extensions/browser/extension_scoped_prefs.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 EXTENSIONS_BROWSER_EXTENSION_SCOPED_PREFS_H_
#define EXTENSIONS_BROWSER_EXTENSION_SCOPED_PREFS_H_

#include <memory>
#include <string>

#include "base/strings/string_piece_forward.h"

namespace base {
class DictionaryValue;
class ListValue;
class Value;
}

namespace extensions {

class ExtensionScopedPrefs {
 public:
  ExtensionScopedPrefs() {}
  ~ExtensionScopedPrefs() {}

  // Sets the pref |key| for extension |id| to |value|.
  virtual void UpdateExtensionPref(const std::string& id,
                                   base::StringPiece key,
                                   std::unique_ptr<base::Value> value) = 0;

  // Deletes the pref dictionary for extension |id|.
  virtual void DeleteExtensionPrefs(const std::string& id) = 0;

  // Reads a boolean pref |pref_key| from extension with id |extension_id|.
  virtual bool ReadPrefAsBoolean(const std::string& extension_id,
                                 base::StringPiece pref_key,
                                 bool* out_value) const = 0;

  // Reads an integer pref |pref_key| from extension with id |extension_id|.
  virtual bool ReadPrefAsInteger(const std::string& extension_id,
                                 base::StringPiece pref_key,
                                 int* out_value) const = 0;

  // Reads a string pref |pref_key| from extension with id |extension_id|.
  virtual bool ReadPrefAsString(const std::string& extension_id,
                                base::StringPiece pref_key,
                                std::string* out_value) const = 0;

  // Reads a list pref |pref_key| from extension with id |extension_id|.
  virtual bool ReadPrefAsList(const std::string& extension_id,
                              base::StringPiece pref_key,
                              const base::ListValue** out_value) const = 0;

  // Reads a dictionary pref |pref_key| from extension with id |extension_id|.
  virtual bool ReadPrefAsDictionary(
      const std::string& extension_id,
      base::StringPiece pref_key,
      const base::DictionaryValue** out_value) const = 0;

  // Returns true if the prefs contain an entry for an extension with id
  // |extension_id|.
  virtual bool HasPrefForExtension(const std::string& extension_id) const = 0;
};

}  // namespace extensions

#endif  // EXTENSIONS_BROWSER_EXTENSION_SCOPED_PREFS_H_