move utility methods to @/utils

src/utils/usePutCommas.ts

@@ -0,0 +1,18 @@
+/**
+ * Turns a list of artists into a string of artists separated by commas.
+ * @param artists artists array to put commas in
+ * @returns a string with commas in between each artist
+ */
+export default (artists: string[]) => {
+  let result = [];
+
+  artists.forEach((i, index, artists) => {
+    if (index !== artists.length - 1) {
+      result.push(i + ", ");
+    } else {
+      result.push(i);
+    }
+  });
+
+  return result;
+};