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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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/**

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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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* 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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* @param int $post_id Attachment post ID.

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* @return void

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public function media_row_con( $post_id ) {

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$att_info = wp_get_attachment_metadata( $post_id );

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if ( empty( $att_info['file'] ) ) {

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return;

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}

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$short_path = $att_info['file'];

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$size_meta = get_post_meta( $post_id, Img_Optm::DB_SIZE, true );

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echo '';

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// Original image info.

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if ( $size_meta && ! empty( $size_meta['ori_saved'] ) ) {

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$percent = (int) ceil( ( (int) $size_meta['ori_saved'] * 100 ) / max( 1, (int) $size_meta['ori_total'] ) );

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$extension = pathinfo( $short_path, PATHINFO_EXTENSION );

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$bk_file = substr( $short_path, 0, -strlen( $extension ) ) . 'bk.' . $extension;

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$bk_optm_file = substr( $short_path, 0, -strlen( $extension ) ) . 'bk.optm.' . $extension;

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$link = Utility::build_url( Router::ACTION_IMG_OPTM, 'orig' . $post_id );

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$desc = false;

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$cls = '';

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if ( $this->info( $bk_file, $post_id ) ) {

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$curr_status = esc_html__( '(optm)', 'litespeed-cache' );

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$desc = esc_attr__( 'Currently using optimized version of file.', 'litespeed-cache' ) . '
' . esc_attr__( 'Click to switch to original (unoptimized) version.', 'litespeed-cache' );

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} elseif ( $this->info( $bk_optm_file, $post_id ) ) {

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$cls .= ' litespeed-warning';

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$curr_status = esc_html__( '(non-optm)', 'litespeed-cache' );

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$desc = esc_attr__( 'Currently using original (unoptimized) version of file.', 'litespeed-cache' ) . '
' . esc_attr__( 'Click to switch to optimized version.', 'litespeed-cache' );

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}

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echo wp_kses_post(

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GUI::pie_tiny(

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$percent,

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24,

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sprintf(

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esc_html__( 'Original file reduced by %1$s (%2$s)', 'litespeed-cache' ),

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$percent . '%',

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Utility::real_size( $size_meta['ori_saved'] )

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'left'

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)

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);

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printf(

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esc_html__( 'Orig saved %s', 'litespeed-cache' ),

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(int) $percent . '%'

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);

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if ( $desc ) {

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printf(

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' <a href="%1$s" class="litespeed-media-href %2$s" data-balloon-pos="left" data-balloon-break aria-label="%3$s">%4$s</a>',

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esc_url( $link ),

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esc_attr( $cls ),

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wp_kses_post( $desc ),

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esc_html( $curr_status )

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);

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} else {

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printf(

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' %2$s',

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esc_attr__( 'Using optimized version of file. ', 'litespeed-cache' ) . '
' . esc_attr__( 'No backup of original file exists.', 'litespeed-cache' ),

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esc_html__( '(optm)', 'litespeed-cache' )

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);

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}

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} elseif ( $size_meta && 0 === (int) $size_meta['ori_saved'] ) {

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echo wp_kses_post( GUI::pie_tiny( 0, 24, esc_html__( 'Congratulation! Your file was already optimized', 'litespeed-cache' ), 'left' ) );

[457] Fix | Delete

printf(

[458] Fix | Delete

esc_html__( 'Orig %s', 'litespeed-cache' ),

[459] Fix | Delete

'' . esc_html__( '(no savings)', 'litespeed-cache' ) . ''

[460] Fix | Delete

);

[461] Fix | Delete

} else {

[462] Fix | Delete

echo esc_html__( 'Orig', 'litespeed-cache' ) . '—';

[463] Fix | Delete

}

[464] Fix | Delete

echo '';

[465] Fix | Delete

[466] Fix | Delete

echo '';

[467] Fix | Delete

// WebP/AVIF info.

[468] Fix | Delete

if ( $size_meta && $this->webp_support( true ) && ! empty( $size_meta[ $this->_sys_format . '_saved' ] ) ) {

[469] Fix | Delete

$is_avif = 'avif' === $this->_sys_format;

[470] Fix | Delete

$size_meta_saved = $size_meta[ $this->_sys_format . '_saved' ];

[471] Fix | Delete

$size_meta_total = $size_meta[ $this->_sys_format . '_total' ];

[472] Fix | Delete

[473] Fix | Delete

$percent = ceil( ( $size_meta_saved * 100 ) / max( 1, $size_meta_total ) );

[474] Fix | Delete

[475] Fix | Delete

$link = Utility::build_url( Router::ACTION_IMG_OPTM, $this->_sys_format . $post_id );

[476] Fix | Delete

$desc = false;

[477] Fix | Delete

[478] Fix | Delete

$cls = '';

[479] Fix | Delete

[480] Fix | Delete

if ( $this->info( $short_path . '.' . $this->_sys_format, $post_id ) ) {

[481] Fix | Delete

$curr_status = esc_html__( '(optm)', 'litespeed-cache' );

[482] Fix | Delete

$desc = $is_avif

[483] Fix | Delete

? esc_attr__( 'Currently using optimized version of AVIF file.', 'litespeed-cache' )

[484] Fix | Delete

: esc_attr__( 'Currently using optimized version of WebP file.', 'litespeed-cache' );

[485] Fix | Delete

$desc .= '
' . esc_attr__( 'Click to switch to original (unoptimized) version.', 'litespeed-cache' );

[486] Fix | Delete

} elseif ( $this->info( $short_path . '.optm.' . $this->_sys_format, $post_id ) ) {

[487] Fix | Delete

$cls .= ' litespeed-warning';

[488] Fix | Delete

$curr_status = esc_html__( '(non-optm)', 'litespeed-cache' );

[489] Fix | Delete

$desc = $is_avif

[490] Fix | Delete

? esc_attr__( 'Currently using original (unoptimized) version of AVIF file.', 'litespeed-cache' )

[491] Fix | Delete

: esc_attr__( 'Currently using original (unoptimized) version of WebP file.', 'litespeed-cache' );

[492] Fix | Delete

$desc .= '
' . esc_attr__( 'Click to switch to optimized version.', 'litespeed-cache' );

[493] Fix | Delete

}

[494] Fix | Delete

[495] Fix | Delete

echo wp_kses_post(

[496] Fix | Delete

GUI::pie_tiny(

[497] Fix | Delete

$percent,

[498] Fix | Delete

24,

[499] Fix | Delete

12 3