new features

src/shared/hooks/useTimelineTracks.ts

@@ -0,0 +1,47 @@
+import { useMemo } from "react"
+
+import type { SelectedFile, UsedFile } from "@shared/context/WorkspaceContext"
+
+export interface TimelineTracks {
+	showWaveform: boolean
+	showVideoFrames: boolean
+	showSubtitles: boolean
+	showSilence: boolean
+	showBRoll: boolean
+}
+
+const DEFAULT_TRACKS: TimelineTracks = {
+	showWaveform: false,
+	showVideoFrames: false,
+	showSubtitles: false,
+	showSilence: false,
+	showBRoll: false,
+}
+
+export function useTimelineTracks(
+	usedFiles: UsedFile[],
+	selectedFile: SelectedFile | null,
+): TimelineTracks {
+	return useMemo(() => {
+		if (!selectedFile) return DEFAULT_TRACKS
+
+		const hasVideo = usedFiles.some((f) => f.iconType === "video")
+		const hasAudio = usedFiles.some(
+			(f) => f.iconType === "audio" || f.iconType === "video",
+		)
+		const hasTranscription = usedFiles.some(
+			(f) => f.artifactType === "TRANSCRIPTION_JSON",
+		)
+		const hasSilence = usedFiles.some(
+			(f) => f.artifactType === "SILENCE_REMOVED_VIDEO",
+		)
+
+		return {
+			showVideoFrames: hasVideo,
+			showWaveform: hasAudio,
+			showSubtitles: hasTranscription,
+			showSilence: hasSilence,
+			showBRoll: false,
+		}
+	}, [usedFiles, selectedFile])
+}