<?php
namespace W3TC;
/**
* Google Page Speed API
*/
define( 'W3TC_PAGESPEED_API_URL', 'https://www.googleapis.com/pagespeedonline/v5/runPagespeed' );
/**
* class PageSpeed_Api
*/
class PageSpeed_Api {
/**
* API Key
*/
private $key = '';
/**
* Referrer for key restricting
*/
private $key_restrict_referrer = '';
function __construct( $api_key, $api_ref ) {
$this->key = $api_key;
$this->key_restrict_referrer = $api_ref;
}
public function analyze( $url ) {
return array(
'mobile' => $this->analyze_strategy( $url, 'mobile' ),
'desktop' => $this->analyze_strategy( $url, 'desktop' ),
'test_url' => Util_Environment::url_format(
'https://developers.google.com/speed/pagespeed/insights/',
array( 'url' => $url ) )
);
}
public function analyze_strategy( $url, $strategy ) {
$json = $this->_request( array(
'url' => $url,
'category' => 'performance',
'strategy' => $strategy
) );
if ( !$json ) {
return null;
}
$data = array();
try {
$data = json_decode( $json, true );
} catch ( \Exception $e ) {
}
return array(
'score' => $this->v( $data, array( 'lighthouseResult', 'categories', 'performance', 'score' ) ) * 100,
'metrics' => $this->v( $data, array( 'loadingExperience', 'metrics' ) )
);
}
public function get_page_score( $url ) {
$json = $this->_request( array(
'url' => $url,
'category' => 'performance',
'strategy' => 'desktop'
) );
if ( !$json ) {
return null;
}
$data = array();
try {
$data = json_decode( $json, true );
} catch ( \Exception $e ) {
}
return $this->v( $data, array( 'lighthouseResult', 'categories', 'performance', 'score' ) );
}
/**
* Make API request
*
* @param string $url
* @return string
*/
function _request( $query ) {
$request_url = Util_Environment::url_format( W3TC_PAGESPEED_API_URL,
array_merge( $query, array(
'key' => $this->key
) ) );
$response = Util_Http::get( $request_url, array(
'timeout' => 120,
'headers' => array( 'Referer' => $this->key_restrict_referrer )
) );
if ( !is_wp_error( $response ) && $response['response']['code'] == 200 ) {
return $response['body'];
}
return false;
}
function v( $data, $elements ) {
if ( empty( $elements ) ) {
return $data;
}
$key = array_shift( $elements );
if ( !isset( $data[$key] ) ) {
return null;
}
return $this->v( $data[$key], $elements );
}
}