plugin install

wp/wp-content/plugins/gravityforms/includes/query/class-gf-query-series.php

@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * The Gravity Forms Query Series class.
+ *
+ * A list of arguments. Would have named "List" but it's a reserved keyword.
+ */
+class GF_Query_Series {
+	/**
+	 * @var array A series of values.
+	 */
+	private $_values = array();
+
+	/**
+	 * A series of expressions.
+	 *
+	 * @param mixed[] $values With a valid expression type (GF_Query_Literal, GF_Query_Column, GF_Query_Call)
+	 */
+	public function __construct( $values ) {
+		if ( is_array( $values ) ) {
+			$this->_values = array_filter( $values, array( 'GF_Query_Condition', 'is_valid_expression_type' ) );
+		}
+	}
+
+	/**
+	 * Get SQL for this.
+	 *
+	 * @param GF_Query $query     The query.
+	 * @param string           $delimiter The delimiter to stick the series values with.
+	 *
+	 * @return string The SQL.
+	 */
+	public function sql( $query, $delimiter = '' ) {
+		$values = array();
+
+		foreach( $this->_values as $value ) {
+			$values[] = $value->sql( $query );
+		}
+
+		$chunks = array_filter( $values, 'strlen' );
+
+		return implode( $delimiter, $chunks);
+	}
+
+	/**
+	 * Proxy read-only values.
+	 */
+	public function __get( $key ) {
+		switch ( $key ):
+			case 'values':
+				return $this->_values;
+		endswitch;
+	}
+}