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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_FEED_WEB_FEED_TAB_HELPER_H_
#define CHROME_BROWSER_FEED_WEB_FEED_TAB_HELPER_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/ui/tabs/tab_enums.h"
#include "components/feed/core/v2/public/types.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
namespace content {
class WebContents;
}
namespace feed {
// Per-tab class that monitors the navigations and stores the necessary info
// to facilitate the synchronous access to web feed information.
class WebFeedTabHelper : public content::WebContentsObserver,
public content::WebContentsUserData<WebFeedTabHelper> {
public:
class WebFeedInfoFinder {
public:
virtual ~WebFeedInfoFinder() = default;
virtual void FindForPage(
content::WebContents* web_contents,
base::OnceCallback<void(WebFeedMetadata)> callback) = 0;
};
WebFeedTabHelper(const WebFeedTabHelper&) = delete;
WebFeedTabHelper& operator=(const WebFeedTabHelper&) = delete;
~WebFeedTabHelper() override;
// Updates the web feed info stored in this per-tab class instance, as the
// result of successful following or unfollowing. The update will be skipped
// if the contents have navigated to a different URL (the passing URL does
// not match the URL stored in this object).
void UpdateWebFeedInfo(const GURL& url,
TabWebFeedFollowState follow_state,
const std::string& web_feed_id);
// For testing purpose.
void SetWebFeedInfoForTesting(const GURL& url,
TabWebFeedFollowState follow_state,
const std::string& web_feed_id);
void SetWebFeedInfoFinderForTesting(
std::unique_ptr<WebFeedInfoFinder> finder);
GURL url() const { return url_; }
TabWebFeedFollowState follow_state() const { return follow_state_; }
std::string web_feed_id() const { return web_feed_id_; }
private:
friend class content::WebContentsUserData<WebFeedTabHelper>;
explicit WebFeedTabHelper(content::WebContents* web_contents);
// Overridden from content::WebContentsObserver:
void PrimaryPageChanged(content::Page& page) override;
void OnWebFeedInfoRetrieved(const GURL& url, WebFeedMetadata metadata);
GURL url_;
TabWebFeedFollowState follow_state_ = TabWebFeedFollowState::kUnknown;
std::string web_feed_id_;
std::unique_ptr<WebFeedInfoFinder> web_feed_info_finder_;
base::WeakPtrFactory<WebFeedTabHelper> weak_ptr_factory_{this};
WEB_CONTENTS_USER_DATA_KEY_DECL();
};
} // namespace feed
#endif // CHROME_BROWSER_FEED_WEB_FEED_TAB_HELPER_H_
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