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<?php
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require_once 'Zend/Log/Writer/Abstract.php';
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require_once 'Zend/Log/Formatter/Simple.php';
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/**
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* @package Log
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* @author Diego Tremper <diegotremper@gmail.com>
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*/
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class Log_Writer_Rolling_File extends Zend_Log_Writer_Abstract {
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/**
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* Holds the PHP stream to log to.
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* @var null|stream
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*/
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protected $_stream = null;
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/**
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* default 1MB
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*/
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protected $fileMaxSize = 1048576;
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protected $maxFiles = 10;
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protected $_filename = null;
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/**
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* Class Constructor
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*
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* @param streamOrUrl Stream or URL to open as a stream
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* @param mode Mode, only applicable if a URL is given
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*/
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public function __construct($streamOrUrl, $mode = 'a') {
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if (is_resource ( $streamOrUrl )) {
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$stream_data = stream_get_meta_data ( $streamOrUrl );
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if (get_resource_type ( $streamOrUrl ) != 'plainfile') {
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require_once 'Zend/Log/Exception.php';
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throw new Zend_Log_Exception ( 'Resource is not a plainfile' );
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}
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if ($mode != 'a') {
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require_once 'Zend/Log/Exception.php';
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throw new Zend_Log_Exception ( 'Mode cannot be changed on existing streams' );
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}
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$filename = $stream_data ['uri'];
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$this->_stream = $streamOrUrl;
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} else {
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if (! $this->_stream = @fopen ( $streamOrUrl, $mode, false )) {
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$msg = "\"$streamOrUrl\" cannot be opened with mode \"$mode\"";
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require_once 'Zend/Log/Exception.php';
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throw new Zend_Log_Exception ( $msg );
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}
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$filename = $streamOrUrl;
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}
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$this->_fileName = $filename;
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fseek ( $this->_stream, filesize ( $this->_fileName ) - 1 );
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$this->_formatter = new Zend_Log_Formatter_Simple ( );
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}
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/**
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* @return int
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*/
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public function getFileMaxSize() {
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return $this->fileMaxSize;
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}
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/**
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* Set the maximum size that the output file is allowed to reach
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* before being rolled over to backup files.
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*
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* The maxFileSize option takes an long integer in the range 0 - 2^63.
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* You can specify the value with the suffixes "KB", "MB" or "GB"
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* so that the integer is interpreted being expressed respectively
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* in kilobytes, megabytes or gigabytes. For example, the value "10KB"
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* will be interpreted as 10240.
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*
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* @param int|string $fileMaxSize
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*/
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public function setFileMaxSize($fileMaxSize) {
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if (is_string($fileMaxSize)) {
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$this->fileMaxSize = $this->_convertMaxFileSize($fileMaxSize);
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} else {
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$this->fileMaxSize = $fileMaxSize;
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}
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}
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/**
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* @return int
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*/
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public function getMaxFiles() {
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return $this->maxFiles;
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}
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/**
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* @param int $maxFiles
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*/
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public function setMaxFiles($maxFiles) {
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$this->maxFiles = $maxFiles;
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}
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/**
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* Close the stream resource.
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*
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* @return void
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*/
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public function shutdown() {
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if (is_resource ( $this->_stream )) {
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fclose ( $this->_stream );
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}
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}
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/**
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* Write a message to the log.
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*
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* @param array $event event data
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* @return void
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*/
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protected function _write($event) {
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$line = $this->_formatter->format ( $event );
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if (false === @fwrite ( $this->_stream, $line )) {
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require_once 'Zend/Log/Exception.php';
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throw new Zend_Log_Exception ( "Unable to write to stream" );
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}
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if (ftell ( $this->_stream )> $this->fileMaxSize)
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$this->_rollOver ();
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}
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protected function _rollOver() {
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if ($this->maxFiles> 0) {
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$file = $this->_fileName . '.' . $this->maxFiles;
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if (is_writable ( $file ))
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unlink ( $file );
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for($i = $this->maxFiles - 1; $i>= 1; $i --) {
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$file = $this->_fileName . '.' . $i;
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if (is_readable ( $file )) {
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$target = $this->_fileName . '.' . ($i + 1);
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rename ( $file, $target );
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}
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}
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$target = $this->_fileName . '.1';
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$this->shutdown ();
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rename ( $this->_fileName, $target );
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}
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$this->__construct ( $this->_fileName, 'w' );
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}
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/**
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* Convert maxFileSize value
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*
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* @param mixed $value
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*/
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private function _convertMaxFileSize($value) {
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$maxFileSize = null;
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$numpart = substr ( $value, 0, strlen ( $value ) - 2 );
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$suffix = strtoupper ( substr ( $value, - 2 ) );
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switch ($suffix) {
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case 'KB' :
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$maxFileSize = ( int ) (( int ) $numpart * 1024);
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break;
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case 'MB' :
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$maxFileSize = ( int ) (( int ) $numpart * 1024 * 1024);
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break;
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case 'GB' :
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$maxFileSize = ( int ) (( int ) $numpart * 1024 * 1024 * 1024);
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break;
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default :
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require_once 'Zend/Log/Exception.php';
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throw new Zend_Log_Exception ( 'Invalid size' );
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}
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return $maxFileSize;
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}
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}
