feat: Convert data from ResourceStore based on preferences

src/util/Util.ts

@@ -12,4 +12,33 @@ import { Readable } from 'stream';
  */
 export const ensureTrailingSlash = (path: string): string => path.replace(/\/*$/u, '/');
 
+/**
+ * Joins all strings of a stream.
+ * @param stream - Stream of strings.
+ *
+ * @returns The joined string.
+ */
 export const readableToString = async(stream: Readable): Promise<string> => (await arrayifyStream(stream)).join('');
+
+/**
+ * Checks if the given two media types/ranges match each other.
+ * Takes wildcards into account.
+ * @param mediaA - Media type to match.
+ * @param mediaB - Media type to match.
+ *
+ * @returns True if the media type patterns can match each other.
+ */
+export const matchingMediaType = (mediaA: string, mediaB: string): boolean => {
+  const [ typeA, subTypeA ] = mediaA.split('/');
+  const [ typeB, subTypeB ] = mediaB.split('/');
+  if (typeA === '*' || typeB === '*') {
+    return true;
+  }
+  if (typeA !== typeB) {
+    return false;
+  }
+  if (subTypeA === '*' || subTypeB === '*') {
+    return true;
+  }
+  return subTypeA === subTypeB;
+};