MOBILE-4470 assign: Implement action link handler

This is necessary to handle links in timeline block. We'll need to do this in more situations, but for now it seems like assign is the only one with special actions. See MDL-81912.

src/addons/mod/assign/pages/index/index.ts

@@ -12,9 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, ViewChild } from '@angular/core';
+import { AfterViewInit, Component, ViewChild } from '@angular/core';
 import { CoreCourseModuleMainActivityPage } from '@features/course/classes/main-activity-page';
 import { AddonModAssignIndexComponent } from '../../components/index/index';
+import { CoreNavigator } from '@services/navigator';
+import { CoreUtils } from '@services/utils/utils';
 
 /**
  * Page that displays an assign.
@@ -23,8 +25,30 @@ import { AddonModAssignIndexComponent } from '../../components/index/index';
     selector: 'page-addon-mod-assign-index',
     templateUrl: 'index.html',
 })
-export class AddonModAssignIndexPage extends CoreCourseModuleMainActivityPage<AddonModAssignIndexComponent> {
+export class AddonModAssignIndexPage extends CoreCourseModuleMainActivityPage<AddonModAssignIndexComponent>
+    implements AfterViewInit {
+
+    private action?: string;
 
     @ViewChild(AddonModAssignIndexComponent) activityComponent?: AddonModAssignIndexComponent;
 
+    constructor() {
+        super();
+
+        this.action = CoreNavigator.getRouteParam('action');
+    }
+
+    /**
+     * @inheritdoc
+     */
+    async ngAfterViewInit(): Promise<void> {
+        switch (this.action) {
+            case 'editsubmission':
+                await CoreUtils.waitFor(() => !!this.activityComponent?.submissionComponent, { timeout: 5000 });
+                await this.activityComponent?.submissionComponent?.goToEdit();
+
+                break;
+        }
+    }
+
 }

src/addons/mod/assign/services/handlers/index-link.ts

@@ -14,6 +14,7 @@
 
 import { Injectable } from '@angular/core';
 import { CoreContentLinksModuleIndexHandler } from '@features/contentlinks/classes/module-index-handler';
+import { CoreNavigationOptions } from '@services/navigator';
 import { makeSingleton } from '@singletons';
 
 /**
@@ -28,5 +29,16 @@ export class AddonModAssignIndexLinkHandlerService extends CoreContentLinksModul
         super('AddonModAssign', 'assign');
     }
 
+    /**
+     * @inheritdoc
+     */
+    getModNavOptions(url: string, params: Record<string, string>): CoreNavigationOptions {
+        if (!params.action) {
+            return {};
+        }
+
+        return { params: { action: params.action } };
+    }
+
 }
 export const AddonModAssignIndexLinkHandler = makeSingleton(AddonModAssignIndexLinkHandlerService);

src/core/features/courses/tests/behat/basic_usage.feature

@@ -119,14 +119,21 @@ Feature: Test basic usage of courses in app
   Scenario: Links to actions in Timeline work for teachers/students
     # Submit assignment as student
     Given I entered the app as "student1"
-    When I press "Add submission" in the app
+    When I press "assignment" in the app
     Then the header should be "assignment" in the app
     And I should find "Test assignment description" in the app
     And I should find "No attempt" in the app
     And I should find "Due:" in the app
 
     When I press "Add submission" in the app
-    And I set the field "Online text submissions" to "test" in the app
+    Then I should find "Online text submissions" in the app
+
+    When I press the back button in the app
+    And I press the back button in the app
+    And I press "Add submission" in the app
+    Then I should find "Online text submissions" in the app
+
+    When I set the field "Online text submissions" to "test" in the app
     And I press "Save" in the app
     And I press "Submit assignment" in the app
     And I press "OK" in the app