# coding=utf-8 import json import datetime from django.utils.timezone import localtime from django.shortcuts import render from django.db import IntegrityError from django.utils import dateparse from django.db.models import Q from django.core.paginator import Paginator from rest_framework.views import APIView from utils.shortcuts import (serializer_invalid_response, error_response, success_response, paginate, rand_str, error_page) from account.models import REGULAR_USER, ADMIN, SUPER_ADMIN from account.decorators import login_required from group.models import Group from announcement.models import Announcement from .models import Contest, ContestProblem from .serializers import (CreateContestSerializer, ContestSerializer, EditContestSerializer, CreateContestProblemSerializer, ContestProblemSerializer, EditContestProblemSerializer, ContestPasswordVerifySerializer, EditContestProblemSerializer) class ContestAdminAPIView(APIView): def post(self, request): """ 比赛发布json api接口 --- request_serializer: CreateContestSerializer response_serializer: ContestSerializer """ serializer = CreateContestSerializer(data=request.data) if serializer.is_valid(): data = serializer.data groups = [] # 首先判断比赛的类型： 0 即为是小组赛，1 即为是无密码的公开赛，2 即为是有密码的公开赛 # 此时为有密码的公开赛，并且此时只能超级管理员才有权限此创建比赛 if data["contest_type"] in [1, 2]: if request.user.admin_type != SUPER_ADMIN: return error_response(u"只有超级管理员才可创建公开赛") if data["contest_type"] == 2: if not data["password"]: return error_response(u"此比赛为有密码的公开赛，密码不可为空") # 没有密码的公开赛 没有密码的小组赛 elif data["contest_type"] == 0: if request.user.admin_type == SUPER_ADMIN: groups = Group.objects.filter(id__in=data["groups"]) else: groups = Group.objects.filter(id__in=data["groups"], admin=request.user) if not groups.count(): return error_response(u"请至少选择一个小组") if data["start_time"] >= data["end_time"]: return error_response(u"比赛的开始时间不能晚于或等于比赛结束的时间") try: contest = Contest.objects.create(title=data["title"], description=data["description"], mode=data["mode"], contest_type=data["contest_type"], show_rank=data["show_rank"], password=data["password"], show_user_submission=data["show_user_submission"], start_time=dateparse.parse_datetime(data["start_time"]), end_time=dateparse.parse_datetime(data["end_time"]), created_by=request.user, visible=data["visible"]) except IntegrityError: return error_response(u"比赛名已经存在") contest.groups.add(*groups) return success_response(ContestSerializer(contest).data) else: return serializer_invalid_response(serializer) def put(self, request): """ 比赛编辑json api接口 --- request_serializer: EditContestSerializer response_serializer: ContestSerializer """ serializer = EditContestSerializer(data=request.data) if serializer.is_valid(): data = serializer.data groups = [] try: contest = Contest.objects.get(id=data["id"]) except Contest.DoesNotExist: return error_response(u"该比赛不存在！") try: contest = Contest.objects.get(title=data["title"]) if contest.id != data["id"]: return error_response(u"该比赛名称已经存在") except Contest.DoesNotExist: pass if data["contest_type"] in [1, 2]: if request.user.admin_type != SUPER_ADMIN: return error_response(u"只有超级管理员才可创建公开赛") if data["contest_type"] == 2: if not data["password"]: return error_response(u"此比赛为有密码的公开赛，密码不可为空") elif data["contest_type"] == 0: if request.user.admin_type == SUPER_ADMIN: groups = Group.objects.filter(id__in=data["groups"]) else: groups = Group.objects.filter(id__in=data["groups"], admin=request.user) if not groups.count(): return error_response(u"请至少选择一个小组") if data["start_time"] >= data["end_time"]: return error_response(u"比赛的开始时间不能晚于或等于比赛结束的时间") contest.title = data["title"] contest.description = data["description"] contest.mode = data["mode"] contest.contest_type = data["contest_type"] contest.show_rank = data["show_rank"] contest.show_user_submission = data["show_user_submission"] contest.start_time = dateparse.parse_datetime(data["start_time"]) contest.end_time = dateparse.parse_datetime(data["end_time"]) contest.visible = data["visible"] contest.password = data["password"] contest.save() contest.groups.clear() contest.groups.add(*groups) return success_response(ContestSerializer(contest).data) else: return serializer_invalid_response(serializer) def get(self, request): """ 比赛分页json api接口 --- response_serializer: ContestSerializer """ contest = Contest.objects.all().order_by("-last_updated_time") visible = request.GET.get("visible", None) if visible: contest = contest.filter(visible=(visible == "true")) keyword = request.GET.get("keyword", None) if keyword: contest = contest.filter(Q(title__contains=keyword) | Q(description__contains=keyword)) return paginate(request, contest, ContestSerializer) class ContestProblemAdminAPIView(APIView): def post(self, request): """ 比赛题目发布json api接口 --- request_serializer: CreateContestProblemSerializer response_serializer: ContestProblemSerializer """ serializer = CreateContestProblemSerializer(data=request.data) if serializer.is_valid(): data = serializer.data try: contest = Contest.objects.get(id=data["contest_id"]) except Contest.DoesNotExist: return error_response(u"比赛不存在") contest_problem = ContestProblem.objects.create(title=data["title"], description=data["description"], input_description=data["input_description"], output_description=data["output_description"], test_case_id=data["test_case_id"], samples=json.dumps(data["samples"]), time_limit=data["time_limit"], memory_limit=data["memory_limit"], created_by=request.user, hint=data["hint"], contest=contest, sort_index=data["sort_index"]) return success_response(ContestProblemSerializer(contest_problem).data) else: return serializer_invalid_response(serializer) def put(self, request): """ 比赛题目编辑json api接口 --- request_serializer: EditContestProblemSerializer response_serializer: ContestProblemSerializer """ serializer = EditContestProblemSerializer(data=request.data) if serializer.is_valid(): data = serializer.data try: contest_problem = ContestProblem.objects.get(id=data["id"]) except ContestProblem.DoesNotExist: return error_response(u"该比赛题目不存在！") contest_problem.title = data["title"] contest_problem.description = data["description"] contest_problem.input_description = data["input_description"] contest_problem.output_description = data["output_description"] contest_problem.test_case_id = data["test_case_id"] contest_problem.time_limit = data["time_limit"] contest_problem.memory_limit = data["memory_limit"] contest_problem.samples = json.dumps(data["samples"]) contest_problem.hint = data["hint"] contest_problem.visible = data["visible"] contest_problem.sort_index = data["sort_index"] contest_problem.save() return success_response(ContestProblemSerializer(contest_problem).data) else: return serializer_invalid_response(serializer) def get(self, request): """ 比赛题目分页json api接口 --- response_serializer: ContestProblemSerializer """ contest_problem_id = request.GET.get("contest_problem_id", None) if contest_problem_id: try: contest_problem = ContestProblem.objects.get(id=contest_problem_id) return success_response(ContestProblemSerializer(contest_problem).data) except ContestProblem.DoesNotExist: return error_response(u"比赛题目不存在") contest_problem = ContestProblem.objects.all().order_by("sort_index") visible = request.GET.get("visible", None) if visible: contest_problem = contest_problem.filter(visible=(visible == "true")) keyword = request.GET.get("keyword", None) if keyword: contest_problem = contest_problem.filter(Q(title__contains=keyword) | Q(description__contains=keyword)) return paginate(request, contest_problem, ContestProblemSerializer) class ContestPasswordVerifyAPIView(APIView): @login_required def post(self, request): serializer = ContestPasswordVerifySerializer(data=request.data) if serializer.is_valid(): data = request.data try: contest = Contest.objects.get(id=data["contest_id"], contest_type=2) except Contest.DoesNotExist: return error_response(u"密码错误") if data["password"] != contest.password: return error_response(u" 密码错误") else: print request.session.get("contests", None) if "contests" not in request.session: request.session["contests"] = [] request.session["contests"].append(int(data["contest_id"])) print request.session["contests"] return success_response(True) else: return serializer_invalid_response(serializer) def check_user_contest_permission(request, contest): # 有密码的公开赛 if contest.contest_type == 2: # 没有输入过密码 if contest.id not in request.session.get("contests", []): return {"result": False, "reason": "password_protect"} # 指定小组参加的 if contest.contest_type == 0: if not contest.groups.filter(id__in=request.user.group_set.all()).exists(): return {"result": False, "reason": "limited_group"} return {"result": True} @login_required def contest_page(request, contest_id): try: contest = Contest.objects.get(id=contest_id) except Contest.DoesNotExist: return error_page(request, u"比赛不存在") Contest.objects.filter(Q(contest_type__in=[1, 2]) | Q(groups__in=request.user.group_set.all())) result = check_user_contest_permission(request, contest) if not result["result"]: return render(request, "oj/contest/contest_no_privilege.html", {"contest": contest, "reason": result["reason"]}) return render(request, "oj/contest/contest_index.html", {"contest": contest}) def contest_list_page(request, page=1): # 正常情况 contests = Contest.objects.filter(visible=True) # 搜索的情况 keyword = request.GET.get("keyword", None) if keyword: contests = contests.filter(title__contains=keyword) # 筛选我能参加的比赛 join = request.GET.get("join", None) if join: contests = Contest.objects.filter(Q(contest_type__in=[1, 2]) | Q(groups__in=request.user.group_set.all())).\ filter(end_time__gt=datetime.datetime.now(), start_time__lt=datetime.datetime.now()) paginator = Paginator(contests, 20) try: current_page = paginator.page(int(page)) except Exception: return error_page(request, u"不存在的页码") previous_page = next_page = None try: previous_page = current_page.previous_page_number() except Exception: pass try: next_page = current_page.next_page_number() except Exception: pass # 右侧的公告列表 announcements = Announcement.objects.filter(is_global=True, visible=True).order_by("-create_time") # 系统当前时间 now = datetime.datetime.now() return render(request, "oj/contest/contest_list.html", {"contests": current_page, "page": int(page), "previous_page": previous_page, "next_page": next_page, "keyword": keyword, "announcements": announcements, "join": join, "now": now})