MOBILE-4126 ios: Fix handleOpenURL when app is closed

It seems the function was declared too late, when it had already been called.

src/app/app.component.ts

@@ -47,7 +47,6 @@ export class AppComponent implements OnInit, AfterViewInit {
 
     @ViewChild(IonRouterOutlet) outlet?: IonRouterOutlet;
 
-    protected lastUrls: Record<string, number> = {};
     protected lastInAppUrl?: string;
 
     /**
@@ -157,30 +156,6 @@ export class AppComponent implements OnInit, AfterViewInit {
             }, 1000);
         });
 
-        // Handle app launched with a certain URL (custom URL scheme).
-        win.handleOpenURL = (url: string): void => {
-            // Execute the callback in the Angular zone, so change detection doesn't stop working.
-            NgZone.run(() => {
-                // First check that the URL hasn't been treated a few seconds ago. Sometimes this function is called more than once.
-                if (this.lastUrls[url] && Date.now() - this.lastUrls[url] < 3000) {
-                    // Function called more than once, stop.
-                    return;
-                }
-
-                if (!CoreCustomURLSchemes.isCustomURL(url)) {
-                    // Not a custom URL, ignore.
-                    return;
-                }
-
-                this.lastUrls[url] = Date.now();
-
-                CoreEvents.trigger(CoreEvents.APP_LAUNCHED_URL, { url });
-                CoreCustomURLSchemes.handleCustomURL(url).catch((error) => {
-                    CoreCustomURLSchemes.treatHandleCustomURLError(error);
-                });
-            });
-        };
-
         // "Expose" CoreWindow.open.
         win.openWindowSafely = (url: string, name?: string): void => {
             CoreWindow.open(url, name);

src/core/initializers/initialize-urlscheme.ts

@@ -0,0 +1,45 @@
+// (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 { CoreCustomURLSchemes } from '@services/urlschemes';
+import { NgZone } from '@singletons';
+import { CoreEvents } from '@singletons/events';
+
+export default async function(): Promise<void> {
+    const lastUrls: Record<string, number> = {};
+
+    // Handle app launched with a certain URL (custom URL scheme).
+    (<any> window).handleOpenURL = (url: string): void => {
+        // Execute the callback in the Angular zone, so change detection doesn't stop working.
+        NgZone.run(() => {
+            // First check that the URL hasn't been treated a few seconds ago. Sometimes this function is called more than once.
+            if (lastUrls[url] && Date.now() - lastUrls[url] < 3000) {
+                // Function called more than once, stop.
+                return;
+            }
+
+            if (!CoreCustomURLSchemes.isCustomURL(url)) {
+                // Not a custom URL, ignore.
+                return;
+            }
+
+            lastUrls[url] = Date.now();
+
+            CoreEvents.trigger(CoreEvents.APP_LAUNCHED_URL, { url });
+            CoreCustomURLSchemes.handleCustomURL(url).catch((error) => {
+                CoreCustomURLSchemes.treatHandleCustomURLError(error);
+            });
+        });
+    };
+}