagingSites;
         }
+        this.alwaysShowLoginForm = Boolean(await CoreConfig.get(ALWAYS_SHOW_LOGIN_FORM, 0));
 
         if (!this.siteId) {
             return;
@@ -125,6 +133,15 @@ export class CoreSettingsDevPage implements OnInit {
         document.documentElement.classList.toggle('force-safe-area-margins', this.forceSafeAreaMargins);
     }
 
+    /**
+     * Called when always show login form is enabled or disabled.
+     */
+    async alwaysShowLoginFormChanged(): Promise<void> {
+        const value = Number(this.alwaysShowLoginForm);
+        await CoreConfig.set(ALWAYS_SHOW_LOGIN_FORM, value);
+        CoreEvents.trigger(ALWAYS_SHOW_LOGIN_FORM_CHANGED, { value });
+    }
+
     /**
      * Called when remote styles is enabled or disabled.
      */