public function toString($indent = null)
{
// Return early if no minifier has been set up
if (false === $this->_minifier || !$this->_minifier->doBundle()) {
return parent::toString($indent);
}
ZFE_Util_Stopwatch::trigger(__METHOD__);
$container = $this->getContainer();
$container->ksort();
$items = $container->getArrayCopy();
// Collect CSS files
$compressable = array();
foreach ($items as $key => $item) {
if ($item->rel == 'stylesheet' && $item->type == 'text/css' && !$item->conditionalStylesheet) {
$file = basename($item->href);
if (in_array($file, $this->doNotBundle)) {
continue;
}
if (ZFE_Util_String::startsWith($item->href, "http://")) {
continue;
}
if (ZFE_Util_String::startsWith($item->href, "//")) {
continue;
}
if (!isset($compressable[$item->media])) {
$compressable[$item->media] = array();
}
$compressable[$item->media][] = $item;
unset($items[$key]);
}
}
$container->exchangeArray($items);
// Collect current data of the CSS files
$hashes = array();
$mtimes = array();
foreach ($compressable as $media => $items) {
$hash = '';
$_mtimes = array();
foreach ($items as $item) {
$file = $_SERVER['DOCUMENT_ROOT'] . $item->href;
if (Zend_Loader::isReadable($file)) {
$hash .= ':' . $item->href;
$_mtimes[] = filemtime($file);
}
}
$hashes[$media] = $hash;
$mtimes[$media] = $_mtimes;
}
// Check if the original CSS files have been updated since the
// last minification
foreach ($hashes as $media => $hash) {
$regenerate = true;
$filename = sha1($media . $hash) . ".css";
$cachedir = $this->_minifier->getCacheDir();
$path = $_SERVER['DOCUMENT_ROOT'] . $cachedir;
// check directory exists. if not, create it
if (!file_exists($path)) {
mkdir($path, 0775, true);
}
if (file_exists($path . "/" . $filename)) {
$mtime = filemtime($path . "/" . $filename);
$regenerate = array_reduce($mtimes[$media], function ($u, $v) use($mtime) {
return $u || $v > $mtime;
}, false);
}
// If any CSS file in this media group has been updated since the last
// minification, collect the content again, and store it in the cached version
if ($regenerate) {
$cssContent = '';
foreach ($compressable[$media] as $item) {
$file = $_SERVER['DOCUMENT_ROOT'] . $item->href;
if (Zend_Loader::isReadable($file)) {
$cssContent .= file_get_contents($file) . PHP_EOL;
}
}
$cssContent = $this->_minifier->minify($cssContent);
file_put_contents($path . "/" . $filename, $cssContent);
}
$this->appendStylesheet($cachedir . "/" . $filename, $media);
}
ZFE_Util_Stopwatch::trigger(__METHOD__);
return parent::toString($indent);
}
