增加比赛倒计时的 api

contest/views.py

@@ -7,6 +7,8 @@ from django.db import IntegrityError
 from django.utils import dateparse
 from django.db.models import Q, Sum
 from django.core.paginator import Paginator
+from django.utils.timezone import now
+
 from rest_framework.views import APIView
 
 from utils.shortcuts import (serializer_invalid_response, error_response,
@@ -454,3 +456,22 @@ def contest_rank_page(request, contest_id):
                    "auto_refresh": request.GET.get("auto_refresh", None) == "true",
                    "show_real_name": request.GET.get("show_real_name", None) == "true",
                    "real_time_rank": contest.real_time_rank})
+
+
+class ContestTimeAPIView(APIView):
+    """
+    获取比赛开始或者结束的倒计时，返回毫秒数字
+    """
+    def get(self, request):
+        t = request.GET.get("type", "start")
+        contest_id = request.GET.get("contest_id", -1)
+        try:
+            contest = Contest.objects.get(id=contest_id)
+        except Contest.DoesNotExist:
+            return error_response(u"比赛不存在")
+        if t == "start":
+            # 距离开始还有多长时间
+            return success_response(int((contest.start_time - now()).total_seconds() * 1000))
+        else:
+            # 距离结束还有多长时间
+            return success_response(int((contest.end_time - now()).total_seconds() * 1000))

oj/urls.py

@@ -8,7 +8,8 @@ from account.views import (UserLoginAPIView, UsernameCheckAPIView, UserRegisterA
 
 from announcement.views import AnnouncementAdminAPIView
 
-from contest.views import ContestAdminAPIView, ContestProblemAdminAPIView, ContestPasswordVerifyAPIView
+from contest.views import (ContestAdminAPIView, ContestProblemAdminAPIView,
+                           ContestPasswordVerifyAPIView, ContestTimeAPIView)
 
 from group.views import (GroupAdminAPIView, GroupMemberAdminAPIView,
                          JoinGroupAPIView, JoinGroupRequestAdminAPIView)
@@ -25,7 +26,6 @@ from contest_submission.views import contest_problem_my_submissions_list_page
 
 
 urlpatterns = [
-    url(r'^install/$', "install.views.install"),
     url("^$", "account.views.index_page", name="index_page"),
     url(r'^docs/', include('rest_framework_swagger.urls')),
     url(r'^admin/$', TemplateView.as_view(template_name="admin/admin.html"), name="admin_spa_page"),
@@ -117,4 +117,6 @@ urlpatterns = [
 
     url(r'^captcha/$', "utils.captcha.views.show_captcha", name="show_captcha"),
     url(r'^api/account_security_check/$', AccountSecurityAPIView.as_view(), name="account_security_check"),
+
+    url(r'^api/contest/time/$', ContestTimeAPIView.as_view(), name="contest_time_api_view"),
 ]