Added arn to the main repository

arn/SoundTrackUtils.go

@@ -0,0 +1,26 @@
+package arn
+
+import (
+	"errors"
+	"regexp"
+)
+
+var youtubeIDRegex = regexp.MustCompile(`youtu(?:.*\/v\/|.*v=|\.be\/)([A-Za-z0-9_-]{11})`)
+
+// GetYoutubeMedia returns an ExternalMedia object for the given Youtube link.
+func GetYoutubeMedia(url string) (*ExternalMedia, error) {
+	matches := youtubeIDRegex.FindStringSubmatch(url)
+
+	if len(matches) < 2 {
+		return nil, errors.New("Invalid Youtube URL")
+	}
+
+	videoID := matches[1]
+
+	media := &ExternalMedia{
+		Service:   "Youtube",
+		ServiceID: videoID,
+	}
+
+	return media, nil
+}