/*
 * Copyright (C) 2007 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef DatabaseAuthorizer_h
#define DatabaseAuthorizer_h

#include "platform/heap/Handle.h"
#include "wtf/Forward.h"
#include "wtf/text/WTFString.h"

namespace blink {

extern const int SQLAuthAllow;
extern const int SQLAuthDeny;

class DatabaseAuthorizer
    : public GarbageCollectedFinalized<DatabaseAuthorizer> {
 public:
  enum Permissions {
    ReadWriteMask = 0,
    ReadOnlyMask = 1 << 1,
    NoAccessMask = 1 << 2
  };

  static DatabaseAuthorizer* create(const String& databaseInfoTableName);
  DEFINE_INLINE_TRACE() {}

  int createTable(const String& tableName);
  int createTempTable(const String& tableName);
  int dropTable(const String& tableName);
  int dropTempTable(const String& tableName);
  int allowAlterTable(const String& databaseName, const String& tableName);

  int createIndex(const String& indexName, const String& tableName);
  int createTempIndex(const String& indexName, const String& tableName);
  int dropIndex(const String& indexName, const String& tableName);
  int dropTempIndex(const String& indexName, const String& tableName);

  int createTrigger(const String& triggerName, const String& tableName);
  int createTempTrigger(const String& triggerName, const String& tableName);
  int dropTrigger(const String& triggerName, const String& tableName);
  int dropTempTrigger(const String& triggerName, const String& tableName);

  int createView(const String& viewName);
  int createTempView(const String& viewName);
  int dropView(const String& viewName);
  int dropTempView(const String& viewName);

  int createVTable(const String& tableName, const String& moduleName);
  int dropVTable(const String& tableName, const String& moduleName);

  int allowDelete(const String& tableName);
  int allowInsert(const String& tableName);
  int allowUpdate(const String& tableName, const String& columnName);
  int allowTransaction();

  int allowSelect() { return SQLAuthAllow; }
  int allowRead(const String& tableName, const String& columnName);

  int allowReindex(const String& indexName);
  int allowAnalyze(const String& tableName);
  int allowFunction(const String& functionName);
  int allowPragma(const String& pragmaName, const String& firstArgument);

  int allowAttach(const String& filename);
  int allowDetach(const String& databaseName);

  void disable();
  void enable();
  void setPermissions(int permissions);

  void reset();
  void resetDeletes();

  bool lastActionWasInsert() const { return m_lastActionWasInsert; }
  bool lastActionChangedDatabase() const { return m_lastActionChangedDatabase; }
  bool hadDeletes() const { return m_hadDeletes; }

 private:
  explicit DatabaseAuthorizer(const String& databaseInfoTableName);
  void addWhitelistedFunctions();
  int denyBasedOnTableName(const String&) const;
  int updateDeletesBasedOnTableName(const String&);
  bool allowWrite();

  int m_permissions;
  bool m_securityEnabled : 1;
  bool m_lastActionWasInsert : 1;
  bool m_lastActionChangedDatabase : 1;
  bool m_hadDeletes : 1;

  const String m_databaseInfoTableName;
};

}  // namespace blink

#endif  // DatabaseAuthorizer_h
