<?php

/**
 * Formats a date
 * <pre>
 *  * value : the date, as a unix timestamp, mysql datetime or whatever strtotime() can parse
 *  * format : output format, see {@link http://php.net/strftime} for details
 *  * default : a default timestamp value, if the first one is empty
 * </pre>
 * This software is provided 'as-is', without any express or implied warranty.
 * In no event will the authors be held liable for any damages arising from the use of this software.
 *
 * @author     Jordi Boggiano <j.boggiano@seld.be>
 * @copyright  Copyright (c) 2008, Jordi Boggiano
 * @license    http://dwoo.org/LICENSE   Modified BSD License
 * @link       http://dwoo.org/
 * @version    1.0.1
 * @date       2008-12-24
 * @package    Dwoo
 */
function Dwoo_Plugin_date_format(Dwoo $dwoo, $value, $format='%b %e, %Y', $default=null)
{
	if (!empty($value)) {
		// convert if it's not a valid unix timestamp
		if (preg_match('#^-?\d{1,10}$#', $value)===0) {
			$value = strtotime($value);
		}
	} elseif (!empty($default)) {
		// convert if it's not a valid unix timestamp
		if (preg_match('#^-?\d{1,10}$#', $default)===0) {
			$value = strtotime($default);
		} else {
			$value = $default;
		}
	} else {
		return '';
	}

	// Credits for that windows compat block to Monte Ohrt who made smarty's date_format plugin
	if (DIRECTORY_SEPARATOR == '\\') {
		$_win_from = array('%D',       '%h', '%n', '%r',          '%R',    '%t', '%T');
		$_win_to   = array('%m/%d/%y', '%b', "\n", '%I:%M:%S %p', '%H:%M', "\t", '%H:%M:%S');
		if (strpos($format, '%e') !== false) {
			$_win_from[] = '%e';
			$_win_to[]   = sprintf('%\' 2d', date('j', $value));
		}
		if (strpos($format, '%l') !== false) {
			$_win_from[] = '%l';
			$_win_to[]   = sprintf('%\' 2d', date('h', $value));
		}
		$format = str_replace($_win_from, $_win_to, $format);
	}
	return strftime($format, $value);
}