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<?php |
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namespace Upress\EzCache\FileOptimizer; |
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|
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use MatthiasMullie\Minify\JS; |
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|
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class JsCombiner extends BaseFileOptimizer { |
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static $FILE_TYPE = 'js'; |
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|
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protected $minifier; |
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protected $jquery_url; |
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protected $minify_base_path; |
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protected $minify_base_url; |
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protected $in_location; |
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private $scripts = []; |
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|
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function __construct( $cache_dir, $cache_url, $location='all' ) { |
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$this->minifier = new JS(); |
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$this->jquery_url = $this->get_jquery_url(); |
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$this->minify_base_path = $cache_dir; |
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$this->minify_base_url = $cache_url; |
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$this->in_location = $location; |
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} |
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|
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/** |
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* Gets jQuery URL if defer JS safe mode is active |
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* |
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* @return bool|string |
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*/ |
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protected function get_jquery_url() { |
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global $wp_scripts; |
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|
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if ( ! isset( $wp_scripts->registered['jquery-core']->src ) ) { |
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return false; |
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} |
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|
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if ( '' === $this->get_url_component( $wp_scripts->registered['jquery-core']->src, PHP_URL_HOST ) ) { |
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return wp_parse_url( site_url( $wp_scripts->registered['jquery-core']->src ), PHP_URL_PATH ); |
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} |
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|
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return $wp_scripts->registered['jquery-core']->src; |
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} |
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|
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/** |
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* Minifies and combines JavaScripts into one |
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* |
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* @param string $html HTML content. |
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* @return string |
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*/ |
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function optimize( $html ) { |
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$html_buff = $html; |
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if ( 'head' === $this->in_location ) { |
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$html_buff = substr( $html_buff, 0, strpos( $html_buff, '</head>' ) ); |
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} else if ( 'body' === $this->in_location ) { |
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$html_buff = substr( $html_buff, strpos( $html_buff, '</head>' ) ); |
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} |
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$scripts = $this->find( '<script.*<\/script>', $html_buff ); |
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|
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if ( ! $scripts ) { |
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return $html; |
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} |
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|
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// Parses found nodes to keep only the ones to combine |
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$combine_scripts = $this->parse( $scripts ); |
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|
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if ( empty( $combine_scripts ) ) { |
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return $html; |
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} |
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|
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// Gets content for each script either from inline or from src |
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$content = $this->get_content(); |
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|
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if ( empty( $content ) ) { |
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return $html; |
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} |
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|
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// Creates the minify URL if the minification is successful |
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$minify_url = $this->combine( $content ); |
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|
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if ( ! $minify_url ) { |
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return $html; |
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} |
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|
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if ( 'head' === $this->in_location ) { |
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$html = str_replace( '</head>', '<script src="' . esc_url( $minify_url ) . '" data-minify="1"></script></head>', $html ); |
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} else { |
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$html = str_replace( '</body>', '<script src="' . esc_url( $minify_url ) . '" data-minify="1"></script></body>', $html ); |
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} |
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|
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$combine_scripts = array_filter( $combine_scripts ); |
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foreach ( $combine_scripts as $script ) { |
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$html = str_replace( $script[0], '', $html ); |
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} |
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|
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return $html; |
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} |
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|
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/** |
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* Parses found nodes to keep only the ones to combine |
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* |
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* @param array $scripts scripts corresponding to JS file or content. |
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* |
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* @return array |
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*/ |
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function parse( $scripts ) { |
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$scripts = array_map( function( $script ) { |
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preg_match( '/<script\s+([^>]+[\s\'"])?src\s*=\s*[\'"]\s*?([^\'"]+\.js(?:\?[^\'"]*)?)\s*?[\'"]([^>]+)?\/?>/Umsi', $script[0], $matches ); |
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|
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if ( isset( $matches[2] ) ) { |
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if ( $this->is_external_file( $matches[2] ) ) { |
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foreach ( $this->get_excluded_external_file_path() as $excluded_file ) { |
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if ( false !== strpos( $matches[2], $excluded_file ) ) { |
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return []; |
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} |
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} |
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|
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$this->scripts[] = [ |
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'type' => 'url', |
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'content' => $matches[2], |
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]; |
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|
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return $script; |
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} |
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|
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if ( $this->is_minify_excluded_file( $matches ) ) { |
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return []; |
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} |
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|
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if ( $this->jquery_url && false !== strpos( $matches[2], $this->jquery_url ) ) { |
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return []; |
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} |
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|
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$file_path = $this->get_file_path( $matches[2] ); |
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|
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if ( ! $file_path ) { |
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return []; |
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} |
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|
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$this->scripts[] = [ |
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'type' => 'file', |
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'content' => $file_path, |
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]; |
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} elseif ( ! isset( $matches[2] ) ) { |
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preg_match( '/<script\b([^>]*)>(?:\/\*\s*<!\[CDATA\[\s*\*\/)?\s*([\s\S]*?)\s*(?:\/\*\s*\]\]>\s*\*\/)?<\/script>/msi', $script[0], $matches_inline ); |
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|
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if ( strpos( $matches_inline[1], 'type' ) !== false && ! preg_match( '/type\s*=\s*["\']?(?:text|application)\/(?:(?:x\-)?javascript|ecmascript)["\']?/i', $matches_inline[1] ) ) { |
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return []; |
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} |
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|
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if ( false !== strpos( $matches_inline[1], 'src=' ) ) { |
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return []; |
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} |
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|
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$test_localize_script = str_replace( array( "\r", "\n" ), '', $matches_inline[2] ); |
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|
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if ( in_array( $test_localize_script, $this->get_localized_scripts(), true ) ) { |
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return []; |
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} |
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|
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foreach ( $this->get_excluded_inline_content() as $excluded_content ) { |
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if ( false !== strpos( $matches_inline[2], $excluded_content ) ) { |
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return []; |
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} |
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} |
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|
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$this->scripts[] = [ |
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'type' => 'inline', |
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'content' => $matches_inline[2], |
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]; |
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} |
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|
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return $script; |
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}, $scripts ); |
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|
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return array_filter( $scripts ); |
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} |
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|
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/** |
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* Gets content for each script either from inline or from src |
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* |
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* @return string |
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*/ |
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protected function get_content() { |
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$content = ''; |
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|
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foreach ( $this->scripts as $script ) { |
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if ( 'file' === $script['type'] ) { |
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$file_content = file_get_contents( $script['content'] ); |
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$content .= $file_content; |
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|
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$this->minifier->add( $file_content ); |
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} elseif ( 'url' === $script['type'] ) { |
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$file_content = file_get_contents( esc_url( $script['content'] ) ); |
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$content .= $file_content; |
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|
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$this->minifier->add( $file_content ); |
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} elseif ( 'inline' === $script['type'] ) { |
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$inline_js = rtrim( $script['content'], ";\n\t\r" ) . ';'; |
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$content .= $inline_js; |
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|
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$this->minifier->add( $inline_js ); |
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} |
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} |
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|
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return $content; |
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} |
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|
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/** |
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* Creates the minify URL if the minification is successful |
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* |
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* @param string $content Content to minify & combine. |
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|
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* @return string|bool The minify URL if successful, false otherwise |
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*/ |
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protected function combine( $content ) { |
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if ( empty( $content ) ) { |
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return false; |
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} |
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|
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$filename = md5( $content ) . '.js'; |
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$minified_file = $this->minify_base_path . $filename; |
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|
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if ( file_exists( $minified_file ) ) { |
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touch( $minified_file ); |
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} else { |
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$minified_content = $this->minifier->minify(); |
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|
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if ( ! $minified_content ) { |
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return false; |
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} |
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|
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wp_mkdir_p( dirname( $minified_file ) ); |
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$minify_filepath = file_put_contents( $minified_file, $minified_content ); |
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|
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if ( ! $minify_filepath ) { |
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return false; |
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} |
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} |
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|
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return $this->minify_base_url . $filename; |
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} |
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|
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/** |
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* Patterns in content excluded from being combined |
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* |
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* @return array |
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*/ |
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protected function get_excluded_inline_content() { |
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return [ |
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'document.write', |
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'google_ad', |
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'edToolbar', |
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'gtag', |
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'_gaq.push', |
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'_gaLt', |
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'GoogleAnalyticsObject', |
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'syntaxhighlighter', |
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'adsbygoogle', |
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'ci_cap_', |
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'_stq', |
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'nonce', |
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'post_id', |
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'LogHuman', |
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'idcomments_acct', |
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'ch_client', |
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'sc_online_t', |
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'_stq', |
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'bannersnack_embed', |
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'vtn_player_type', |
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'ven_video_key', |
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'ANS_customer_id', |
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'tdBlock', |
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'tdLocalCache', |
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'"url":', |
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'td_live_css_uid', |
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'tdAjaxCount', |
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'lazyLoadOptions', |
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'adthrive', |
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'loadCSS', |
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'google_tag_params', |
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'clicky_custom', |
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'clicky_site_ids', |
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'NSLPopupCenter', |
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'_paq', |
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'gtm', |
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'dataLayer', |
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'RecaptchaLoad', |
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'recaptcha', |
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'WPCOM_sharing_counts', |
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'jetpack_remote_comment', |
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'scrapeazon', |
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'subscribe-field', |
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'contextly', |
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]; |
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} |
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|
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/** |
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* Patterns in URL excluded from being combined |
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* |
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* @return array |
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*/ |
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protected function get_excluded_external_file_path() { |
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return [ |
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'html5.js', |
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'show_ads.js', |
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'histats.com/js', |
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'ws.amazon.com/widgets', |
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'/ads/', |
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'intensedebate.com', |
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'scripts.chitika.net/', |
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'jotform.com/', |
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'gist.github.com', |
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'forms.aweber.com', |
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'video.unrulymedia.com', |
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'stats.wp.com', |
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'stats.wordpress.com', |
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'widget.rafflecopter.com', |
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'widget-prime.rafflecopter.com', |
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'releases.flowplayer.org', |
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'c.ad6media.fr', |
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'cdn.stickyadstv.com', |
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'www.smava.de', |
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'contextual.media.net', |
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'app.getresponse.com', |
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'adserver.reklamstore.com', |
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's0.wp.com', |
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'wprp.zemanta.com', |
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'files.bannersnack.com', |
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'smarticon.geotrust.com', |
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'js.gleam.io', |
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'ir-na.amazon-adsystem.com', |
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'web.ventunotech.com', |
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'verify.authorize.net', |
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'ads.themoneytizer.com', |
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'embed.finanzcheck.de', |
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'imagesrv.adition.com', |
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'js.juicyads.com', |
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'form.jotformeu.com', |
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'speakerdeck.com', |
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'content.jwplatform.com', |
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'ads.investingchannel.com', |
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'app.ecwid.com', |
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'www.industriejobs.de', |
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's.gravatar.com', |
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'googlesyndication.com', |
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'a.optmstr.com', |
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'a.optmnstr.com', |
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'adthrive.com', |
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'mediavine.com', |
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'js.hsforms.net', |
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'googleadservices.com', |
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'f.convertkit.com', |
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'recaptcha/api.js', |
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]; |
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} |
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|
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/** |
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* Gets all localized scripts data to exclude them from combine. |
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* |
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* @return array |
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*/ |
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protected function get_localized_scripts() { |
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static $localized_scripts; |
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|
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if ( isset( $localized_scripts ) ) { |
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return $localized_scripts; |
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} |
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|
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$localized_scripts = []; |
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|
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foreach ( array_unique( wp_scripts()->queue ) as $item ) { |
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$data = wp_scripts()->print_extra_script( $item, false ); |
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|
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if ( empty( $data ) ) { |
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continue; |
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} |
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|
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$localized_scripts[] = '/* <![CDATA[ */' . $data . '/* ]]> */'; |
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} |
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|
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return $localized_scripts; |
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} |
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|
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} |
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|
