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/**
 * 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' ), 3000 );
		add_action( 'w3tc_network_dashboard_setup', array( $this, 'wp_dashboard_setup' ), 3000 );
		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' =&gt; array(
					'pagespeed_widget_data_error' =&gt; __( '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',
			'&lt;div class=&quot;w3tc-widget-pagespeed-logo&quot;&gt;&lt;/div&gt;' .
				'&lt;div class=&quot;w3tc-widget-text&quot;&gt;' . esc_html__( 'PageSpeed Report', 'w3-total-cache' ) . '&lt;/div&gt;',
			array( $this, 'widget_pagespeed' ),
			Util_Ui::admin_url( 'admin.php?page=w3tc_general#google_page_speed' ),
			'normal'
		);
	}

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

		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 ) &amp;&amp; isset( $cache['time'] ) &amp;&amp; $cache['time'] &gt;= time() - Util_PageSpeed::get_cache_life() ) {
				$api_response = $cache;
			}
		}

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

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

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

			if ( ! $api_response ) {
				$api_response_error = array(
					'error' =&gt; '&lt;p&gt;&lt;strong&gt;' . esc_html__( 'API request failed!', 'w3-total-cache' ) . '&lt;/strong&gt;&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Analyze URL : ', 'w3-total-cache' ) . $home_url . '&lt;/p&gt;',
				);
				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' =&gt; '&lt;p&gt;&lt;strong&gt;' . esc_html__( 'API request error!', 'w3-total-cache' ) . '&lt;/strong&gt;&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Analyze URL : ', 'w3-total-cache' ) . $home_url . '&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Response Code : ', 'w3-total-cache' ) . $error_code . '&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Response Message : ', 'w3-total-cache' ) . $error_message . '&lt;/p&gt;',
				);
				delete_option( 'w3tc_pagespeed_data_' . $home_url );
			} elseif ( ! empty( $api_response['mobile']['error'] ) &amp;&amp; ! 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' =&gt; '&lt;p&gt;&lt;strong&gt;' . esc_html__( 'API request error!', 'w3-total-cache' ) . '&lt;/strong&gt;&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Analyze URL : ', 'w3-total-cache' ) . $home_url . '&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Mobile response Code : ', 'w3-total-cache' ) . $mobile_error_code . '&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Mobile response Message : ', 'w3-total-cache' ) . $mobile_error_message . '&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Desktop response Code : ', 'w3-total-cache' ) . $desktop_error_code . '&lt;/p&gt;
						&lt;p&gt;' . esc_html__( 'Desktop response Message : ', 'w3-total-cache' ) . $desktop_error_message . '&lt;/p&gt;',
				);
				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 ), Util_PageSpeed::get_cache_life() );
			}
		}

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

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