chromium/components/offline_pages/core/offline_page_archiver.h

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ARCHIVER_H_
#define COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ARCHIVER_H_

#include <cstdint>
#include <string>

#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "components/offline_pages/core/offline_page_item.h"
#include "components/offline_pages/core/offline_page_types.h"
#include "url/gurl.h"

namespace content {
class WebContents;
}  // namespace content

namespace offline_pages {

// Interface of a class responsible for creation of the archive for offline use.
//
// Archiver will be implemented by embedder and may have additional methods that
// are not interesting from the perspective of OfflinePageModel. Example of such
// extra information or capability is a way to enumerate available WebContents
// to find the one that needs to be used to create archive (or to map it to the
// URL passed in CreateArchive in some other way).
//
// Archiver will be responsible for naming the file that is being saved (it has
// URL, title and the whole page content at its disposal). For that it should be
// also configured with the path where the archives are stored.
//
// Archiver should be able to archive multiple pages in parallel, as these are
// asynchronous calls carried out by some other component.
//
// If archiver gets two consecutive requests to archive the same page (may be
// run in parallel) it can generate 2 different names for files and save the
// same page separately, as if these were 2 completely unrelated pages. It is up
// to the caller (e.g. OfflinePageModel) to make sure that situation like that
// does not happen.
//
// If the page is not completely loaded, it is up to the implementation of the
// archiver whether to respond with ERROR_CONTENT_UNAVAILABLE, wait longer to
// actually snapshot a complete page, or snapshot whatever is available at that
// point in time (what the user sees).
class OfflinePageArchiver { … };

}  // namespace offline_pages

#endif  // COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ARCHIVER_H_