installed plugin Easy Digital Downloads version 3.1.0.3

wp-content/plugins/easy-digital-downloads/includes/compat/class-discount-query.php

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+<?php
+/**
+ * Discount Query Class.
+ *
+ * @package     EDD
+ * @subpackage  Database\Queries
+ * @copyright   Copyright (c) 2018, Easy Digital Downloads, LLC
+ * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License
+ * @since       3.0
+ */
+namespace EDD\Compat;
+
+use EDD\Database\Queries as Queries;
+
+// Exit if accessed directly
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Class used for querying discounts.
+ *
+ * @since 3.0
+ *
+ * @see \EDD\Database\Queries\Adjustment::__construct() for accepted arguments.
+ */
+class Discount_Query extends Queries\Adjustment {
+
+	/**
+	 * Callback function for turning IDs into objects
+	 *
+	 * @since 3.0
+	 * @access protected
+	 * @var mixed
+	 */
+	protected $item_shape = 'EDD_Discount';
+
+	/**
+	 * Swap out types in a query.
+	 *
+	 * @since 3.0
+	 *
+	 * @param array $query Array of query arguments
+	 * @return array
+	 */
+	public function query( $query = array() ) {
+		return parent::query( $this->swap_types( $query ) );
+	}
+
+	/**
+	 * Swap out types in an item.
+	 *
+	 * @since 3.0
+	 *
+	 * @param array $item Array of item arguments
+	 * @return array
+	 */
+	public function filter_item( $item = array() ) {
+		return parent::filter_item( $this->swap_types( $item ) );
+	}
+
+	/**
+	 * Swap out the type arguments.
+	 *
+	 * @since 3.0
+	 *
+	 * @param array $args
+	 * @return array
+	 */
+	private function swap_types( $args = array() ) {
+
+		// Switch `type` to `amount_type`
+		if ( empty( $args['amount_type'] ) && ! empty( $args['type'] ) ) {
+			$args['amount_type'] = $args['type'];
+		}
+
+		// Force `type` to `discount`
+		$args['type'] = 'discount';
+
+		// Return swapped arguments
+		return $args;
+	}
+}