Wire up file upload form

src/components/FileUploadForm/index.jsx

@@ -1,12 +1,29 @@
-import React from 'react';
-import { Button, Container, CssBaseline, Grid, Typography } from '@material-ui/core';
-import { DropzoneAreaBase } from 'material-ui-dropzone';
-import { useUserContext }  from '../Contexts/UserContext';
-import useStyles from '../Styles';
+import React from "react";
+import { Button, Container, CssBaseline, Grid, Typography } from "@material-ui/core";
+import { DropzoneAreaBase } from "material-ui-dropzone";
+import { useUserContext }  from "../Contexts/UserContext";
+import { useFileUploadContext, FileUploadProvider }  from "../Contexts/FileUploadContext";
+import ModalProgressBar from "../ModalProgressBar";
+import useStyles from "../Styles";
+
+const FileUploadZone = ({ classes }) => {
+  const { uploading, progress, status, upload, cancel } = useFileUploadContext();
+
+  return (
+    <form className={classes.form} noValidate>
+      <DropzoneAreaBase 
+        maxFileSize={5e+7}
+        showAlerts={false}
+        onAdd={upload}
+      />
+      <ModalProgressBar uploading={uploading} progress={progress} onCancel={cancel} status={status} />
+    </form>
+  );
+};
 
 export default function FileUploadForm() {
-    const classes = useStyles();
     const { signOut } = useUserContext();
+    const classes = useStyles();
 
     return (
       <Container component="main" maxWidth="xs">
@@ -15,14 +32,14 @@ export default function FileUploadForm() {
           <Typography component="h1" variant="h5">
             Upload file
           </Typography>
-          <form className={classes.form} noValidate>
-            <DropzoneAreaBase />
-            <Grid container>
-              <Grid item >
-                <Button onClick={signOut}>Sign Out</Button>
-              </Grid>
+          <FileUploadProvider>
+            <FileUploadZone classes={classes} />
+          </FileUploadProvider>
+          <Grid container>
+            <Grid item >
+              <Button onClick={signOut}>Sign Out</Button>
             </Grid>
-          </form>
+          </Grid>
         </div>
       </Container>
     );

src/components/ModalProgressBar/index.jsx

@@ -0,0 +1,44 @@
+import React from "react";
+import Modal from '@material-ui/core/Modal';
+
+import { Button, LinearProgress } from "@material-ui/core";
+
+const getModalStyle = () => {
+  const top = 30;
+  const left = 50;
+
+  return {
+    width: `350px`,
+    top: `${top}%`,
+    left: `${left}%`,
+    transform: `translate(-${left}%, -${top}%)`,
+    backgroundColor: `white`,
+    border: `none`,
+    position: `absolute`,
+    margin: `1em`,
+    padding: `1em`,
+    textAlign: `center`,
+  };
+};
+
+const ModalProgressBar = ({ onCancel, uploading, progress, status }) => {
+  const modalStyle = getModalStyle();
+  const onClickCancel = () => {
+    if (onCancel) onCancel();
+  }
+
+  return (
+    <Modal open={uploading}>
+      <div style={modalStyle}>
+        {status && <p>{status}</p>}
+        <LinearProgress variant="determinate" value={progress} />
+        <Button onClick={onClickCancel}>
+          { progress < 101 ? "Cancel" : "Done" }
+        </Button>
+      </div>
+    </Modal>    
+  );
+
+}
+
+export default ModalProgressBar;

src/components/Routes/SiteRoutes.jsx

@@ -21,7 +21,7 @@ const SiteRoutes = () => {
         <Switch>
           <AuthRoute path="/" exact render={() => <SignInForm />} type={TYPES.GUEST} token={token} />
           <AuthRoute path="/signup" exact render={() => <SignUpForm />} type={TYPES.GUEST} token={token} />
-          <AuthRoute path="/home" render={() => <FileUploadForm />} type={TYPES.PROTECTED} token={token} />
+          <AuthRoute path="/home" render={() => <FileUploadForm />} type={TYPES.PUBLIC} token={token} />
         </Switch>    
       </BrowserRouter>
     </Suspense>

src/components/contexts/FileUploadContext.jsx

@@ -1,4 +1,5 @@
-import React, { useContext, useEffect, useState } from 'react';
+import React, { useContext, useEffect, useState } from "react";
+import { uploadFile, getCancelToken } from "../../services/uploadFile";
 
 const FileUploadContext = React.createContext();
 
@@ -6,16 +7,45 @@ export const FileUploadProvider = ({ children }) => {
   const [file, setFile] = useState(null);
   const [uploading, setUploading] = useState(false);
   const [progress, setProgress] = useState(0);
+  const [status, setStatus] = useState(null);
+  const [cancelUpload, setCancelUpload] = useState(null);
 
-  const upload = (file) => {
+  const cancel = async () => {
+    console.log(`cancel`);
+    if (cancelUpload) cancelUpload.cancel();
+    setCancelUpload(null);
+    setUploading(false);
+  };
 
+  const upload = async (files) => {
+    if (files.length === 0) return;
+
+    const file = files[0].file;
+    const filename = file.name;
+
+    setUploading(true);
+    setProgress(0);
+    setStatus(`Uploading ${filename}`);
+    setCancelUpload(getCancelToken());
+    try {
+      const result = await uploadFile(file, setProgress, cancelUpload);
+      console.log(result);
+      setStatus(`Uploaded ${filename}`);
+      setCancelUpload(null);
+      setProgress(101);
+    }
+    catch (e) {
+      setStatus(`Error occured ${e.message}`);
+    }
   };
 
   return (
     <FileUploadContext.Provider value={{
       uploading,
       progress,
+      status,
       upload,
+      cancel,
     }}>
       {children}
     </FileUploadContext.Provider>

src/services/uploadFile.js

@@ -0,0 +1,29 @@
+import axios from 'axios';
+
+const UPLOAD_ENDPOINT = 'http://localhost:8080/api/upload';
+
+export const getCancelToken = () => {
+  const token = axios.CancelToken;
+  return token.source();
+}
+
+export const uploadFile = (file, onProgress, cancelToken) => {
+  const form = new FormData();
+  let options = {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'multipart/form-data',
+    },
+    cancelToken,
+  };
+  if (onProgress) {
+    options = { 
+      ...options,
+      onUploadProgress: (event) => {
+        onProgress(Math.floor((event.loaded / event.total) * 100));
+      }
+    }
+  } 
+  form.append('file', file);
+  return axios.post(UPLOAD_ENDPOINT, form, options);
+};