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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_WEBUI_COMPONENTS_COMPONENTS_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_COMPONENTS_COMPONENTS_HANDLER_H_
#include <memory>
#include <string>
#include "base/memory/raw_ptr.h"
#include "base/scoped_observation.h"
#include "build/build_config.h"
#include "components/component_updater/component_updater_service.h"
#include "components/update_client/update_client.h"
#include "content/public/browser/web_ui_message_handler.h"
// The handler for Javascript messages for the chrome://components/ page.
class ComponentsHandler : public content::WebUIMessageHandler,
public component_updater::ServiceObserver {
public:
ComponentsHandler(
component_updater::ComponentUpdateService* component_updater);
ComponentsHandler(const ComponentsHandler&) = delete;
ComponentsHandler& operator=(const ComponentsHandler&) = delete;
~ComponentsHandler() override;
// WebUIMessageHandler implementation.
void RegisterMessages() override;
void OnJavascriptAllowed() override;
void OnJavascriptDisallowed() override;
// Callback for the "requestComponentsData" message.
void HandleRequestComponentsData(const base::Value::List& args);
// Callback for the "checkUpdate" message.
void HandleCheckUpdate(const base::Value::List& args);
// ServiceObserver implementation.
void OnEvent(const update_client::CrxUpdateItem& item) override;
private:
static std::u16string ServiceStatusToString(
update_client::ComponentState state);
base::Value::List LoadComponents();
void OnDemandUpdate(const std::string& component_id);
// Weak pointer; injected for testing.
const raw_ptr<component_updater::ComponentUpdateService> component_updater_;
base::ScopedObservation<component_updater::ComponentUpdateService,
component_updater::ComponentUpdateService::Observer>
observation_{this};
};
#endif // CHROME_BROWSER_UI_WEBUI_COMPONENTS_COMPONENTS_HANDLER_H_
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