<?php
/*
 * template_lite plugin
 *
 * Type:     function
 * Name:     cycle
 * Version:  1.3
 * Date:     May 3, 2002
 * Author:   Monte Ohrt <monte@ispi.net>
 * Credits:  Mark Priatel <mpriatel@rogers.com>
 *           Gerard <gerard@interfold.com>
 *           Jason Sweat <jsweat_php@yahoo.com>
 * Purpose:  cycle through given values
 * Input:    name = name of cycle (optional)
 *           values = comma separated list of values to cycle,
 *                    or an array of values to cycle
 *                    (this can be left out for subsequent calls)
 *           reset = boolean - resets given var to true
 *           print = boolean - print var or not. default is true
 *           advance = boolean - whether or not to advance the cycle
 *           delimiter = the value delimiter, default is ","
 *           assign = boolean, assigns to template var instead of
 *                    printed.
 * Examples: {cycle values="#eeeeee,#d0d0d0d"}
 *           {cycle name=row values="one,two,three" reset=true}
 *           {cycle name=row}
 * Credit:   Taken from the original Smarty
 *           http://smarty.php.net
 */
function tpl_function_cycle($params, &$tpl)
{
	static $cycle_vars;

	$name    = (empty($params['name']))    ? 'default' : $params['name'];
	$print   = (isset($params['print']))   ? (bool)$params['print'] : true;
	$advance = (isset($params['advance'])) ? (bool)$params['advance'] : true;
	$reset   = (isset($params['reset']))   ? (bool)$params['reset'] : false;

	if (!in_array('values', array_keys($params)))
	{
		if(!isset($cycle_vars[$name]['values']))
		{
			throw new Template_Exception("cycle: missing 'values' parameter", $tpl);
			return;
		}
	}
	else
	{
		if(isset($cycle_vars[$name]['values']) && $cycle_vars[$name]['values'] != $params['values'] )
		{
			$cycle_vars[$name]['index'] = 0;
		}
		$cycle_vars[$name]['values'] = $params['values'];
	}

	$cycle_vars[$name]['delimiter'] = (isset($params['delimiter'])) ? $params['delimiter'] : ',';

	if(is_array($cycle_vars[$name]['values']))
	{
		$cycle_array = $cycle_vars[$name]['values'];
	}
	else
	{
		$cycle_array = explode($cycle_vars[$name]['delimiter'],$cycle_vars[$name]['values']);
	}

	if(!isset($cycle_vars[$name]['index']) || $reset )
	{
		$cycle_vars[$name]['index'] = 0;
	}

	if (isset($params['assign']))
	{
		$print = false;
		$tpl->assign($params['assign'], $cycle_array[$cycle_vars[$name]['index']]);
	}

	if($print)
	{
		$retval = $cycle_array[$cycle_vars[$name]['index']];
	}
	else
	{
		$retval = null;
	}

	if($advance)
	{
		if ( $cycle_vars[$name]['index'] >= count($cycle_array) -1 )
		{
			$cycle_vars[$name]['index'] = 0;
		}
		else
		{
			$cycle_vars[$name]['index']++;
		}
	}

	return $retval;
}
?>