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import { create } from "zustand";
export interface TimelineClip {
id: string;
mediaId: string;
name: string;
duration: number;
}
export interface TimelineTrack {
id: string;
name: string;
type: "video" | "audio" | "effects";
clips: TimelineClip[];
}
interface TimelineStore {
tracks: TimelineTrack[];
// Actions
addTrack: (type: "video" | "audio" | "effects") => string;
removeTrack: (trackId: string) => void;
addClipToTrack: (trackId: string, clip: Omit<TimelineClip, "id">) => void;
removeClipFromTrack: (trackId: string, clipId: string) => void;
moveClipToTrack: (
fromTrackId: string,
toTrackId: string,
clipId: string,
insertIndex?: number
) => void;
reorderClipInTrack: (
trackId: string,
clipId: string,
newIndex: number
) => void;
// Computed values
getTotalDuration: () => number;
}
export const useTimelineStore = create<TimelineStore>((set, get) => ({
tracks: [],
addTrack: (type) => {
const newTrack: TimelineTrack = {
id: crypto.randomUUID(),
name: `${type.charAt(0).toUpperCase() + type.slice(1)} Track`,
type,
clips: [],
};
set((state) => ({
tracks: [...state.tracks, newTrack],
}));
return newTrack.id;
},
removeTrack: (trackId) => {
set((state) => ({
tracks: state.tracks.filter((track) => track.id !== trackId),
}));
},
addClipToTrack: (trackId, clipData) => {
const newClip: TimelineClip = {
...clipData,
id: crypto.randomUUID(),
};
set((state) => ({
tracks: state.tracks.map((track) =>
track.id === trackId
? { ...track, clips: [...track.clips, newClip] }
: track
),
}));
},
removeClipFromTrack: (trackId, clipId) => {
set((state) => ({
tracks: state.tracks.map((track) =>
track.id === trackId
? {
...track,
clips: track.clips.filter((clip) => clip.id !== clipId),
}
: track
),
}));
},
moveClipToTrack: (fromTrackId, toTrackId, clipId, insertIndex) => {
set((state) => {
// Find the clip to move
const fromTrack = state.tracks.find((track) => track.id === fromTrackId);
const clipToMove = fromTrack?.clips.find((clip) => clip.id === clipId);
if (!clipToMove) return state;
return {
tracks: state.tracks.map((track) => {
if (track.id === fromTrackId) {
// Remove clip from source track
return {
...track,
clips: track.clips.filter((clip) => clip.id !== clipId),
};
} else if (track.id === toTrackId) {
// Add clip to destination track
const newClips = [...track.clips];
const index =
insertIndex !== undefined ? insertIndex : newClips.length;
newClips.splice(index, 0, clipToMove);
return {
...track,
clips: newClips,
};
}
return track;
}),
};
});
},
reorderClipInTrack: (trackId, clipId, newIndex) => {
set((state) => ({
tracks: state.tracks.map((track) => {
if (track.id !== trackId) return track;
const clipIndex = track.clips.findIndex((clip) => clip.id === clipId);
if (clipIndex === -1) return track;
const newClips = [...track.clips];
const [movedClip] = newClips.splice(clipIndex, 1);
newClips.splice(newIndex, 0, movedClip);
return { ...track, clips: newClips };
}),
}));
},
getTotalDuration: () => {
const { tracks } = get();
if (tracks.length === 0) return 0;
// Calculate the duration of each track (sum of all clips in that track)
const trackDurations = tracks.map((track) =>
track.clips.reduce((total, clip) => total + clip.duration, 0)
);
// Return the maximum track duration (longest track determines project duration)
return Math.max(...trackDurations, 0);
},
}));
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