wpcom_elasticsearch_query_args example nested boolean OR filter

filter_wpcom_elasticsearch_query_args.php

<?php
/**
 * ES Query args filter
 */
add_filter( 'wpcom_elasticsearch_query_args', function( $args, $query ) {
		// Modify sort query
		$args['sort'] = array(
			array(
				'modified' => array( "order" => 'desc' ),
			),
			array(
				"_score" => array( "order" => 'desc' ) ),
		);

		// Account for guest authors, boost the field 5 times, to ensure more results on first page of search if search term is authors name
		$args['query']['multi_match']['fields'][] = "taxonomy.author.name^5";

		// Fine tune 'fields' arg
		$args['query']['multi_match']['fields'] = array_map( function( $e ) {
				switch ( $e ) {
				case 'title':
					// Boost title
					$e = 'title^5';
					break;
				case 'author':
					$e = 'author^5';
				default:
				}
				return $e;
			}, $args['query']['multi_match']['fields'] );

		/**
		 * Replace default AND filter with boolean nested OR
		 */
		$args['filter'] = array( "or" =>
			/**
			 * Include all posts no older than 5 years if they don't have ooyala shortcode
			 */
			array(
				array( "and" => array(
					array(
						"terms" => array( "post_type" => array( "post", "page" ) )
					),
					array(
						"range" => array( "date" => array( "gte" => strtotime( "-5 years" ) ) )
					),
					array(
						"term" => array( "shortcode.ooyala.count" => 0 )
					)
				)
			),

			/**
			 * Include posts that are not older than 1 year if a post contains at least one ooyala shortcode
			 */
			array( "and" => array(
					array(
						"terms" => array( "post_type" => array( "post", "page" ) )
					),
					array(
						"range" => array( "date" => array( "gte" => strtotime( "-12 months" ) ) )
					),
					array(
						"range" => array( "shortcode.ooyala.count" => array( "gte" => 1 ) )
					),
				),
			),
			// Any other all clauses should go here

		) // End of OR filter
	);

		return $args;
	}, 10, 2 );
// End of ElasticSearch integration