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// Copyright 2024 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_MAHI_MAHI_CACHE_MANAGER_H_
#define CHROME_BROWSER_ASH_MAHI_MAHI_CACHE_MANAGER_H_
#include <map>
#include <string>
#include "base/timer/timer.h"
#include "ui/gfx/image/image_skia.h"
#include "url/gurl.h"
namespace ash {
// A helper class that help MahiManager to manage its cache.
class MahiCacheManager {
public:
struct MahiQA {
std::u16string question;
std::u16string answer;
};
// Struct that store data of a page.
struct MahiData {
MahiData();
MahiData(const std::string& url,
const std::u16string& title,
const std::u16string& page_content,
const std::optional<gfx::ImageSkia>& favicon_image,
const std::optional<std::u16string>& summary,
const std::vector<MahiQA>& previous_qa);
MahiData(const MahiData&);
MahiData& operator=(const MahiData&);
~MahiData();
// URL of the webpage
std::string url;
// The title of the page.
std::u16string title;
// The extracted content of the page.
std::u16string page_content;
// The favicon of the page.
std::optional<gfx::ImageSkia> favicon_image;
// The summary of the page;
std::optional<std::u16string> summary;
// List of previous questions and answers for this page.
std::vector<MahiQA> previous_qa;
// Time of creation of this object.
base::Time creation_time;
};
MahiCacheManager();
MahiCacheManager(const MahiCacheManager&) = delete;
MahiCacheManager& operator=(const MahiCacheManager&) = delete;
~MahiCacheManager();
// Adds page cache for a given url. If the url exists in the cache, replace
// with the new one.
void AddCacheForUrl(const std::string& url, const MahiData& data);
// Updates summary for a URL that is already in the cache. If the cache
// doesn't contain the URL, does nothing.
void TryToUpdateSummaryForUrl(const std::string& url,
const std::u16string& summary);
// Returns the content for the given url.
std::u16string GetPageContentForUrl(const std::string& url) const;
// Returns the summary for the given url. If it's not in the cache, return
// nullopt.
std::optional<std::u16string> GetSummaryForUrl(const std::string& url) const;
// Returns list of questions and answers for the given url.
std::vector<MahiQA> GetQAForUrl(const std::string& url) const;
// Clears the cache.
void ClearCache();
// Delete the page cache for a given url. Does nothing if the url doesn't
// exist in the cache.
void DeleteCacheForUrl(const std::string& url);
// Gets size of the cache.
int size() { return page_cache_.size(); }
private:
friend class MahiCacheManagerTest;
// Called when the |periodic_timer_| triggers.
void OnTimerFired();
// Timer to trigger periodically for clearing cache.
std::unique_ptr<base::RepeatingTimer> periodic_timer_;
// A map from a url to it's corresponding data. It's used to store the cache
// for mahi.
std::map<GURL, MahiData> page_cache_;
};
} // namespace ash
#endif // CHROME_BROWSER_ASH_MAHI_MAHI_CACHE_MANAGER_H_
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