1 files changed, 64 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/QueryEngine/DescriptionInterpreters/ComparatorMapper.php b/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/QueryEngine/DescriptionInterpreters/ComparatorMapper.php
new file mode 100644
index 00000000..e32ac8c2
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/QueryEngine/DescriptionInterpreters/ComparatorMapper.php
@@ -0,0 +1,64 @@
+<?php
+
+namespace SMW\SQLStore\QueryEngine\DescriptionInterpreters;
+
+use RuntimeException;
+use SMW\Query\Language\ValueDescription;
+use SMWDIUri as DIUri;
+
+/**
+ * @license GNU GPL v2+
+ * @since 2.2
+ *
+ * @author mwjames
+ */
+class ComparatorMapper {
+
+	/**
+	 * @since 2.2
+	 *
+	 * @param ValueDescription $description
+	 * @param string &$value
+	 *
+	 * @return string
+	 * @throws RuntimeException
+	 */
+	public function mapComparator( ValueDescription $description, &$value ) {
+
+		$comparatorMap = [
+			SMW_CMP_EQ   => '=',
+			SMW_CMP_LESS => '<',
+			SMW_CMP_GRTR => '>',
+			SMW_CMP_LEQ  => '<=',
+			SMW_CMP_GEQ  => '>=',
+			SMW_CMP_NEQ  => '!=',
+			SMW_CMP_LIKE => ' LIKE ',
+			SMW_CMP_PRIM_LIKE => ' LIKE ',
+			SMW_CMP_NLKE => ' NOT LIKE ',
+			SMW_CMP_PRIM_NLKE => ' NOT LIKE '
+		];
+
+		$comparator = $description->getComparator();
+
+		if ( !isset( $comparatorMap[$comparator] ) ) {
+			throw new RuntimeException( "Unsupported comparator $comparator in value description." );
+		}
+
+		if ( $comparator === SMW_CMP_LIKE || $comparator === SMW_CMP_NLKE || $comparator === SMW_CMP_PRIM_LIKE || $comparator === SMW_CMP_PRIM_NLKE ) {
+
+			if ( $description->getDataItem() instanceof DIUri ) {
+				$value = str_replace( [ 'http://', 'https://', '%2A' ], [ '*', '*', '*' ], $value );
+			}
+
+			// Escape to prepare string matching:
+			$value = str_replace(
+				[ '\\', '%', '_', '*', '?' ],
+				[ '\\\\', '\%', '\_', '%', '_' ],
+				$value
+			);
+		}
+
+		return $comparatorMap[$comparator];
+	}
+
+}