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<?php
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namespace WpAssetCleanUp\OptimiseAssets;
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use WpAssetCleanUp\Main;
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use WpAssetCleanUp\Menu;
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use WpAssetCleanUp\MetaBoxes;
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use WpAssetCleanUp\Misc;
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/**
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* Class MinifyJs
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* @package WpAssetCleanUp\OptimiseAssets
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*/
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class MinifyJs
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{
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/**
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* @param $jsContent
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*
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* @return string|string[]|null
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*/
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public static function applyMinification($jsContent)
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{
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if (class_exists('\MatthiasMullie\Minify\JS')) {
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$sha1OriginalContent = sha1($jsContent);
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$checkForAlreadyMinifiedShaOne = mb_strlen($jsContent) > 40000;
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// Let's check if the content is already minified
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// Save resources as the minify process can take time if the content is very large
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// Limit the total number of entries to 100: if it's more than that, it's likely because there's dynamic JS altering on every page load
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if ($checkForAlreadyMinifiedShaOne && OptimizeCommon::originalContentIsAlreadyMarkedAsMinified($sha1OriginalContent, 'scripts')) {
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return $jsContent;
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}
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// Minify it
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$alreadyMinified = false; // default
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$minifier = new \MatthiasMullie\Minify\JS($jsContent);
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$minifiedContent = trim($minifier->minify());
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if (trim($minifiedContent) === trim(trim($jsContent, ';'))) {
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$minifiedContent = $jsContent; // consider them the same if only the ';' at the end was stripped (it doesn't worth the resources that would be used)
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$alreadyMinified = true;
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}
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// If the resulting content is the same, mark it as minified to avoid the minify process next time
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if ($checkForAlreadyMinifiedShaOne && $alreadyMinified) {
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// If the resulting content is the same, mark it as minified to avoid the minify process next time
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OptimizeCommon::originalContentMarkAsAlreadyMinified( $sha1OriginalContent, 'scripts' );
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}
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return $minifiedContent;
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}
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return $jsContent;
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}
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/**
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* @param $src
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* @param string $handle
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*
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* @return bool
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*/
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public static function skipMinify($src, $handle = '')
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{
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// Things like WP Fastest Cache Toolbar JS shouldn't be minified and take up space on the server
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if ($handle !== '' && in_array($handle, Main::instance()->skipAssets['scripts'])) {
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return true;
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}
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$regExps = array(
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'#/wp-content/plugins/wp-asset-clean-up(.*?).js#',
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// Other libraries from the core that end in .min.js
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'#/wp-includes/(.*?).min.js#',
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// jQuery & jQuery Migrate
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'#/wp-includes/js/jquery/jquery.js#',
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'#/wp-includes/js/jquery/jquery-migrate.js#',
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// Files within /wp-content/uploads/
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// Files within /wp-content/uploads/ or /wp-content/cache/
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// Could belong to plugins such as "Elementor, "Oxygen" etc.
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//'#/wp-content/uploads/(.*?).js#',
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'#/wp-content/cache/(.*?).js#',
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// Already minified, and it also has a random name making the cache folder make bigger
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'#/wp-content/bs-booster-cache/#',
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// Elementor .min.js
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'#/wp-content/plugins/elementor/assets/(.*?).min.js#',
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// WooCommerce Assets
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'#/wp-content/plugins/woocommerce/assets/js/(.*?).min.js#',
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// Google Site Kit
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// The files are already optimized (they just have comments once in a while)
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// Minifying them causes some errors, so better to leave them load as they are
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'#/wp-content/plugins/google-site-kit/#',
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// TranslatePress Multilingual
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'#/translatepress-multilingual/assets/js/trp-editor.js#',
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);
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$regExps = Misc::replaceRelPluginPath($regExps);
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if (Main::instance()->settings['minify_loaded_js_exceptions'] !== '') {
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$loadedJsExceptionsPatterns = trim(Main::instance()->settings['minify_loaded_js_exceptions']);
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if (strpos($loadedJsExceptionsPatterns, "\n")) {
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// Multiple values (one per line)
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foreach (explode("\n", $loadedJsExceptionsPatterns) as $loadedJsExceptionPattern) {
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$regExps[] = '#'.trim($loadedJsExceptionPattern).'#';
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}
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} else {
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// Only one value?
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$regExps[] = '#'.trim($loadedJsExceptionsPatterns).'#';
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}
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}
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foreach ($regExps as $regExp) {
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if ( preg_match( $regExp, $src ) || ( strpos($src, $regExp) !== false ) ) {
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return true;
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}
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}
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return false;
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}
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/**
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* @param $htmlSource
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*
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* @return mixed|string
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*/
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public static function minifyInlineScriptTags($htmlSource)
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{
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if (stripos($htmlSource, '<script') === false) {
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return $htmlSource; // no SCRIPT tags, hmm
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}
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$skipTagsContaining = array_map( static function ( $toMatch ) {
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return preg_quote($toMatch, '/');
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}, array(
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'data-wpacu-skip',
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'/* <![CDATA[ */', // added via wp_localize_script()
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'wpacu-google-fonts-async-load',
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'wpacu-preload-async-css-fallback',
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/* [wpacu_pro] */'data-wpacu-inline-js-file',/* [/wpacu_pro] */
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'document.body.prepend(wpacuLinkTag',
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'var wc_product_block_data = JSON.parse( decodeURIComponent(',
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'/(^|\s)(no-)?customize-support(?=\s|$)/', // WP Core
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'b[c] += ( window.postMessage && request ? \' \' : \' no-\' ) + cs;', // WP Core
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'data-wpacu-own-inline-script', // Only shown to the admin, irrelevant for any optimization (save resources)
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// [wpacu_pro]
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'data-wpacu-inline-js-file', // already minified/optimized since the INLINE was generated from the cached file
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// [/wpacu_pro]
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));
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// Do not perform another \DOMDocument call if it was done already somewhere else (e.g. CombineJs)
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$fetchType = 'regex'; // 'regex' or 'dom'
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if ($fetchType === 'regex') {
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preg_match_all( '@(<script[^>]*?>).*?</script>@si', $htmlSource, $matchesScriptTags, PREG_SET_ORDER );
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if ( $matchesScriptTags === null ) {
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return $htmlSource;
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}
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foreach ($matchesScriptTags as $matchedScript) {
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if (isset($matchedScript[0]) && $matchedScript[0]) {
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$originalTag = $matchedScript[0];
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if (strpos($originalTag, 'src=') && strtolower(substr($originalTag, -strlen('></script>'))) === strtolower('></script>')) {
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// Only inline SCRIPT tags allowed
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continue;
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}
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// No need to use extra resources as the tag is already minified
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if ( preg_match( '/(' . implode( '|', $skipTagsContaining ) . ')/', $originalTag ) ) {
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continue;
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}
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// Only 'text/javascript' type is allowed for minification
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$scriptType = Misc::getValueFromTag($originalTag, 'type') ?: 'text/javascript'; // default
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if ($scriptType !== 'text/javascript') {
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continue;
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}
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$tagOpen = $matchedScript[1];
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$withTagOpenStripped = substr($originalTag, strlen($tagOpen));
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$originalTagContents = substr($withTagOpenStripped, 0, -strlen('</script>'));
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$newTagContents = OptimizeJs::maybeAlterContentForInlineScriptTag( $originalTagContents, true );
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if ( $newTagContents !== $originalTagContents ) {
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$htmlSource = str_ireplace( '>' . $originalTagContents . '</script', '>' . $newTagContents . '</script', $htmlSource );
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}
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}
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}
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}
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return $htmlSource;
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}
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/**
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* @return bool
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*/
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public static function isMinifyJsEnabled()
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{
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if (defined('WPACU_IS_MINIFY_JS_ENABLED')) {
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return WPACU_IS_MINIFY_JS_ENABLED;
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}
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// Request Minify On The Fly
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// It will preview the page with JS minified
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// Only if the admin is logged-in as it uses more resources (CPU / Memory)
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if ( isset($_GET['wpacu_js_minify']) && Menu::userCanManageAssets()) {
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self::isMinifyJsEnabledChecked('true');
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return true;
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}
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if ( isset($_REQUEST['wpacu_no_js_minify']) || // not on query string request (debugging purposes)
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is_admin() || // not for Dashboard view
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(! Main::instance()->settings['minify_loaded_js']) || // Minify JS has to be Enabled
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(Main::instance()->settings['test_mode'] && ! Menu::userCanManageAssets()) ) { // Does not trigger if "Test Mode" is Enabled
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self::isMinifyJsEnabledChecked('false');
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return false;
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}
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$isSingularPage = defined('WPACU_CURRENT_PAGE_ID') && WPACU_CURRENT_PAGE_ID > 0 && is_singular();
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if ($isSingularPage || Misc::isHomePage()) {
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// If "Do not minify JS on this page" is checked in "Asset CleanUp: Options" side meta box
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if ($isSingularPage) {
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$pageOptions = MetaBoxes::getPageOptions( WPACU_CURRENT_PAGE_ID ); // Singular page
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} else {
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$pageOptions = MetaBoxes::getPageOptions(0, 'front_page'); // Home page
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}
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if ( isset( $pageOptions['no_js_minify'] ) && $pageOptions['no_js_minify'] ) {
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self::isMinifyJsEnabledChecked('false');
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return false;
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}
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}
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if (OptimizeJs::isOptimizeJsEnabledByOtherParty('if_enabled')) {
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self::isMinifyJsEnabledChecked('false');
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return false;
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}
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self::isMinifyJsEnabledChecked('true');
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return true;
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}
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/**
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* @param $value
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*/
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public static function isMinifyJsEnabledChecked($value)
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{
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if (! defined('WPACU_IS_MINIFY_JS_ENABLED')) {
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if ($value === 'true') {
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define( 'WPACU_IS_MINIFY_JS_ENABLED', true );
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} elseif ($value === 'false') {
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define( 'WPACU_IS_MINIFY_JS_ENABLED', false );
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}
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}
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}
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}
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