// Copyright (c) 2012 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.

#include "content/renderer/notification_provider.h"

#include "base/string_util.h"
#include "content/common/desktop_notification_messages.h"
#include "content/common/view_messages.h"
#include "content/renderer/render_view_impl.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebURL.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebNotificationPermissionCallback.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebUserGestureIndicator.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"

using WebKit::WebDocument;
using WebKit::WebNotification;
using WebKit::WebNotificationPresenter;
using WebKit::WebNotificationPermissionCallback;
using WebKit::WebSecurityOrigin;
using WebKit::WebString;
using WebKit::WebURL;
using WebKit::WebUserGestureIndicator;

namespace content {


NotificationProvider::NotificationProvider(RenderViewImpl* render_view)
    : RenderViewObserver(render_view) {
}

NotificationProvider::~NotificationProvider() {
  manager_.DetachAll();
}

bool NotificationProvider::show(const WebNotification& notification) {
  int notification_id = manager_.RegisterNotification(notification);
  if (notification.isHTML())
    return ShowHTML(notification, notification_id);
  else
    return ShowText(notification, notification_id);
}

void NotificationProvider::cancel(const WebNotification& notification) {
  int id;
  bool id_found = manager_.GetId(notification, id);
  // Won't be found if the notification has already been closed by the user.
  if (id_found)
    Send(new DesktopNotificationHostMsg_Cancel(routing_id(), id));
}

void NotificationProvider::objectDestroyed(
    const WebNotification& notification) {
  int id;
  bool id_found = manager_.GetId(notification, id);
  // Won't be found if the notification has already been closed by the user.
  if (id_found)
    manager_.UnregisterNotification(id);
}

WebNotificationPresenter::Permission NotificationProvider::checkPermission(
    const WebSecurityOrigin& origin) {
  int permission;
  Send(new DesktopNotificationHostMsg_CheckPermission(
          routing_id(),
          GURL(origin.toString()),
          &permission));
  return static_cast<WebNotificationPresenter::Permission>(permission);
}

void NotificationProvider::requestPermission(
    const WebSecurityOrigin& origin,
    WebNotificationPermissionCallback* callback) {
  // We only request permission in response to a user gesture.
  if (!WebUserGestureIndicator::isProcessingUserGesture())
    return;

  int id = manager_.RegisterPermissionRequest(callback);

  Send(new DesktopNotificationHostMsg_RequestPermission(
      routing_id(), GURL(origin.toString()), id));
}

bool NotificationProvider::OnMessageReceived(const IPC::Message& message) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP(NotificationProvider, message)
    IPC_MESSAGE_HANDLER(DesktopNotificationMsg_PostDisplay, OnDisplay);
    IPC_MESSAGE_HANDLER(DesktopNotificationMsg_PostError, OnError);
    IPC_MESSAGE_HANDLER(DesktopNotificationMsg_PostClose, OnClose);
    IPC_MESSAGE_HANDLER(DesktopNotificationMsg_PostClick, OnClick);
    IPC_MESSAGE_HANDLER(DesktopNotificationMsg_PermissionRequestDone,
                        OnPermissionRequestComplete);
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()

  if (message.type() == ViewMsg_Navigate::ID)
    OnNavigate();  // Don't want to swallow the message.

  return handled;
}

bool NotificationProvider::ShowHTML(const WebNotification& notification,
                                    int id) {
  DCHECK(notification.isHTML());
  ShowDesktopNotificationHostMsgParams params;
  WebDocument document = render_view()->GetWebView()->mainFrame()->document();
  params.origin = GURL(document.securityOrigin().toString());
  params.is_html = true;
  params.contents_url = notification.url();
  params.notification_id = id;
  params.replace_id = notification.replaceId();
  return Send(new DesktopNotificationHostMsg_Show(routing_id(), params));
}

bool NotificationProvider::ShowText(const WebNotification& notification,
                                    int id) {
  DCHECK(!notification.isHTML());
  ShowDesktopNotificationHostMsgParams params;
  params.is_html = false;
  WebDocument document = render_view()->GetWebView()->mainFrame()->document();
  params.origin = GURL(document.securityOrigin().toString());
  params.icon_url = notification.iconURL();
  params.title = notification.title();
  params.body = notification.body();
  params.direction = notification.direction();
  params.notification_id = id;
  params.replace_id = notification.replaceId();
  return Send(new DesktopNotificationHostMsg_Show(routing_id(), params));
}

void NotificationProvider::OnDisplay(int id) {
  WebNotification notification;
  bool found = manager_.GetNotification(id, &notification);
  // |found| may be false if the WebNotification went out of scope in
  // the page before it was actually displayed to the user.
  if (found)
    notification.dispatchDisplayEvent();
}

void NotificationProvider::OnError(int id, const WebString& message) {
  WebNotification notification;
  bool found = manager_.GetNotification(id, &notification);
  // |found| may be false if the WebNotification went out of scope in
  // the page before the error occurred.
  if (found)
    notification.dispatchErrorEvent(message);
}

void NotificationProvider::OnClose(int id, bool by_user) {
  WebNotification notification;
  bool found = manager_.GetNotification(id, &notification);
  // |found| may be false if the WebNotification went out of scope in
  // the page before the associated toast was closed by the user.
  if (found) {
    notification.dispatchCloseEvent(by_user);
    manager_.UnregisterNotification(id);
  }
}

void NotificationProvider::OnClick(int id) {
  WebNotification notification;
  bool found = manager_.GetNotification(id, &notification);
  // |found| may be false if the WebNotification went out of scope in
  // the page before the associated toast was clicked on.
  if (found)
    notification.dispatchClickEvent();
}

void NotificationProvider::OnPermissionRequestComplete(int id) {
  WebNotificationPermissionCallback* callback = manager_.GetCallback(id);
  DCHECK(callback);
  callback->permissionRequestComplete();
  manager_.OnPermissionRequestComplete(id);
}

void NotificationProvider::OnNavigate() {
  manager_.Clear();
}

}  // namespace content