// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module content.mojom;

import "mojo/public/mojom/base/string16.mojom";
import "mojo/public/mojom/base/time.mojom";
import "services/network/public/mojom/cookie_manager.mojom";
import "third_party/blink/public/platform/modules/fetch/fetch_api_request.mojom";
import "third_party/blink/public/platform/modules/notifications/notification.mojom";
import "third_party/blink/public/platform/modules/payments/payment_app.mojom";
import "third_party/blink/public/mojom/fetch/fetch_api_response.mojom";
import "third_party/blink/public/mojom/message_port/message_port.mojom";
import "third_party/blink/public/mojom/service_worker/dispatch_fetch_event_params.mojom";
import "third_party/blink/public/mojom/service_worker/service_worker.mojom";
import "third_party/blink/public/mojom/service_worker/service_worker_client.mojom";
import "third_party/blink/public/mojom/service_worker/service_worker_event_status.mojom";
import "third_party/blink/public/mojom/service_worker/service_worker_fetch_response_callback.mojom";
import "third_party/blink/public/mojom/service_worker/service_worker_object.mojom";
import "third_party/blink/public/mojom/service_worker/service_worker_registration.mojom";
import "url/mojom/origin.mojom";
import "url/mojom/url.mojom";

// TODO(peter): Move this to Blink.
struct BackgroundFetchSettledFetch {
  blink.mojom.FetchAPIRequest request;
  blink.mojom.FetchAPIResponse? response;
};

enum BackgroundFetchState {
  PENDING,
  SUCCEEDED,
  FAILED
};

struct ExtendableMessageEvent {
  blink.mojom.TransferableMessage message;
  url.mojom.Origin source_origin;
  // Exactly one of |source_info_for_client| and
  // |source_info_for_service_worker| should be non-null.
  blink.mojom.ServiceWorkerClientInfo? source_info_for_client;
  blink.mojom.ServiceWorkerObjectInfo? source_info_for_service_worker;
};

// The number of seconds for which a 'push' event should be allowed to run.
// This is not in the spec but for a Chrome-specific timeout. Each
// event dispatched to service workers has a 5 minute timeout in the Chrome
// implementation, but this makes the timeout for push events shorter.
const int32 kPushEventTimeoutSeconds = 90;

// An interface for talking to a running service worker thread. The browser
// process uses this interface to request the renderer to do things like
// dispatch events to the service worker. This interface is bound on the
// service worker thread and is implemented by ServiceWorkerContextClient.
//
// This is the master interface for the Mojo message pipe between the browser
// process and the service worker thread in the renderer process. Other service
// worker-related interfaces bound on the service worker thread are associated
// with this interface. These include:
// - ServiceWorkerHost for this service worker.
// - ServiceWorkerRegistrationObject(Host) for this service worker's
//   self.registration property.
// - ServiceWorkerObjects(Host) for that registration's properties.
//
// A similar (but non-associated) interface is ControllerServiceWorker. That
// interface is used by service worker clients (inside renderer processes) to
// talk directly to their controller service worker, without going through the
// browser.
//
// USAGE TIP: Those DispatchEvent* messages expecting a
// (blink.mojom.ServiceWorkerEventStatus, mojo_base.mojom.Time) callback are
// considered 'simple events'. ServiceWorkerVersion::CreateSimpleEventCallback
// can be used to create the callback for these.
interface ServiceWorker {
  // The first message sent on this interface. It is used to associate service
  // worker-related interfaces together on the service worker thread, as
  // ServiceWorker is the first interface available on the
  // service worker thread. It establishes the |service_worker_host| connection
  // and passes information used to populate
  // ServiceWorkerGlobalScope#registration object. JavaScript execution of the
  // service worker does not start until this message is received.
  InitializeGlobalScope(
      associated blink.mojom.ServiceWorkerHost service_worker_host,
      blink.mojom.ServiceWorkerRegistrationObjectInfo registration_info);

  DispatchInstallEvent()
      => (blink.mojom.ServiceWorkerEventStatus status,
          bool has_fetch_handler,
          mojo_base.mojom.Time dispatch_event_time);
  DispatchActivateEvent()
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);

  // These methods dispatch to the ServiceWorkerGlobalScope the events listed on
  // https://wicg.github.io/background-fetch/#service-worker-global-events.
  // The callbacks are called once the event handler has run and waitUntil()
  // promise has settled. |developer_id| and |unique_id| are documented in
  // content::BackgroundFetchRegistrationId.
  DispatchBackgroundFetchAbortEvent(string developer_id,
                                    string unique_id,
                                    array<BackgroundFetchSettledFetch> fetches)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);
  DispatchBackgroundFetchClickEvent(string developer_id,
                                    BackgroundFetchState state)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);
  DispatchBackgroundFetchFailEvent(string developer_id,
                                   string unique_id,
                                   array<BackgroundFetchSettledFetch> fetches)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);
  DispatchBackgroundFetchedEvent(string developer_id,
                                 string unique_id,
                                 array<BackgroundFetchSettledFetch> fetches)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);

  // Dispatches the cookie change events in the Async Cookie API specification.
  // https://github.com/WICG/cookie-store/
  // The callback is called once the event handler has run and the waitUntil()
  // promise has settled.
  DispatchCookieChangeEvent(
      network.mojom.CanonicalCookie cookie,
      network.mojom.CookieChangeCause cause)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);

  // The Dispatch*FetchEvent() callback is called once the event finishes,
  // which means the event handler ran and all outstanding respondWith() and
  // waitUntil() promises have settled. |response_callback| is called once the
  // promise to respondWith() settles, or when the event handler ran without
  // calling respondWith().
  DispatchFetchEvent(
      blink.mojom.DispatchFetchEventParams params,
      blink.mojom.ServiceWorkerFetchResponseCallback response_callback)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);

  DispatchNotificationClickEvent(
      string notification_id,
      blink.mojom.NotificationData notification_data,
      int32 action_index,
      mojo_base.mojom.String16? reply)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);
  DispatchNotificationCloseEvent(
      string notification_id,
      blink.mojom.NotificationData notification_data)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);
  // The payload of a push message can be valid with content, valid with empty
  // content, or null.
  DispatchPushEvent(string? payload)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);
  // Arguments are passed to the event handler as parameters of SyncEvent.
  // Ref: https://wicg.github.io/BackgroundSync/spec/#sync-event
  // S13nServiceWorker: |timeout| is the amount of time to allow this event to
  // finish.
  // Non-S13nServiceWorker: |timeout| is just ignored.
  DispatchSyncEvent(string id,
                    bool last_chance,
                    mojo_base.mojom.TimeDelta timeout)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);
  DispatchAbortPaymentEvent(
      payments.mojom.PaymentHandlerResponseCallback result_of_abort_payment)
          => (blink.mojom.ServiceWorkerEventStatus status,
              mojo_base.mojom.Time dispatch_event_time);
  DispatchCanMakePaymentEvent(
      payments.mojom.CanMakePaymentEventData event_data,
      payments.mojom.PaymentHandlerResponseCallback result_of_can_make_payment)
          => (blink.mojom.ServiceWorkerEventStatus status,
              mojo_base.mojom.Time dispatch_event_time);
  DispatchPaymentRequestEvent(
      payments.mojom.PaymentRequestEventData request_data,
      payments.mojom.PaymentHandlerResponseCallback response_callback)
          => (blink.mojom.ServiceWorkerEventStatus status,
              mojo_base.mojom.Time dispatch_event_time);
  DispatchExtendableMessageEvent(ExtendableMessageEvent event)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);

  // TODO(crbug.com/869714): Remove this code for long living service workers
  // when Android Messages no longer requires it.
  DispatchExtendableMessageEventWithCustomTimeout(ExtendableMessageEvent event,
                                 mojo_base.mojom.TimeDelta timeout)
      => (blink.mojom.ServiceWorkerEventStatus status,
          mojo_base.mojom.Time dispatch_event_time);

  // Pings the service worker to check if it is responsive. If the callback is
  // not called within a certain period of time, the browser will terminate the
  // worker.
  Ping() => ();

  // S13nServiceWorker:
  // Lets the idle timer request termination immediately after all inflight
  // events are handled without delay.
  SetIdleTimerDelayToZero();
};