Update lottery.html

lottery.html

@@ -64,12 +64,8 @@
 
     <script>
         const urlParams = new URLSearchParams(window.location.search);
-        let name = urlParams.get('name');
+        let student_name = urlParams.get('student_name');
-
+        let student_id = urlParams.get('student_id');
-        // 如果 URL 中没有 name 参数，尝试从 localStorage 获取
-        if (!name) {
-            name = localStorage.getItem('currentUserName');
-        }
     
         const pointsDisplay = document.querySelector('#pointsDisplay');
         const startLotteryButton = document.querySelector('#startLotteryButton'); 
@@ -82,54 +78,123 @@
             return new Promise(resolve => setTimeout(resolve, d));
         }
     
-        // 获取该用户的积分
+        // 全局变量，用于存储用户积分
-        let userPoints = parseInt(localStorage.getItem(name)) || 0;
+        let userPoints = null;
-        pointsDisplay.textContent = `${name} 的当前积分: ${userPoints}`;
+    
+        // 获取该用户的分数
+        const fetchStudentScore = async (student_id) => {
+    try {
+        const response = await fetch('http://localhost:3000/api/get-score', {
+            method: 'POST', // 使用 POST 方法
+            headers: {
+                'Content-Type': 'application/json', // 设置请求体的内容类型
+            },
+            body: JSON.stringify({ student_id }), // 将 student_id 放入请求体
+        });
+
+        if (!response.ok) {
+            alert('分数获取失败');
+            return null; // 返回 null 表示获取失败
+        }
+
+        // 直接返回响应体中的数字
+        const data = await response.json(); // 直接解析为 JSON
+        const score  = data.score;
+        return score; // 返回数字
+    } catch (error) {
+        alert('网络请求失败');
+        return null; // 返回 null 表示获取失败
+    }
+};
+
+    
+        // 更新用户分数
+        async function updateScore(student_id, points) {
+    try {
+        const response = await fetch('http://localhost:3000/api/update-score', {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+            },
+            body: JSON.stringify({ student_id, points }),
+        });
+
+        if (!response.ok) {
+            throw new Error('网络响应不正常');
+        }
+
+        // 使用 text() 解析响应，得到字符串形式的分数
+        const data = await response.text(); 
+        let score = Number(data); // 转换为数字
+        return score; // 返回数字
+    } catch (error) {
+        console.error('分数更新失败:', error);
+        return null; // 返回 null 表示更新失败
+    }
+}
+
+    
+        // 初始化函数，用于设置用户积分
+        async function init() {
+            userPoints = await fetchStudentScore(student_id); // 获取分数并存储到全局变量
+            pointsDisplay.textContent = `${student_name} 的当前积分: ${userPoints}`;
+        }
+    
+        // 执行初始化函数
+        init();
     
         // 设置返回按钮的 URL
         backButton.onclick = () => {
             loadingIndicator.style.display = 'block'; // 显示加载提示
-            window.location.href = `choice.html?name=${encodeURIComponent(name)}`;
+            window.location.href = `choice.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
         };
     
-        // 抽奖逻辑
+        // 开始抽奖
         startLotteryButton.addEventListener('click', async () => {
-            if (userPoints >= 20) {
+            if (userPoints >= 2) {
-                userPoints -= 20;  // 每次抽奖消耗 20 分
+                userPoints = await updateScore(student_id, -2); // 积分-2
-                localStorage.setItem(name, userPoints);  // 保存更新后的积分
+    
-                pointsDisplay.textContent = `${name} 的当前积分: ${userPoints}`;
+                pointsDisplay.textContent = `${student_name} 的当前积分: ${userPoints}`;
     
                 // 随机选择奖品
-                const prizes = ["跳过权", "再来一次", "什么也没有发生", "加30积分且跳过"];
+                const prizes = ["跳过权", "再来一次", "什么也没有发生", "加3积分且跳过"];
                 const randomPrize = prizes[Math.floor(Math.random() * prizes.length)];
                 resultDisplay.textContent = `你赢得了: ${randomPrize}`;
     
                 // 等待 2 秒以展示结果
-                await sleep(2000);
+                await new Promise(resolve => setTimeout(resolve, 2000));
                 loadingIndicator.style.display = 'block'; // 显示加载提示
     
                 if (randomPrize === '跳过权') {
-                    await sleep(1000);
+                    await sleep(2000);
-                    window.location.href = `select.html?name=${encodeURIComponent(name)}`;
+                    window.location.href = `select.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
-                } else if (randomPrize === '再来一次') {
-                    userPoints += 20;
-                    localStorage.setItem(name, userPoints);
-                } else if (randomPrize === '什么也没有发生') {
-                    await sleep(1000);
-                    window.location.href = `answer.html?name=${encodeURIComponent(name)}`;
-                } else if (randomPrize === '加30积分且跳过') {
-                    userPoints += 30;
-                    localStorage.setItem(name, userPoints);
-                    await sleep(1000);
-                    window.location.href = `select.html?name=${encodeURIComponent(name)}`;
                 } 
+
+                else if (randomPrize === '再来一次') {
+                    userPoints = await updateScore(student_id, 2); // 积分返回2
+                    await sleep(2000);
+                    window.location.href = `lottery.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+                } 
+
+                else if (randomPrize === '什么也没有发生') {
+                    await sleep(2000);
+                    window.location.href = `answer.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+                } 
+
+                else if (randomPrize === '加3积分且跳过') {
+                    userPoints = await updateScore(student_id, 3); // 积分+3
+                    await sleep(2000);
+                    window.location.href = `select.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
+                }
+                
             } else {
-                resultDisplay.textContent = "积分不足，无法抽奖！";
+                resultDisplay.textContent = "积分不足，无法抽奖！返回回答问题";
                 loadingIndicator.style.display = 'block'; // 显示加载提示
-                await sleep(1000);
+                await sleep(2000);
-                window.location.href = `answer.html?name=${encodeURIComponent(name)}`;
+                window.location.href = `answer.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
             }
         });
     </script>
+    
 </body>
 </html>