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<?php |
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declare( strict_types=1 ); |
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|
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namespace GutSlider\Style; |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* Generates and enqueues dynamic CSS for rendered slider blocks. |
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* |
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* Collects block-level styles during rendering, combines and minifies |
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* them into a single CSS file, and enqueues it for the current page. |
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* |
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* @package GutSlider\Style |
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* @since 3.0.0 |
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*/ |
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final class DynamicStyle { |
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|
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/** |
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* Collected CSS styles from rendered blocks. |
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* |
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* @since 3.0.0 |
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* @var array<int, string> |
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*/ |
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private array $styles = array(); |
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|
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/** |
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* Absolute path to the CSS upload directory. |
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* |
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* @since 3.0.0 |
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* @var string |
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*/ |
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private string $upload_dir; |
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|
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/** |
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* Public URL to the CSS upload directory. |
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* |
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* @since 3.0.0 |
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* @var string |
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*/ |
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private string $upload_url; |
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|
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/** |
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* Constructor. |
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* |
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* Sets up the upload directory and registers rendering hooks. |
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* |
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* @since 3.0.0 |
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*/ |
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public function __construct() { |
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add_filter( 'render_block', array( $this, 'collect_block_styles' ), 10, 2 ); |
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|
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if ( wp_is_block_theme() ) { |
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add_action( 'wp_enqueue_scripts', array( $this, 'generate_and_enqueue_combined_css' ) ); |
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} else { |
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add_action( 'wp_footer', array( $this, 'generate_and_enqueue_combined_css' ) ); |
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} |
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|
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$upload_dir = wp_upload_dir(); |
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$this->upload_dir = $upload_dir['basedir'] . '/gutslider-styles/'; |
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$this->upload_url = $upload_dir['baseurl'] . '/gutslider-styles/'; |
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|
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if ( ! file_exists( $this->upload_dir ) ) { |
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wp_mkdir_p( $this->upload_dir ); |
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} |
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} |
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|
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/** |
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* Collect CSS styles from a rendered block. |
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* |
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* Inspects the block's attributes for inline styles and stores |
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* them for later combination into a single CSS file. |
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* |
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* @since 3.0.0 |
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* |
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* @param string $block_content The rendered block HTML. |
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* @param array<string, mixed> $block The block data array. |
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* @return string The unmodified block content. |
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*/ |
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public function collect_block_styles( string $block_content, array $block ): string { |
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if ( isset( $block['blockName'] ) && str_contains( $block['blockName'], 'gutsliders/' ) ) { |
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do_action( 'gutsliders_render_block', $block ); |
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|
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if ( isset( $block['attrs']['blockStyle'] ) ) { |
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$style = $block['attrs']['blockStyle']; |
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|
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if ( is_array( $style ) && ! empty( $style ) ) { |
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$style = implode( ' ', $style ); |
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} |
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|
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if ( is_string( $style ) && '' !== $style ) { |
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$this->styles[] = wp_strip_all_tags( $style ); |
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} |
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} |
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} |
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|
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return $block_content; |
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} |
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|
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/** |
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* Generate and enqueue the combined CSS file. |
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* |
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* Combines all collected styles, minifies the result, writes it |
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* to a file in the uploads directory, and enqueues it. |
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* |
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* @since 3.0.0 |
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* |
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* @return void |
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*/ |
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public function generate_and_enqueue_combined_css(): void { |
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if ( empty( $this->styles ) ) { |
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return; |
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} |
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|
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$combined_css = implode( "\n", $this->styles ); |
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$minified_css = $this->minify_css( $combined_css ); |
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|
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$post_id = get_the_ID(); |
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$file_suffix = $post_id ? (string) $post_id : 'archive-' . md5( wp_json_encode( array_keys( $this->styles ) ) ); |
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$css_file_name = 'gutslider-styles-' . $file_suffix . '.min.css'; |
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$css_file_path = $this->upload_dir . $css_file_name; |
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$css_file_url = $this->upload_url . $css_file_name; |
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|
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global $wp_filesystem; |
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|
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if ( empty( $wp_filesystem ) ) { |
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require_once ABSPATH . 'wp-admin/includes/file.php'; |
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WP_Filesystem(); |
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} |
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|
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$existing_content = $wp_filesystem->exists( $css_file_path ) |
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? $wp_filesystem->get_contents( $css_file_path ) |
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: ''; |
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|
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if ( $existing_content !== $minified_css ) { |
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$wp_filesystem->put_contents( $css_file_path, $minified_css, FS_CHMOD_FILE ); |
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} |
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|
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if ( file_exists( $css_file_path ) && is_readable( $css_file_path ) ) { |
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$version = (string) filemtime( $css_file_path ); |
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} else { |
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$version = (string) time(); |
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} |
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|
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if ( file_exists( $css_file_path ) ) { |
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wp_enqueue_style( |
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'gutslider-combined-styles', |
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$css_file_url, |
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array(), |
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$version |
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); |
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} |
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} |
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|
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/** |
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* Minify a CSS string. |
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* |
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* Removes comments, unnecessary whitespace, and extra spaces |
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* around colons to reduce file size. |
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* |
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* @since 3.0.0 |
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* |
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* @param string $css The raw CSS string. |
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* @return string The minified CSS string. |
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*/ |
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private function minify_css( string $css ): string { |
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// Remove comments. |
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$css = (string) preg_replace( '!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $css ); |
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|
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// Remove space after colons. |
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$css = str_replace( ': ', ':', $css ); |
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|
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// Remove whitespace. |
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$css = str_replace( array( "\r\n", "\r", "\n", "\t", ' ', ' ', ' ' ), '', $css ); |
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|
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return $css; |
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} |
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} |
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