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<?php

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/**

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* Smush API class that handles communications with WPMU DEV API: API class

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* @since 3.0

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* @package Smush\Core\Api

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namespace Smush\Core\Api;

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use WP_Error;

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if ( ! defined( 'WPINC' ) ) {

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die;

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}

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/**

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* Class Smush_API.

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class Smush_API extends Abstract_API {

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/**

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* Endpoint name.

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* @since 3.0

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* @var string

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public $name = 'smush';

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/**

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* Endpoint version.

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* @since 3.0

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* @var string

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public $version = 'v1';

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/**

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* Check CDN status (same as verify the is_pro status).

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* @since 3.0

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* @param bool $manual If it's a manual check. Only manual on button click.

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* @return mixed|WP_Error

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public function check( $manual = false ) {

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return $this->backoff_sync( function () {

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return $this->request->get(

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"check/{$this->api_key}",

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array(

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'api_key' => $this->api_key,

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'domain' => $this->request->get_this_site(),

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)

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);

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}, $manual );

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}

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/**

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* Enable CDN for site.

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* @since 3.0

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* @param bool $manual If it's a manual check. Overwrites the exponential back off.

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* @return mixed|WP_Error

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public function enable( $manual = false ) {

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return $this->backoff_sync( function () {

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return $this->request->post(

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'cdn',

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array(

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'api_key' => $this->api_key,

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'domain' => $this->request->get_this_site(),

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)

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);

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}, $manual );

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}

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private function backoff_sync( $operation, $manual ) {

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$defaults = array(

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'time' => time(),

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'fails' => 0,

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);

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$last_run = (array) get_site_option( 'wp-smush-last_run_sync', $defaults );

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if ( ! empty( $last_run['fails'] ) ) {

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$backoff = min( pow( 5, $last_run['fails'] ), HOUR_IN_SECONDS ); // Exponential 5, 25, 125, 625, 3125, 3600 max.

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if ( $last_run['fails'] && $last_run['time'] > ( time() - $backoff ) && ! $manual ) {

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$last_run['time'] = time();

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update_site_option( 'wp-smush-last_run_sync', $last_run );

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return new WP_Error( 'api-backoff', __( '[WPMUDEV API] Skipped sync due to API error exponential backoff.', 'wp-smushit' ) );

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}

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}

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$response = call_user_func( $operation );

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$last_run['time'] = time();

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// Clear the API backoff if it's a manual scan or the API call was a success.

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if ( $manual || ( ! is_wp_error( $response ) && 200 === wp_remote_retrieve_response_code( $response ) ) ) {

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$last_run['fails'] = 0;

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} else {

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// For network errors, perform exponential backoff.

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$last_run['fails'] = $last_run['fails'] + 1;

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}

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update_site_option( 'wp-smush-last_run_sync', $last_run );

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return $response;

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}

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}

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