Set up PageController and placeholder log handler class

plugins/woocommerce/src/Internal/Admin/Logging/LogHandlerFileV2.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Automattic\WooCommerce\Internal\Admin\Logging;
+
+use WC_Log_Handler_File;
+
+class LogHandlerFileV2 extends WC_Log_Handler_File {}

plugins/woocommerce/src/Internal/Admin/Logging/PageController.php

@@ -0,0 +1,134 @@
+<?php
+
+namespace Automattic\WooCommerce\Internal\Admin\Logging;
+
+use Automattic\Jetpack\Constants;
+use Automattic\WooCommerce\Internal\Admin\Logging\FileV2\{ FileController, ListTable };
+use Automattic\WooCommerce\Internal\Traits\AccessiblePrivateMethods;
+use WC_Admin_Status;
+
+/**
+ * PageController class.
+ */
+class PageController {
+
+	use AccessiblePrivateMethods;
+
+	/**
+	 * @var FileController
+	 */
+	private $file_controller;
+
+	/**
+	 * @var ListTable
+	 */
+	private $file_list_table;
+
+	/**
+	 * Initialize dependencies.
+	 *
+	 * @param FileController $file_controller
+	 * @param ListTable $file_list_table
+	 *
+	 * @return void
+	 */
+	final public function init(
+		FileController $file_controller,
+		ListTable $file_list_table
+	) {
+		$this->file_controller = $file_controller;
+		$this->file_list_table = $file_list_table;
+
+		$this->init_hooks();
+	}
+
+	/**
+	 * Add callbacks to hooks.
+	 *
+	 * @return void
+	 */
+	private function init_hooks() {
+
+	}
+
+	/**
+	 * Determine the default log handler.
+	 *
+	 * @return string
+	 */
+	public function get_default_handler() {
+		$handler = Constants::get_constant( 'WC_LOG_HANDLER' );
+
+		if ( is_null( $handler ) || ! class_exists( $handler ) ) {
+			$handler = \WC_Log_Handler_File::class;
+		}
+
+		return $handler;
+	}
+
+	/**
+	 * Render the "Logs" tab, depending on the current default log handler.
+	 *
+	 * @return void
+	 */
+	public function render() {
+		$handler = $this->get_default_handler();
+
+		switch ( $handler ) {
+			case LogHandlerFileV2::class:
+				$args = $this->get_filev2_query_params();
+				$this->render_filev2( $args );
+				break;
+			case 'WC_Log_Handler_DB':
+				WC_Admin_Status::status_logs_db();
+				break;
+			default:
+				WC_Admin_Status::status_logs_file();
+				break;
+		}
+	}
+
+	/**
+	 * Render the views for the FileV2 log handler.
+	 *
+	 * @param array $args Args for rendering the views.
+	 *
+	 * @return void
+	 */
+	private function render_filev2( array $args = array() ) {
+		$view = $args['view'] ?? '';
+
+		switch ( $view ) {
+			case 'list_files':
+			default:
+				$this->file_list_table->prepare_items();
+				$this->file_list_table->display();
+				break;
+			case 'single_file':
+				WC_Admin_Status::status_logs_file();
+				break;
+		}
+	}
+
+	/**
+	 * Get and validate URL query params for FileV2 views.
+	 *
+	 * @return array
+	 */
+	private function get_filev2_query_params() {
+		$params = filter_input_array(
+			INPUT_GET,
+			array(
+				'view' => array(
+					'filter'  => FILTER_VALIDATE_REGEXP,
+					'options' => array(
+						'regexp'  => '/^(list_files|single_file)$/',
+						'default' => 'list_files'
+					),
+				),
+			)
+		);
+
+		return $params;
+	}
+}