1 files changed, 90 insertions, 0 deletions
diff --git a/src/student-prod.ts b/src/student-prod.ts
new file mode 100644
index 0000000..24ac869
--- /dev/null
+++ b/src/student-prod.ts
@@ -0,0 +1,90 @@
+import type { Graduation } from "./graduation-common.ts";
+import { Student } from "./student-common.ts";
+import { getUserIconUrl, getCourseParticipantsUrl } from "./utils-prod.js"
+import { fetchGraduation } from "./graduation-prod.ts";
+
+declare module "./student-common.ts" {
+  interface Student {
+    getGraduation(): Promise<Graduation>;
+    getIconUrl(): Promise<string>;
+  }
+}
+Student.prototype.getGraduation = function () {
+   return fetchGraduation(this);
+};
+
+Student.prototype.getIconUrl = function () {
+   return getUserIconUrl(this.id);
+};
+
+// Cache the fetched students.
+let students: Array<Student> | null = null;
+
+const idRegex = /id=(\d+)/;
+async function _fetchStudents() {
+	const res = await fetch(getCourseParticipantsUrl());
+	const doc = new DOMParser().parseFromString(await res.text(), "text/html");
+	const table = doc.querySelector("tbody")!;
+	const fetchedStudents: Array<Student> = [];
+	table.querySelectorAll("tr").forEach(row => {
+		if (row.classList.contains("emptyrow"))
+			return;
+
+		const roleCell = row.querySelector(".c4")!;
+		// TODO(muhq): Is this locale dependent?
+		if (roleCell.innerHTML.includes("Lehrer")) {
+			return;
+		}
+
+		const nameCell = row.querySelector<HTMLElement>(".c1")!;
+		let name;
+		const c = nameCell.firstChild!.firstChild! as HTMLElement;
+		if (c.tagName == "SPAN")
+			name = c.title;
+		else
+			name = nameCell.innerText;
+
+		const profileUrl = nameCell.querySelector<HTMLAnchorElement>("a.aabtn")!.href;
+		const match = idRegex.exec(profileUrl);
+		if (match === null) {
+			console.error("Profile Regex did not match");
+			return;
+		}
+		const id = match[1];
+
+		const groupCell = row.querySelector(".c5")!;
+		const group = groupCell.querySelector<HTMLElement>("a.quickeditlink")!.textContent;
+
+		fetchedStudents.push(new Student(Number(id), name, group));
+	});
+	return fetchedStudents;
+}
+
+async function fetchStudents(idFilter?: number, nameFilter?: string, groupFilter?: string) {
+	if (students === null) {
+		const studentsPromise = _fetchStudents();
+		const storedStudents = localStorage.getItem("students");
+		if (storedStudents) {
+			studentsPromise.then((fetched) => localStorage.setItem("students", JSON.stringify(fetched)));
+			students = [];
+			for (const o of JSON.parse(storedStudents)) {
+				students.push(new Student(o.id, o.name, o.group));
+			}
+		} else {
+			students = await studentsPromise;
+			localStorage.setItem("students", JSON.stringify(students));
+		}
+	}
+
+	return students.filter((s) => 
+		(typeof idFilter === "undefined" || s.id === idFilter) &&
+		(typeof nameFilter === "undefined" || s.name.includes(nameFilter)) &&
+		(typeof groupFilter === "undefined" || s.group.includes(groupFilter)));
+}
+
+async function fetchStudent(idFilter: number, nameFilter: string, groupFilter: string) {
+	const students = await fetchStudents(idFilter, nameFilter, groupFilter);
+	return students[0];
+}
+
+export { Student, fetchStudents, fetchStudent };