feat: class join req controller + fixes tests

frontend/src/controllers/base-controller.ts

@@ -28,12 +28,17 @@ export class BaseController {
         return res.json();
     }
 
-    protected async post<T>(path: string, body: unknown): Promise<T> {
-        const res = await fetch(`${this.baseUrl}${path}`, {
+    protected async post<T>(path: string, body?: unknown): Promise<T> {
+        const options: RequestInit = {
             method: "POST",
             headers: { "Content-Type": "application/json" },
-            body: JSON.stringify(body),
-        });
+        };
+
+        if (body !== undefined) {
+            options.body = JSON.stringify(body);
+        }
+
+        const res = await fetch(`${this.baseUrl}${path}`, options);
 
         if (!res.ok) {
             const errorData = await res.json().catch(() => ({}));

frontend/src/controllers/students.ts

@@ -2,7 +2,7 @@ import { BaseController } from "@/controllers/base-controller.ts";
 
 export class StudentController extends BaseController {
     constructor() {
-        super("students");
+        super("student");
     }
 
     getAll(full = true) {
@@ -10,15 +10,15 @@ export class StudentController extends BaseController {
     }
 
     getByUsername(username: string) {
-        return this.get<any>(`/${username}`);
+        return this.get<{ student: any }>(`/${username}`);
     }
 
     createStudent(data: any) {
-        return this.post<any>("/", data);
+        return this.post<{ student: any }>("/", data);
     }
 
     deleteStudent(username: string) {
-        return this.delete<any>(`/${username}`);
+        return this.delete<{ student: any }>(`/${username}`);
     }
 
     getClasses(username: string, full = true) {
@@ -40,4 +40,16 @@ export class StudentController extends BaseController {
     getQuestions(username: string, full = true) {
         return this.get<{ questions: any[] }>(`/${username}/questions`, { full });
     }
+
+    getJoinRequests(username: string) {
+        return this.get<{ requests: any[] }>(`/${username}/joinRequests`);
+    }
+
+    createJoinRequest(username: string, classId: string) {
+        return this.post<any>(`/${username}/joinRequests/${classId}`);
+    }
+
+    deleteJoinRequest(username: string, classId: string) {
+        return this.delete<any>(`/${username}/joinRequests/${classId}`);
+    }
 }

frontend/src/controllers/teachers.ts

@@ -2,7 +2,7 @@ import { BaseController } from "@/controllers/base-controller.ts";
 
 export class TeacherController extends BaseController {
     constructor() {
-        super("teachers");
+        super("teacher");
     }
 
     getAll(full = false) {