统计面板继续迭代

api/controllers/adminController.ts

@@ -2,6 +2,12 @@ import { Request, Response } from 'express';
 import { SystemConfigModel } from '../models';
 import { query } from '../database';
 
+const toPositiveInt = (value: unknown, defaultValue: number) => {
+  const n = Number(value);
+  if (!Number.isFinite(n) || n <= 0) return defaultValue;
+  return Math.floor(n);
+};
+
 export class AdminController {
   // 管理员登录
   static async login(req: Request, res: Response) {
@@ -127,6 +133,125 @@ export class AdminController {
     }
   }
 
+  static async getHistoryTaskStats(req: Request, res: Response) {
+    try {
+      const page = toPositiveInt(req.query.page, 1);
+      const limit = toPositiveInt(req.query.limit, 5);
+
+      const { ExamTaskModel } = await import('../models/examTask');
+      const result = await ExamTaskModel.getHistoryTasksWithStatsPaged(page, limit);
+
+      res.json({
+        success: true,
+        data: result.data,
+        pagination: {
+          page,
+          limit,
+          total: result.total,
+          pages: Math.ceil(result.total / limit),
+        },
+      });
+    } catch (error: any) {
+      console.error('获取历史任务统计失败:', error);
+      res.status(500).json({
+        success: false,
+        message: error.message || '获取历史任务统计失败',
+      });
+    }
+  }
+
+  static async getUpcomingTaskStats(req: Request, res: Response) {
+    try {
+      const page = toPositiveInt(req.query.page, 1);
+      const limit = toPositiveInt(req.query.limit, 5);
+
+      const { ExamTaskModel } = await import('../models/examTask');
+      const result = await ExamTaskModel.getUpcomingTasksWithStatsPaged(page, limit);
+
+      res.json({
+        success: true,
+        data: result.data,
+        pagination: {
+          page,
+          limit,
+          total: result.total,
+          pages: Math.ceil(result.total / limit),
+        },
+      });
+    } catch (error: any) {
+      console.error('获取未开始任务统计失败:', error);
+      res.status(500).json({
+        success: false,
+        message: error.message || '获取未开始任务统计失败',
+      });
+    }
+  }
+
+  static async getDashboardOverview(req: Request, res: Response) {
+    try {
+      const { QuizModel } = await import('../models');
+      const statistics = await QuizModel.getStatistics();
+
+      const now = new Date().toISOString();
+
+      const [categoryRows, activeSubjectRow, statusRow] = await Promise.all([
+        query(
+          `
+          SELECT 
+            COALESCE(category, '未分类') as category,
+            COUNT(*) as count
+          FROM questions
+          GROUP BY COALESCE(category, '未分类')
+          ORDER BY count DESC
+        `,
+        ),
+        query(
+          `
+          SELECT COUNT(DISTINCT subject_id) as total
+          FROM exam_tasks
+          WHERE start_at <= ? AND end_at >= ?
+        `,
+          [now, now],
+        ).then((rows: any[]) => rows[0]),
+        query(
+          `
+          SELECT 
+            SUM(CASE WHEN end_at < ? THEN 1 ELSE 0 END) as completed,
+            SUM(CASE WHEN start_at <= ? AND end_at >= ? THEN 1 ELSE 0 END) as ongoing,
+            SUM(CASE WHEN start_at > ? THEN 1 ELSE 0 END) as notStarted
+          FROM exam_tasks
+        `,
+          [now, now, now, now],
+        ).then((rows: any[]) => rows[0]),
+      ]);
+
+      const questionCategoryStats = (categoryRows as any[]).map((r) => ({
+        category: r.category,
+        count: Number(r.count) || 0,
+      }));
+
+      res.json({
+        success: true,
+        data: {
+          totalUsers: statistics.totalUsers,
+          activeSubjectCount: Number(activeSubjectRow?.total) || 0,
+          questionCategoryStats,
+          taskStatusDistribution: {
+            completed: Number(statusRow?.completed) || 0,
+            ongoing: Number(statusRow?.ongoing) || 0,
+            notStarted: Number(statusRow?.notStarted) || 0,
+          },
+        },
+      });
+    } catch (error: any) {
+      console.error('获取仪表盘概览失败:', error);
+      res.status(500).json({
+        success: false,
+        message: error.message || '获取仪表盘概览失败',
+      });
+    }
+  }
+
   static async getUserStats(req: Request, res: Response) {
     try {
       const rows = await query(