/*
 * Copyright (C) 2007, 2013 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
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 */

#include "modules/webdatabase/SQLStatement.h"

#include "core/inspector/InspectorInstrumentation.h"
#include "modules/webdatabase/Database.h"
#include "modules/webdatabase/DatabaseManager.h"
#include "modules/webdatabase/SQLError.h"
#include "modules/webdatabase/SQLStatementBackend.h"
#include "modules/webdatabase/SQLStatementCallback.h"
#include "modules/webdatabase/SQLStatementErrorCallback.h"
#include "modules/webdatabase/SQLTransaction.h"
#include "modules/webdatabase/sqlite/SQLiteDatabase.h"
#include "modules/webdatabase/sqlite/SQLiteStatement.h"
#include "wtf/text/CString.h"

namespace blink {

SQLStatement* SQLStatement::create(Database* database,
                                   SQLStatementCallback* callback,
                                   SQLStatementErrorCallback* errorCallback) {
  return new SQLStatement(database, callback, errorCallback);
}

SQLStatement::SQLStatement(Database* database,
                           SQLStatementCallback* callback,
                           SQLStatementErrorCallback* errorCallback)
    : m_statementCallback(callback), m_statementErrorCallback(errorCallback) {
  DCHECK(isMainThread());

  if (hasCallback() || hasErrorCallback())
    InspectorInstrumentation::asyncTaskScheduled(
        database->getExecutionContext(), "SQLStatement", this);
}

DEFINE_TRACE(SQLStatement) {
  visitor->trace(m_backend);
  visitor->trace(m_statementCallback);
  visitor->trace(m_statementErrorCallback);
}

void SQLStatement::setBackend(SQLStatementBackend* backend) {
  m_backend = backend;
}

bool SQLStatement::hasCallback() {
  return m_statementCallback;
}

bool SQLStatement::hasErrorCallback() {
  return m_statementErrorCallback;
}

bool SQLStatement::performCallback(SQLTransaction* transaction) {
  ASSERT(transaction);
  ASSERT(m_backend);

  bool callbackError = false;

  SQLStatementCallback* callback = m_statementCallback.release();
  SQLStatementErrorCallback* errorCallback = m_statementErrorCallback.release();
  SQLErrorData* error = m_backend->sqlError();

  InspectorInstrumentation::AsyncTask asyncTask(
      transaction->database()->getExecutionContext(), this);

  // Call the appropriate statement callback and track if it resulted in an
  // error, because then we need to jump to the transaction error callback.
  if (error) {
    if (errorCallback)
      callbackError =
          errorCallback->handleEvent(transaction, SQLError::create(*error));
  } else if (callback) {
    callbackError =
        !callback->handleEvent(transaction, m_backend->sqlResultSet());
  }

  return callbackError;
}

}  // namespace blink