From cb8f9732e2881fdfbde98e01acfbbdea1f13e112 Mon Sep 17 00:00:00 2001
From: Noel De Martin <noel@moodle.com>
Date: Wed, 23 Jun 2021 15:42:45 +0200
Subject: [PATCH] MOBILE-3320 block: Avoid rendering unknown blocks

---
 src/core/features/block/classes/base-block-handler.ts | 10 ++--------
 src/core/features/block/services/block-delegate.ts    |  2 +-
 2 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/src/core/features/block/classes/base-block-handler.ts b/src/core/features/block/classes/base-block-handler.ts
index 89c0fef81..161e7e319 100644
--- a/src/core/features/block/classes/base-block-handler.ts
+++ b/src/core/features/block/classes/base-block-handler.ts
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 import { CoreCourseBlock } from '@features/course/services/course';
-import { CoreBlockPreRenderedComponent } from '../components/pre-rendered-block/pre-rendered-block';
 import { CoreBlockHandler, CoreBlockHandlerData } from '../services/block-delegate';
 
 /**
@@ -48,14 +47,9 @@ export class CoreBlockBaseHandler implements CoreBlockHandler {
         block: CoreCourseBlock, // eslint-disable-line @typescript-eslint/no-unused-vars
         contextLevel: string, // eslint-disable-line @typescript-eslint/no-unused-vars
         instanceId: number, // eslint-disable-line @typescript-eslint/no-unused-vars
-    ): CoreBlockHandlerData | Promise<CoreBlockHandlerData> {
-
+    ): undefined | CoreBlockHandlerData | Promise<CoreBlockHandlerData> {
         // To be overridden.
-        return {
-            title: '',
-            class: '',
-            component: CoreBlockPreRenderedComponent,
-        };
+        return undefined;
     }
 
 }
diff --git a/src/core/features/block/services/block-delegate.ts b/src/core/features/block/services/block-delegate.ts
index 481fdfaa2..593b4edbb 100644
--- a/src/core/features/block/services/block-delegate.ts
+++ b/src/core/features/block/services/block-delegate.ts
@@ -44,7 +44,7 @@ export interface CoreBlockHandler extends CoreDelegateHandler {
         block: CoreCourseBlock,
         contextLevel: string,
         instanceId: number,
-    ): CoreBlockHandlerData | Promise<CoreBlockHandlerData>;
+    ): undefined | CoreBlockHandlerData | Promise<CoreBlockHandlerData>;
 }
 
 /**