add wp-rocket

wp-content/plugins/wp-rocket/inc/classes/Buffer/class-optimization.php

@@ -0,0 +1,110 @@
+<?php
+namespace WP_Rocket\Buffer;
+
+/**
+ * Handle page optimizations.
+ *
+ * @since  3.3
+ * @author Grégory Viguier
+ */
+class Optimization extends Abstract_Buffer {
+
+	/**
+	 * Process identifier used by the logger.
+	 *
+	 * @var    string
+	 * @since  3.3
+	 * @access protected
+	 * @author Grégory Viguier
+	 */
+	protected $process_id = 'optimization process';
+
+	/**
+	 * Tests instance
+	 *
+	 * @var Tests
+	 */
+	protected $tests;
+
+	/**
+	 * Constructor.
+	 *
+	 * @since  3.3
+	 * @access public
+	 * @author Grégory Viguier
+	 *
+	 * @param Tests $tests Tests instance.
+	 */
+	public function __construct( Tests $tests ) {
+		parent::__construct( $tests );
+
+		$this->log( 'OPTIMIZATION PROCESS STARTED.', [], 'info' );
+	}
+
+	/** ----------------------------------------------------------------------------------------- */
+	/** CACHE =================================================================================== */
+	/** ----------------------------------------------------------------------------------------- */
+
+	/**
+	 * Do preliminary tests and maybe launch the buffer process.
+	 *
+	 * @since  3.3
+	 * @access public
+	 * @author Grégory Viguier
+	 */
+	public function maybe_init_process() {
+		if ( ! $this->tests->can_init_process() ) {
+			$this->log_last_test_error();
+			return;
+		}
+
+		ob_start( [ $this, 'maybe_process_buffer' ] );
+	}
+
+	/**
+	 * Maybe optimize the page content.
+	 *
+	 * @since  3.3
+	 * @access public
+	 * @author Grégory Viguier
+	 *
+	 * @param  string $buffer The buffer content.
+	 * @return string         The buffered content.
+	 */
+	public function maybe_process_buffer( $buffer ) {
+		/**
+		 * Triggered before WP Rocket starts the optimization process.
+		 *
+		 * @since  3.4.2
+		 * @author Soponar Cristina
+		 *
+		 * @param string $buffer HTML content.
+		 */
+		do_action( 'rocket_before_maybe_process_buffer', $buffer );
+
+		if ( ! $this->is_html( $buffer ) ) {
+			return $buffer;
+		}
+
+		if ( ! $this->tests->can_process_buffer( $buffer ) ) {
+			$this->log_last_test_error();
+			return $buffer;
+		}
+
+		/**
+		 * This hook is used for:
+		 * - Async CSS files
+		 * - Defer JavaScript files
+		 * - Minify/Combine HTML/CSS/JavaScript
+		 * - CDN
+		 * - LazyLoad
+		 *
+		 * @param string $buffer The page content.
+		 */
+		$buffer = (string) apply_filters( 'rocket_buffer', $buffer );
+
+		$this->log( 'Page optimized.', [], 'info' );
+
+		return $buffer;
+	}
+}