用户端页面构建完成---待测试

api/controllers/quizController.ts

@@ -190,9 +190,21 @@ export class QuizController {
         }
       });
     } catch (error: any) {
-      res.status(500).json({
+      const message = error?.message || '生成试卷失败';
+      const status = message.includes('不存在')
+        ? 404
+        : [
+            '用户ID不能为空',
+            'subjectId或taskId必须提供其一',
+            '当前时间不在任务有效范围内',
+            '用户未被分派到此任务',
+            '考试次数已用尽',
+          ].some((m) => message.includes(m))
+          ? 400
+          : 500;
+      res.status(status).json({
         success: false,
-        message: error.message || '生成试卷失败'
+        message,
       });
     }
   }
@@ -390,4 +402,4 @@ export class QuizController {
       });
     }
   }
-}
+}

api/models/examTask.ts

@@ -11,6 +11,15 @@ export interface ExamTask {
   selectionConfig?: string; // JSON string
 }
 
+export interface UserExamTask extends ExamTask {
+  subjectName: string;
+  totalScore: number;
+  timeLimitMinutes: number;
+  usedAttempts: number;
+  maxAttempts: number;
+  bestScore: number;
+}
+
 export interface ExamTaskUser {
   id: string;
   taskId: string;
@@ -558,6 +567,13 @@ export class ExamTaskModel {
     );
     if (!isAssigned) throw new Error('用户未被分派到此任务');
 
+    const attemptRow = await get(
+      `SELECT COUNT(*) as count FROM quiz_records WHERE user_id = ? AND task_id = ?`,
+      [userId, taskId],
+    );
+    const usedAttempts = Number(attemptRow?.count) || 0;
+    if (usedAttempts >= 3) throw new Error('考试次数已用尽');
+
     const subject = await import('./examSubject').then(({ ExamSubjectModel }) => ExamSubjectModel.findById(task.subjectId));
     if (!subject) throw new Error('科目不存在');
 
@@ -705,27 +721,48 @@ export class ExamTaskModel {
     };
   }
 
-  static async getUserTasks(userId: string): Promise<ExamTask[]> {
+  static async getUserTasks(userId: string): Promise<UserExamTask[]> {
     const now = new Date().toISOString();
     const rows = await all(`
-      SELECT t.*, s.name as subjectName, s.totalScore, s.timeLimitMinutes
+      SELECT 
+        t.id,
+        t.name,
+        t.subject_id as subjectId,
+        t.start_at as startAt,
+        t.end_at as endAt,
+        t.created_at as createdAt,
+        s.name as subjectName,
+        s.total_score as totalScore,
+        s.duration_minutes as timeLimitMinutes,
+        COALESCE(q.usedAttempts, 0) as usedAttempts,
+        3 as maxAttempts,
+        COALESCE(q.bestScore, 0) as bestScore
       FROM exam_tasks t
       INNER JOIN exam_task_users tu ON t.id = tu.task_id
       INNER JOIN exam_subjects s ON t.subject_id = s.id
-      WHERE tu.user_id = ? AND t.start_at <= ?
-      ORDER BY t.start_at DESC
-    `, [userId, now]);
+      LEFT JOIN (
+        SELECT task_id, COUNT(*) as usedAttempts, MAX(total_score) as bestScore
+        FROM quiz_records
+        WHERE user_id = ?
+        GROUP BY task_id
+      ) q ON q.task_id = t.id
+      WHERE tu.user_id = ? AND t.start_at <= ? AND t.end_at >= ?
+      ORDER BY t.start_at ASC, t.end_at ASC
+    `, [userId, userId, now, now]);
 
     return rows.map(row => ({
       id: row.id,
       name: row.name,
-      subjectId: row.subject_id,
-      startAt: row.start_at,
-      endAt: row.end_at,
-      createdAt: row.created_at,
+      subjectId: row.subjectId,
+      startAt: row.startAt,
+      endAt: row.endAt,
+      createdAt: row.createdAt,
       subjectName: row.subjectName,
-      totalScore: row.totalScore,
-      timeLimitMinutes: row.timeLimitMinutes
+      totalScore: Number(row.totalScore) || 0,
+      timeLimitMinutes: Number(row.timeLimitMinutes) || 0,
+      usedAttempts: Number(row.usedAttempts) || 0,
+      maxAttempts: Number(row.maxAttempts) || 3,
+      bestScore: Number(row.bestScore) || 0,
     }));
   }
 }