Merge pull request #1 from michaelmerrill/multi-file-upload

- New multiple file upload example.
- Added a database to track uploads.
- Replaced the placeholder query with one that gets all the uploaded files.
- New component that list all the uploaded files.

.gitignore

@@ -3,3 +3,4 @@ node_modules
 yarn.lock
 .env
 .DS_Store
+db.json

api/package.json

@@ -16,6 +16,7 @@
     "koa-bodyparser": "^4.2.0",
     "koa-compress": "^2.0.0",
     "koa-router": "^7.1.1",
+    "lowdb": "^0.16.0",
     "source-map-support": "^0.4.14",
     "webpack": "^2.3.3",
     "zoo": "^0.1.9"

api/resolvers.js

@@ -1,13 +1,35 @@
+import low from 'lowdb'
+import fileAsync from 'lowdb/lib/storages/file-async'
+
+// Start database using file-async storage
+const db = low('db.json', {
+  storage: fileAsync
+})
+
+db.defaults({uploads: []})
+  .write()
+
+const saveFile = (file) => {
+  return db.get('uploads')
+    .push(file)
+    .last()
+    .write()
+    .then((result) => result)
+}
 export default {
   Query: {
-    ignore () {
-      return null
+    allUploads () {
+      return db.get('uploads').value()
     }
   },
   Mutation: {
-    singleUpload (root, {file}) {
-      console.log('Uploaded file:', file)
-      return file
+    singleUpload (_, {file}) {
+      return saveFile(file)
+    },
+    multiUpload (_, {files}) {
+      return Promise.all(files.map((file) => {
+        return saveFile(file)
+      })).then((results) => results)
     }
   }
 }

api/schema.graphql

@@ -13,10 +13,10 @@ input Upload {
 }
 
 type Query {
-  # GraphQL will not work without defining a query.
-  ignore: Boolean
+  allUploads: [File]
 }
 
 type Mutation {
   singleUpload (file: Upload!): File!
+  multiUpload (files: [Upload!]!): [File!]!
 }

app/components/multi-uploader.js

@@ -0,0 +1,31 @@
+import {Component} from 'react'
+import {graphql, gql} from 'react-apollo'
+
+class MultiUploader extends Component {
+  handleChange = ({target}) => {
+    if (target.validity.valid) {
+      this.props
+        .mutate({
+          variables: {
+            files: target.files
+          }
+        })
+        .then(({data}) => console.log('Mutation response:', data))
+    }
+  }
+
+  render () {
+    return <input type='file' accept={'image/jpeg,image/png'} multiple required onChange={this.handleChange} />
+  }
+}
+
+export default graphql(gql`
+  mutation multiUpload ($files: [Upload!]!) {
+    multiUpload (files: $files) {
+      name
+      type
+      size
+      path
+    }
+  }
+`)(MultiUploader)

app/components/upload-list.js

@@ -0,0 +1,22 @@
+import {graphql, gql} from 'react-apollo'
+
+const UploadList = ({data: {allUploads, loading}}) => {
+  return (
+    <ul>
+      {allUploads.map((file, i) => {
+        return <li key={i}>{file.name}</li>
+      })}
+    </ul>
+  )
+}
+
+export default graphql(gql`
+  query allUploads {
+    allUploads {
+      name
+      type
+      size
+      path
+    }
+  }
+`)(UploadList)

app/pages/index.js

@@ -1,6 +1,8 @@
 import Head from 'next/head'
 import withData from '../helpers/with-data'
 import SingleUploader from '../components/single-uploader'
+import MultiUploader from '../components/multi-uploader'
+import UploadList from '../components/upload-list'
 
 export default withData(props => (
   <div>
@@ -13,10 +15,24 @@ export default withData(props => (
         body {
           margin: 2em;
         }
+        section {
+          padding-top: 3em;
+        }
       `}</style>
     </Head>
     <h1>Apollo upload example</h1>
-    <p>Select an image to upload and view the response in the console.</p>
-    <SingleUploader />
+    <section>
+      <h2>Single file upload</h2>
+      <p>Select an image to upload and view the response in the console.</p>
+      <SingleUploader />
+    </section>
+    <section>
+      <h2>Multiple file upload</h2>
+      <p>Select multiple images to upload and view the response in the console.</p>
+      <MultiUploader />
+    </section>
+    <section>
+      <UploadList />
+    </section>
   </div>
 ))

app/readme.md

@@ -5,7 +5,7 @@ An example web application using [Next.js](https://github.com/zeit/next.js), [Re
 ## Setup
 
 1. Install the latest [Node.js](https://nodejs.org).
-2. Run `npm install` within the `api` directory in Terminal.
+2. Run `npm install` within the `app` directory in Terminal.
 3. Copy `.env.example`, rename it `.env` and customize.
 
 For development run `npm run dev`.