parser_nodelog.php

<?php

/**
 * Copyright (c) 2012, Jos de Ruijter <jos@dutnie.nl>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/**
 * Parse instructions for the nodelog logfile format.
 *
 * +------------+-------------------------------------------------------+->
 * | Line	| Format						| Notes
 * +------------+-------------------------------------------------------+->
 * | Normal	| NICK: MSG						| Skip empty lines.
 * | Join	| NICK has joined the channel				|
 * | Part	| NICK has left the channel				|
 * +------------+-------------------------------------------------------+->
 *
 * Notes:
 * - normalize_line() scrubs all lines before passing them on to parse_line().
 * - Given that nicks can't contain ":" the order of the regular expressions below is irrelevant (current order aims for best performance).
 * - Booooring...
 */
final class parser_nodelog extends parser
{
	/**
	 * Parse a line for various chat data.
	 */
	protected function parse_line($line)
	{
		/**
		 * "Normal" lines.
		 */
		if (preg_match('/^\[(?<time>\d{2}:\d{2}(:\d{2})?)\] (?<nick>\S+): (?<line>.+)$/', $line, $matches)) {
			$this->set_normal($this->date.' '.$matches['time'], $matches['nick'], $matches['line']);

		/**
		 * "Join" lines.
		 */
		} elseif (preg_match('/^\[(?<time>\d{2}:\d{2}(:\d{2})?)\] (?<nick>\S+) has joined the channel$/', $line, $matches)) {
			$this->set_join($this->date.' '.$matches['time'], $matches['nick']);

		/**
		 * "Part" lines.
		 */
		} elseif (preg_match('/^\[(?<time>\d{2}:\d{2}(:\d{2})?)\] (?<nick>\S+) has left the channel$/', $line, $matches)) {
			$this->set_part($this->date.' '.$matches['time'], $matches['nick']);

		/**
		 * Skip everything else.
		 */
		} elseif ($line != '') {
			$this->output('debug', 'parse_line(): skipping line '.$this->linenum.': \''.$line.'\'');
		}
	}
}

?>