refactor: extract file drop logic into hook

Co-authored-by: Ona <no-reply@ona.com>

packages/web/src/directories/directory-page/directory-content-table.tsx

@@ -34,6 +34,7 @@ import {
 import { TextFileIcon } from "../../components/icons/text-file-icon"
 import { Button } from "../../components/ui/button"
 import { LoadingSpinner } from "../../components/ui/loading-spinner"
+import { useFileDrop } from "../../files/use-file-drop"
 import { withDefaultOnError } from "../../lib/error"
 import { cn } from "../../lib/utils"
 import { DirectoryPageContext } from "./context"
@@ -397,27 +398,15 @@ function FileItemRow({
 	onClick: () => void
 	onContextMenu: (e: React.MouseEvent) => void
 }) {
-	const [isDraggedOver, setIsDraggedOver] = useState(false)
 	const ref = useRef<HTMLTableRowElement>(null)
 	const setDragInfo = useSetAtom(dragInfoAtom)
-	const store = useStore()
 
-	const { mutate: moveFiles } = useMutation({
-		mutationFn: useContextMutation(api.files.moveFiles),
-		onSuccess: ({
-			items,
-			targetDirectory,
-		}: {
-			items: Id<"files">[]
-			targetDirectory: Doc<"directories">
-		}) => {
-			toast.success(
-				`${items.length} files moved to ${targetDirectory.name}`,
-			)
-		},
+	const { isDraggedOver, dropHandlers } = useFileDrop({
+		item: row.original,
+		dragInfoAtom,
 	})
 
-	function onDragStart(e: React.DragEvent<HTMLTableRowElement>) {
+	const handleDragStart = (e: React.DragEvent) => {
 		if (row.original.kind === "file") {
 			e.dataTransfer.setData(
 				"application/x-internal",
@@ -430,37 +419,7 @@ function FileItemRow({
 		}
 	}
 
-	function onDrop(_e: React.DragEvent<HTMLTableRowElement>) {
-		const dragInfo = store.get(dragInfoAtom)
-		if (dragInfo && row.original.kind === "directory") {
-			moveFiles({
-				targetDirectoryId: row.original.doc._id,
-				items: dragInfo.items,
-			})
-		}
-	}
-
-	function onDragOver(e: React.DragEvent<HTMLTableRowElement>) {
-		const dragInfo = store.get(dragInfoAtom)
-		if (
-			dragInfo &&
-			dragInfo.source !== row.original &&
-			row.original.kind === "directory"
-		) {
-			e.preventDefault()
-			e.dataTransfer.dropEffect = "move"
-			setIsDraggedOver(true)
-		} else {
-			e.dataTransfer.dropEffect = "none"
-		}
-	}
-
-	function onDragLeave() {
-		setIsDraggedOver(false)
-	}
-
-	function onDragEnd() {
-		setIsDraggedOver(false)
+	const handleDragEnd = () => {
 		setDragInfo(null)
 	}
 
@@ -472,11 +431,9 @@ function FileItemRow({
 			data-state={row.getIsSelected() && "selected"}
 			onClick={onClick}
 			onContextMenu={onContextMenu}
-			onDragStart={onDragStart}
-			onDrop={onDrop}
-			onDragOver={onDragOver}
-			onDragLeave={onDragLeave}
-			onDragEnd={onDragEnd}
+			onDragStart={handleDragStart}
+			onDragEnd={handleDragEnd}
+			{...dropHandlers}
 			className={cn({ "bg-muted": isDraggedOver })}
 		>
 			{row.getVisibleCells().map((cell) => (

packages/web/src/directories/directory-page/state.ts

@@ -5,6 +5,7 @@ import type {
 } from "@fileone/convex/model/directories"
 import type { RowSelectionState } from "@tanstack/react-table"
 import { atom } from "jotai"
+import type { FileDragInfo } from "../../files/use-file-drop"
 
 export const contextMenuTargeItemAtom = atom<DirectoryItem | null>(null)
 export const optimisticDeletedItemsAtom = atom(
@@ -23,7 +24,4 @@ export const itemBeingRenamedAtom = atom<{
 
 export const openedFileAtom = atom<Doc<"files"> | null>(null)
 
-export const dragInfoAtom = atom<{
-	source: DirectoryItem
-	items: Id<"files">[]
-} | null>(null)
+export const dragInfoAtom = atom<FileDragInfo | null>(null)

packages/web/src/files/use-file-drop.ts

@@ -0,0 +1,93 @@
+import { api } from "@fileone/convex/_generated/api"
+import type { Doc, Id } from "@fileone/convex/_generated/dataModel"
+import type { DirectoryItem } from "@fileone/convex/model/directories"
+import { useMutation } from "@tanstack/react-query"
+import { useMutation as useContextMutation } from "convex/react"
+import type { Atom } from "jotai"
+import { useStore } from "jotai"
+import { useState } from "react"
+import { toast } from "sonner"
+
+export interface FileDragInfo {
+	source: DirectoryItem
+	items: Id<"files">[]
+}
+
+export interface UseFileDropOptions {
+	item: DirectoryItem
+	dragInfoAtom: Atom<FileDragInfo | null>
+	onDropSuccess?: (items: Id<"files">[], targetDirectory: Doc<"directories">) => void
+}
+
+export interface UseFileDropReturn {
+	isDraggedOver: boolean
+	dropHandlers: {
+		onDrop: (e: React.DragEvent) => void
+		onDragOver: (e: React.DragEvent) => void
+		onDragLeave: () => void
+	}
+}
+
+export function useFileDrop({
+	item,
+	dragInfoAtom,
+	onDropSuccess,
+}: UseFileDropOptions): UseFileDropReturn {
+	const [isDraggedOver, setIsDraggedOver] = useState(false)
+	const store = useStore()
+
+	const { mutate: moveFiles } = useMutation({
+		mutationFn: useContextMutation(api.files.moveFiles),
+		onSuccess: ({
+			items,
+			targetDirectory,
+		}: {
+			items: Id<"files">[]
+			targetDirectory: Doc<"directories">
+		}) => {
+			toast.success(
+				`${items.length} files moved to ${targetDirectory.name}`,
+			)
+			onDropSuccess?.(items, targetDirectory)
+		},
+	})
+
+	const handleDrop = (_e: React.DragEvent) => {
+		const dragInfo = store.get(dragInfoAtom)
+		if (dragInfo && item.kind === "directory") {
+			moveFiles({
+				targetDirectoryId: item.doc._id,
+				items: dragInfo.items,
+			})
+		}
+		setIsDraggedOver(false)
+	}
+
+	const handleDragOver = (e: React.DragEvent) => {
+		const dragInfo = store.get(dragInfoAtom)
+		if (
+			dragInfo &&
+			dragInfo.source !== item &&
+			item.kind === "directory"
+		) {
+			e.preventDefault()
+			e.dataTransfer.dropEffect = "move"
+			setIsDraggedOver(true)
+		} else {
+			e.dataTransfer.dropEffect = "none"
+		}
+	}
+
+	const handleDragLeave = () => {
+		setIsDraggedOver(false)
+	}
+
+	return {
+		isDraggedOver,
+		dropHandlers: {
+			onDrop: handleDrop,
+			onDragOver: handleDragOver,
+			onDragLeave: handleDragLeave,
+		},
+	}
+}