gistfile1.php

<?php

/**
 * Blizzard to Wowhead converter
 *
 * Converts Blizzard's talent string and class id into Wowhead's (shorter) talent string
 *
 * @author Gizzmo <justgiz@gmail.com>
 *
 * @param   string|int  $class   Blizzard's class id or class name
 * @param   string      $build   Blizzard's build string
 * @param   boolean     $to_url  return a Wowhead talent URL
 * @return  string               Wowhead's talent string
 * @return  string               Wowhead's talent url
 */
function b2w($class, $build, $to_url = false)
{
	// For language support
	$warrior =		'warrior';
	$paladin =		'paladin';
	$hunter =		'hunter';
	$rogue =		'rogue';
	$priest =		'priest';
	$death_knight =	'death knight';
	$shaman =		'shaman';
	$mage =			'mage';
	$warlock =		'warlock';
	$druid =		'druid';

	// Blizzard and wowhead have different order for the classes witch result in different ids
	$blizzard_classes = array(null,$warrior,$paladin,$hunter,$rogue,$priest,$death_knight,$shaman,$mage,$warlock,null,$druid);
	$wowhead_classes = array($druid,$hunter,$mage,$paladin,$priest,$rogue,$shaman,$warlock,$warrior,$death_knight);

	// Tree count order by wowhead order
	$tree_counts = array(
		array(20, 22, 21),	// druid
		array(19, 19, 20),	// hunter
		array(21, 21, 19),	// mage
		array(20, 20, 20),	// paladin
		array(21, 20, 21),	// priest
		array(19, 19, 19),	// rogue
		array(19, 19, 19),	// shaman
		array(18, 19, 19),	// warlock
		array(20, 21, 20),	// warrior
		array(20, 20, 19)	// death knight
	);

	// The string of which wowhead uses to encode their string
	$encrypt_string = '0zMcmVokRsaqbdrfwihuGINALpTjnyxtgevElBCDFHJKOPQSUWXYZ123456789Z';

	// Clean up the class
	$class = trim($class);

	// We are assuming the id number privided is the blizzard class id
	if (is_numeric($class))
		$class = $blizzard_classes[$class];

	// Now just convert the name to class id
	foreach ($wowhead_classes as $i => $wowhead_class)
	{
		if (strtolower($class) == strtolower($wowhead_class))
		{
			$class_id = $i;
			break;
		}
	}

	// Check to make sure the class id is set
	if (!isset($class_id))
		trigger_error('The provided class is invalid.', E_USER_ERROR);

	// Check to make sure the build string is the correct length
	if (strlen($build) != array_sum($tree_counts[$class_id]))
		trigger_error('The provided build string is not the correct length for the provided class.', E_USER_ERROR);

	// Now break the build string down into the different trees
	$build_trees = array(
		substr($build,0,$tree_counts[$class_id][0]),
		substr($build,$tree_counts[$class_id][0],$tree_counts[$class_id][1]),
		substr($build,$tree_counts[$class_id][0]+$tree_counts[$class_id][1],$tree_counts[$class_id][2])
	);

	// Start the string with the class
	$string = $encrypt_string[$class_id*3];

	// Loop though each tree to encode it
	foreach ($build_trees as $cur_tree)
	{
		$etree = '';
		$b = rtrim($cur_tree, '0');
		for ($i=0; $i<strlen($b); $i++)
		{
			$tens = intval($b[$i]);
			$ones = (++$i == strlen($b))? 0: intval($b[$i]);
			$etree .= $encrypt_string[$tens*6 + $ones];
		}

		$string .= (strlen($b)==strlen($cur_tree))? $etree: $etree.$encrypt_string[62];
	}

	// Remove any extra Z's
	$string = rtrim($string, $encrypt_string[62]);

	// Return the wowhead talent url?
	if ($to_url)
		$string = 'http://www.wowhead.com/talent#'.$string;

	return $string;
}