wdev-smush-fix-keep-showing-reconvert-webp.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
class WDEV_Smush_Fix_Keep_Showing_Resmush {
	private $smush_settings;
	private $webp_helper;
	private $webp_dir;
	private $media_item_cache;
	public $exclude_size_names = array( 'full' );
	public function __construct() {
		$this->smush_settings = Smush\Core\Settings::get_instance();
		$should_optimize_original = $this->smush_settings->get( 'original' );
		if ( ! $this->smush_settings->is_webp_module_active() || ! $should_optimize_original ) {
			return;
		}

		$this->webp_helper      = new Smush\Core\Webp\Webp_Helper();
		$this->webp_dir         = new Smush\Core\Webp\Webp_Dir();
		$this->media_item_cache = Smush\Core\Media\Media_Item_Cache::get_instance();

		add_filter( 'wp_smush_scan_library_slice_handle_attachment', array( $this, 'maybe_disable_local_webp' ), 0, 2 );
		add_filter( 'wp_smush_scan_library_slice_handle_attachment', array( $this, 'maybe_revert_local_webp_status' ), 999, 2 );
	}

	public function maybe_disable_local_webp( $slice_data, $attachment_id ) {
		if ( $this->is_webp_converted( $attachment_id ) ) {
			$this->temporary_disable_local_webp();
		}
		return $slice_data;
	}

	private function is_webp_converted ( $attachment_id ) {
		if ( $this->webp_helper->get_webp_flag( $attachment_id ) ) {
			return true;
		}
		return $this->is_all_thumbnail_sizes_converted_to_webp( $attachment_id );
	}

	private function is_all_thumbnail_sizes_converted_to_webp( $attachment_id ) {
		$media_item = $this->media_item_cache->get( $attachment_id );
		foreach ( $media_item->get_sizes() as $size ) {
			if ( in_array( $size->get_key(), $this->exclude_size_names ) ) {
				continue;
			}
			$webp_file_path = $this->webp_helper->get_webp_file_path( $size->get_file_path() );
			if ( ! file_exists( $webp_file_path ) ) {
				$webp_file_path = false;
				break;
			}
		}
		if ( empty( $webp_file_path ) ) {
			return false;
		}
		// Update webp flag.
		$relative_path = substr( $webp_file_path, strlen( $this->webp_dir->get_webp_path() . '/' ) );
		$this->webp_helper->update_webp_flag( $attachment_id, $relative_path );
		return true;
	}

	public function maybe_revert_local_webp_status( $slice_data, $attachment_id ) {
		if ( has_filter( 'pre_update_option_wp-smush-settings', array( $this, 'temporary_disable_save_settings') ) ) {
			$this->revert_local_webp_status();
		}
		return $slice_data;
	}

	private function temporary_disable_local_webp() {
		add_filter( 'pre_update_site_option_wp-smush-settings', array( $this, 'temporary_disable_save_settings' ), 10, 2 );
		add_filter( 'pre_update_option_wp-smush-settings', array( $this, 'temporary_disable_save_settings' ), 10, 2 );
		$this->smush_settings->set( 'webp_mod', false );
	}

	private function revert_local_webp_status() {
		$this->smush_settings->set( 'webp_mod', true );
		remove_filter( 'pre_update_site_option_wp-smush-settings', array( $this, 'temporary_disable_save_settings' ), 10, 2 );
		remove_filter( 'pre_update_option_wp-smush-settings', array( $this, 'temporary_disable_save_settings' ), 10, 2 );
	}

	public function temporary_disable_save_settings( $value, $old_value ) {
		return $old_value;
	}
}

add_action( 'plugins_loaded', function() {
	if ( ! class_exists('WP_Smush' )
		|| ! class_exists('Smush\Core\Settings' )
		|| ! class_exists( 'Smush\Core\Webp\Webp_Helper' )
		|| ! class_exists( 'Smush\Core\Media\Media_Item_Cache' )
		|| ! class_exists( 'Smush\Core\Webp\webp_dir' )
	) {
		return;
	}
	new WDEV_Smush_Fix_Keep_Showing_Resmush();
}, 99);