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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>课堂点名</title>
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<style>
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body {
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font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
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background: linear-gradient(135deg, #89f7fe, #66a6ff);
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height: 100vh;
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margin: 0;
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display: flex;
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justify-content: center;
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align-items: center;
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color: #333;
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}
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.container {
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text-align: center;
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background: rgba(255, 255, 255, 0.85);
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padding: 40px;
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border-radius: 20px;
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box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
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backdrop-filter: blur(8.5px);
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-webkit-backdrop-filter: blur(8.5px);
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border: 1px solid rgba(255, 255, 255, 0.18);
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}
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h1 {
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margin-bottom: 30px;
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font-size: 2em;
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color: #ff5722;
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}
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#studentNameDisplay {
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font-size: 1.8em;
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margin-bottom: 30px;
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min-height: 50px;
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}
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.button-group {
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display: flex;
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justify-content: center;
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gap: 20px;
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flex-wrap: wrap;
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}
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button {
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padding: 12px 25px;
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font-size: 1em;
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border: none;
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border-radius: 30px;
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background-color: #4CAF50;
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color: white;
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cursor: pointer;
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transition: transform 0.2s, background-color 0.3s;
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box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
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}
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button:hover {
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background-color: #45a049;
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transform: scale(1.05);
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box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
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}
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#absentButton {
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background-color: #f44336;
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}
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#absentButton:hover {
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background-color: #e53935;
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}
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.back-button {
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margin-top: 30px;
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background-color: #2196F3;
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}
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.back-button:hover {
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background-color: #1e88e5;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<h1>课堂点名</h1>
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<div id="studentNameDisplay">请点击“随机点名”按钮</div>
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<div class="button-group">
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<button id="startAttendance">随机点名</button>
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<button id="presentButton" style="display:none;">到</button>
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<button id="absentButton" style="display:none;">没到</button>
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</div>
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<button class="back-button" onclick="window.location.href='index.html'">返回主页面</button>
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</div>
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<script>
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const studentNameDisplay = document.getElementById('studentNameDisplay');
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const startAttendanceButton = document.getElementById('startAttendance');
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const presentButton = document.getElementById('presentButton');
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const absentButton = document.getElementById('absentButton');
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let currentStudent = null;
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// 随机点名按钮点击事件
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startAttendanceButton.addEventListener('click', async () => {
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try {
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// 向后端请求随机学生
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const response = await fetch('http://localhost:3000/api/random-call');
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const data = await response.json();
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if (data.student) {
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currentStudent = data.student;
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studentNameDisplay.textContent = `当前学生: ${currentStudent.student_name}`;
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presentButton.style.display = 'inline-block';
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absentButton.style.display = 'inline-block';
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startAttendanceButton.disabled = true;
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} else {
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alert('无法获取学生数据');
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}
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} catch (error) {
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console.error('获取学生失败', error);
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alert('获取学生失败，请重试');
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}
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});
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// 到场按钮点击事件
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presentButton.addEventListener('click', async () => {
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if (currentStudent) {
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await updatePoints(currentStudent.student_id, 1); // 到场加1分
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alert(`${currentStudent.student_name} 已到，加1分`);
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resetAttendance();
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}
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});
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// 没到按钮点击事件
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absentButton.addEventListener('click', async () => {
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if (currentStudent) {
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await updatePoints(currentStudent.student_id, -1); // 未到减2分
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alert(`${currentStudent.student_name} 未到，减1分`);
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resetAttendance();
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}
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});
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// 更新分数的函数
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async function updatePoints(studentId, points) {
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try {
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// 发送请求更新分数
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const response = await fetch('http://localhost:3000/api/update-score', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify({ student_id: studentId, points }),
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});
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if (!response.ok) {
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throw new Error('更新分数失败');
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}
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} catch (error) {
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console.error('更新分数失败', error);
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alert('更新分数失败，请重试');
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}
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}
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// 重置点名的函数
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function resetAttendance() {
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studentNameDisplay.textContent = '请点击“随机点名”按钮';
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presentButton.style.display = 'none';
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absentButton.style.display = 'none';
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startAttendanceButton.disabled = false;
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}
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</script>
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</body>
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</html>
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