beginning course scraping from row, and created assets folder with departments.json

src/views/components/CourseCatalogMain.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useMemo } from 'react';
+import React, { useEffect, useMemo, useState } from 'react';
 import ReactDOM from 'react-dom';
 import { Course } from 'src/shared/types/Course';
 import useInfiniteScroll from '../hooks/useInfiniteScroll';
@@ -16,7 +16,7 @@ interface Props {
  */
 export default function CourseCatalogMain({ support }: Props) {
     const [rows, setRows] = React.useState<HTMLTableRowElement[]>([]);
-    const [selectedCourse, setSelectedCourse] = React.useState<Course | null>(null);
+    const [selectedCourse, setSelectedCourse] = useState<Course | null>(null);
 
     const isScrolling = useInfiniteScroll(async () => {
         console.log('infinite scroll');
@@ -32,11 +32,15 @@ export default function CourseCatalogMain({ support }: Props) {
         setRows(rows);
     }, []);
 
+    const handleRowButtonClick = (course: Course) => {
+        setSelectedCourse(course);
+    };
+
     return (
         <div>
             <TableHead>Plus</TableHead>
             {rows.map(row => (
-                <TableRow row={row} />
+                <TableRow row={row} onClick={handleRowButtonClick} />
             ))}
             {isScrolling && <div>Scrolling...</div>}
         </div>

src/views/components/injected/TableHead.tsx

@@ -3,23 +3,23 @@ import ReactDOM from 'react-dom';
 
 /**
  * This adds a new column to the course catalog table header.
- * @returns
+ * @returns a react portal to the new column or null if the column has not been created yet.
  */
 export default function TableHead({ children }: PropsWithChildren) {
-    const [portalContainer, setPortalContainer] = useState<HTMLTableCellElement | null>(null);
+    const [container, setContainer] = useState<HTMLTableCellElement | null>(null);
 
     useEffect(() => {
-        const portalContainer = document.createElement('th');
-        portalContainer.setAttribute('scope', 'col');
-        portalContainer.setAttribute('id', 'ut-registration-plus-table-head');
+        const container = document.createElement('th');
+        container.setAttribute('scope', 'col');
+        container.setAttribute('id', 'ut-registration-plus-table-head');
         const lastTableHeadCell = document.querySelector('table thead th:last-child');
-        lastTableHeadCell!.after(portalContainer);
-        setPortalContainer(portalContainer);
+        lastTableHeadCell!.after(container);
+        setContainer(container);
     }, []);
 
-    if (!portalContainer) {
+    if (!container) {
         return null;
     }
 
-    return ReactDOM.createPortal(<span>{children}</span>, portalContainer);
+    return ReactDOM.createPortal(<span>{children}</span>, container);
 }

src/views/components/injected/TableRow.tsx

@@ -1,24 +1,44 @@
 import React, { useEffect, useState } from 'react';
 import ReactDOM from 'react-dom';
+import { Course } from 'src/shared/types/Course';
 import { Button } from '../common/Button/Button';
 
 interface Props {
     row: HTMLTableRowElement;
+    onClick: (course: Course) => void;
 }
 
-export default function TableRow({ row }: Props) {
-    const [portalContainer, setPortalContainer] = useState<HTMLTableCellElement | null>(null);
+/**
+ * This component is injected into each row of the course catalog table.
+ * @returns a react portal to the new td in the column or null if the column has not been created yet.
+ */
+export default function TableRow({ row, onClick }: Props): JSX.Element | null {
+    const [container, setContainer] = useState<HTMLTableCellElement | null>(null);
+    const [course, setCourse] = useState<Course | null>(null);
 
     useEffect(() => {
         const portalContainer = document.createElement('td');
         const lastTableCell = row.querySelector('td:last-child');
         lastTableCell!.after(portalContainer);
-        setPortalContainer(portalContainer);
+        setContainer(portalContainer);
     }, []);
 
-    if (!portalContainer) {
+    useEffect(() => {
+        const course = scrapeCourseFromRow(row);
+        setCourse(course);
+    }, [row]);
+
+    if (!container || !course) {
         return null;
     }
 
-    return ReactDOM.createPortal(<Button>Plus</Button>, portalContainer);
+    const handleOnClick = () => {
+        onClick(course);
+    };
+
+    return ReactDOM.createPortal(<Button onClick={handleOnClick}>Plus</Button>, container);
+}
+
+function scrapeCourseFromRow(row): Course {
+    return null as any;
 }