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祀梦
243
backend/routes/teacher.js
Normal file
243
backend/routes/teacher.js
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const express = require('express');
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const router = express.Router();
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const db = require('../config/database');
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const { requireAuth, requireRole } = require('../middleware/auth');
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// 获取教师教授的课程
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router.get('/courses', requireAuth, requireRole(['teacher']), async (req, res) => {
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try {
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const teacherId = req.session.user.id;
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const courses = await db.pool.execute(
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'SELECT * FROM courses WHERE teacher_id = ? ORDER BY course_code',
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[teacherId]
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);
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res.json({
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success: true,
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courses
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});
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} catch (error) {
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console.error('获取课程错误:', error);
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res.status(500).json({
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success: false,
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message: '服务器错误'
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});
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}
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});
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// 录入成绩
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router.post('/grades', requireAuth, requireRole(['teacher']), async (req, res) => {
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try {
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const teacherId = req.session.user.id;
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const { studentId, courseId, score, examDate, remark } = req.body;
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// 验证输入
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if (!studentId || !courseId || score === undefined) {
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return res.status(400).json({
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success: false,
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message: '请填写必填字段'
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});
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}
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// 检查学生和课程是否存在
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const students = await db.pool.execute(
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'SELECT id FROM students WHERE student_id = ?',
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[studentId]
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);
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if (students[0].length === 0) {
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return res.status(404).json({
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success: false,
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message: '学生不存在'
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});
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}
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// 计算绩点和等级
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const numericScore = parseFloat(score);
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let gradePoint = 0;
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let gradeLevel = 'F';
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if (numericScore >= 90) {
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gradePoint = 4.0; gradeLevel = 'A';
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} else if (numericScore >= 80) {
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gradePoint = 3.0; gradeLevel = 'B';
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} else if (numericScore >= 70) {
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gradePoint = 2.0; gradeLevel = 'C';
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} else if (numericScore >= 60) {
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gradePoint = 1.0; gradeLevel = 'D';
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}
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// 插入成绩
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const result = await db.pool.execute(
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`INSERT INTO scores (student_id, course_id, teacher_id, score,
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grade_point, grade_level, exam_date, remark)
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VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
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[students[0][0].id, courseId, teacherId, numericScore,
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gradePoint, gradeLevel, examDate, remark]
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);
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res.json({
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success: true,
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message: '成绩录入成功',
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gradeId: result.insertId
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});
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} catch (error) {
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console.error('录入成绩错误:', error);
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// 处理唯一约束错误
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if (error.code === 'ER_DUP_ENTRY') {
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return res.status(400).json({
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success: false,
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message: '该学生此课程成绩已存在'
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});
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}
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res.status(500).json({
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success: false,
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message: '服务器错误'
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});
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}
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});
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// 查询成绩（按班级、课程）
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router.get('/grades', requireAuth, requireRole(['teacher']), async (req, res) => {
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try {
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const { class_name, course_id } = req.query;
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const teacherId = req.session.user.id;
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let query = `
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SELECT sc.*, st.student_id, st.full_name, st.class_name,
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c.course_code, c.course_name, c.credit
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FROM scores sc
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JOIN students st ON sc.student_id = st.id
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JOIN courses c ON sc.course_id = c.id
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WHERE sc.teacher_id = ?
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`;
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const params = [teacherId];
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if (class_name) {
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query += ' AND st.class_name = ?';
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params.push(class_name);
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}
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if (course_id) {
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query += ' AND sc.course_id = ?';
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params.push(course_id);
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}
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query += ' ORDER BY st.class_name, st.student_id, sc.exam_date DESC';
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const grades = await db.pool.execute(query, params);
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res.json({
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success: true,
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grades
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});
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} catch (error) {
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console.error('查询成绩错误:', error);
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res.status(500).json({
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success: false,
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message: '服务器错误'
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});
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}
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});
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// 更新成绩
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router.put('/grades/:id', requireAuth, requireRole(['teacher']), async (req, res) => {
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try {
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const gradeId = req.params.id;
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const teacherId = req.session.user.id;
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const { score, examDate, remark } = req.body;
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// 验证成绩是否存在且属于该教师
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const existingGrades = await db.pool.execute(
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'SELECT id FROM scores WHERE id = ? AND teacher_id = ?',
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[gradeId, teacherId]
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);
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if (existingGrades[0].length === 0) {
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return res.status(404).json({
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success: false,
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message: '成绩不存在或无权修改'
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});
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}
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// 计算新的绩点和等级
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const numericScore = parseFloat(score);
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let gradePoint = 0;
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let gradeLevel = 'F';
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if (numericScore >= 90) {
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gradePoint = 4.0; gradeLevel = 'A';
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} else if (numericScore >= 80) {
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gradePoint = 3.0; gradeLevel = 'B';
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} else if (numericScore >= 70) {
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gradePoint = 2.0; gradeLevel = 'C';
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} else if (numericScore >= 60) {
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gradePoint = 1.0; gradeLevel = 'D';
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}
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// 更新成绩
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await db.pool.execute(
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`UPDATE scores SET score = ?, grade_point = ?, grade_level = ?,
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exam_date = ?, remark = ?, updated_at = CURRENT_TIMESTAMP
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WHERE id = ?`,
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[numericScore, gradePoint, gradeLevel, examDate, remark, gradeId]
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);
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res.json({
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success: true,
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message: '成绩更新成功'
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});
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} catch (error) {
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console.error('更新成绩错误:', error);
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res.status(500).json({
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success: false,
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message: '服务器错误'
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});
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}
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});
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// 删除成绩
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router.delete('/grades/:id', requireAuth, requireRole(['teacher']), async (req, res) => {
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try {
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const gradeId = req.params.id;
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const teacherId = req.session.user.id;
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// 验证成绩是否存在且属于该教师
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const existingGrades = await db.pool.execute(
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'SELECT id FROM scores WHERE id = ? AND teacher_id = ?',
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[gradeId, teacherId]
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);
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if (existingGrades[0].length === 0) {
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return res.status(404).json({
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success: false,
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message: '成绩不存在或无权删除'
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});
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}
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// 删除成绩
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await db.pool.execute('DELETE FROM scores WHERE id = ?', [gradeId]);
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res.json({
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success: true,
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message: '成绩删除成功'
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});
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} catch (error) {
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console.error('删除成绩错误:', error);
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res.status(500).json({
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success: false,
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message: '服务器错误'
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});
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}
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});
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module.exports = router;
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