<?php
/*
 *  $Id: Stream.php 3155 2007-11-14 13:13:23Z jwage $
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR 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.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information, see
 * <http://www.phpdoctrine.org>.
 */

/**
 * @package     Doctrine
 * @subpackage  Log
 * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>
 * @author      Jonathan H. Wage <jwage@mac.com>
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.phpdoctrine.com
 * @since       1.0
 * @version     $Revision: 3155 $
 */
class Doctrine_Log_Writer_Stream extends Doctrine_Log_Writer_Abstract
{
    /**
     * Holds the PHP stream to log to.
     * @var null|stream
     */
    protected $_stream = null;

    /**
     * Class Constructor
     *
     * @param  streamOrUrl     Stream or URL to open as a stream
     * @param  mode            Mode, only applicable if a URL is given
     */
    public function __construct($streamOrUrl, $mode = 'a')
    {
        if (is_resource($streamOrUrl)) {
            if (get_resource_type($streamOrUrl) != 'stream') {
                throw new Doctrine_Log_Exception('Resource is not a stream');
            }

            if ($mode != 'a') {
                throw new Doctrine_Log_Exception('Mode cannot be changed on existing streams');
            }

            $this->_stream = $streamOrUrl;
        } else {
            if (! $this->_stream = @fopen($streamOrUrl, $mode, false)) {
                $msg = "\"$streamOrUrl\" cannot be opened with mode \"$mode\"";
                throw new Doctrine_Log_Exception($msg);
            }
        }

        $this->_formatter = new Doctrine_Log_Formatter_Simple();
    }

    /**
     * Close the stream resource.
     *
     * @return void
     */
    public function shutdown()
    {
        if (is_resource($this->_stream)) {
            fclose($this->_stream);
        }
    }

    /**
     * Write a message to the log.
     *
     * @param  array  $event  event data
     * @return void
     */
    protected function _write($event)
    {
        $line = $this->_formatter->format($event);

        if (false === @fwrite($this->_stream, $line)) {
            throw new Doctrine_Log_Exception("Unable to write to stream");
        }
    }
}