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import type { SceneTracks, TimelineTrack } from "@/lib/timeline";
import type { GroupTrackSection } from "./types";
export interface TrackPlacement {
trackId: string;
trackType: TimelineTrack["type"];
section: GroupTrackSection;
sectionIndex: number;
displayIndex: number;
}
export function getDisplayTracks({
tracks,
}: {
tracks: SceneTracks;
}): TimelineTrack[] {
return [...tracks.overlay, tracks.main, ...tracks.audio];
}
export function getTrackPlacementById({
tracks,
trackId,
}: {
tracks: SceneTracks;
trackId: string;
}): TrackPlacement | null {
if (tracks.main.id === trackId) {
return {
trackId,
trackType: tracks.main.type,
section: "main",
sectionIndex: -1,
displayIndex: tracks.overlay.length,
};
}
const overlayTrackIndex = tracks.overlay.findIndex(
(track) => track.id === trackId,
);
if (overlayTrackIndex >= 0) {
return {
trackId,
trackType: tracks.overlay[overlayTrackIndex].type,
section: "overlay",
sectionIndex: overlayTrackIndex,
displayIndex: overlayTrackIndex,
};
}
const audioTrackIndex = tracks.audio.findIndex(
(track) => track.id === trackId,
);
if (audioTrackIndex >= 0) {
return {
trackId,
trackType: tracks.audio[audioTrackIndex].type,
section: "audio",
sectionIndex: audioTrackIndex,
displayIndex: tracks.overlay.length + 1 + audioTrackIndex,
};
}
return null;
}
export function getTrackPlacementByDisplayIndex({
tracks,
displayIndex,
}: {
tracks: SceneTracks;
displayIndex: number;
}): TrackPlacement | null {
const displayTracks = getDisplayTracks({ tracks });
const track = displayTracks[displayIndex];
if (!track) {
return null;
}
return getTrackPlacementById({
tracks,
trackId: track.id,
});
}
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