Edit - PageSpeed_Widget.php

Edit: PageSpeed_Widget.php

<?php
/**
 * File: PageSpeed_Widget.php
 *
 * Controller for PageSpeed dashboard widget setup, display, and AJAX handler.
 *
 * @since 2.3.0 Update to utilize OAuth2.0 and overhaul of feature.
 *
 * @package W3TC
 */

namespace W3TC;

/**
 * Google PageSpeed dashboard widget.
 *
 * @since 2.3.0
 */
class PageSpeed_Widget {
	/**
	 * Run PageSpeed widget.
	 *
	 * @since 2.3.0
	 *
	 * @return void
	 */
	public function run() {
		add_action( 'w3tc_widget_setup', array( $this, 'wp_dashboard_setup' ), 500 );
		add_action( 'w3tc_network_dashboard_setup', array( $this, 'wp_dashboard_setup' ), 500 );
		add_action( 'w3tc_ajax_pagespeed_widgetdata', array( $this, 'w3tc_ajax_pagespeed_widgetdata' ) );
	}

/**
	 * Initialize PageSpeed widget scripts/styles.
	 *
	 * @since 2.3.0
	 *
	 * @return void
	 */
	public static function admin_print_scripts_w3tc_pagespeed_widget() {
		wp_register_script(
			'w3tc-widget-pagespeed',
			esc_url( plugins_url( 'PageSpeed_Widget_View.js', W3TC_FILE ) ),
			array(),
			W3TC_VERSION,
			'true'
		);
		wp_localize_script(
			'w3tc-widget-pagespeed',
			'w3tcData',
			array(
				'lang' => array(
					'pagespeed_widget_data_error' => __( 'Error : ', 'w3-total-cache' ),
				),
			)
		);
		wp_enqueue_script( 'w3tc-widget-pagespeed' );

wp_enqueue_style(
			'w3tc-widget-pagespeed',
			esc_url( plugins_url( 'PageSpeed_Widget_View.css', W3TC_FILE ) ),
			array(),
			W3TC_VERSION
		);
	}

/**
	 * Dashboard setup action.
	 *
	 * @since 2.3.0
	 *
	 * @return void
	 */
	public function wp_dashboard_setup() {
		Util_Widget::add(
			'w3tc_pagespeed',
			'<div class="w3tc-widget-pagespeed-logo"></div>' .
				'<div class="w3tc-widget-text">' . esc_html__( 'PageSpeed Report', 'w3-total-cache' ) . '</div>',
			array( $this, 'widget_pagespeed' ),
			Util_Ui::admin_url( 'admin.php?page=w3tc_general#google_pagespeed' ),
			'normal'
		);
	}

/**
	 * PageSpeed widget.
	 *
	 * @since 2.3.0
	 *
	 * @return void
	 */
	public function widget_pagespeed() {
		$config       = Dispatcher::config();
		$access_token = $config->get_string( 'widget.pagespeed.access_token' );

if ( empty( $access_token ) ) {
			echo wp_kses(
				sprintf(
					// translators: 1 HTML a tag to W3TC settings page Google PageSpeed meta box.
					__(
						'Before you can get started using the Google PageSpeed tool, you’ll first need to authorize access. Please click %1$s.',
						'w3-total-cache'
					),
					'<a href="' . esc_url( Util_Ui::admin_url( 'admin.php?page=w3tc_general#google_pagespeed' ) ) . '" target="_blank">' . esc_html__( 'here', 'w3-total-cache' ) . '</a>'
				),
				array(
					'a' => array(
						'href' => array(),
						'target' => array(),
					),
				)
			);
			return;
		}

include W3TC_DIR . '/PageSpeed_Widget_View.php';
	}

/**
	 * PageSpeed widget AJAX fetch data.
	 *
	 * @since 2.3.0
	 *
	 * @return JSON
	 */
	public function w3tc_ajax_pagespeed_widgetdata() {
		$home_url           = get_home_url();
		$api_response       = null;
		$api_response_error = null;

if ( Util_Request::get( 'cache' ) !== 'no' ) {
			$cache = get_option( 'w3tc_pagespeed_data_' . $home_url );
			$cache = json_decode( $cache, true );
			if ( is_array( $cache ) && isset( $cache['time'] ) && $cache['time'] >= time() - Util_PageSpeed::get_cache_life() ) {
				$api_response = $cache;
			}
		}

if ( is_null( $api_response ) ) {
			$config       = Dispatcher::config();
			$access_token = ! empty( $config->get_string( 'widget.pagespeed.access_token' ) ) ? $config->get_string( 'widget.pagespeed.access_token' ) : null;

if ( empty( $access_token ) ) {
				echo wp_json_encode(
					array(
						'missing_token' => sprintf(
							// translators: 1 HTML a tag to W3TC settings page Google PageSpeed meta box.
							__(
								'Before you can get started using the Google PageSpeed tool, you’ll first need to authorize access. Please click %1$s.',
								'w3-total-cache'
							),
							'<a href="' . esc_url( Util_Ui::admin_url( 'admin.php?page=w3tc_general#google_pagespeed' ) ) . '" target="_blank">' . esc_html__( 'here', 'w3-total-cache' ) . '</a>'
						),
					)
				);
				return;
			}

$w3_pagespeed = new PageSpeed_Api( $access_token );
			$api_response = $w3_pagespeed->analyze( $home_url );

if ( ! $api_response ) {
				$api_response_error = array(
					'error' => '' . esc_html__( 'API request failed!', 'w3-total-cache' ) . '
						' . esc_html__( 'Analyze URL : ', 'w3-total-cache' ) . $home_url . '',
				);
				delete_option( 'w3tc_pagespeed_data_' . $home_url );
			} elseif ( ! empty( $api_response['error'] ) ) {
				$error_code = ! empty( $api_response['error']['code'] ) ? $api_response['error']['code'] : 'N/A';
				$error_message = ! empty( $api_response['error']['message'] ) ? $api_response['error']['message'] : 'N/A';

$api_response_error = array(
					'error' => '' . esc_html__( 'API request error!', 'w3-total-cache' ) . '
						' . esc_html__( 'Analyze URL : ', 'w3-total-cache' ) . $home_url . '
						' . esc_html__( 'Response Code : ', 'w3-total-cache' ) . $error_code . '
						' . esc_html__( 'Response Message : ', 'w3-total-cache' ) . $error_message . '',
				);
				delete_option( 'w3tc_pagespeed_data_' . $home_url );
			} elseif ( ! empty( $api_response['mobile']['error'] ) && ! empty( $api_response['desktop']['error'] ) ) {
				$mobile_error_code = ! empty( $api_response['mobile']['error']['code'] ) ? $api_response['mobile']['error']['code'] : 'N/A';
				$mobile_error_message = ! empty( $api_response['mobile']['error']['message'] ) ? $api_response['mobile']['error']['message'] : 'N/A';
				$desktop_error_code = ! empty( $api_response['desktop']['error']['code'] ) ? $api_response['desktop']['error']['code'] : 'N/A';
				$desktop_error_message = ! empty( $api_response['desktop']['error']['message'] ) ? $api_response['desktop']['error']['message'] : 'N/A';

$api_response_error = array(
					'error' => '' . esc_html__( 'API request error!', 'w3-total-cache' ) . '
						' . esc_html__( 'Analyze URL : ', 'w3-total-cache' ) . $home_url . '
						' . esc_html__( 'Mobile response Code : ', 'w3-total-cache' ) . $mobile_error_code . '
						' . esc_html__( 'Mobile response Message : ', 'w3-total-cache' ) . $mobile_error_message . '
						' . esc_html__( 'Desktop response Code : ', 'w3-total-cache' ) . $desktop_error_code . '
						' . esc_html__( 'Desktop response Message : ', 'w3-total-cache' ) . $desktop_error_message . '',
				);
				delete_option( 'w3tc_pagespeed_data_' . $home_url );
			} else {
				$api_response['time'] = time();
				$api_response['display_time'] = \current_time( 'M jS, Y g:ia', false );
				update_option( 'w3tc_pagespeed_data_' . $home_url, wp_json_encode( $api_response ), false );
			}
		}

ob_start();
		include __DIR__ . '/PageSpeed_Widget_View_FromApi.php';
		$content = ob_get_contents();
		ob_end_clean();

echo wp_json_encode(
			array(
				'w3tcps_widget'    => $content,
				'w3tcps_timestamp' => ! empty( $api_response['display_time'] ) ? $api_response['display_time'] : '',
			)
		);
	}
}

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