Add available function to check if season streams are available

episode.go

@@ -112,8 +112,8 @@ func EpisodeFromID(crunchy *Crunchyroll, id string) (*Episode, error) {
 // Every episode in a season (should) have the same audio locale,
 // so if you want to get the audio locale of a season, just call
 // this method on the first episode of the season.
-// Will fail if no streams are available, thus use Available to
-// prevent any misleading errors.
+// Will fail if no streams are available, thus use Episode.Available
+// to prevent any misleading errors.
 func (e *Episode) AudioLocale() (LOCALE, error) {
 	streams, err := e.Streams()
 	if err != nil {

season.go

@@ -70,8 +70,9 @@ func SeasonFromID(crunchy *Crunchyroll, id string) (*Season, error) {
 }
 
 // AudioLocale returns the audio locale of the season.
+// Will fail if no streams are available, thus use Season.Available
+// to prevent any misleading errors.
 func (s *Season) AudioLocale() (LOCALE, error) {
-	// TODO: Add a function like Episode.Available to prevent this from returning an unwanted error when the account is non-premium
 	episodes, err := s.Episodes()
 	if err != nil {
 		return "", err
@@ -79,6 +80,15 @@ func (s *Season) AudioLocale() (LOCALE, error) {
 	return episodes[0].AudioLocale()
 }
 
+// Available returns if downloadable streams for this season are available.
+func (s *Season) Available() (bool, error) {
+	episodes, err := s.Episodes()
+	if err != nil {
+		return false, err
+	}
+	return episodes[0].Available(), nil
+}
+
 // Episodes returns all episodes which are available for the season.
 func (s *Season) Episodes() (episodes []*Episode, err error) {
 	if s.children != nil {

url.go

@@ -21,6 +21,7 @@ func (c *Crunchyroll) ExtractEpisodesFromUrl(url string, audio ...LOCALE) ([]*Ep
 		}
 		for _, season := range seasons {
 			if audio != nil {
+
 				locale, err := season.AudioLocale()
 				if err != nil {
 					return nil, err