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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_CONFLICTS_CONFLICTS_DATA_FETCHER_H_
#define CHROME_BROWSER_UI_WEBUI_CONFLICTS_CONFLICTS_DATA_FETCHER_H_
#include <memory>
#include <optional>
#include "base/functional/callback.h"
#include "base/sequence_checker.h"
#include "base/task/sequenced_task_runner.h"
#include "base/values.h"
#include "build/branding_buildflags.h"
#include "build/build_config.h"
#include "chrome/browser/win/conflicts/module_database_observer.h"
// This class is responsible for gathering the list of modules for the
// chrome://conflicts page and the state of the third-party features on the
// ModuleDatabase task runner and sending it back to the UI thread. The instance
// should be deleted once the OnConflictsDataFetchedCallback is invoked.
class ConflictsDataFetcher : public ModuleDatabaseObserver {
public:
using UniquePtr =
std::unique_ptr<ConflictsDataFetcher, base::OnTaskRunnerDeleter>;
using OnConflictsDataFetchedCallback =
base::OnceCallback<void(base::Value::Dict results)>;
ConflictsDataFetcher(const ConflictsDataFetcher&) = delete;
ConflictsDataFetcher& operator=(const ConflictsDataFetcher&) = delete;
~ConflictsDataFetcher() override;
// Creates the instance and initializes it on the ModuleDatabase task runner.
// |on_conflicts_data_fetched_callback| will be invoked on the caller's
// sequence.
static UniquePtr Create(
OnConflictsDataFetchedCallback on_conflicts_data_fetched_callback);
private:
explicit ConflictsDataFetcher(
OnConflictsDataFetchedCallback on_conflicts_data_fetched_callback);
void InitializeOnModuleDatabaseTaskRunner();
// Registers this instance to the ModuleDatabase to retrieve the list of
// modules via the ModuleDatabaseObserver API.
void GetListOfModules();
// ModuleDatabaseObserver:
void OnNewModuleFound(const ModuleInfoKey& module_key,
const ModuleInfoData& module_data) override;
void OnModuleDatabaseIdle() override;
OnConflictsDataFetchedCallback on_conflicts_data_fetched_callback_;
// Temporarily holds the module list while the modules are being
// enumerated.
std::optional<base::Value::List> module_list_;
SEQUENCE_CHECKER(sequence_checker_);
};
#endif // CHROME_BROWSER_UI_WEBUI_CONFLICTS_CONFLICTS_DATA_FETCHER_H_
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