feat(classes): optimize teacher dashboard ui and implement grade management

src/modules/questions/actions.ts

@@ -9,10 +9,11 @@ import { revalidatePath } from "next/cache";
 import { createId } from "@paralleldrive/cuid2";
 import { and, eq } from "drizzle-orm";
 import { z } from "zod";
+import { getQuestions, type GetQuestionsParams } from "./data-access";
 
 async function getCurrentUser() {
   return {
-    id: "user_teacher_123",
+    id: "user_teacher_math",
     role: "teacher",
   };
 }
@@ -205,25 +206,27 @@ export async function deleteQuestionAction(
 ): Promise<ActionState<string>> {
   try {
     const user = await ensureTeacher();
-    const canEditAll = user.role === "admin";
+    const canDeleteAll = user.role === "admin";
 
-    const id = formData.get("id");
-    if (typeof id !== "string" || id.length === 0) {
-      return { success: false, message: "Missing question id" };
+    const questionId = formData.get("questionId");
+    if (typeof questionId !== "string") {
+      return { success: false, message: "Invalid question ID" };
     }
 
     await db.transaction(async (tx) => {
-      const [owned] = await tx
-        .select({ id: questions.id })
-        .from(questions)
-        .where(canEditAll ? eq(questions.id, id) : and(eq(questions.id, id), eq(questions.authorId, user.id)))
-        .limit(1);
+      const q = await tx.query.questions.findFirst({
+        where: eq(questions.id, questionId),
+      });
 
-      if (!owned) {
+      if (!q) {
+        throw new Error("Question not found");
+      }
+
+      if (!canDeleteAll && q.authorId !== user.id) {
         throw new Error("Unauthorized");
       }
 
-      await deleteQuestionRecursive(tx, id);
+      await deleteQuestionRecursive(tx, questionId);
     });
 
     revalidatePath("/teacher/questions");
@@ -233,6 +236,11 @@ export async function deleteQuestionAction(
     if (error instanceof Error) {
       return { success: false, message: error.message };
     }
-    return { success: false, message: "An unexpected error occurred" };
+    return { success: false, message: "Failed to delete question" };
   }
 }
+
+export async function getQuestionsAction(params: GetQuestionsParams) {
+  await ensureTeacher();
+  return await getQuestions(params);
+}