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// Copyright 2022 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_ASH_FILE_SUGGEST_FILE_SUGGESTION_PROVIDER_H_
#define CHROME_BROWSER_ASH_FILE_SUGGEST_FILE_SUGGESTION_PROVIDER_H_
#include "base/functional/callback.h"
#include "base/types/pass_key.h"
#include "chrome/browser/ash/file_suggest/file_suggest_util.h"
namespace ash {
class FileSuggestKeyedService;
// The base class of file suggestion providers (such as drive file suggestion
// provider). A subclass should ensure that `NotifySuggestionUpdate()` is
// called when the suggestions managed by the provider update.
class FileSuggestionProvider {
public:
explicit FileSuggestionProvider(
base::RepeatingCallback<void(FileSuggestionType)> notify_update_callback);
FileSuggestionProvider(const FileSuggestionProvider&) = delete;
FileSuggestionProvider& operator=(const FileSuggestionProvider&) = delete;
virtual ~FileSuggestionProvider();
// Queries for the suggested files managed by this provider and returns the
// suggested file data, including file paths and suggestion reasons, through
// the callback. The returned suggestions have been filtered by the file
// last modification time. Only the files that have been modified more
// recently than a threshold are returned.
// NOTE: the overridden function should ensure that `callback` runs finally.
virtual void GetSuggestFileData(GetSuggestFileDataCallback callback) = 0;
// Requests to update the data in `item_suggest_cache_`. Only used by the file
// suggest keyed service.
// This can be removed when kContinueSectionWithRecents feature gets enabled.
// TODO(https://crbug.com/1356347): Now the app list relies on this service to
// fetch the drive suggestion data. Meanwhile, this service relies on the app
// list to trigger the item cache update. This cyclic dependency could be
// confusing. The service should update the data cache by its own without
// depending on the app list code.
virtual void MaybeUpdateItemSuggestCache(
base::PassKey<FileSuggestKeyedService>) = 0;
protected:
// Sends the notification that the suggestions of `type` update.
void NotifySuggestionUpdate(FileSuggestionType type);
private:
base::RepeatingCallback<void(FileSuggestionType)> notify_update_callback_;
};
} // namespace ash
#endif // CHROME_BROWSER_ASH_FILE_SUGGEST_FILE_SUGGESTION_PROVIDER_H_
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