143 lines
3 KiB
PHP
143 lines
3 KiB
PHP
<?php
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declare(strict_types=1);
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namespace WP_Rocket\Engine\Optimization\DelayJS;
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use WP_Rocket\Admin\Options_Data;
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use WP_Rocket\Event_Management\Subscriber_Interface;
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class Subscriber implements Subscriber_Interface {
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/**
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* HTML instance.
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*
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* @since 3.7
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*
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* @var HTML
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*/
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private $html;
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/**
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* WP_Filesystem_Direct instance.
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*
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* @since 3.7
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*
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* @var \WP_Filesystem_Direct
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*/
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private $filesystem;
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/**
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* Options Data instance
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*
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* @var Options_Data
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*/
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private $options;
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/**
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* Script enqueued status.
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*
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* @since 3.7
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*
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* @var bool
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*/
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private $is_enqueued = false;
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/**
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* Subscriber constructor.
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*
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* @param HTML $html HTML Instance.
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* @param \WP_Filesystem_Direct $filesystem The Filesystem object.
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* @param Options_Data $options Options data instance.
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*/
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public function __construct( HTML $html, $filesystem, Options_Data $options ) {
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$this->html = $html;
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$this->filesystem = $filesystem;
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$this->options = $options;
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}
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/**
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* Return an array of events that this subscriber wants to listen to.
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*
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* @since 3.7
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*
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* @return array
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*/
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public static function get_subscribed_events() {
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return [
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'rocket_buffer' => [
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[ 'delay_js', 26 ],
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[ 'add_delay_js_script', 26 ],
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],
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'pre_get_rocket_option_minify_concatenate_js' => 'maybe_disable_option',
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];
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}
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/**
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* Modifies scripts HTML to apply delay JS attribute
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*
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* @since 3.7
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*
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* @param string $buffer_html Html for the page.
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*
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* @return string
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*/
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public function delay_js( $buffer_html ) {
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return $this->html->delay_js( $buffer_html );
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}
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/**
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* Displays the inline script to the head when the option is enabled.
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*
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* @since 3.9.4 Move meta charset to head.
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* @since 3.9 Hooked on rocket_buffer, display the script right after <head>
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* @since 3.7
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*
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* @param string $html HTML content.
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*
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* @return string
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*/
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public function add_delay_js_script( $html ): string {
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if ( ! $this->html->is_allowed() ) {
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return $html;
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}
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$pattern = '/<head[^>]*>/i';
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$lazyload_script = $this->filesystem->get_contents( rocket_get_constant( 'WP_ROCKET_PATH' ) . 'assets/js/lazyload-scripts.min.js' );
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$replaced_html = $html;
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if ( false !== $lazyload_script ) {
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$replaced_html = preg_replace( $pattern, "$0<script>{$lazyload_script}</script>", $replaced_html, 1 );
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if ( empty( $replaced_html ) ) {
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return $html;
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}
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}
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$replaced_html = preg_replace( $pattern, '$0<script>' . $this->html->get_ie_fallback() . '</script>', $replaced_html, 1 );
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if ( empty( $replaced_html ) ) {
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return $html;
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}
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return $this->html->move_meta_charset_to_head( $replaced_html );
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}
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/**
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* Disables defer JS if delay JS is enabled
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*
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* @since 3.9
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*
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* @param null $value Original value. Should be always null.
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*
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* @return null|false
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*/
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public function maybe_disable_option( $value ) {
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if ( $this->html->is_allowed() ) {
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return false;
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}
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return $value;
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}
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}
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