feat: initial commit bs code

src/views/components/injected/CollapsibleCourses/CourseCollapsible.tsx

@@ -0,0 +1,62 @@
+import React, { useEffect, useState } from 'react';
+import ReactDOM from 'react-dom';
+
+function getCourseSections() {
+    const table = document.querySelector('table');
+    if (!table) return [];
+
+    const rows = Array.from(table.querySelectorAll('tr'));
+    const sections: { header: HTMLTableRowElement; children: HTMLTableRowElement[] }[] = [];
+    let currentSection: { header: HTMLTableRowElement; children: HTMLTableRowElement[] } | null = null;
+
+    for (const row of rows) {
+        const headerCell = row.querySelector('td.course_header');
+        if (headerCell) {
+            if (currentSection) sections.push(currentSection);
+            currentSection = { header: row, children: [] };
+        } else if (currentSection) {
+            currentSection.children.push(row);
+        }
+    }
+    if (currentSection) sections.push(currentSection);
+    return sections;
+}
+
+const CollapsibleSection: React.FC<{
+    header: HTMLTableRowElement;
+    childrenRows: HTMLTableRowElement[];
+}> = ({ header, childrenRows }) => {
+    const [open, setOpen] = useState(false);
+
+    useEffect(() => {
+        // Hide children rows initially
+        childrenRows.forEach(row => (row.style.display = open ? '' : 'none'));
+        // Clean up on unmount
+        return () => {
+            childrenRows.forEach(row => (row.style.display = ''));
+        };
+    }, [open, childrenRows]);
+
+    // Inject a button into the header cell
+    useEffect(() => {
+        const cell = header.querySelector('td.course_header');
+        if (!cell) return;
+        let button = cell.querySelector('.utrp-collapse-btn') as HTMLButtonElement | null;
+        if (!button) {
+            button = document.createElement('button');
+            button.className = 'utrp-collapse-btn';
+            button.style.marginRight = '8px';
+            cell.prepend(button);
+        }
+        button.textContent = open ? '▼' : '►';
+        button.onclick = () => setOpen(o => !o);
+        // Clean up
+        return () => {
+            button?.remove();
+        };
+    }, [header, open]);
+
+    return null;
+};
+
+export default