/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

interface nsIPrincipal;

/**
 * A push subscription, passed as an argument to a subscription callback.
 * Similar to the `PushSubscription` WebIDL interface.
 */
[scriptable, uuid(1de32d5c-ea88-4c9e-9626-b032bd87f415)]
interface nsIPushSubscription : nsISupports
{
  readonly attribute DOMString endpoint;
  readonly attribute long long pushCount;
  readonly attribute long long lastPush;
  readonly attribute long quota;

  bool quotaApplies();
  bool isExpired();

  void getKey(in DOMString name,
              [optional] out uint32_t keyLen,
              [array, size_is(keyLen), retval] out uint8_t key);
};

/**
 * Called by methods that return a push subscription. A non-success
 * |status| indicates that there was a problem returning the
 * subscription, and the |subscription| argument should be ignored. Otherwise,
 * |subscription| will point to a valid push subscription, or |null| if the
 * subscription does not exist.
 */
 [scriptable, uuid(1799c074-9d52-46b0-ab3c-c09790732f6f), function]
 interface nsIPushSubscriptionCallback : nsISupports
 {
   void onPushSubscription(in nsresult status,
                           in nsIPushSubscription subscription);
 };

/**
 * Called by |unsubscribe|. A non-success |status| indicates that there was
 * a problem unsubscribing, and the |success| argument should be ignored.
 * Otherwise, |success| is true if unsubscribing was successful, and false if
 * the subscription does not exist.
 */
[scriptable, uuid(d574118f-61a9-4270-b1f6-4461aa85c4f5), function]
interface nsIUnsubscribeResultCallback : nsISupports
{
  void onUnsubscribe(in nsresult status, in bool success);
};

/**
 * Called by |clearForDomain|. A non-success |status| indicates that there was
 * a problem clearing subscriptions for the given domain.
 */
[scriptable, uuid(bd47b38e-8bfa-4f92-834e-832a4431e05e), function]
interface nsIPushClearResultCallback : nsISupports
{
  void onClear(in nsresult status);
};

/**
 * A service for components to subscribe and receive push messages from web
 * services. This functionality is exposed to content via the Push DOM API,
 * which uses service workers. This interface exists to support the DOM API,
 * and allows privileged code to receive messages without migrating to service
 * workers.
 */
[scriptable, uuid(678ef584-bf25-47aa-ac84-03efc0865b68)]
interface nsIPushService : nsISupports
{
  /** Observer topic names, exported for convenience. */
  readonly attribute DOMString pushTopic;
  readonly attribute DOMString subscriptionChangeTopic;

  /**
   * Creates a push subscription for the given |scope| URL and |principal|.
   * If a subscription already exists for this |(scope, principal)| pair,
   * the callback will receive the existing record as the second argument.
   *
   * The |endpoint| property of the subscription record is a URL string
   * that can be used to send push messages to subscribers.
   *
   * Each incoming message fires a `push-message` observer notification, with
   * an `nsIPushMessage` as the subject and the |scope| as the data.
   *
   * If the server drops a subscription, a `push-subscription-change` observer
   * will be fired, with the subject set to `null` and the data set to |scope|.
   * Servers may drop subscriptions at any time, so callers should recreate
   * subscriptions if desired.
   */
  void subscribe(in DOMString scope, in nsIPrincipal principal,
                 in nsIPushSubscriptionCallback callback);

  /**
   * Removes a push subscription for the given |scope|.
   */
  void unsubscribe(in DOMString scope, in nsIPrincipal principal,
                   in nsIUnsubscribeResultCallback callback);

  /**
   * Retrieves the subscription record associated with the given
   * |(scope, principal)| pair. If the subscription does not exist, the
   * callback will receive |null| as the second argument.
   */
  void getSubscription(in DOMString scope, in nsIPrincipal principal,
                       in nsIPushSubscriptionCallback callback);

  /**
   * Drops every subscription for the given |domain|, or all domains if
   * |domain| is "*".
   */
  void clearForDomain(in DOMString domain,
                      in nsIPushClearResultCallback callback);
};

[scriptable, uuid(a2555e70-46f8-4b52-bf02-d978b979d143)]
interface nsIPushQuotaManager : nsISupports
{
  /**
   * Informs the quota manager that a notification
   * for the given origin has been shown. Used to
   * determine if push quota should be relaxed.
   */
  void notificationForOriginShown(in string origin);

  /**
   * Informs the quota manager that a notification
   * for the given origin has been closed. Used to
   * determine if push quota should be relaxed.
   */
  void notificationForOriginClosed(in string origin);
};
