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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_CAST_RECEIVER_BROWSER_RUNTIME_APPLICATION_DISPATCHER_IMPL_H_
#define COMPONENTS_CAST_RECEIVER_BROWSER_RUNTIME_APPLICATION_DISPATCHER_IMPL_H_
#include <memory>
#include "base/containers/flat_map.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/raw_ref.h"
#include "base/sequence_checker.h"
#include "components/cast_receiver/browser/application_client.h"
#include "components/cast_receiver/browser/public/application_config.h"
#include "components/cast_receiver/browser/public/runtime_application_dispatcher.h"
#include "components/cast_receiver/browser/runtime_application_base.h"
#include "components/cast_receiver/browser/streaming_runtime_application.h"
#include "components/cast_receiver/browser/web_runtime_application.h"
#include "components/cast_streaming/common/public/app_ids.h"
namespace cast_receiver {
template <typename TEmbedderApplication>
class RuntimeApplicationDispatcherImpl
: public RuntimeApplicationDispatcher<TEmbedderApplication> {
public:
// |application_client| is expected to persist for the lifetime of this
// instance.
explicit RuntimeApplicationDispatcherImpl(
ApplicationClient& application_client);
~RuntimeApplicationDispatcherImpl() override = default;
RuntimeApplicationDispatcherImpl(RuntimeApplicationDispatcherImpl& other) =
delete;
RuntimeApplicationDispatcherImpl& operator=(
RuntimeApplicationDispatcherImpl& other) = delete;
private:
using EmbedderApplicationFactory = typename RuntimeApplicationDispatcher<
TEmbedderApplication>::EmbedderApplicationFactory;
// RuntimeApplicationDispatcher implementation.
TEmbedderApplication* CreateApplication(
std::string session_id,
ApplicationConfig app_config,
EmbedderApplicationFactory factory) override;
TEmbedderApplication* GetApplication(const std::string& session_id) override;
std::unique_ptr<TEmbedderApplication> DestroyApplication(
const std::string& session_id) override;
SEQUENCE_CHECKER(sequence_checker_);
raw_ref<ApplicationClient> const application_client_;
base::flat_map<std::string, std::unique_ptr<TEmbedderApplication>>
loaded_apps_;
};
template <typename TEmbedderApplication>
RuntimeApplicationDispatcherImpl<TEmbedderApplication>::
RuntimeApplicationDispatcherImpl(ApplicationClient& application_client)
: application_client_(application_client) {}
template <typename TEmbedderApplication>
TEmbedderApplication*
RuntimeApplicationDispatcherImpl<TEmbedderApplication>::CreateApplication(
std::string session_id,
ApplicationConfig app_config,
EmbedderApplicationFactory factory) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
std::unique_ptr<RuntimeApplicationBase> app;
if (cast_streaming::IsStreamingReceiverAppId(app_config.app_id)) {
app = std::make_unique<StreamingRuntimeApplication>(
session_id, std::move(app_config), *application_client_);
} else {
app = std::make_unique<WebRuntimeApplication>(
session_id, std::move(app_config), *application_client_);
}
// TODO(b/232140331): Call this only when foreground app changes.
application_client_->OnForegroundApplicationChanged(app.get());
auto* app_ptr = app.get();
std::unique_ptr<TEmbedderApplication> embedder_app =
std::move(factory).Run(std::move(app));
app_ptr->SetEmbedderApplication(*embedder_app);
auto [iter, success] =
loaded_apps_.emplace(std::move(session_id), std::move(embedder_app));
DCHECK(success);
return iter->second.get();
}
template <typename TEmbedderApplication>
TEmbedderApplication*
RuntimeApplicationDispatcherImpl<TEmbedderApplication>::GetApplication(
const std::string& session_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto iter = loaded_apps_.find(session_id);
return iter == loaded_apps_.end() ? nullptr : iter->second.get();
}
template <typename TEmbedderApplication>
std::unique_ptr<TEmbedderApplication>
RuntimeApplicationDispatcherImpl<TEmbedderApplication>::DestroyApplication(
const std::string& session_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto iter = loaded_apps_.find(session_id);
if (iter == loaded_apps_.end()) {
return nullptr;
}
auto app = std::move(iter->second);
loaded_apps_.erase(iter);
// TODO(b/232140331): Call this only when foreground app changes.
application_client_->OnForegroundApplicationChanged(nullptr);
return app;
}
} // namespace cast_receiver
#endif // COMPONENTS_CAST_RECEIVER_BROWSER_RUNTIME_APPLICATION_DISPATCHER_IMPL_H_
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