Move ReadingList model to components/reading_list/core

components/reading_list/ios/reading_list_model_impl.h

-// 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_READING_LIST_IOS_READING_LIST_MODEL_IMPL_H_
-#define COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_IMPL_H_
-
-#include <map>
-#include <memory>
-
-#include "components/keyed_service/core/keyed_service.h"
-#include "components/reading_list/ios/reading_list_entry.h"
-#include "components/reading_list/ios/reading_list_model.h"
-#include "components/reading_list/ios/reading_list_model_storage.h"
-#include "components/reading_list/ios/reading_list_store_delegate.h"
-
-namespace base {
-class Clock;
-}
-
-class PrefService;
-
-// Concrete implementation of a reading list model using in memory lists.
-class ReadingListModelImpl : public ReadingListModel,
-                             public ReadingListStoreDelegate,
-                             public KeyedService {
- public:
-  using ReadingListEntries = std::map<GURL, ReadingListEntry>;
-
-  // Initialize a ReadingListModelImpl to load and save data in
-  // |storage_layer|. Passing null to |storage_layer| will create a
-  // ReadingListModelImpl without persistence. Data will not be persistent
-  // across sessions.
-  // |clock| will be used to timestamp all the operations.
-  ReadingListModelImpl(std::unique_ptr<ReadingListModelStorage> storage_layer,
-                       PrefService* pref_service,
-                       std::unique_ptr<base::Clock> clock_);
-
-  ReadingListModelImpl();
-
-  syncer::ModelTypeSyncBridge* GetModelTypeSyncBridge() override;
-
-  ~ReadingListModelImpl() override;
-
-  void StoreLoaded(std::unique_ptr<ReadingListEntries> entries) override;
-
-  // KeyedService implementation.
-  void Shutdown() override;
-
-  // ReadingListModel implementation.
-  bool loaded() const override;
-
-  size_t size() const override;
-  size_t unread_size() const override;
-  size_t unseen_size() const override;
-
-  void MarkAllSeen() override;
-  bool GetLocalUnseenFlag() const override;
-  void ResetLocalUnseenFlag() override;
-
-  const std::vector<GURL> Keys() const override;
-
-  const ReadingListEntry* GetEntryByURL(const GURL& gurl) const override;
-  const ReadingListEntry* GetFirstUnreadEntry(bool distilled) const override;
-
-  void RemoveEntryByURL(const GURL& url) override;
-
-  const ReadingListEntry& AddEntry(const GURL& url,
-                                   const std::string& title,
-                                   reading_list::EntrySource source) override;
-
-  void SetReadStatus(const GURL& url, bool read) override;
-
-  void SetEntryTitle(const GURL& url, const std::string& title) override;
-  void SetEntryDistilledState(
-      const GURL& url,
-      ReadingListEntry::DistillationState state) override;
-  void SetEntryDistilledInfo(const GURL& url,
-                             const base::FilePath& distilled_path,
-                             const GURL& distilled_url,
-                             int64_t distillation_size,
-                             const base::Time& distillation_date) override;
-
-  void SyncAddEntry(std::unique_ptr<ReadingListEntry> entry) override;
-  ReadingListEntry* SyncMergeEntry(
-      std::unique_ptr<ReadingListEntry> entry) override;
-  void SyncRemoveEntry(const GURL& url) override;
-  bool DeleteAllEntries() override;
-
-  std::unique_ptr<ReadingListModel::ScopedReadingListBatchUpdate>
-  CreateBatchToken() override;
-
-  // Helper class that is used to scope batch updates.
-  class ScopedReadingListBatchUpdate
-      : public ReadingListModel::ScopedReadingListBatchUpdate {
-   public:
-    explicit ScopedReadingListBatchUpdate(ReadingListModelImpl* model);
-
-    ~ScopedReadingListBatchUpdate() override;
-
-   private:
-    std::unique_ptr<ReadingListModelStorage::ScopedBatchUpdate> storage_token_;
-
-    DISALLOW_COPY_AND_ASSIGN(ScopedReadingListBatchUpdate);
-  };
-
- protected:
-  void EnteringBatchUpdates() override;
-  void LeavingBatchUpdates() override;
-
- private:
-  // Sets/Loads the pref flag that indicate if some entries have never been seen
-  // since being added to the store.
-  void SetPersistentHasUnseen(bool has_unseen);
-  bool GetPersistentHasUnseen();
-
-  // Returns a mutable pointer to the entry with URL |url|. Return nullptr if
-  // no entry is found.
-  ReadingListEntry* GetMutableEntryFromURL(const GURL& url) const;
-
-  // Returns the |storage_layer_| of the model.
-  ReadingListModelStorage* StorageLayer();
-
-  // Remove entry |url| and propagate to store if |from_sync| is false.
-  void RemoveEntryByURLImpl(const GURL& url, bool from_sync);
-
-  void RebuildIndex() const;
-
-  std::unique_ptr<ReadingListEntries> entries_;
-  size_t unread_entry_count_;
-  size_t read_entry_count_;
-  size_t unseen_entry_count_;
-
-  // Update the 3 counts above considering addition/removal of |entry|.
-  void UpdateEntryStateCountersOnEntryRemoval(const ReadingListEntry& entry);
-  void UpdateEntryStateCountersOnEntryInsertion(const ReadingListEntry& entry);
-
-  // Set the unseen flag to true.
-  void SetUnseenFlag();
-
-  // |storage_layer_| depends on |clock_| so keep the order.
-  std::unique_ptr<base::Clock> clock_;
-  std::unique_ptr<ReadingListModelStorage> storage_layer_;
-  PrefService* pref_service_;
-  bool has_unseen_;
-  bool loaded_;
-
-  base::WeakPtrFactory<ReadingListModelImpl> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(ReadingListModelImpl);
-};
-
-#endif  // COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_IMPL_H_