Add replace original with scaled

Text review

Author: timotei-litespeed

src/base.cls.php

@@ -226,6 +226,7 @@ class Base extends Root {
 	const O_IMG_OPTM_CRON                = 'img_optm-cron'; // @Deprecated since v7.0 TODO: remove after v7.5
 	const O_IMG_OPTM_ORI                 = 'img_optm-ori';
 	const O_IMG_OPTM_RM_BKUP             = 'img_optm-rm_bkup';
+	const O_IMG_OPTM_REP_W_SCALED        = 'img_optm-replace_w_scaled';
 	const O_IMG_OPTM_WEBP                = 'img_optm-webp';
 	const O_IMG_OPTM_LOSSLESS            = 'img_optm-lossless';
 	const O_IMG_OPTM_EXIF                = 'img_optm-exif';
@@ -505,6 +506,7 @@ class Base extends Root {
 		self::O_IMG_OPTM_AUTO => false,
 		self::O_IMG_OPTM_ORI => false,
 		self::O_IMG_OPTM_RM_BKUP => false,
+		self::O_IMG_OPTM_REP_W_SCALED => false,
 		self::O_IMG_OPTM_WEBP => false,
 		self::O_IMG_OPTM_LOSSLESS => false,
 		self::O_IMG_OPTM_EXIF => false,

src/img-optm.cls.php

@@ -2192,4 +2192,47 @@ public function handler() {
 
 		Admin::redirect();
 	}
+	
+	/**
+	 * Replace original with scaled image.
+	 *
+	 * @since  7.4
+	 * @param array $meta_value Current meta array.
+	 * @param int $post_id Attachment ID.
+	 * @param string $context Can be "create" or "update".
+	 * @return array $meta_value
+	 * @access public
+	 */
+	public function replace_original_with_scaled( $meta_value, $post_id, $context ) {
+		// Test if create and image was resized.
+		if( "create" === $context && isset($meta_value['original_image']) && isset($meta_value['file']) && false !== strstr($meta_value['file'], '-scaled')){
+			$media_path = wp_upload_dir();
+			// Get rescaled file name.
+			$path_exploded = explode( DIRECTORY_SEPARATOR, strrev($meta_value['file']), 2 );
+			$rescaled_file_name = strrev($path_exploded[0]);
+			
+			// Create paths for images: resized and original.
+			$rescaled_path = $media_path['basedir'] . $media_path['subdir'] . DIRECTORY_SEPARATOR . $rescaled_file_name;
+			$new_path = $media_path['basedir'] . $media_path['subdir'] . DIRECTORY_SEPARATOR . $meta_value['original_image'];
+
+			if( is_file( $rescaled_path ) && is_file( $rescaled_path ) ){
+				// Move rescaled to original.
+				rename( $rescaled_path, $new_path );
+
+				// Change array file key.
+				$meta_value['file'] = $media_path['subdir'] . DIRECTORY_SEPARATOR . $meta_value['original_image'];
+				if( 0 === strpos( $meta_value['file'], DIRECTORY_SEPARATOR ) ){
+					$meta_value['file'] = substr( $meta_value['file'], 1 );
+				}
+
+				// Delete array "original_image" key.
+				unset($meta_value['original_image']);
+
+				// Update meta "_wp_attached_file".
+				update_post_meta( $post_id, '_wp_attached_file', $meta_value['file'] );
+			}
+		}
+
+		return $meta_value;
+	}
 }

src/lang.cls.php

@@ -206,6 +206,7 @@ public static function title( $id ) {
 			self::O_IMG_OPTM_AUTO => __('Auto Request Cron', 'litespeed-cache'),
 			self::O_IMG_OPTM_ORI => __('Optimize Original Images', 'litespeed-cache'),
 			self::O_IMG_OPTM_RM_BKUP => __('Remove Original Backups', 'litespeed-cache'),
+			self::O_IMG_OPTM_REP_W_SCALED => __('Replace Original with Scaled', 'litespeed-cache'),
 			self::O_IMG_OPTM_WEBP => __('Next-Gen Image Format', 'litespeed-cache'),
 			self::O_IMG_OPTM_LOSSLESS => __('Optimize Losslessly', 'litespeed-cache'),
 			self::O_IMG_OPTM_EXIF => __('Preserve EXIF/XMP data', 'litespeed-cache'),

src/media.cls.php

@@ -52,11 +52,18 @@ public function __construct() {
 	/**
 	 * Hooks after user init
 	 *
-	 * @since  7.2
+	 * @since 7.2
+	 * @since 7.4 Add media replace original with scaled.
 	 */
 	public function after_user_init() {
 		// Hook to attachment delete action (PR#844, Issue#841) for AJAX del compatibility
 		add_action('delete_attachment', array( $this, 'delete_attachment' ), 11, 2);
+
+		// For big images, allow to replace original with scaled image.
+		if( $this->conf(Base::O_IMG_OPTM_REP_W_SCALED) ){
+			// Added priority 9 to happen before other functions added.
+			add_filter('wp_generate_attachment_metadata', array( $this, 'replace_original_with_scaled' ), 9, 3);
+		}
 	}
 
 	/**
@@ -98,6 +105,19 @@ public function init() {
 		add_filter('litespeed_optm_html_head', array( $this, 'finalize_head' ));
 	}
 
+	/**
+	 * Handle attachment create
+	 * 
+	 * @param array $metadata Current meta array.
+	 * @param int $attachment_id Attachment ID.
+	 * @param string $context Can be "create" or "update".
+	 * @return array $metadata
+	 * @since  7.4
+	 */
+	public function replace_original_with_scaled( $metadata, $attachment_id, $context ) {
+		return $this->cls('Img_Optm')->replace_original_with_scaled( $metadata, $attachment_id, $context );
+	}
+
 	/**
 	 * Add featured image to head
 	 */

tpl/img_optm/settings.tpl.php

@@ -12,6 +12,8 @@
 
 defined( 'WPINC' ) || exit;
 
+$scaled_size = apply_filters( 'big_image_size_threshold', 2560 ) . 'px';
+
 $this->form_action();
 ?>
 
@@ -69,6 +71,39 @@
 			</td>
 		</tr>
 
+		<tr>
+			<th>
+				<?php $option_id = Base::O_IMG_OPTM_REP_W_SCALED; ?>
+				<?php $this->title( $option_id ); ?>
+			</th>
+			<td>
+				<?php $this->build_switch( $option_id ); ?>
+				<div class="litespeed-desc">
+					<?php esc_html_e( 'Automatically replace large images with scaled versions.', 'litespeed-cache' ); ?>
+					<br />
+					<?php echo wp_kses_post( __( 'Scaled size and threshold is: %s.', 'litespeed-cache' ), '<code>' . $scaled_size . '</code>'); ?>
+					<br />
+					<span class="litespeed-success">
+						<?php
+						printf(
+							esc_html__( 'API: Filter %s available to change threshold.', 'litespeed-cache' ),
+							'<code>big_image_size_threshold</code>'
+						);
+						?>
+						<a href="https://developer.wordpress.org/reference/hooks/big_image_size_threshold/" target="_blank" class="litespeed-learn-more">
+							<?php esc_html_e('Learn More', 'litespeed-cache'); ?>
+						</a>
+					</span>
+
+					<br />
+					<font class="litespeed-danger">
+						🚨
+						<?php esc_html_e( 'This is irreversible.', 'litespeed-cache' ); ?>
+					</font>
+				</div>
+			</td>
+		</tr>
+
 		<tr>
 			<th>
 				<?php $option_id = Base::O_IMG_OPTM_LOSSLESS; ?>