Move all components/offline_pages/ files into component/offline_pages/core

components/offline_pages/offline_page_archiver.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ARCHIVER_H_
-#define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ARCHIVER_H_
-
-#include <stdint.h>
-
-#include "base/callback.h"
-#include "base/files/file_path.h"
-#include "base/strings/string16.h"
-#include "url/gurl.h"
-
-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_UNAVAILBLE, wait longer to
-// actually snapshot a complete page, or snapshot whatever is available at that
-// point in time (what the user sees).
-//
-// TODO(fgorski): Add ability to delete archive.
-// TODO(fgorski): Add ability to check that archive exists.
-// TODO(fgorski): Add ability to refresh an existing archive in one step.
-// TODO(fgorski): Add ability to identify all of the archives in the directory,
-// to enable to model to reconcile the archives.
-class OfflinePageArchiver {
- public:
-  // Results of the archive creation.
-  enum class ArchiverResult {
-    SUCCESSFULLY_CREATED,           // Archive created successfully.
-    ERROR_DEVICE_FULL,              // Cannot save the archive - device is full.
-    ERROR_CANCELED,                 // Caller canceled the request.
-    ERROR_CONTENT_UNAVAILABLE,      // Content to archive is not available.
-    ERROR_ARCHIVE_CREATION_FAILED,  // Creation of archive failed.
-    ERROR_SECURITY_CERTIFICATE,     // Page was loaded on secure connection, but
-                                    // there was a security error.
-  };
-
-  typedef base::Callback<void(OfflinePageArchiver* /* archiver */,
-                              ArchiverResult /* result */,
-                              const GURL& /* url */,
-                              const base::FilePath& /* file_path */,
-                              const base::string16& /* title */,
-                              int64_t /* file_size */)>
-      CreateArchiveCallback;
-
-  virtual ~OfflinePageArchiver() {}
-
-  // Starts creating the archive in the |archives_dir| with |archive_id| added
-  // to the archive filename. Once archive is created |callback| will be called
-  // with the result and additional information.
-  virtual void CreateArchive(const base::FilePath& archives_dir,
-                             int64_t archive_id,
-                             const CreateArchiveCallback& callback) = 0;
-};
-
-}  // namespace offline_pages
-
-#endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ARCHIVER_H_