Merge pull request #26 from maxsakal/make-possible-filter-shipment-by…

…-category-id

Make possible filter shipments by product categories

src/ShipmentQuery.php

@@ -53,6 +53,7 @@ protected function get_default_query_vars() {
 			'order_id'          => '',
 			'parent_id'         => '',
 			'product_ids'       => '',
+			'product_category'       => '',
 			'type'              => 'simple',
 			'country'           => '',
 			'tracking_id'       => '',
@@ -195,6 +196,11 @@ protected function parse_query() {
 			$this->args['product_ids'] = array_map( 'absint', $this->args['product_ids'] );
 		}
 
+		if ( isset( $this->args['product_category'] ) ) {
+			$this->args['product_category'] = (array) $this->args['product_category'];
+			$this->args['product_category'] = array_map( 'absint', $this->args['product_category'] );
+		}
+
 		if ( isset( $this->args['tracking_id'] ) ) {
 			$this->args['tracking_id'] = sanitize_key( $this->args['tracking_id'] );
 		}
@@ -313,6 +319,15 @@ protected function prepare_query() {
 			$this->query_where .= $wpdb->prepare( " AND shipment_items.shipment_item_product_id IN ({$product_ids_placeholders})", $this->args['product_ids'] ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare
 		}
 
+		// product category
+		if ( isset( $this->args['product_category'] ) ) {
+			$product_category_placeholders = implode( ', ', array_fill( 0, count( $this->args['product_category'] ), '%d' ) );
+
+			$this->query_from  .= " JOIN {$wpdb->prefix}woocommerce_gzd_shipment_items AS shipment_items ON {$wpdb->prefix}woocommerce_gzd_shipments.shipment_id = shipment_items.shipment_id ";
+			$this->query_from  .= " JOIN {$wpdb->prefix}term_relationships AS term_relationships ON term_relationships.object_id = shipment_items.shipment_item_product_id ";
+			$this->query_where .= $wpdb->prepare( " AND term_relationships.term_taxonomy_id IN ({$product_category_placeholders})",  $this->args['product_category']); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare
+		}
+
 		// country
 		if ( isset( $this->args['country'] ) ) {
 			$this->query_where .= $wpdb->prepare( " AND shipment_country IN ('%s')", $this->args['country'] ); // phpcs:ignore WordPress.DB.PreparedSQLPlaceholders.QuotedSimplePlaceholder