Playlist-level retry configuration

cmd/mxl-player/playlist_file.go

@@ -14,6 +14,13 @@ type playlistFile struct {
 	Entries   []playlistFileEntry `json:"entries"`
 	Loop      bool                `json:"loop"`
 	OnFailure string              `json:"on_failure"`
+	Retry     *playlistFileRetry  `json:"retry"`
+}
+
+type playlistFileRetry struct {
+	MaxAttempts  *int   `json:"max_attempts"`
+	InitialDelay string `json:"initial_delay"`
+	MaxDelay     string `json:"max_delay"`
 }
 
 type playlistFileEntry struct {
@@ -73,6 +80,13 @@ func decodePlaylistFile(reader io.Reader) (playback.Playlist, error) {
 			"on_failure %q: %w", file.OnFailure, playback.ErrPlaylistFailurePolicy,
 		)
 	}
+	if file.Retry != nil {
+		retry, err := decodePlaylistRetry(*file.Retry)
+		if err != nil {
+			return playback.Playlist{}, err
+		}
+		playlist.Retry = &retry
+	}
 	for index, entry := range file.Entries {
 		duration := time.Duration(0)
 		if entry.Duration != "" {
@@ -103,6 +117,37 @@ func decodePlaylistFile(reader io.Reader) (playback.Playlist, error) {
 	return playlist, nil
 }
 
+func decodePlaylistRetry(file playlistFileRetry) (playback.RetryPolicy, error) {
+	retry := playback.RetryPolicy{
+		InitialDelay: initialRetryDelay,
+		MaxDelay:     maxRetryDelay,
+	}
+	if file.MaxAttempts != nil {
+		retry.MaxAttempts = *file.MaxAttempts
+	}
+	var err error
+	if file.InitialDelay != "" {
+		retry.InitialDelay, err = time.ParseDuration(file.InitialDelay)
+		if err != nil {
+			return playback.RetryPolicy{}, fmt.Errorf(
+				"retry initial_delay %q: %w", file.InitialDelay, err,
+			)
+		}
+	}
+	if file.MaxDelay != "" {
+		retry.MaxDelay, err = time.ParseDuration(file.MaxDelay)
+		if err != nil {
+			return playback.RetryPolicy{}, fmt.Errorf(
+				"retry max_delay %q: %w", file.MaxDelay, err,
+			)
+		}
+	}
+	if err := retry.Validate(); err != nil {
+		return playback.RetryPolicy{}, fmt.Errorf("validate playlist retry: %w", err)
+	}
+	return retry, nil
+}
+
 func playlistFileFeedToPlayback(feed *playlistFileFeed) playback.PlaylistFeed {
 	if feed == nil {
 		return playback.PlaylistFeed{}