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<?php
/**
* Utility functions for generating group URIs in HTML files
*
* Before including this file, /min/lib must be in your include_path.
*
* @package Minify
*/
require_once 'Minify/Build.php';
/**
* Get a timestamped URI to a minified resource using the default Minify install
*
* <code>
* <link rel="stylesheet" type="text/css" href="<?php echo Minify_groupUri('css'); ?>" />
* <script type="text/javascript" src="<?php echo Minify_groupUri('js'); ?>"></script>
* </code>
*
* If you do not want ampersands as HTML entities, set Minify_Build::$ampersand = "&"
* before using this function.
*
* @param string $group a key from groupsConfig.php
* @param boolean $forceAmpersand (default false) Set to true if the RewriteRule
* directives in .htaccess are functional. This will remove the "?" from URIs, making them
* more cacheable by proxies.
* @return string
*/
function Minify_groupUri($group, $forceAmpersand = false)
{
$path = $forceAmpersand
? "/g={$group}"
: "/?g={$group}";
return _Minify_getBuild($group)->uri(
'/' . basename(dirname(__FILE__)) . $path
,$forceAmpersand
);
}
/**
* Get the last modification time of the source js/css files used by Minify to
* build the page.
*
* If you're caching the output of Minify_groupUri(), you'll want to rebuild
* the cache if it's older than this timestamp.
*
* <code>
* // simplistic HTML cache system
* $file = '/path/to/cache/file';
* if (! file_exists($file) || filemtime($file) < Minify_groupsMtime(array('js', 'css'))) {
* // (re)build cache
* $page = buildPage(); // this calls Minify_groupUri() for js and css
* file_put_contents($file, $page);
* echo $page;
* exit();
* }
* readfile($file);
* </code>
*
* @param array $groups an array of keys from groupsConfig.php
* @return int Unix timestamp of the latest modification
*/
function Minify_groupsMtime($groups)
{
$max = 0;
foreach ((array)$groups as $group) {
$max = max($max, _Minify_getBuild($group)->lastModified);
}
return $max;
}
/**
* @param string $group a key from groupsConfig.php
* @return Minify_Build
* @private
*/
function _Minify_getBuild($group)
{
static $builds = array();
static $gc = false;
if (false === $gc) {
$gc = (require dirname(__FILE__) . '/groupsConfig.php');
}
if (! isset($builds[$group])) {
$builds[$group] = new Minify_Build($gc[$group]);
}
return $builds[$group];
}
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