mobile app admin_base admin_contests admin_dashboard chat contest_detail exam_create exam_detail exam_grade exam_list profile themes

templates/exam_detail.html

@@ -242,6 +242,7 @@ const SCHEDULED_END = null;
 let currentIndex = 0;
 let answers = {};
 let tabSwitchCount = 0;
+let examSubmitted = false;  // 提交成功后允许离开
 
 // ===== 图片上传 =====
 function examUpload(qid) {
@@ -506,6 +507,9 @@ function doSubmit() {
         body: JSON.stringify({answers})
     }).then(r => r.json()).then(data => {
         if (data.success) {
+            examSubmitted = true;
+            // 退出考试状态，通知好友
+            fetch(`/api/exams/${EXAM_ID}/exit`, { method: 'POST' }).catch(() => {});
             // 清除本地存储
             localStorage.removeItem(STORAGE_KEY);
             localStorage.removeItem(TIMER_KEY);
@@ -523,17 +527,31 @@ function doSubmit() {
     });
 }
 
+// 进入考试：标记状态并通知好友
+fetch(`/api/exams/${EXAM_ID}/enter`, { method: 'POST' }).catch(() => {});
+
+// 禁止中途退出：拦截返回按钮
+history.pushState(null, '', location.href);
+window.addEventListener('popstate', (e) => {
+    if (!examSubmitted) {
+        history.pushState(null, '', location.href);
+        alert('考试进行中，请勿离开！提交前无法退出。');
+    }
+});
+
+// 离开页面提醒（提交成功后允许离开）
+window.addEventListener('beforeunload', (e) => {
+    if (!examSubmitted) {
+        e.preventDefault();
+        e.returnValue = '';
+    }
+});
+
 // 初始化
 initAnswers();
 initTimer();
 initTabDetection();
 showQuestion(0);
-
-// 离开页面提醒
-window.addEventListener('beforeunload', (e) => {
-    e.preventDefault();
-    e.returnValue = '';
-});
 </script>
 {% endif %}
 {% endblock %}