[FEATURE] Support greaterThan and lessThan for range filters

A range filter cannot be easily used in Eel expressions since the
TypoScript parser does not allow double nested curly braces for
now. The two new query builder methods expose a high-level interface
for doing that.

Author: hlubek

Classes/Flowpack/ElasticSearch/ContentRepositoryAdaptor/Eel/ElasticSearchQueryBuilder.php

@@ -241,6 +241,28 @@ public function exactMatch($propertyName, $propertyValue) {
 		return $this->queryFilter('term', array($propertyName => $propertyValue));
 	}
 
+	/**
+	 * add a range filter (gt) for the given property
+	 *
+	 * @param string $propertyName
+	 * @param mixed $propertyValue
+	 * @return ElasticSearchQueryBuilder
+	 */
+	public function greaterThan($propertyName, $propertyValue) {
+		return $this->queryFilter('range', array($propertyName => array('gt' => $propertyValue)));
+	}
+
+	/**
+	 * add a range filter (lt) for the given property
+	 *
+	 * @param string $propertyName
+	 * @param mixed $propertyValue
+	 * @return ElasticSearchQueryBuilder
+	 */
+	public function lessThan($propertyName, $propertyValue) {
+		return $this->queryFilter('range', array($propertyName => array('lt' => $propertyValue)));
+	}
+
 	/**
 	 * LOW-LEVEL API
 	 */