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wp-content/plugins/jetpack-boost/app/modules/optimizations/image-cdn/class-quality-settings.php

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+<?php
+
+namespace Automattic\Jetpack_Boost\Modules\Optimizations\Image_CDN;
+
+use Automattic\Jetpack\Schema\Schema;
+use Automattic\Jetpack\WP_JS_Data_Sync\Data_Sync;
+use Automattic\Jetpack_Boost\Contracts\Changes_Output_After_Activation;
+use Automattic\Jetpack_Boost\Contracts\Has_Data_Sync;
+use Automattic\Jetpack_Boost\Contracts\Is_Always_On;
+use Automattic\Jetpack_Boost\Contracts\Sub_Feature;
+use Automattic\Jetpack_Boost\Lib\Premium_Features;
+
+class Quality_Settings implements Sub_Feature, Is_Always_On, Has_Data_Sync, Changes_Output_After_Activation {
+
+	public function setup() {
+		add_filter( 'jetpack_photon_pre_args', array( $this, 'add_quality_args' ), 10, 2 );
+	}
+
+	public static function get_slug() {
+		return 'image_cdn_quality';
+	}
+
+	public static function is_available() {
+		return Premium_Features::has_feature( Premium_Features::IMAGE_CDN_QUALITY );
+	}
+
+	public function register_data_sync( Data_Sync $instance ) {
+		$image_cdn_quality_schema = Schema::as_assoc_array(
+			array(
+				'jpg'  => Schema::as_assoc_array(
+					array(
+						'quality'  => Schema::as_number(),
+						'lossless' => Schema::as_boolean(),
+					)
+				),
+				'png'  => Schema::as_assoc_array(
+					array(
+						'quality'  => Schema::as_number(),
+						'lossless' => Schema::as_boolean(),
+					)
+				),
+				'webp' => Schema::as_assoc_array(
+					array(
+						'quality'  => Schema::as_number(),
+						'lossless' => Schema::as_boolean(),
+					)
+				),
+			)
+		)->fallback(
+			array(
+				'jpg'  => array(
+					'quality'  => 89,
+					'lossless' => false,
+				),
+				'png'  => array(
+					'quality'  => 80,
+					'lossless' => false,
+				),
+				'webp' => array(
+					'quality'  => 80,
+					'lossless' => false,
+				),
+			)
+		);
+
+		$instance->register( 'image_cdn_quality', $image_cdn_quality_schema );
+	}
+
+	public static function get_change_output_action_names() {
+		return array( 'update_option_' . JETPACK_BOOST_DATASYNC_NAMESPACE . '_image_cdn_quality' );
+	}
+
+	/**
+	 * Add quality arg to existing photon args.
+	 *
+	 * @param array $args - Existing photon args.
+	 *
+	 * @return mixed
+	 */
+	public function add_quality_args( $args, $image_url ) {
+		$quality = $this->get_quality_for_image( $image_url );
+
+		if ( $quality !== null ) {
+			$args['quality'] = $quality;
+		}
+
+		return $args;
+	}
+
+	/**
+	 * Get the quality for an image based on the extension.
+	 */
+	private function get_quality_for_image( $image_url ) {
+		static $quality_cache = array();
+
+		// Extract the file extension from the URL
+		$file_extension = strtolower( pathinfo( $image_url, PATHINFO_EXTENSION ) );
+
+		static $extension_to_type = array(
+			'jpg'  => 'jpg',
+			'jpeg' => 'jpg',
+			'webp' => 'webp',
+			'png'  => 'png',
+		);
+
+		if ( ! isset( $extension_to_type[ $file_extension ] ) ) {
+			return null;
+		}
+
+		$type = $extension_to_type[ $file_extension ];
+
+		if ( ! isset( $quality_cache[ $type ] ) ) {
+			$quality_cache[ $type ] = $this->get_quality_for_type( $type );
+		}
+
+		return $quality_cache[ $type ];
+	}
+
+	private function get_quality_for_type( $image_type ) {
+		$quality_settings = jetpack_boost_ds_get( 'image_cdn_quality' );
+
+		if ( ! isset( $quality_settings[ $image_type ] ) ) {
+			return null;
+		}
+
+		// Passing 100 to photon will result in a lossless image
+		return $quality_settings[ $image_type ]['lossless'] ? 100 : $quality_settings[ $image_type ]['quality'];
+	}
+
+	public static function get_parent_features(): array {
+		return array(
+			Image_CDN::class,
+		);
+	}
+}