react-dropzone による csv 取り込みを試してみる

sample/package.json

@@ -24,6 +24,7 @@
     "react": "^18.3.1",
     "react-admin": "^5.1.1",
     "react-dom": "^18.3.1",
+    "react-dropzone": "^14.2.3",
     "react-router-dom": "^6.24.1",
     "zod": "^3.23.8",
     "zustand": "^4.5.4"

sample/src/components/organisms/products/dropzone.stories.tsx

@@ -0,0 +1,27 @@
+import Dropzone from '@/components/organisms/products/dropzone'
+import type { Meta, StoryObj } from '@storybook/react'
+import { useState } from 'react'
+
+const meta: Meta<typeof Dropzone> = {
+  title: 'organisms/products/dropzone',
+  component: Dropzone,
+  parameters: {
+    // Optional parameter to center the component in the Canvas. More info: https://storybook.js.org/docs/configure/story-layout
+    layout: 'centered',
+  },
+  tags: ['autodocs'],
+}
+
+export default meta
+
+type Story = StoryObj<typeof Dropzone>
+
+/**
+ * 一括登録ボタン
+ */
+export const Default: Story = {
+  render: () => {
+    const [file, setFile] = useState<File | null>(null)
+    return <Dropzone file={file} setFile={setFile} />
+  },
+}

sample/src/components/organisms/products/dropzone.tsx

@@ -0,0 +1,54 @@
+import React, { useCallback } from 'react'
+import { useDropzone } from 'react-dropzone'
+
+type Props = {
+  file: File | null
+  setFile: (file: File) => void
+}
+
+const DropZone = React.memo(function DropZone({ file, setFile }: Props) {
+  const onDrop = useCallback(
+    async (acceptedFiles: File[]) => {
+      const importFile = acceptedFiles[0]
+      if (!importFile) return
+
+      setFile(importFile)
+    },
+    [setFile],
+  )
+  const {
+    getRootProps,
+    getInputProps,
+    isDragAccept,
+    isDragReject,
+    isDragActive,
+  } = useDropzone({
+    onDrop,
+    accept: {
+      'text/csv': ['.csv'],
+    },
+    maxFiles: 1,
+  })
+  const message = useCallback(() => {
+    if (file) return `${file.name} が読み込まれています`
+
+    if (isDragReject)
+      return 'ファイル形式が不正、もしくは複数のファイル取り込もうとしています。'
+
+    if (isDragActive && isDragAccept) return '読み込み可能な形式です'
+
+    return 'ファイルをここに D&D するか、クリックしてファイルを選択してください'
+  }, [file, isDragReject, isDragActive, isDragAccept])
+
+  return (
+    <div
+      {...getRootProps()}
+      className={`w-full min-h-56 border-dashed border-gray-800 border-2 flex items-center rounded-3xl justify-center ${file ? 'bg-green-200' : ''}`}
+    >
+      <input {...getInputProps()} />
+      <p className="text-center">{message()}</p>
+    </div>
+  )
+})
+
+export default DropZone

sample/src/pages/product-list.tsx

@@ -5,12 +5,13 @@ import ProductDeletionForm from '@/components/molecules/forms/products/product-d
 import ProductEditingForm from '@/components/molecules/forms/products/product-editing-form'
 import Modal from '@/components/molecules/modals/modal'
 import BulkImportButton from '@/components/organisms/products/bulk-import-button'
+import DropZone from '@/components/organisms/products/dropzone'
 import TenantsTemplate from '@/components/templates/tenants-template'
 import { useProducts } from '@/hooks/use-products'
 import { getProductsAndRefresh } from '@/reducks/products/selectors'
 import { Product } from '@/reducks/products/types'
 import { css } from '@emotion/react'
-import { useEffect, useState } from 'react'
+import React, { useEffect, useState } from 'react'
 
 const styles = {
   button: css`
@@ -45,6 +46,7 @@ const ProductList: React.FC = () => {
   const [isDeleteDialogOpen, setIsDeleteDialogOpen] = useState(false)
   const [currentProduct, setCurrentProduct] = useState<Product | null>(null)
   const [productToDelete, setProductToDelete] = useState<Product | null>(null)
+  const [file, setFile] = useState<File | null>(null)
 
   useEffect(() => {
     refresh()
@@ -57,6 +59,7 @@ const ProductList: React.FC = () => {
         新規作成
       </button>
       <BulkImportButton />
+      <DropZone file={file} setFile={setFile} />
 
       {isDeleteDialogOpen && productToDelete && (
         <div css={styles.overlay}>