<?php

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namespace Automattic\WooCommerce\Blocks\Utils;

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use WP_Query;

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/**

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* BlocksWpQuery query.

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*

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* Wrapper for WP Query with additional helper methods.

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* Allows query args to be set and parsed without doing running it, so that a cache can be used.

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*

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* @deprecated 2.5.0

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*/

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class BlocksWpQuery extends WP_Query {

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/**

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* Constructor.

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*

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* Sets up the WordPress query, if parameter is not empty.

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*

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* Unlike the constructor in WP_Query, this does not RUN the query.

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*

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* @param string|array $query URL query string or array of vars.

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*/

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public function __construct( $query = '' ) {

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if ( ! empty( $query ) ) {

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$this->init();

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$this->query = wp_parse_args( $query );

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$this->query_vars = $this->query;

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$this->parse_query_vars();

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}

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}

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/**

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* Get cached posts, if a cache exists.

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*

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* A hash is generated using the array of query_vars. If doing custom queries via filters such as posts_where

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* (where the SQL query is manipulated directly) you can still ensure there is a unique hash by injecting custom

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* query vars via the parse_query filter. For example:

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*

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* add_filter( 'parse_query', function( $wp_query ) {

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* $wp_query->query_vars['my_custom_query_var'] = true;

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* } );

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*

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* Doing so won't have any negative effect on the query itself, and it will cause the hash to change.

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*

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* @param string $transient_version Transient version to allow for invalidation.

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* @return WP_Post[]|int[] Array of post objects or post IDs.

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*/

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public function get_cached_posts( $transient_version = '' ) {

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$hash = md5( wp_json_encode( $this->query_vars ) );

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$transient_name = 'wc_blocks_query_' . $hash;

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$transient_value = get_transient( $transient_name );

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if ( isset( $transient_value, $transient_value['version'], $transient_value['value'] ) && $transient_value['version'] === $transient_version ) {

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return $transient_value['value'];

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}

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$results = $this->get_posts();

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set_transient(

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$transient_name,

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array(

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'version' => $transient_version,

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'value' => $results,

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),

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DAY_IN_SECONDS * 30

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);

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return $results;

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}

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}

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