From c4e3999546b541216748098fc08dd40a8090448a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=B2=81=E6=A0=91=E4=BA=BA?= <lu.shuren@um-react.app>
Date: Sun, 21 May 2023 16:36:21 +0100
Subject: [PATCH] feat: add basic file drag & drop support (#6)

---
 README.MD          |  2 +-
 package.json       |  1 +
 pnpm-lock.yaml     | 30 ++++++++++++++++++++++++++++++
 src/SelectFile.tsx | 36 ++++++++++++++++++++++--------------
 4 files changed, 54 insertions(+), 15 deletions(-)

diff --git a/README.MD b/README.MD
index db09a94..baa6661 100644
--- a/README.MD
+++ b/README.MD
@@ -72,7 +72,7 @@ pnpm link ../libparakeet-js/npm
 
 ## TODO
 
-- [ ] #6 文件拖放 (利用 `react-dropzone`?)
+- [x] #6 文件拖放 (利用 `react-dropzone`?)
 - [ ] 各类算法 [追踪 `crypto` 标签](https://git.unlock-music.dev/um/um-react/issues?labels=67)
 - [ ] #7 简易元数据编辑器
 - [x] ~#8 添加单元测试~ 框架加上了，以后慢慢添加更多测试即可。
diff --git a/package.json b/package.json
index b5f6f5b..b2f05d0 100644
--- a/package.json
+++ b/package.json
@@ -26,6 +26,7 @@
     "nanoid": "^4.0.2",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
+    "react-dropzone": "^14.2.3",
     "react-promise-suspense": "^0.3.4",
     "react-redux": "^8.0.5"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 77d34a3..cd021d5 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -31,6 +31,9 @@ dependencies:
   react-dom:
     specifier: ^18.2.0
     version: 18.2.0(react@18.2.0)
+  react-dropzone:
+    specifier: ^14.2.3
+    version: 14.2.3(react@18.2.0)
   react-promise-suspense:
     specifier: ^0.3.4
     version: 0.3.4
@@ -2879,6 +2882,12 @@ packages:
       { integrity: sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q== }
     dev: true
 
+  /attr-accept@2.2.2:
+    resolution:
+      { integrity: sha512-7prDjvt9HmqiZ0cl5CRjtS84sEyhsHP2coDkaZKRKVfCDo9s7iw7ChVmar78Gu9pC4SoR/28wFu/G5JJhTnqEg== }
+    engines: { node: '>=4' }
+    dev: false
+
   /available-typed-arrays@1.0.5:
     resolution:
       { integrity: sha512-DMD0KiN46eipeziST1LPP/STfDU0sufISXmjSgvVsoU2tqxctQeASejWcfNtxYKqETM1UxQ8sp2OrSBWpHY6sw== }
@@ -3671,6 +3680,14 @@ packages:
       flat-cache: 3.0.4
     dev: true
 
+  /file-selector@0.6.0:
+    resolution:
+      { integrity: sha512-QlZ5yJC0VxHxQQsQhXvBaC7VRJ2uaxTf+Tfpu4Z/OcVQJVpZO+DGU0rkoVW5ce2SccxugvpBJoMvUs59iILYdw== }
+    engines: { node: '>= 12' }
+    dependencies:
+      tslib: 2.5.0
+    dev: false
+
   /fill-range@7.0.1:
     resolution:
       { integrity: sha512-qOo9F+dMUmC2Lcb4BbVvnKJxTPjCm+RRpe4gDuGrzkL7mEVl/djYSu2OdQ2Pa302N4oqkSg9ir6jaLWJ2USVpQ== }
@@ -5041,6 +5058,19 @@ packages:
       react: 18.2.0
       scheduler: 0.23.0
 
+  /react-dropzone@14.2.3(react@18.2.0):
+    resolution:
+      { integrity: sha512-O3om8I+PkFKbxCukfIR3QAGftYXDZfOE2N1mr/7qebQJHs7U+/RSL/9xomJNpRg9kM5h9soQSdf0Gc7OHF5Fug== }
+    engines: { node: '>= 10.13' }
+    peerDependencies:
+      react: '>= 16.8 || 18.0.0'
+    dependencies:
+      attr-accept: 2.2.2
+      file-selector: 0.6.0
+      prop-types: 15.8.1
+      react: 18.2.0
+    dev: false
+
   /react-fast-compare@3.2.1:
     resolution:
       { integrity: sha512-xTYf9zFim2pEif/Fw16dBiXpe0hoy5PxcD8+OwBnTtNLfIm3g6WxhKNurY+6OmdH1u6Ta/W/Vl6vjbYP1MFnDg== }
diff --git a/src/SelectFile.tsx b/src/SelectFile.tsx
index df28f78..181c6fe 100644
--- a/src/SelectFile.tsx
+++ b/src/SelectFile.tsx
@@ -1,21 +1,27 @@
-import React, { useId } from 'react';
-
+import { useDropzone } from 'react-dropzone';
 import { Box, Text } from '@chakra-ui/react';
 import { UnlockIcon } from '@chakra-ui/icons';
+
 import { useAppDispatch } from './hooks';
 import { addNewFile, processFile } from './features/file-listing/fileListingSlice';
 import { nanoid } from 'nanoid';
 
 export function SelectFile() {
   const dispatch = useAppDispatch();
-  const id = useId();
+  const { getRootProps, getInputProps, isDragActive } = useDropzone({
+    multiple: true,
+    onDropAccepted(files, _event) {
+      console.debug(
+        'react-dropzone/onDropAccepted(%o, %o)',
+        files.length,
+        files.map((x) => x.name)
+      );
 
-  const handleFileSelection = (e: React.ChangeEvent<HTMLInputElement>) => {
-    if (e.target.files) {
-      for (const file of e.target.files) {
+      for (const file of files) {
         const blobURI = URL.createObjectURL(file);
         const fileName = file.name;
         const fileId = 'file://' + nanoid();
+
         // FIXME: this should be a single action/thunk that first adds the item, then updates it.
         dispatch(
           addNewFile({
@@ -26,15 +32,12 @@ export function SelectFile() {
         );
         dispatch(processFile({ fileId }));
       }
-    }
-
-    e.target.value = '';
-  };
+    },
+  });
 
   return (
     <Box
-      as="label"
-      htmlFor={id}
+      {...getRootProps()}
       w="100%"
       maxW={480}
       borderWidth="1px"
@@ -49,17 +52,22 @@ export function SelectFile() {
         borderColor: 'gray.400',
         bg: 'gray.50',
       }}
+      {...(isDragActive && {
+        bg: 'blue.50',
+        borderColor: 'blue.700',
+      })}
     >
+      <input {...getInputProps()} />
+
       <Box pb={3}>
         <UnlockIcon boxSize={8} />
       </Box>
       <Box textAlign="center">
-        {/* 将文件拖到此处，或 */}
+        将文件拖到此处，或
         <Text as="span" color="teal.400">
           点我选择
         </Text>
         需要解密的文件
-        <input id={id} type="file" hidden multiple onChange={handleFileSelection} />
         <Text fontSize="sm" opacity="50%">
           仅在浏览器内对文件进行解锁，无需消耗流量
         </Text>