components/sync/driver/data_type_status_table.h

// Copyright 2014 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_SYNC_DRIVER_DATA_TYPE_STATUS_TABLE_H_
#define COMPONENTS_SYNC_DRIVER_DATA_TYPE_STATUS_TABLE_H_

#include <map>
#include <string>

#include "components/sync/base/model_type.h"
#include "components/sync/model/sync_error.h"

namespace syncer {

// Class to keep track of data types that have encountered an error during sync.
class DataTypeStatusTable {
 public:
  using TypeErrorMap = std::map<ModelType, SyncError>;

  DataTypeStatusTable();
  DataTypeStatusTable(const DataTypeStatusTable& other);
  ~DataTypeStatusTable();

  // Copy and assign welcome.

  // Update the failed datatypes. Types will be added to their corresponding
  // error map based on their |error_type()|.
  void UpdateFailedDataTypes(const TypeErrorMap& errors);

  // Update an individual failed datatype. The type will be added to its
  // corresponding error map based on |error.error_type()|. Returns true if
  // there was an actual change.
  bool UpdateFailedDataType(ModelType type, const SyncError& error);

  // Resets the current set of data type errors.
  void Reset();

  // Resets the set of types with cryptographer errors.
  void ResetCryptoErrors();

  // Removes |type| from the data_type_errors_ set. Returns true if the type
  // was removed from the error set, false if the type did not have a data type
  // error to begin with.
  bool ResetDataTypePolicyErrorFor(ModelType type);

  // Removes |type| from the unread_errors_ set. Returns true if the type
  // was removed from the error set, false if the type did not have an unready
  // error to begin with.
  bool ResetUnreadyErrorFor(ModelType type);

  // Returns a list of all the errors this class has recorded.
  TypeErrorMap GetAllErrors() const;

  // Returns all types with failure errors. This includes, fatal, crypto, and
  // unready types.
  ModelTypeSet GetFailedTypes() const;

  // Returns the types that are failing due to datatype errors.
  ModelTypeSet GetFatalErrorTypes() const;

  // Returns the types that are failing due to cryptographer errors.
  ModelTypeSet GetCryptoErrorTypes() const;

  // Returns the types that cannot be configured due to not being ready.
  ModelTypeSet GetUnreadyErrorTypes() const;

 private:
  // List of data types that failed due to runtime errors and should be
  // disabled. ResetDataTypeError can remove them from this list.
  TypeErrorMap data_type_errors_;
  TypeErrorMap data_type_policy_errors_;

  // List of data types that failed due to the cryptographer not being ready.
  TypeErrorMap crypto_errors_;

  // List of data types that could not start due to not being ready. These can
  // be marked as ready by calling ResetUnreadyErrorFor(..).
  TypeErrorMap unready_errors_;
};

}  // namespace syncer

#endif  // COMPONENTS_SYNC_DRIVER_DATA_TYPE_STATUS_TABLE_H_