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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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use Zend\View\Renderer\PhpRenderer; |
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/** |
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* Class HeadScript |
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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 HeadScript extends \Zend\View\Helper\HeadScript |
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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 $publicDir = ''; |
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/** |
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* @var string |
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*/ |
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private $cacheDir = ''; |
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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->publicDir = $this->options['directories']['public']; |
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$this->cacheDir = $this->options['directories']['cache']; |
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$this->baseUrl = $baseUrl; |
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parent::__construct(); |
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} |
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/** |
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* @param string $indent |
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* |
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* @return string |
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*/ |
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public function toString($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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// 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 = $this->processItems($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.js"; |
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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 $items. |
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$scripts = $this->minifyFile($minifiedFile, $cacheItems, $items) |
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// Generate the script tags. |
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->generateScripts($items, $indent); |
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return $indent . implode($this->escape($this->getSeparator()) . $indent, $scripts); |
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} |
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/** |
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* @param array $cacheItems |
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* |
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* @return array |
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*/ |
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private function processItems(array &$cacheItems): array |
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{ |
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$items = []; |
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foreach ($this as $index => $item) { |
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if ($item->type !== 'text/javascript' && (! @$item->attributes['src'] || ! $item->source)) { |
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$items[] = $item; |
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continue; |
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} |
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$localUri = str_replace( |
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$this->baseUrl, |
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'', |
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preg_replace('/\?.*/', '', $this->publicDir . @$item->attributes['src']) |
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); |
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$remoteUri = @$item->attributes['src']; |
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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] = $remoteUri; |
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continue; |
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} |
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if ($remoteUri || $item->source) { |
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$items[$index] = $item; |
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} |
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} |
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return $items; |
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} |
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/** |
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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(string $minifiedFileName): string |
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{ |
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$minifiedFilePath = $this->cacheDir . $minifiedFileName; |
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if (strpos($minifiedFilePath, $this->publicDir) === 0) { |
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$minifiedFilePath = substr($minifiedFilePath, strlen($this->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 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(string $minifiedFileName, array $cacheItems, array &$items): HeadScript |
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{ |
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if (! empty($cacheItems)) { |
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if (! is_file($this->cacheDir . $minifiedFileName)) { |
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$minifier = new Minify\JS(); |
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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($this->cacheDir . $minifiedFileName); |
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} |
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// Add the minified file to the list of items. |
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$items[] = $this->createData('text/javascript', [ |
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'src' => $this->generateMinifiedFilePath($minifiedFileName), |
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]); |
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} |
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return $this; |
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} |
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/** |
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* @return bool |
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*/ |
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private function isUseCdata(): bool |
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{ |
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$view = $this->view; |
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$useCdata = $this->useCdata; |
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if ($view instanceof PhpRenderer) { |
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/** @var \Zend\View\Helper\Doctype $plugin */ |
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$plugin = $view->plugin('doctype'); |
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$useCdata = $plugin->isXhtml(); |
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} |
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return $useCdata; |
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} |
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/** |
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* @param array $items |
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* @param string $indent |
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* |
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* @return array |
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*/ |
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private function generateScripts(array $items, $indent): array |
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{ |
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$useCdata = $this->isUseCdata(); |
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$escapeStart = ($useCdata) ? '//<![CDATA[' : '//<!--'; |
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$escapeEnd = ($useCdata) ? '//]]>' : '//-->'; |
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$scripts = []; |
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foreach ($items as $item) { |
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$scripts[] = $this->itemToString($item, $indent, $escapeStart, $escapeEnd); |
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} |
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return $scripts; |
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} |
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} |
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