[Task 3] More fixes

task_3_react/src/client/App.tsx

@@ -1,5 +1,6 @@
 import './css/App.css';
 import '@fortawesome/fontawesome-free/css/all.css';
+import './sse';
 import {
     CSV_Data, fileInfo, responseObject
 } from './types';
@@ -15,7 +16,6 @@ import DataTable from './components/DataTable';
 import FileCard from './components/FileCard';
 import InfoCard from './components/InfoCard';
 import Layout from './components/Layout';
-import "./sse"
 
 function App () {
     const [
@@ -35,25 +35,29 @@ function App () {
         fileList,
         setFileList
     ] = useState( null as responseObject | null );
-
     // For the loading spinner in DataTable
-    const [loading, setLoading] = useState(false);
-
+    const [
+        loading,
+        setLoading
+    ] = useState( false );
     // Add evenbt listener for server-sent events on first render
-    const [active, setActive] = useState(false);
+    const [
+        active,
+        setActive
+    ] = useState( false );
 
     useEffect( () => {
         if ( !active ) {
-            document.addEventListener("sse:uploaded", async _ev => {
-                await fetch( '/status', {
+            document.addEventListener( 'sse:uploaded', () => {
+                fetch( '/status', {
                     'method': 'GET'
                 } )
                     .then( response => response.json() )
                     .then( response => setFileList( response ) )
                     .catch( error => console.log( error ) );
             } );
-            document.addEventListener("sse:deleted", async _ev => {
-                await fetch( '/status', {
+            document.addEventListener( 'sse:deleted', () => {
+                fetch( '/status', {
                     'method': 'GET'
                 } )
                     .then( response => response.json() )
@@ -69,13 +73,13 @@ function App () {
                 .then( response => setFileList( response ) )
                 .catch( error => console.log( error ) );
         }
-    })
+    } );
 
     const formRef = useRef( null );
 
     // This is triggered in CSVCard
     const handleFileUpload = async ( e: React.ChangeEvent<HTMLInputElement> ): Promise<void> => {
-        setLoading(true)
+        setLoading( true );
         const file = e.target.files?.[0];
 
         if ( !file ) throw new Error( 'No file received' );
@@ -96,7 +100,7 @@ function App () {
             // Upload to server
             const formData = new FormData( formRef.current );
 
-            await fetch( '/upload', {
+            await fetch( '/upload?fname=' + file.name, {
                 'method': 'POST',
                 'body': formData
             } );
@@ -104,7 +108,7 @@ function App () {
     };
 
     const handleFileChange = async ( fileName: string ) => {
-        setLoading(true)
+        setLoading( true );
 
         const response = await fetch( `/download/${ fileName }` );
         const blob = await response.blob();
@@ -114,6 +118,13 @@ function App () {
 
         const data = await convertCSVtoJSON( text );
 
+        setInfo( {
+            'filesize': blob.size + 'B',
+            'filetype': response.headers.get( 'Content-Type' ) ?? 'text/csv',
+            'filename': fileName,
+            'rowcount': data.length
+        } );
+
         // Updating fileInfo requires more effort since blob doesn't have the metadata
         setLoading( false );
         setData( data );

task_3_react/src/client/components/DataTable.tsx

@@ -5,6 +5,7 @@ import {
     CSV_Data
 } from '../types';
 
+
 const DataTable = ( props: {
     'data': CSV_Data,
     'loading': boolean
@@ -33,6 +34,7 @@ const DataTable = ( props: {
         }
     };
 
+
     if ( sortCol !== 'None' && sortType === 'asc' ) {
         props.data.sort( ( a, b ) => {
             if ( a[sortCol]! < b[sortCol]! ) return -1;
@@ -49,6 +51,8 @@ const DataTable = ( props: {
 
             return 0;
         } );
+    } else {
+        props.data.sort();
     }
 
     return (
@@ -61,8 +65,9 @@ const DataTable = ( props: {
                     <thead>
                         <tr>
                             {
-                                header.map( col => <ColHeader
+                                header.map( ( col, i ) => <ColHeader
                                     col={col}
+                                    key={i}
                                     sortingHandle={sortingHandler}
                                     isSelected={col == sortCol}
                                     sortType={sortType}></ColHeader> )
@@ -74,7 +79,8 @@ const DataTable = ( props: {
                             props.data.map( ( row, i ) => (
                                 <tr key={i}>
                                     {
-                                        header.map( col => <Row key={i} col={col} content={row[col] as string}></Row> )
+                                        header.map( ( col, j ) => <Row key={`${ i }:${ j }`}
+                                            col={col} content={row[col] as string}></Row> )
                                     }
                                 </tr>
                             ) )
@@ -117,4 +123,3 @@ const Row = ( props: {
 };
 
 export default DataTable;
-

task_3_react/src/client/components/InfoCard.tsx

@@ -5,18 +5,21 @@ import {
 const InfoCard = ( props: {
     'info': fileInfo
 } ) => {
-    let noFileMessage = <div></div>;
-
-    if ( props.info.filename === 'None' )
-        noFileMessage = <div id="data-info-placeholder">No file selected</div>;
-
     return (
         <article>
             <header>
                 <h2>Data infos</h2>
+                <InfoRenderer info={props.info}></InfoRenderer>
             </header>
-            <div className="info">
-                {noFileMessage}
+        </article>
+    );
+};
+
+const InfoRenderer = ( props: {
+    'info': fileInfo
+} ) => {
+    if ( props.info.filename !== 'None' ) {
+        return <div className="info">
             <h4>Filename</h4>
             <p>{props.info.filename}</p>
 
@@ -28,10 +31,13 @@ const InfoCard = ( props: {
 
             <h4>Number of rows</h4>
             <p>{props.info.rowcount}</p>
-            </div>
-        </article>
-    );
+        </div>;
+    } else {
+        return <div className="info">
+            <p>No file selected</p>
+        </div>;
+    }
 };
 
-export default InfoCard;
 
+export default InfoCard;

task_3_react/src/client/main.tsx

@@ -1,13 +1,10 @@
-import React from "react";
-import ReactDOM from "react-dom/client";
-import "@fortawesome/fontawesome-free/css/all.css";
-import App from "./App";
-import "@picocss/pico/css/pico.min.css";
+import '@fortawesome/fontawesome-free/css/all.css';
+import './index.css';
+import '@picocss/pico/css/pico.min.css';
+import App from './App';
+import React from 'react';
+import ReactDOM from 'react-dom/client';
 
-import "./index.css";
-
-ReactDOM.createRoot(document.getElementById("root")!).render(
-  <React.StrictMode>
+ReactDOM.createRoot( document.getElementById( 'root' )! ).render( <React.StrictMode>
     <App />
-  </React.StrictMode>,
-);
+</React.StrictMode>, );

task_3_react/src/server/main.ts

@@ -11,17 +11,35 @@ import {
 } from './types';
 
 const app = express();
+
+const sanitizeFilePath = ( path: string ) => {
+    // eslint-disable-next-line no-useless-escape
+    return path.replace( /[\/\\].*/, '' ).replace( '..', '' );
+};
+
 // Set up file storage
 const storage = multer.diskStorage( {
     'destination': './src/server/uploads',
     'filename': (
-        _req, file, cb
+        req, file, cb
     ) => {
         // Suggested in Multer's readme
         const uniqueSuffix = Date.now() + '-' + Math.round( Math.random() * 1E3 );
-        const fname = file.fieldname + '-' + uniqueSuffix;
-        // TODO: We could consider allowing the filename to be overwritten using a query param on the
-        // request (i.e. url would be /upload?fname=<filename>)
+
+        let fname = req.query['fname']
+            ? sanitizeFilePath( String( req.query['fname'] ) )
+            : file.fieldname;
+
+        const index = fname.lastIndexOf( '.' );
+
+        let fext = '';
+
+        if ( index > -1 ) {
+            fname = fname.slice( 0, index );
+            fext = fname.substring( index );
+        }
+
+        fname += '-' + uniqueSuffix + fext;
 
         fileEvent.emit( 'uploaded', fname );