1 files changed, 47 insertions, 0 deletions
diff --git a/www/wiki/extensions/Maps/src/Presentation/ParameterExtractor.php b/www/wiki/extensions/Maps/src/Presentation/ParameterExtractor.php
new file mode 100644
index 00000000..33a93658
--- /dev/null
+++ b/www/wiki/extensions/Maps/src/Presentation/ParameterExtractor.php
@@ -0,0 +1,47 @@
+<?php
+
+declare( strict_types = 1 );
+
+namespace Maps\Presentation;
+
+/**
+ * @licence GNU GPL v2+
+ * @author Jeroen De Dauw < jeroendedauw@gmail.com >
+ */
+class ParameterExtractor {
+
+	/**
+	 * Extracts the value of a parameter from a parameter list.
+	 *
+	 * @param string[] $parameterNames Name and aliases of the parameter. First match gets used
+	 * @param string[] $rawParameters Parameters that did not get processed further than being put in a key-value map
+	 *
+	 * @return string|null
+	 */
+	public function extract( array $parameterNames, array $rawParameters ) {
+		foreach( $parameterNames as $parameterName ) {
+			foreach ( $rawParameters as $rawName => $rawValue ) {
+				if ( trim( strtolower( $rawName ) ) === $parameterName ) {
+					return trim( $rawValue );
+				}
+			}
+		}
+
+		return null;
+	}
+
+	public static function extractFromKeyValueStrings( array $keyValueStrings ) {
+		$rawParameters = [];
+
+		foreach ( $keyValueStrings as $keyValueString ) {
+			$parts = explode( '=', $keyValueString, 2 );
+
+			if ( count( $parts ) === 2 ) {
+				$rawParameters[$parts[0]] = $parts[1];
+			}
+		}
+
+		return $rawParameters;
+	}
+
+}