第一版提交，答题功能OK，题库管理待完善

api/controllers/userQuizController.ts

@@ -0,0 +1,78 @@
+import { Request, Response } from 'express';
+import { ExamTaskModel } from '../models/examTask';
+
+export class UserQuizController {
+  static async generateQuiz(req: Request, res: Response) {
+    try {
+      const { userId, subjectId, taskId } = req.body;
+
+      if (!userId) {
+        return res.status(400).json({
+          success: false,
+          message: '用户ID不能为空'
+        });
+      }
+
+      if (taskId) {
+        const result = await ExamTaskModel.generateQuizQuestions(taskId, userId);
+        res.json({
+          success: true,
+          data: {
+            questions: result.questions,
+            totalScore: result.totalScore,
+            timeLimit: result.timeLimitMinutes
+          }
+        });
+        return;
+      }
+
+      if (!subjectId) {
+        return res.status(400).json({
+          success: false,
+          message: 'subjectId或taskId必须提供其一'
+        });
+      }
+
+      const { QuestionModel, ExamSubjectModel } = await import('../models');
+      const subject = await ExamSubjectModel.findById(subjectId);
+      if (!subject) {
+        return res.status(404).json({
+          success: false,
+          message: '考试科目不存在'
+        });
+      }
+
+      const questions: Awaited<ReturnType<typeof QuestionModel.getRandomQuestions>> = [];
+
+      for (const [type, ratio] of Object.entries(subject.typeRatios)) {
+        if (ratio <= 0) continue;
+        const typeScore = Math.floor((ratio / 100) * subject.totalScore);
+        const avgScore = 10;
+        const count = Math.max(1, Math.round(typeScore / avgScore));
+
+        const categories = Object.entries(subject.categoryRatios)
+          .filter(([, r]) => r > 0)
+          .map(([c]) => c);
+
+        const qs = await QuestionModel.getRandomQuestions(type as any, count, categories);
+        questions.push(...qs);
+      }
+
+      const totalScore = questions.reduce((sum, q) => sum + q.score, 0);
+
+      res.json({
+        success: true,
+        data: {
+          questions,
+          totalScore,
+          timeLimit: subject.timeLimitMinutes
+        }
+      });
+    } catch (error: any) {
+      res.status(500).json({
+        success: false,
+        message: error.message || '生成试卷失败'
+      });
+    }
+  }
+}