infio-copilot/src/components/chat-view/chat-input/plugins/image/DragDropPastePlugin.tsx

import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext'
import { DRAG_DROP_PASTE } from '@lexical/rich-text'
import { COMMAND_PRIORITY_LOW } from 'lexical'
import { useEffect } from 'react'

import { MentionableImage } from '../../../../../types/mentionable'
import { fileToMentionableImage } from '../../../../../utils/image'

export default function DragDropPaste({
	onCreateImageMentionables,
}: {
	onCreateImageMentionables?: (mentionables: MentionableImage[]) => void
}): null {
	const [editor] = useLexicalComposerContext()

	useEffect(() => {
		return editor.registerCommand(
			DRAG_DROP_PASTE, // dispatched in RichTextPlugin
			(files) => {
				; (async () => {
					const images = files.filter((file) => file.type.startsWith('image/'))
					const mentionableImages = await Promise.all(
						images.map(async (image) => await fileToMentionableImage(image)),
					)
					onCreateImageMentionables?.(mentionableImages)
				})()
				return true
			},
			COMMAND_PRIORITY_LOW,
		)
	}, [editor, onCreateImageMentionables])

	return null
}