Add check permissions

Author: FreePhoenix888

src/check-permissions.ts

@@ -0,0 +1,20 @@
+import { Device } from '@capacitor/device';
+import { PushNotifications } from '@capacitor/push-notifications';
+import {PermissionState} from '@capacitor/core';
+
+export async function checkPermissions(): Promise<CheckPermissionsResult> {
+  const { platform } = await Device.getInfo();
+  let permissionState: CheckPermissionsResult['permissionState'];
+  if (platform === 'web') {
+   permissionState = Notification.permission;
+  } else {
+    let permissionsStatus = await PushNotifications.checkPermissions();
+    permissionState = permissionsStatus.receive;
+  }
+
+  return {permissionState}
+}
+
+export interface CheckPermissionsResult {
+   permissionState: NotificationPermission|PermissionState;
+}