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<?php |
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namespace Halfpastfour\HeadMinifier\View\Helper; |
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use MatthiasMullie\Minify; |
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/** |
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* Class HeadLink |
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* |
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* @package Halfpastfour\HeadMinifier\View\Helper |
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* |
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* Proxies to container methods: |
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* @method string|int getWhitespace(string | int $indent) |
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* @method string|int getIndent() |
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* @method string getSeparator() |
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*/ |
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class HeadLink extends \Zend\View\Helper\HeadLink |
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{ |
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/** |
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* @var array |
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*/ |
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private $options = []; |
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/** |
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* @var string |
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*/ |
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private $baseUrl = ''; |
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/** |
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* HeadLink constructor. |
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* |
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* @param array $config |
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* @param string $baseUrl |
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*/ |
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public function __construct(array $config, string $baseUrl) |
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{ |
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$this->options = $config; |
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$this->baseUrl = $baseUrl; |
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parent::__construct(); |
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} |
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/** |
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* @param string|int $indent |
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* |
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* @return string |
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*/ |
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public function toString($indent = null): string |
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{ |
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// If configuration tells us minifying is not enabled, use the default view helper. |
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if (! $this->options['enabled']) { |
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return parent::toString($indent); |
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} |
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$cacheItems = []; |
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$publicDir = $this->options['directories']['public']; |
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$cacheDir = $this->options['directories']['cache']; |
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// Process all items. The items that don't require any changes will be returned in $items. The items that will |
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// be cached will be returned in $cacheItems. |
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$items = $this->processItems($publicDir, $cacheItems); |
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$indent = (null !== $indent) |
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? $this->getWhitespace($indent) |
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: $this->getIndent(); |
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$identifier = sha1(implode($cacheItems)); |
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$minifiedFile = "/{$identifier}.min.css"; |
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// Create a minified file containing all cache items. Return the name of the minified file as the last item in |
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// returned in $items. |
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$links = $this->minifyFile($minifiedFile, $publicDir, $cacheDir, $cacheItems, $items) |
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// Generate the links |
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->generateLinks($items); |
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return $indent . implode($this->escape($this->getSeparator()) . $indent, $links); |
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} |
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/** |
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* @param string $publicDir |
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* @param array $cacheItems |
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* |
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* @return array |
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*/ |
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private function processItems($publicDir, array &$cacheItems) |
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{ |
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$items = []; |
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foreach ($this as $index => $item) { |
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if (! $item->href || $item->type != 'text/css') { |
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continue; |
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} |
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$localUri = str_replace($this->baseUrl, '', preg_replace('/\?.*/', '', $publicDir . $item->href)); |
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$remoteUri = $item->href; |
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$handle = curl_init($remoteUri); |
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curl_setopt($handle, CURLOPT_RETURNTRANSFER, true); |
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if (is_file($localUri)) { |
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$cacheItems[$index] = $localUri; |
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continue; |
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} |
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if (curl_exec($handle) !== false) { |
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$cacheItems[$index] = $remoteUri; |
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continue; |
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} |
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$items[$index] = $item; |
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} |
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return $items; |
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} |
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/** |
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* @param string $publicDir |
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* @param string $cacheDir |
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* @param string $minifiedFileName |
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* |
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* @return string |
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*/ |
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private function generateMinifiedFilePath($publicDir, $cacheDir, $minifiedFileName) |
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{ |
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$minifiedFilePath = $cacheDir . $minifiedFileName; |
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if (strpos($minifiedFilePath, $publicDir) === 0) { |
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$minifiedFilePath = substr($minifiedFilePath, strlen($publicDir)) ?: $minifiedFilePath; |
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} |
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return $this->baseUrl . $minifiedFilePath; |
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} |
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/** |
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* @param string $minifiedFileName |
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* @param string $publicDir |
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* @param string $cacheDir |
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* @param array $cacheItems |
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* @param array $items |
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* |
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* @return $this |
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*/ |
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private function minifyFile($minifiedFileName, $publicDir, $cacheDir, array $cacheItems, array &$items) |
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{ |
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if (! empty($cacheItems)) { |
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if (! is_file($cacheDir . $minifiedFileName)) { |
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$minifier = new Minify\CSS(); |
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array_map(function ($uri) use ($minifier) { |
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$minifier->add($uri); |
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}, $cacheItems); |
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$minifier->minify($cacheDir . $minifiedFileName); |
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} |
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// Add the minified file tot the list of items. |
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$items[] = $this->createData([ |
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'type' => 'text/css', |
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'rel' => 'stylesheet', |
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'href' => $this->generateMinifiedFilePath($publicDir, $cacheDir, $minifiedFileName), |
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'conditionalStylesheet' => false, |
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]); |
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} |
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return $this; |
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} |
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/** |
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* @param array $items |
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* |
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* @return array |
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*/ |
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private function generateLinks(array $items) |
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{ |
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if (empty($items)) { |
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return []; |
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} |
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$links = []; |
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foreach ($items as $item) { |
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$links[] = $this->itemToString($item); |
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} |
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return $links; |
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} |
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} |
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halfpastfouram /
zend-headminifier
