[Offline pages] Extracting callbacks from the Offline Page Model

components/offline_pages/offline_page_types.h

Index: components/offline_pages/offline_page_types.h
diff --git a/components/offline_pages/offline_page_types.h b/components/offline_pages/offline_page_types.h
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+// Copyright 2016 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_TYPES_H_
+#define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_TYPES_H_
+
+#include <stdint.h>
+
+#include <set>
+#include <vector>
+
+#include "base/callback.h"
+#include "components/offline_pages/offline_page_item.h"
+
+class GURL;
+
+// This file contains common callbacks used by OfflinePageModel and is a
+// temporary step to refactor and interface of the model out of the
+// implementation.
+namespace offline_pages {
+// Result of saving a page offline.
+// A Java counterpart will be generated for this enum.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.components.offlinepages
+enum class SavePageResult {
+  SUCCESS,
+  CANCELLED,
+  DEVICE_FULL,
+  CONTENT_UNAVAILABLE,
+  ARCHIVE_CREATION_FAILED,
+  STORE_FAILURE,
+  ALREADY_EXISTS,
+  // Certain pages, i.e. file URL or NTP, will not be saved because these
+  // are already locally accessible.
+  SKIPPED,
+  SECURITY_CERTIFICATE_ERROR,
+  // NOTE: always keep this entry at the end. Add new result types only
+  // immediately above this line. Make sure to update the corresponding
+  // histogram enum accordingly.
+  RESULT_COUNT,
+};
+
+// Result of deleting an offline page.
+// A Java counterpart will be generated for this enum.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.components.offlinepages
+enum class DeletePageResult {
+  SUCCESS,
+  CANCELLED,
+  STORE_FAILURE,
+  DEVICE_FAILURE,
+  NOT_FOUND,
+  // NOTE: always keep this entry at the end. Add new result types only
+  // immediately above this line. Make sure to update the corresponding
+  // histogram enum accordingly.
+  RESULT_COUNT,
+};
+
+// Result of loading all pages.
+enum class LoadResult {
+  SUCCESS,
+  CANCELLED,
+  STORE_FAILURE,
+};
+
+typedef std::set<GURL> CheckPagesExistOfflineResult;
+typedef std::vector<int64_t> MultipleOfflineIdResult;
+typedef base::Optional<OfflinePageItem> SingleOfflinePageItemResult;
+typedef std::vector<OfflinePageItem> MultipleOfflinePageItemResult;
+
+typedef base::Callback<void(SavePageResult, int64_t)> SavePageCallback;
+typedef base::Callback<void(DeletePageResult)> DeletePageCallback;
+typedef base::Callback<void(const CheckPagesExistOfflineResult&)>
+    CheckPagesExistOfflineCallback;
+typedef base::Callback<void(bool)> HasPagesCallback;
+typedef base::Callback<void(const MultipleOfflineIdResult&)>
+    MultipleOfflineIdCallback;
+typedef base::Callback<void(const SingleOfflinePageItemResult&)>
+    SingleOfflinePageItemCallback;
+typedef base::Callback<void(const MultipleOfflinePageItemResult&)>
+    MultipleOfflinePageItemCallback;
+typedef base::Callback<bool(const GURL&)> UrlPredicate;
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_TYPES_H_