[Presentation API] 1-UA presentation support + presenter APIs.

chrome/browser/media/router/one_ua_presentation_router.cc

+// Copyright 2015 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 "chrome/browser/media/router/one_ua_presentation_router.h"
+
+using content::PresentationSessionInfo;
+using content::PresenterSessionAvailableCallback;
+
+namespace media_router {
+
+OneUAPresentationRouter::~OneUAPresentationRouter() {}
+
+void OneUAPresentationRouter::RegisterPresenter(
+    const std::string& presentation_id,
+    const RenderFrameHostId& presenter_frame_id) {
+  DCHECK(!ContainsKey(presenter_frames_, presenter_frame_id));
+  presenter_frames_[presenter_frame_id] = presentation_id;
+
+  auto* presentation_info = GetOrCreateOneUAPresentationInfo(presentation_id);
+  presentation_info->presenter_frame_id = presenter_frame_id;
+  // We wait until the controller side has registered before setting up the
+  // route.
+}
+
+void OneUAPresentationRouter::UnregisterPresenter(
+    const RenderFrameHostId& presenter_frame_id) {
+  DCHECK(ContainsKey(presenter_frames_, presenter_frame_id));
+  auto it = presenter_frames_.find(presenter_frame_id);
+  std::string presentation_id = it->second;
+  presenter_frames_.erase(it);
+
+  auto* presentation_info = GetOneUAPresentationInfo(presentation_id);
+  DCHECK(presentation_info);
+  DCHECK(presenter_frame_id == presentation_info->presenter_frame_id);
+  RemovePresenterAndNotifyStateChange(presentation_info);
+  if (presentation_info->IsEmpty())
+    one_ua_presentations_.erase(presentation_id);
+}
+
+void OneUAPresentationRouter::RegisterController(
+    const content::PresentationSessionInfo& session,
+    const RenderFrameHostId& controller_frame_id) {
+  const std::string& presentation_id = session.presentation_id;
+  auto* presentation_info = GetOrCreateOneUAPresentationInfo(presentation_id);
+
+  auto& route = presentation_info->route;
+
+  // Check that this (presentation, controller) is not already registered.
+  DCHECK(!route.controller);
+  DCHECK(!route.presenter);
+
+  route.controller.reset(
+      new OneUAPresentationSession(controller_frame_id, session));
+  content::PresentationSessionInfo presenter_session(std::string(),
+                                                     presentation_id);
+  route.presenter.reset(
+      new OneUAPresentationSession(controller_frame_id, presenter_session));
+
+  // Resolve pending getSession() request.
+  // Note: session objects for presenters do not contain presentation URLs.
+  if (!presentation_info->session_callback.is_null()) {
+    presentation_info->session_callback.Run(presenter_session);
+    presentation_info->session_callback.Reset();
+  }
+}
+
+void OneUAPresentationRouter::UnregisterController(
+    const std::string& presentation_id,
+    const RenderFrameHostId& controller_frame_id) {
+  auto* presentation_info = GetOneUAPresentationInfo(presentation_id);
+  DCHECK(presentation_info);
+  DCHECK(controller_frame_id ==
+         presentation_info->route.controller->controller_frame_id);
+  RemoveControllerAndNotifyStateChange(presentation_info);
+
+  if (presentation_info->IsEmpty())
+    one_ua_presentations_.erase(presentation_id);
+}
+
+bool OneUAPresentationRouter::IsPresenter(
+    const RenderFrameHostId& frame_id) const {
+  return ContainsKey(presenter_frames_, frame_id);
+}
+
+bool OneUAPresentationRouter::IsController(
+    const std::string& presentation_id,
+    const RenderFrameHostId& frame_id) const {
+  auto* presentation_info = GetOneUAPresentationInfo(presentation_id);
+  if (!presentation_info)
+    return false;
+
+  const auto& route = presentation_info->route;
+  if (!route.controller)
+    return false;
+  return frame_id == route.controller->controller_frame_id;
+}
+
+void OneUAPresentationRouter::GetSinglePresenterSession(
+    const RenderFrameHostId& presenter_frame_id,
+    const PresenterSessionAvailableCallback& callback) {
+  DCHECK(!callback.is_null());
+  DCHECK(IsPresenter(presenter_frame_id));
+
+  const std::string& presentation_id = presenter_frames_[presenter_frame_id];
+  auto* presentation_info = GetOneUAPresentationInfo(presentation_id);
+  DCHECK(presentation_info);
+  DCHECK(presenter_frame_id == presentation_info->presenter_frame_id);
+
+  // Resolve with the first route.
+  const auto& route = presentation_info->route;
+  if (route.presenter) {
+    callback.Run(route.presenter->session);
+    return;
+  } else {
+    presentation_info->session_callback = callback;
+  }
+}
+
+std::vector<content::PresentationSessionInfo>
+OneUAPresentationRouter::GetPresenterSessions(
+    const RenderFrameHostId& presenter_frame_id) const {
+  DCHECK(IsPresenter(presenter_frame_id));
+
+  auto it = presenter_frames_.find(presenter_frame_id);
+  DCHECK(it != presenter_frames_.end());
+  const std::string& presentation_id = it->second;
+  auto* presentation_info = GetOneUAPresentationInfo(presentation_id);
+  DCHECK(presentation_info);
+
+  std::vector<content::PresentationSessionInfo> sessions;
+  // TODO(imcheng): Support multiple controllers.
+  if (presentation_info->route.presenter)
+    sessions.push_back(presentation_info->route.presenter->session);
+  return sessions;
+}
+
+void OneUAPresentationRouter::SendMessage(
+    const PresentationSessionInfo& session,
+    scoped_ptr<content::PresentationSessionMessage> message,
+    const content::SendMessageCallback& callback) {
+  const std::string& presentation_id = session.presentation_id;
+  auto* presentation_info = GetOneUAPresentationInfo(presentation_id);
+  if (!presentation_info) {
+    LOG(ERROR) << "SendMessage: Unknown 1UA presentation " << presentation_id;
+    callback.Run(false);
+    return;
+  }
+
+  bool from_presenter = session.presentation_url.empty();
+  auto& route = presentation_info->route;
+  // From presenter to controller.
+  if (from_presenter) {
+    auto* controller = route.controller.get();
+    if (controller && !controller->message_callback.is_null()) {
+      ScopedVector<content::PresentationSessionMessage> messages;
+      messages.push_back(message.release());
+      controller->message_callback.Run(messages.Pass(), true);
+    }
+  } else {
+    auto* presenter = route.presenter.get();
+    // From controller to presenter.
+    if (presenter && !presenter->message_callback.is_null()) {
+      ScopedVector<content::PresentationSessionMessage> messages;
+      messages.push_back(message.release());
+      presenter->message_callback.Run(messages.Pass(), true);
+    }
+  }
+
+  callback.Run(true);
+}
+
+void OneUAPresentationRouter::ListenForMessages(
+    const PresentationSessionInfo& session,
+    const content::PresentationSessionMessageCallback& callback) {
+  const std::string& presentation_id = session.presentation_id;
+  auto* presentation_info = GetOneUAPresentationInfo(presentation_id);
+  if (!presentation_info) {
+    LOG(ERROR) << "ListenForMessages: Unknown 1UA presentation "
+               << presentation_id;
+    return;
+  }
+
+  bool from_presenter = session.presentation_url.empty();
+  auto& route = presentation_info->route;
+  if (from_presenter) {
+    auto* presenter = route.presenter.get();
+    if (!presenter) {
+      LOG(ERROR) << "ListenForMessages: presenter frame not found for "
+                 << presentation_id;
+      return;
+    }
+    DVLOG_IF(2, !presenter->message_callback.is_null())
+        << "Overwriting presenter frame message callback for "
+        << presentation_id;
+    presenter->message_callback = callback;
+  } else {
+    auto* controller = route.controller.get();
+    if (!controller) {
+      LOG(ERROR) << "ListenForMessages: controller frame not found for "
+                 << presentation_id;
+      return;
+    }
+    DVLOG_IF(2, !controller->message_callback.is_null())
+        << "Overwriting controller frame message callback for "
+        << presentation_id;
+    controller->message_callback = callback;
+  }
+}
+
+void OneUAPresentationRouter::ListenForStateChanges(
+    const PresentationSessionInfo& session,
+    const content::SessionStateChangedCallback& callback) {
+  const std::string& presentation_id = session.presentation_id;
+  auto* presentation_info = GetOneUAPresentationInfo(presentation_id);
+  if (!presentation_info) {
+    LOG(ERROR) << "ListenForMessages: Unknown 1UA presentation "
+               << presentation_id;
+    return;
+  }
+
+  bool from_presenter = session.presentation_url.empty();
+  auto& route = presentation_info->route;
+  if (from_presenter) {
+    auto* presenter = route.presenter.get();
+    if (!presenter) {
+      LOG(ERROR) << "ListenForMessages: presenter frame not found for "
+                 << presentation_id;
+      return;
+    }
+    DVLOG_IF(2, !presenter->state_change_callback.is_null())
+        << "Overwriting presenter frame state change callback for "
+        << presentation_id;
+    presenter->state_change_callback = callback;
+  } else {
+    auto* controller = route.controller.get();
+    if (!controller) {
+      LOG(ERROR) << "ListenForMessages: controller frame not found for "
+                 << presentation_id;
+      return;
+    }
+    DVLOG_IF(2, !controller->state_change_callback.is_null())
+        << "Overwriting controller frame state change callback for "
+        << presentation_id;
+    controller->state_change_callback = callback;
+  }
+}
+
+void OneUAPresentationRouter::Reset(const RenderFrameHostId& frame_id) {
+  if (IsPresenter(frame_id))
+    UnregisterPresenter(frame_id);
+
+  for (auto it = one_ua_presentations_.begin();
+       it != one_ua_presentations_.end();
+       /* no-op */) {
+    auto* presentation_info = it->second;
+    auto* controller = presentation_info->route.controller.get();
+    if (controller && controller->controller_frame_id == frame_id) {
+      RemovePresenterAndNotifyStateChange(presentation_info);
+      if (presentation_info->IsEmpty())
+        one_ua_presentations_.erase(it++);
+      else
+        ++it;
+    } else {
+      ++it;
+    }
+  }
+}
+
+OneUAPresentationRouter::OneUAPresentationRouter() {}
+
+void OneUAPresentationRouter::RemovePresenterAndNotifyStateChange(
+    OneUAPresentationInfo* presentation_info) {
+  presentation_info->presenter_frame_id = RenderFrameHostId();
+  presentation_info->session_callback.Reset();
+
+  auto& route = presentation_info->route;
+  if (route.presenter) {
+    route.presenter.reset();
+    auto& controller = route.controller;
+    if (controller && !controller->state_change_callback.is_null()) {
+      controller->state_change_callback.Run(
+          controller->session,
+          content::PRESENTATION_SESSION_STATE_DISCONNECTED);
+    }
+  }
+}
+
+void OneUAPresentationRouter::RemoveControllerAndNotifyStateChange(
+    OneUAPresentationInfo* presentation_info) {
+  auto& route = presentation_info->route;
+  route.controller.reset();
+
+  auto& presenter = route.presenter;
+  if (presenter && !presenter->state_change_callback.is_null()) {
+    presenter->state_change_callback.Run(
+        presenter->session, content::PRESENTATION_SESSION_STATE_DISCONNECTED);
+  }
+}
+
+OneUAPresentationRouter::OneUAPresentationInfo*
+OneUAPresentationRouter::GetOrCreateOneUAPresentationInfo(
+    const std::string& presentation_id) {
+  OneUAPresentationInfo* info = nullptr;
+  auto presentation_info_it = one_ua_presentations_.find(presentation_id);
+  if (presentation_info_it == one_ua_presentations_.end()) {
+    info = new OneUAPresentationInfo;
+    one_ua_presentations_.insert(presentation_id, make_scoped_ptr(info));
+  } else {
+    info = presentation_info_it->second;
+  }
+  DCHECK(info);
+  return info;
+}
+
+OneUAPresentationRouter::OneUAPresentationInfo*
+OneUAPresentationRouter::GetOneUAPresentationInfo(
+    const std::string& presentation_id) const {
+  OneUAPresentationInfo* info = nullptr;
+  auto presentation_info_it = one_ua_presentations_.find(presentation_id);
+  return presentation_info_it == one_ua_presentations_.end()
+             ? nullptr
+             : presentation_info_it->second;
+}
+
+OneUAPresentationRouter::OneUAPresentationSession::OneUAPresentationSession(
+    const RenderFrameHostId& controller_frame_id,
+    const content::PresentationSessionInfo& session)
+    : controller_frame_id(controller_frame_id), session(session) {}
+
+OneUAPresentationRouter::OneUAPresentationSession::~OneUAPresentationSession() {
+}
+
+OneUAPresentationRouter::OneUAPresentationRoute::OneUAPresentationRoute() {}
+
+OneUAPresentationRouter::OneUAPresentationRoute::~OneUAPresentationRoute() {}
+
+OneUAPresentationRouter::OneUAPresentationInfo::OneUAPresentationInfo() {}
+
+OneUAPresentationRouter::OneUAPresentationInfo::~OneUAPresentationInfo() {}
+
+bool OneUAPresentationRouter::OneUAPresentationInfo::IsEmpty() const {
+  return !route.presenter && !route.controller;
+}
+
+}  // namespace media_router