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import { useEffect, useReducer, useState, type RefObject } from "react";
import { useEditor } from "@/editor/use-editor";
import { useCommittedRef } from "@/hooks/use-committed-ref";
import {
DragDropController,
type DragDropConfig,
} from "@/timeline/controllers/drag-drop-controller";
interface UseTimelineDragDropProps {
containerRef: RefObject<HTMLDivElement | null>;
headerRef?: RefObject<HTMLElement | null>;
tracksScrollRef?: RefObject<HTMLDivElement | null>;
zoomLevel: number;
}
export function useTimelineDragDrop({
containerRef,
headerRef,
tracksScrollRef,
zoomLevel,
}: UseTimelineDragDropProps) {
const editor = useEditor();
const config: DragDropConfig = {
zoomLevel,
getContainerEl: () => containerRef.current,
getHeaderEl: () => headerRef?.current ?? null,
getTracksScrollEl: () => tracksScrollRef?.current ?? null,
getActiveProjectFps: () => editor.project.getActive()?.settings.fps ?? null,
getActiveProjectId: () =>
editor.project.getActiveOrNull()?.metadata.id ?? null,
getSceneTracks: () => editor.scenes.getActiveScene().tracks,
getCurrentPlayheadTime: () => editor.playback.getCurrentTime(),
getMediaAssets: () => editor.media.getAssets(),
dragSource: editor.timeline.dragSource,
addMediaAsset: (args) => editor.media.addMediaAsset(args),
executeCommand: (command) => editor.command.execute({ command }),
insertElement: (args) => editor.timeline.insertElement(args),
updateElements: (args) => editor.timeline.updateElements(args),
addClipEffect: (args) => editor.timeline.addClipEffect(args),
};
const configRef = useCommittedRef(config);
const [controller] = useState(() => new DragDropController({ configRef }));
const [, rerender] = useReducer((n: number) => n + 1, 0);
useEffect(() => controller.subscribe(rerender), [controller]);
useEffect(() => () => controller.destroy(), [controller]);
return {
isDragOver: controller.isDragOver,
dropTarget: controller.dropTarget,
dragElementType: controller.dragElementType,
dragProps: {
onDragEnter: controller.onDragEnter,
onDragOver: controller.onDragOver,
onDragLeave: controller.onDragLeave,
onDrop: controller.onDrop,
},
};
}
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