docs(push): Add descriptions to push notification methods (#3036)

core/src/core-plugin-definitions.ts

@@ -1599,21 +1599,74 @@ export interface NotificationChannelList {
 }
 
 export interface PushNotificationsPlugin extends Plugin {
+  /**
+   * Register the app to receive push notifications.
+   * Will trigger registration event with the push token 
+   * or registrationError if there was some problem.
+   * Doesn't prompt the user for notification permissions, use requestPermission() first.
+   */
   register(): Promise<void>;
+  /**
+   * On iOS it prompts the user to allow displaying notifications
+   * and return if the permission was granted or not.
+   * On Android there is no such prompt, so just return as granted.
+   */
   requestPermission(): Promise<NotificationPermissionResponse>;
+  /**
+   * Returns the notifications that are visible on the notifications screen.
+   */
   getDeliveredNotifications(): Promise<PushNotificationDeliveredList>;
+  /**
+   * Removes the specified notifications from the notifications screen.
+   * @param delivered list of delivered notifications.
+   */
   removeDeliveredNotifications(delivered: PushNotificationDeliveredList): Promise<void>;
+  /**
+   * Removes all the notifications from the notifications screen.
+   */
   removeAllDeliveredNotifications(): Promise<void>;
+  /**
+   * On Android O or newer (SDK 26+) creates a notification channel.
+   * @param channel to create.
+   */
   createChannel(channel: NotificationChannel): Promise<void>;
+  /**
+   * On Android O or newer (SDK 26+) deletes a notification channel.
+   * @param channel to delete.
+   */
   deleteChannel(channel: NotificationChannel): Promise<void>;
+  /**
+   * On Android O or newer (SDK 26+) list the available notification channels.
+   */
   listChannels(): Promise<NotificationChannelList>;
+  /**
+   * Event called when the push notification registration finished without problems.
+   * Provides the push notification token.
+   * @param eventName registration.
+   * @param listenerFunc callback with the push token.
+   */
   addListener(eventName: 'registration', listenerFunc: (token: PushNotificationToken) => void): PluginListenerHandle;
+  /**
+   * Event called when the push notification registration finished with problems.
+   * Provides an error with the registration problem.
+   * @param eventName registrationError.
+   * @param listenerFunc callback with the registration error.
+   */
   addListener(eventName: 'registrationError', listenerFunc: (error: any) => void): PluginListenerHandle;
+  /**
+   * Event called when the device receives a push notification.
+   * @param eventName pushNotificationReceived.
+   * @param listenerFunc callback with the received notification.
+   */
   addListener(eventName: 'pushNotificationReceived', listenerFunc: (notification: PushNotification) => void): PluginListenerHandle;
+  /**
+   * Event called when an action is performed on a pusn notification.
+   * @param eventName pushNotificationActionPerformed.
+   * @param listenerFunc callback with the notification action.
+   */
   addListener(eventName: 'pushNotificationActionPerformed', listenerFunc: (notification: PushNotificationActionPerformed) => void): PluginListenerHandle;
-
   /**
-   * Remove all native listeners for this plugin
+   * Remove all native listeners for this plugin.
    */
   removeAllListeners(): void;
 }