| alpha--util

# Source for file LogFile.inc Documentation is available at LogFile.inc <?php /** * * Generic log file class to encapsulate common file I/O and rendering calls * * @package alpha::util * @since 1.0 * @author John Collins <dev@alphaframework.org> * @version $Id: LogFile.inc 1341 2011-03-17 15:02:02Z johnc $ * @license http://www.opensource.org/licenses/bsd-license.php The BSD License * @copyright Copyright (c) 2011, John Collins (founder of Alpha Framework). * All rights reserved. * * <pre> * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the * following conditions are met: * * * Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * 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. * * Neither the name of the Alpha Framework 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 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 HOLDER 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. * </pre> * */ class LogFile { /** * The log file path * * @var string * @since 1.0 */ private $path; /** * An array of column headers use when rendering the log file * * @var array * @since 1.0 */ private $columnHeadings; /** * The value seperator to use in the file (default is a pipe) * * @var string * @since 1.0 */ private $seperator = '|'; /** * The maximum size of the log file in megabytes before a backup is created and a * new file is created, default is 5 * * @var integer * @since 1.0 */ private $MaxSize = 5; /** * The constructor * * @param string $path * @since 1.0 */ public function __construct($path) { $this->path = $path; } /** * Set the max log size in megabytes * * @param integer $MaxSize * @since 1.0 */ public function setMaxSize($MaxSize) { $this->MaxSize = $MaxSize; } /** * Set the value seperator * * @param string $seperator * @since 1.0 */ public function setSeperator($seperator) { $this->seperator = $seperator; } /** * Writes a line of data to the log file * * $param array $line * @since 1.0 */ public function writeLine($line) { global $config; $mergedLine = ''; $colCount = count($line); for($i = 0; $i < $colCount; $i++) { /* * we need to ensure that the seperator is not in the value anywhere, as it * would cause problems later when reading the log */ $value = str_replace($this->seperator, '', $line[$i]); if ($i == ($colCount-1)) $mergedLine .= $value.$this->seperator."\n"; else $mergedLine .= $value.$this->seperator; } try{ file_put_contents($this->path, $mergedLine, FILE_APPEND|LOCK_EX); if($this->checkFileSize() >= $this->MaxSize) { $this->backupFile(); } }catch(Exception $e) { try { $logsDir = $config->get('sysRoot').'logs'; if(!file_exists($logsDir)) mkdir($logsDir, 0766); file_put_contents($this->path, $mergedLine, FILE_APPEND|LOCK_EX); if($this->checkFileSize() >= $this->MaxSize) { $this->backupFile(); } }catch(Exception $e) { echo '<p class="error"><br>Unable to write to the log file ['.$this->path.'], error ['.$e->getMessage().']</p>'; exit; } } } /** * Returns the size in megabytes of the log file on disc * * @return float * @since 1.0 */ private function checkFileSize() { $size = filesize($this->path); return ($size/1024)/1024; } /** * Creates a backup of the log file, which has the same file name and location as the * current file plus a timestamp appended * * @since 1.0 */ private function backupFile() { // generate the name of the backup file name to contain a timestampe $backName = str_replace('.log', '-backup-'.date("y-m-d H.i.s").'.log', $this->path); // renames the logfile as the value of $backName rename($this->path, $backName); //creates a new log file, and sets it's permission for writting! $fp = fopen($this->path, 'a+'); // remember set directory permissons to allow creation! fclose($fp); //sets the new permission to rw+:rw+:rw+ chmod($this->path, 0666); } /** * Renders a log file as a HTML table * * $param array $cols The headings to use when rendering the log file * @since 1.0 */ public function renderLog($cols) { // render the start of the table echo '<table class="log_file">'; echo '<tr>'; foreach($cols as $heading) echo '<th>'.$heading.'</th>'; echo '</tr>'; // now read the file and render the data $LogFile = file_get_contents($this->path); $fields = explode($this->seperator, $LogFile); $totalLines = (count($fields)-1)/count($cols); for($line = 0; $line < $totalLines; $line++) { $count = count($cols); for($col = 0; $col < $count; $col++) { $index = ($line*count($cols))+$col; // if it is an error log, render the error types field in different colours if($col == 1 && $cols[1] == 'Level'){ switch($fields[$index]) { case 'DEBUG': echo '<td class="validation"><pre>'.htmlentities($fields[$index]).'</pre></td>'; break; case 'INFO': echo '<td class="validation"><pre>'.htmlentities($fields[$index]).'</pre></td>'; break; case 'WARN': echo '<td class="warning"><pre>'.htmlentities($fields[$index]).'</pre></td>'; break; case 'ERROR': echo '<td class="framework"><pre>'.htmlentities($fields[$index]).'</pre></td>'; break; case 'FATAL': echo '<td class="other"><pre>'.htmlentities($fields[$index]).'</pre></td>'; break; default: echo '<td><pre>'.htmlentities($fields[$index]).'</pre></td>'; break; } }else{ echo '<td><pre>'.htmlentities($fields[$index]).'</pre></td>'; } } echo '</tr>'; } echo '</table>'; } } ?> Documentation generated on Thu, 17 Mar 2011 16:44:32 +0000 by phpDocumentor 1.4.3