160 lines
4.1 KiB
PHP
160 lines
4.1 KiB
PHP
<?php
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/**
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* Minifier Class
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*
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* Handles CSS and JS minification
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*/
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if (!defined('ABSPATH')) {
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exit;
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}
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class OptiCore_Minifier {
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private static $instance = null;
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private $minified_dir;
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public static function get_instance() {
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if (null === self::$instance) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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private function __construct() {
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$this->minified_dir = WP_CONTENT_DIR . '/cache/opticore/minified';
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}
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public function init() {
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$settings = get_option('opticore_settings');
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if (!empty($settings['enable_minify_css'])) {
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add_filter('style_loader_tag', array($this, 'minify_css_tag'), 10, 4);
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}
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if (!empty($settings['enable_minify_js'])) {
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add_filter('script_loader_tag', array($this, 'minify_js_tag'), 10, 3);
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}
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// Defer non-critical JS
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add_filter('script_loader_tag', array($this, 'defer_scripts'), 10, 3);
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}
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/**
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* Minify CSS
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*/
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public function minify_css($css) {
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// Remove comments
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$css = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $css);
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// Remove whitespace
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$css = str_replace(array("\r\n", "\r", "\n", "\t"), '', $css);
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$css = preg_replace('/\s+/', ' ', $css);
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$css = str_replace(array(' {', '{ '), '{', $css);
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$css = str_replace(array(' }', '} '), '}', $css);
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$css = str_replace(array(' :', ': '), ':', $css);
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$css = str_replace(array(' ;', '; '), ';', $css);
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$css = str_replace(array(' ,', ', '), ',', $css);
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return trim($css);
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}
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/**
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* Minify JavaScript
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*/
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public function minify_js($js) {
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// Remove comments (simple version - doesn't handle all cases)
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$js = preg_replace('/((?:\/\*(?:[^*]|(?:\*+[^*\/]))*\*+\/)|(?:\/\/.*))/', '', $js);
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// Remove whitespace
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$js = preg_replace('/\s+/', ' ', $js);
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return trim($js);
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}
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/**
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* Process CSS tag for minification
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*/
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public function minify_css_tag($html, $handle, $href, $media) {
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// Skip external files
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if (strpos($href, site_url()) === false) {
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return $html;
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}
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// Skip already minified files
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if (strpos($href, '.min.') !== false) {
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return $html;
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}
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return $html;
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}
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/**
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* Process JS tag for minification
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*/
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public function minify_js_tag($tag, $handle, $src) {
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// Skip external files
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if (strpos($src, site_url()) === false) {
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return $tag;
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}
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// Skip already minified files
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if (strpos($src, '.min.') !== false) {
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return $tag;
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}
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return $tag;
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}
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/**
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* Defer non-critical JavaScript
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*/
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public function defer_scripts($tag, $handle, $src) {
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// Skip jQuery and critical scripts
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$critical_scripts = array('jquery', 'jquery-core', 'jquery-migrate');
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if (in_array($handle, $critical_scripts)) {
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return $tag;
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}
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// Add defer attribute
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if (strpos($tag, 'defer') === false && strpos($tag, 'async') === false) {
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return str_replace(' src', ' defer src', $tag);
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}
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return $tag;
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}
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/**
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* Combine CSS files
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*/
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public function combine_css_files($files) {
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$combined = '';
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foreach ($files as $file) {
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if (file_exists($file)) {
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$content = file_get_contents($file);
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$combined .= $this->minify_css($content) . "\n";
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}
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}
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return $combined;
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}
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/**
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* Combine JS files
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*/
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public function combine_js_files($files) {
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$combined = '';
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foreach ($files as $file) {
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if (file_exists($file)) {
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$content = file_get_contents($file);
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$combined .= $this->minify_js($content) . ";\n";
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}
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}
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return $combined;
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}
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}
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