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// 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 "components/media_router/browser/media_router_base.h"
#include <memory>
#include "base/bind.h"
#include "base/guid.h"
#include "build/build_config.h"
#include "content/public/browser/browser_thread.h"
using blink::mojom::PresentationConnectionState;
namespace media_router {
// A MediaRoutesObserver that maintains state about the current set of media
// routes.
//
// TODO(crbug.com/1297324): This observer is used to implement
// HasJoinableRoute() and GetRoute(), which are used internally by
// MediaRouterMojoImpl; it would be simpler to move route tracking to a separate
// object owned by MRMI, and then MediaRouterBase could likely be deleted
// entirely.
class MediaRouterBase::InternalMediaRoutesObserver
: public MediaRoutesObserver {
public:
explicit InternalMediaRoutesObserver(MediaRouter* router)
: MediaRoutesObserver(router) {}
InternalMediaRoutesObserver(const InternalMediaRoutesObserver&) = delete;
InternalMediaRoutesObserver& operator=(const InternalMediaRoutesObserver&) =
delete;
~InternalMediaRoutesObserver() override {}
// MediaRoutesObserver
void OnRoutesUpdated(const std::vector<MediaRoute>& routes) override {
current_routes_ = routes;
}
const std::vector<MediaRoute>& current_routes() const {
return current_routes_;
}
private:
std::vector<MediaRoute> current_routes_;
};
MediaRouterBase::~MediaRouterBase() {
CHECK(!internal_routes_observer_);
}
base::CallbackListSubscription
MediaRouterBase::AddPresentationConnectionStateChangedCallback(
const MediaRoute::Id& route_id,
const content::PresentationConnectionStateChangedCallback& callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
auto& callbacks = presentation_connection_state_callbacks_[route_id];
if (!callbacks) {
callbacks = std::make_unique<PresentationConnectionStateChangedCallbacks>();
callbacks->set_removal_callback(base::BindRepeating(
&MediaRouterBase::OnPresentationConnectionStateCallbackRemoved,
base::Unretained(this), route_id));
}
return callbacks->Add(callback);
}
IssueManager* MediaRouterBase::GetIssueManager() {
return &issue_manager_;
}
std::vector<MediaRoute> MediaRouterBase::GetCurrentRoutes() const {
return internal_routes_observer_->current_routes();
}
std::unique_ptr<media::FlingingController>
MediaRouterBase::GetFlingingController(const MediaRoute::Id& route_id) {
return nullptr;
}
#if !BUILDFLAG(IS_ANDROID)
void MediaRouterBase::GetMediaController(
const MediaRoute::Id& route_id,
mojo::PendingReceiver<mojom::MediaController> controller,
mojo::PendingRemote<mojom::MediaStatusObserver> observer) {}
base::Value MediaRouterBase::GetLogs() const {
return base::Value();
}
#endif // !BUILDFLAG(IS_ANDROID)
MediaRouterBase::MediaRouterBase() : initialized_(false) {}
// static
std::string MediaRouterBase::CreatePresentationId() {
return "mr_" + base::GenerateGUID();
}
void MediaRouterBase::NotifyPresentationConnectionStateChange(
const MediaRoute::Id& route_id,
PresentationConnectionState state) {
// We should call NotifyPresentationConnectionClose() for the CLOSED state.
DCHECK_NE(state, PresentationConnectionState::CLOSED);
auto it = presentation_connection_state_callbacks_.find(route_id);
if (it == presentation_connection_state_callbacks_.end())
return;
it->second->Notify(content::PresentationConnectionStateChangeInfo(state));
}
void MediaRouterBase::NotifyPresentationConnectionClose(
const MediaRoute::Id& route_id,
blink::mojom::PresentationConnectionCloseReason reason,
const std::string& message) {
auto it = presentation_connection_state_callbacks_.find(route_id);
if (it == presentation_connection_state_callbacks_.end())
return;
content::PresentationConnectionStateChangeInfo info(
PresentationConnectionState::CLOSED);
info.close_reason = reason;
info.message = message;
it->second->Notify(info);
}
bool MediaRouterBase::HasJoinableRoute() const {
return !(internal_routes_observer_->current_routes().empty());
}
const MediaRoute* MediaRouterBase::GetRoute(
const MediaRoute::Id& route_id) const {
const auto& routes = internal_routes_observer_->current_routes();
auto it = std::find_if(routes.begin(), routes.end(),
[&route_id](const MediaRoute& route) {
return route.media_route_id() == route_id;
});
return it == routes.end() ? nullptr : &*it;
}
void MediaRouterBase::Initialize() {
DCHECK(!initialized_);
// The observer calls virtual methods on MediaRouter; it must be created
// outside of the ctor
internal_routes_observer_ =
std::make_unique<InternalMediaRoutesObserver>(this);
initialized_ = true;
}
void MediaRouterBase::OnPresentationConnectionStateCallbackRemoved(
const MediaRoute::Id& route_id) {
auto it = presentation_connection_state_callbacks_.find(route_id);
if (it != presentation_connection_state_callbacks_.end() &&
it->second->empty()) {
presentation_connection_state_callbacks_.erase(route_id);
}
}
void MediaRouterBase::Shutdown() {
// The observer calls virtual methods on MediaRouter; it must be destroyed
// outside of the dtor
internal_routes_observer_.reset();
}
base::Value MediaRouterBase::GetState() const {
NOTREACHED() << "Should not invoke MediaRouterBase::GetState()";
return base::Value(base::Value::Type::DICTIONARY);
}
void MediaRouterBase::GetProviderState(
mojom::MediaRouteProviderId provider_id,
mojom::MediaRouteProvider::GetStateCallback callback) const {
NOTREACHED() << "Should not invoke MediaRouterBase::GetProviderState()";
std::move(callback).Run(mojom::ProviderStatePtr());
}
} // namespace media_router
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