<?php

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namespace Automattic\WooCommerce\Blocks\Patterns;

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use WP_Error;

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/**

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* PatternsToolkit class.

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*

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* @internal

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*/

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class PTKClient {

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/**

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* The Patterns Toolkit API URL

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*/

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const PATTERNS_TOOLKIT_URL = 'https://public-api.wordpress.com/rest/v1/ptk/patterns/';

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/**

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* The schema for the patterns toolkit.

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*

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* @var array

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*/

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private $schema;

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/**

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* Constructor.

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*/

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public function __construct() {

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$this->schema = [

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'type' => 'array',

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'items' => [

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'type' => 'object',

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'properties' => [

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'ID' => [

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'type' => 'integer',

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'required' => true,

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],

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'site_id' => [

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'type' => 'integer',

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'required' => true,

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],

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'title' => [

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'type' => 'string',

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'required' => true,

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],

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'name' => [

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'type' => 'string',

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'required' => true,

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],

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'html' => [

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'type' => 'string',

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'required' => true,

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],

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'categories' => [

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'type' => 'object',

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'additionalProperties' => [

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'type' => 'object',

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'properties' => [

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'slug' => [

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'type' => 'string',

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'required' => true,

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],

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'title' => [

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'type' => 'string',

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'required' => true,

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],

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'description' => [

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'type' => 'string',

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'required' => true,

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],

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],

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],

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],

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],

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],

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];

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}

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/**

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* Fetch the WooCommerce patterns from the Patterns Toolkit (PTK) API.

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*

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* @param array $options Options for fetching patterns.

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* @return array|WP_Error

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*/

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public function fetch_patterns( array $options = array() ) {

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$locale = get_user_locale();

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$lang = preg_replace( '/(_.*)$/', '', $locale );

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$ptk_url = self::PATTERNS_TOOLKIT_URL . $lang;

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if ( isset( $options['site'] ) ) {

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$ptk_url = add_query_arg( 'site', $options['site'], $ptk_url );

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}

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if ( isset( $options['categories'] ) ) {

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$ptk_url = add_query_arg( 'categories', implode( ',', $options['categories'] ), $ptk_url );

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}

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if ( isset( $options['per_page'] ) ) {

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$ptk_url = add_query_arg( 'per_page', $options['per_page'], $ptk_url );

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}

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$patterns = wp_safe_remote_get( $ptk_url );

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if ( is_wp_error( $patterns ) || 200 !== wp_remote_retrieve_response_code( $patterns ) ) {

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return new WP_Error(

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'patterns_toolkit_api_error',

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__( 'Failed to connect with the Patterns Toolkit API: try again later.', 'woocommerce' )

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);

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}

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$body = wp_remote_retrieve_body( $patterns );

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if ( empty( $body ) ) {

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return new WP_Error(

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'patterns_toolkit_api_error',

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__( 'Empty response received from the Patterns Toolkit API.', 'woocommerce' )

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);

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}

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$decoded_body = json_decode( $body, true );

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$is_pattern_payload_valid = $this->is_valid_schema( $decoded_body );

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if ( ! $is_pattern_payload_valid ) {

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return new WP_Error(

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'patterns_toolkit_api_error',

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__( 'Wrong response received from the Patterns Toolkit API: try again later.', 'woocommerce' )

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);

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}

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return $decoded_body;

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}

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/**

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* Validate the patterns toolkit patterns.

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*

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* @param array $patterns The patterns to validate.

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* @return bool

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*/

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public function is_valid_schema( $patterns ) {

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$is_pattern_payload_valid = rest_validate_value_from_schema( $patterns, $this->schema );

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return ! is_wp_error( $is_pattern_payload_valid );

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}

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}

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