MOBILE-3662 pushnotifications: Implement cron handlers

src/core/features/pushnotifications/pushnotifications.module.ts

@@ -14,6 +14,9 @@
 
 import { APP_INITIALIZER, NgModule } from '@angular/core';
 
+import { CoreCronDelegate } from '@services/cron';
+import { CorePushNotificationsRegisterCronHandler } from './services/handlers/register-cron';
+import { CorePushNotificationsUnregisterCronHandler } from './services/handlers/unregister-cron';
 import { CorePushNotifications } from './services/pushnotifications';
 
 @NgModule({
@@ -27,6 +30,10 @@ import { CorePushNotifications } from './services/pushnotifications';
             multi: true,
             deps: [],
             useFactory: () => async () => {
+                // Register the handlers.
+                CoreCronDelegate.instance.register(CorePushNotificationsRegisterCronHandler.instance);
+                CoreCronDelegate.instance.register(CorePushNotificationsUnregisterCronHandler.instance);
+
                 await CorePushNotifications.instance.initialize();
             },
         },

src/core/features/pushnotifications/services/handlers/register-cron.ts

@@ -0,0 +1,75 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreCronHandler } from '@services/cron';
+import { makeSingleton } from '@singletons';
+import { CorePushNotifications } from '../pushnotifications';
+
+/**
+ * Cron handler to force a register on a Moodle site when a site is manually synchronized.
+ */
+@Injectable({ providedIn: 'root' })
+export class CorePushNotificationsRegisterCronHandlerService implements CoreCronHandler {
+
+    name = 'CorePushNotificationsRegisterCronHandler';
+
+    /**
+     * Check whether the sync can be executed manually. Call isSync if not defined.
+     *
+     * @return Whether the sync can be executed manually.
+     */
+    canManualSync(): boolean {
+        return true; // Execute the handler when the site is manually synchronized.
+    }
+
+    /**
+     * Execute the process.
+     * Receives the ID of the site affected, undefined for all sites.
+     *
+     * @param siteId ID of the site affected, undefined for all sites.
+     * @return Promise resolved when done, rejected if failure.
+     */
+    async execute(siteId?: string): Promise<void> {
+        if (!siteId || !CorePushNotifications.instance.canRegisterOnMoodle()) {
+            // It's not a specific site, don't do anything.
+            return;
+        }
+
+        // Register the device again.
+        await CorePushNotifications.instance.registerDeviceOnMoodle(siteId, true);
+    }
+
+    /**
+     * Get the time between consecutive executions.
+     *
+     * @return Time between consecutive executions (in ms).
+     */
+    getInterval(): number {
+        return 86400000; // 1 day. We won't do anything with automatic execution, so use a big number.
+    }
+
+    /**
+     * Check whether it's a synchronization process or not. True if not defined.
+     *
+     * @return Whether it's a synchronization process or not.
+     */
+    isSync(): boolean {
+        return false;
+    }
+
+}
+
+export class CorePushNotificationsRegisterCronHandler extends makeSingleton(CorePushNotificationsRegisterCronHandlerService) {}

src/core/features/pushnotifications/services/handlers/unregister-cron.ts

@@ -0,0 +1,51 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreCronHandler } from '@services/cron';
+import { makeSingleton } from '@singletons';
+import { CorePushNotifications } from '../pushnotifications';
+
+/**
+ * Cron handler to retry pending unregisters.
+ */
+@Injectable({ providedIn: 'root' })
+export class CorePushNotificationsUnregisterCronHandlerService implements CoreCronHandler {
+
+    name = 'CorePushNotificationsUnregisterCronHandler';
+
+    /**
+     * Execute the process.
+     * Receives the ID of the site affected, undefined for all sites.
+     *
+     * @param siteId ID of the site affected, undefined for all sites.
+     * @return Promise resolved when done, rejected if failure.
+     */
+    async execute(siteId?: string): Promise<void> {
+        await CorePushNotifications.instance.retryUnregisters(siteId);
+    }
+
+    /**
+     * Get the time between consecutive executions.
+     *
+     * @return Time between consecutive executions (in ms).
+     */
+    getInterval(): number {
+        return 300000;
+    }
+
+}
+
+export class CorePushNotificationsUnregisterCronHandler extends makeSingleton(CorePushNotificationsUnregisterCronHandlerService) {}