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<?php

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/**

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* The class to operate media data.

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* @package LiteSpeed

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* @since 1.4

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namespace LiteSpeed;

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defined( 'WPINC' ) || exit();

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/**

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* Class Media

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* Handles media-related optimizations like lazy loading, next-gen image replacement, and admin UI.

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class Media extends Root {

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const LOG_TAG = '📺';

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const LIB_FILE_IMG_LAZYLOAD = 'assets/js/lazyload.min.js';

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const TYPE_BATCH_RESCALE_ORI = 'batch_rescale_ori';

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/**

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* Current page buffer content.

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* @var string

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private $content;

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/**

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* WordPress uploads directory info.

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* @var array

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private $_wp_upload_dir;

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/**

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* List of VPI (viewport images) to preload in <head>.

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* @var array

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private $_vpi_preload_list = [];

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/**

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* The user-level next-gen format supported (''|webp|avif).

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* @var string

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private $_format = '';

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/**

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* The system-level chosen next-gen format (webp|avif).

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* @var string

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private $_sys_format = '';

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/**

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* Init.

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* @since 1.4

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public function __construct() {

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self::debug2( 'init' );

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$this->_wp_upload_dir = wp_upload_dir();

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if ( $this->conf( Base::O_IMG_OPTM_WEBP ) ) {

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$this->_sys_format = 'webp';

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$this->_format = 'webp';

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if ( 2 === $this->conf( Base::O_IMG_OPTM_WEBP ) ) {

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$this->_sys_format = 'avif';

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$this->_format = 'avif';

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}

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if ( ! $this->_browser_support_next_gen() ) {

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$this->_format = '';

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}

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$this->_format = apply_filters( 'litespeed_next_gen_format', $this->_format );

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}

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}

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/**

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* Hooks after user init.

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* @since 7.2

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* @since 7.4 Add media replace original with scaled.

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* @return void

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public function after_user_init() {

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// Hook to attachment delete action (PR#844, Issue#841) for AJAX del compatibility.

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add_action( 'delete_attachment', [ $this, 'delete_attachment' ], 11, 2 );

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// For big images, allow to replace original with scaled image.

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if ( $this->conf( Base::O_MEDIA_AUTO_RESCALE_ORI ) ) {

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// Added priority 9 to happen before other functions added.

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add_filter( 'wp_update_attachment_metadata', [ $this, 'rescale_ori' ], 9, 2 );

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}

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}

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/**

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* Init optm features.

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* @since 3.0

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* @access public

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* @return void

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public function init() {

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if ( is_admin() ) {

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return;

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}

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// Due to ajax call doesn't send correct accept header, have to limit webp to HTML only.

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if ( $this->webp_support() ) {

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// Hook to srcset.

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if ( function_exists( 'wp_calculate_image_srcset' ) ) {

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add_filter( 'wp_calculate_image_srcset', [ $this, 'webp_srcset' ], 988 );

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}

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// Hook to mime icon

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// add_filter( 'wp_get_attachment_image_src', [ $this, 'webp_attach_img_src' ], 988 );// todo: need to check why not

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// add_filter( 'wp_get_attachment_url', [ $this, 'webp_url' ], 988 ); // disabled to avoid wp-admin display

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}

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if ( $this->conf( Base::O_MEDIA_LAZY ) && ! $this->cls( 'Metabox' )->setting( 'litespeed_no_image_lazy' ) ) {

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self::debug( 'Suppress default WP lazyload' );

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add_filter( 'wp_lazy_loading_enabled', '__return_false' );

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}

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/**

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* Replace gravatar.

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* @since 3.0

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$this->cls( 'Avatar' );

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add_filter( 'litespeed_buffer_finalize', [ $this, 'finalize' ], 4 );

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add_filter( 'litespeed_optm_html_head', [ $this, 'finalize_head' ] );

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}

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/**

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* Handle attachment create (rescale original).

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* @param array $metadata Current meta array.

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* @param int $attachment_id Attachment ID.

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* @return array Modified metadata.

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* @since 7.4

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public function rescale_ori( $metadata, $attachment_id ) {

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// Test if create and image was resized.

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if ( $metadata && isset( $metadata['original_image'], $metadata['file'] ) && false !== strpos( $metadata['file'], '-scaled' ) ) {

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// Get rescaled file name.

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$path_exploded = explode( '/', strrev( $metadata['file'] ), 2 );

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$rescaled_file_name = strrev( $path_exploded[0] );

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// Create paths for images: resized and original.

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$base_path = $this->_wp_upload_dir['basedir'] . $this->_wp_upload_dir['subdir'] . '/';

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$rescaled_path = $base_path . $rescaled_file_name;

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$new_path = $base_path . $metadata['original_image'];

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// Change array file key.

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$metadata['file'] = $this->_wp_upload_dir['subdir'] . '/' . $metadata['original_image'];

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if ( 0 === strpos( $metadata['file'], '/' ) ) {

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$metadata['file'] = substr( $metadata['file'], 1 );

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}

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// Delete array "original_image" key.

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unset( $metadata['original_image'] );

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if ( file_exists( $rescaled_path ) && file_exists( $new_path ) ) {

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// Move rescaled to original using WP_Filesystem.

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global $wp_filesystem;

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if ( ! $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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if ( $wp_filesystem ) {

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$wp_filesystem->move( $rescaled_path, $new_path, true );

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}

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// Update meta "_wp_attached_file".

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update_post_meta( $attachment_id, '_wp_attached_file', $metadata['file'] );

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}

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}

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return $metadata;

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}

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/**

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* Route media actions.

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* @since 7.7

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* @return void

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public function handler() {

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$type = Router::verify_type();

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switch ( $type ) {

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case self::TYPE_BATCH_RESCALE_ORI:

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$this->_batch_rescale_ori();

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break;

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default:

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break;

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}

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Admin::redirect();

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}

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/**

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* Batch replace all scaled images with their originals.

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* Follows the rm_bkup() pagination pattern.

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* @since 7.7

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* @access private

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private function _batch_rescale_ori() {

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global $wpdb;

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// phpcs:ignore WordPress.Security.NonceVerification.Recommended

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$offset = ! empty( $_GET['litespeed_i'] ) ? absint( wp_unslash( $_GET['litespeed_i'] ) ) : 0;

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$limit = 500;

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$count = 0;

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$img_q = "SELECT a.ID, b.meta_value

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FROM `$wpdb->posts` a

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LEFT JOIN `$wpdb->postmeta` b ON b.post_id = a.ID

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WHERE b.meta_key = '_wp_attachment_metadata'

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AND a.post_type = 'attachment'

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AND a.post_status = 'inherit'

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AND a.post_mime_type IN ('image/jpeg', 'image/png', 'image/gif')

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ORDER BY a.ID

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LIMIT %d, %d

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// phpcs:ignore WordPress.DB.DirectDatabaseQuery, WordPress.DB.PreparedSQL.NotPrepared

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$list = $wpdb->get_results( $wpdb->prepare( $img_q, [ $offset * $limit, $limit ] ) );

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foreach ( $list as $v ) {

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if ( ! $v->ID || ! $v->meta_value ) {

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continue;

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}

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// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged

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$meta_value = @maybe_unserialize( $v->meta_value );

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if ( ! is_array( $meta_value ) ) {

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continue;

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}

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if ( empty( $meta_value['original_image'] ) || empty( $meta_value['file'] ) || false === strpos( $meta_value['file'], '-scaled' ) ) {

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continue;

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}

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$attachment_id = $v->ID;

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// Extract subdirectory from metadata file path (e.g. "2024/05/photo-scaled.jpg" → "2024/05").

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$subdir = pathinfo( $meta_value['file'], PATHINFO_DIRNAME );

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// Build relative paths for rename().

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$scaled_filename = basename( $meta_value['file'] );

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$scaled_path = $subdir . '/' . $scaled_filename;

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$original_path = $subdir . '/' . $meta_value['original_image'];

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// Verify scaled file exists before proceeding

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// TODO: need to ues isfile func to allow hook from offload plugins

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$basedir = $this->_wp_upload_dir['basedir'] . '/';

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if ( ! file_exists( $basedir . $scaled_path ) ) {

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self::debug( 'Skipped: scaled file missing [pid] ' . $attachment_id );

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continue;

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}

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// Move scaled file → original file using WP_Filesystem via rename().

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$this->rename( $scaled_path, $original_path, $attachment_id );

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// Update metadata: point file to original, remove original_image key.

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$meta_value['file'] = $subdir . '/' . $meta_value['original_image'];

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unset( $meta_value['original_image'] );

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wp_update_attachment_metadata( $attachment_id, $meta_value );

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update_post_meta( $attachment_id, '_wp_attached_file', $meta_value['file'] );

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++$count;

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}

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self::debug( 'batch_rescale_ori offset=' . $offset . ' processed=' . $count );

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// Check if there are more rows to process.

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++$offset;

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// phpcs:ignore WordPress.DB.DirectDatabaseQuery, WordPress.DB.PreparedSQL.NotPrepared

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$to_be_continued = $wpdb->get_row( $wpdb->prepare( $img_q, [ $offset * $limit, 1 ] ) );

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if ( $to_be_continued ) {

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return Router::self_redirect( Router::ACTION_MEDIA, self::TYPE_BATCH_RESCALE_ORI );

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}

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Admin_Display::success( sprintf( __( 'Batch rescale completed.', 'litespeed-cache' ) ) );

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}

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/**

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* Add featured image and VPI preloads to head.

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* @param string $content Current head HTML.

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* @return string Modified head HTML.

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public function finalize_head( $content ) {

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// <link rel="preload" as="image" href="xx">

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if ( $this->_vpi_preload_list ) {

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foreach ( $this->_vpi_preload_list as $v ) {

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$content .= '<link rel="preload" as="image" href="' . esc_url( Str::trim_quotes( $v ) ) . '">';

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}

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}

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return $content;

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}

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/**

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* Adjust WP default JPG quality.

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* @since 3.0

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* @access public

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* @param int $quality Current quality.

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* @return int Adjusted quality.

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public function adjust_jpg_quality( $quality ) {

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$v = $this->conf( Base::O_IMG_OPTM_JPG_QUALITY );

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if ( $v ) {

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return $v;

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}

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return $quality;

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}

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/**

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* Register admin menu.

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* @since 1.6.3

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* @access public

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* @return void

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public function after_admin_init() {

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/**

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* JPG quality control.

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* @since 3.0

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add_filter( 'jpeg_quality', [ $this, 'adjust_jpg_quality' ] );

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add_filter( 'manage_media_columns', [ $this, 'media_row_title' ] );

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add_filter( 'manage_media_custom_column', [ $this, 'media_row_actions' ], 10, 2 );

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add_action( 'litespeed_media_row', [ $this, 'media_row_con' ] );

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}

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/**

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* Media delete action hook.

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* @since 2.4.3

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* @access public

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* @param int $post_id Post ID.

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* @return void

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public static function delete_attachment( $post_id ) {

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self::debug( 'delete_attachment [pid] ' . $post_id );

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Img_Optm::cls()->reset_row( $post_id );

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}

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/**

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* Return media file info if exists.

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* This is for remote attachment plugins.

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* @since 2.9.8

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* @access public

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* @param string $short_file_path Relative file path under uploads.

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* @param int $post_id Post ID.

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* @return array|false Array( url, md5, size ) or false.

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public function info( $short_file_path, $post_id ) {

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$short_file_path = wp_normalize_path( $short_file_path );

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$basedir = $this->_wp_upload_dir['basedir'] . '/';

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if ( 0 === strpos( $short_file_path, $basedir ) ) {

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$short_file_path = substr( $short_file_path, strlen( $basedir ) );

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}

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$real_file = $basedir . $short_file_path;

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if ( file_exists( $real_file ) ) {

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return [

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'url' => $this->_wp_upload_dir['baseurl'] . '/' . $short_file_path,

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'md5' => md5_file( $real_file ),

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'size' => filesize( $real_file ),

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];

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}

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/**

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* WP Stateless compatibility #143 https://github.com/litespeedtech/lscache_wp/issues/143

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* @since 2.9.8

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* Should return array( 'url', 'md5', 'size' ).

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$info = apply_filters( 'litespeed_media_info', [], $short_file_path, $post_id );

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if ( ! empty( $info['url'] ) && ! empty( $info['md5'] ) && ! empty( $info['size'] ) ) {

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return $info;

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}

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return false;

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}

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/**

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* Delete media file.

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* @since 2.9.8

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* @access public

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* @param string $short_file_path Relative file path under uploads.

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* @param int $post_id Post ID.

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* @return void

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public function del( $short_file_path, $post_id ) {

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$real_file = $this->_wp_upload_dir['basedir'] . '/' . $short_file_path;

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if ( file_exists( $real_file ) ) {

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wp_delete_file( $real_file );

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self::debug( 'deleted ' . $real_file );

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}

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do_action( 'litespeed_media_del', $short_file_path, $post_id );

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}

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/**

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* Rename media file.

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* @since 2.9.8

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* @access public

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* @param string $short_file_path Old relative path.

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* @param string $short_file_path_new New relative path.

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* @param int $post_id Post ID.

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* @return void

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public function rename( $short_file_path, $short_file_path_new, $post_id ) {

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$real_file = $this->_wp_upload_dir['basedir'] . '/' . $short_file_path;

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$real_file_new = $this->_wp_upload_dir['basedir'] . '/' . $short_file_path_new;

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if ( file_exists( $real_file ) ) {

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global $wp_filesystem;

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if ( ! $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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if ( $wp_filesystem ) {

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$wp_filesystem->move( $real_file, $real_file_new, true );

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}

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self::debug( 'renamed ' . $real_file . ' to ' . $real_file_new );

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}

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do_action( 'litespeed_media_rename', $short_file_path, $short_file_path_new, $post_id );

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}

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/**

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* Media Admin Menu -> Image Optimization Column Title.

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* @since 1.6.3

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* @access public

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* @param array $posts_columns Existing columns.

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* @return array Modified columns.

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public function media_row_title( $posts_columns ) {

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$posts_columns['imgoptm'] = esc_html__( 'LiteSpeed Optimization', 'litespeed-cache' );

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return $posts_columns;

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}

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/**

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* Media Admin Menu -> Image Optimization Column.

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* @since 1.6.2

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* @access public

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* @param string $column_name Current column name.

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* @param int $post_id Post ID.

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* @return void

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public function media_row_actions( $column_name, $post_id ) {

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if ( 'imgoptm' !== $column_name ) {

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return;

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}

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do_action( 'litespeed_media_row', $post_id );

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}

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/**

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* Display image optimization info in the media list row.

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* @since 3.0

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