# coding=utf-8 import json import datetime import redis from django.shortcuts import render 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 django.conf import settings from rest_framework.views import APIView from utils.shortcuts import (serializer_invalid_response, error_response, success_response, paginate, error_page, paginate_data) from account.models import SUPER_ADMIN, User from account.decorators import login_required from group.models import Group from utils.cache import get_cache_redis from submission.models import Submission from .models import (Contest, ContestProblem, CONTEST_ENDED, CONTEST_NOT_START, CONTEST_UNDERWAY, ContestRank) from .models import GROUP_CONTEST, PUBLIC_CONTEST, PASSWORD_PROTECTED_CONTEST from .decorators import check_user_contest_permission from .serializers import (CreateContestSerializer, ContestSerializer, EditContestSerializer, CreateContestProblemSerializer, ContestProblemSerializer, 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(GROUP_CONTEST)，1 即为是无密码的公开赛(PUBLIC_CONTEST)， # 2 即为是有密码的公开赛(PASSWORD_PUBLIC_CONTEST) # 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 [PUBLIC_CONTEST, PASSWORD_PROTECTED_CONTEST]: 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"] == PASSWORD_PROTECTED_CONTEST: 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"] == GROUP_CONTEST: 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"比赛的开始时间必须早于比赛结束的时间") try: contest = Contest.objects.create(title=data["title"], description=data["description"], contest_type=data["contest_type"], real_time_rank=data["real_time_rank"], password=data["password"], 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: # 超级管理员可以编辑所有的 contest = Contest.objects.get(id=data["id"]) if request.user.admin_type != SUPER_ADMIN: contest = contest.get(created_by=request.user) 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 [PUBLIC_CONTEST, PASSWORD_PROTECTED_CONTEST]: 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"] == PASSWORD_PROTECTED_CONTEST: 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"] == GROUP_CONTEST: 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"比赛的开始时间必须早于比赛结束的时间") # 之前是封榜，现在要开放，需要清除缓存 if contest.real_time_rank == False and data["real_time_rank"] == True: r = get_cache_redis() cache_key = str(contest.id) + "_rank_cache" r.delete(cache_key) contest.title = data["title"] contest.description = data["description"] contest.contest_type = data["contest_type"] contest.real_time_rank = data["real_time_rank"] 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 """ if request.user.admin_type == SUPER_ADMIN: contest = Contest.objects.all().order_by("-create_time") else: contest = Contest.objects.filter(created_by=request.user).order_by("-create_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"]) if request.user.admin_type != SUPER_ADMIN: contest = contest.get(created_by=request.user) 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"], score=data["score"]) 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 = Contest.objects.get(id=contest_problem.contest_id) if request.user.admin_type != SUPER_ADMIN and contest.created_by != request.user: return error_response(u"比赛不存在") 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.score = data["score"] contest_problem.last_update_time = now() 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) if request.user.admin_type != SUPER_ADMIN: contest_problem = contest_problem.get(created_by=request.user) return success_response(ContestProblemSerializer(contest_problem).data) except ContestProblem.DoesNotExist: return error_response(u"比赛题目不存在") contest_problems = ContestProblem.objects.all().order_by("sort_index") if request.user.admin_type != SUPER_ADMIN: contest_problems = contest_problems.filter(created_by=request.user).order_by("sort_index") visible = request.GET.get("visible", None) if visible: contest_problems = contest_problems.filter(visible=(visible == "true")) keyword = request.GET.get("keyword", None) if keyword: contest_problems = contest_problems.filter(Q(title__contains=keyword) | Q(description__contains=keyword)) contest_id = request.GET.get("contest_id", None) if contest_id: contest_problems = contest_problems.filter(contest__id=contest_id).order_by("sort_index") return paginate(request, contest_problems, 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=PASSWORD_PROTECTED_CONTEST) except Contest.DoesNotExist: return error_response(u"比赛不存在") if data["password"] != contest.password: return error_response(u"密码错误") else: if "contests" not in request.session: request.session["contests"] = [] request.session["contests"].append(int(data["contest_id"])) # https://docs.djangoproject.com/en/dev/topics/http/sessions/#when-sessions-are-saved request.session.modified = True return success_response(True) else: return serializer_invalid_response(serializer) @check_user_contest_permission def contest_page(request, contest_id): """ 单个比赛的详情页 """ contest = Contest.objects.get(id=contest_id) return render(request, "oj/contest/contest_index.html", {"contest": contest}) @check_user_contest_permission def contest_problem_page(request, contest_id, contest_problem_id): """ 单个比赛题目的详情页 """ contest = Contest.objects.get(id=contest_id) try: problem = ContestProblem.objects.get(id=contest_problem_id, visible=True) except ContestProblem.DoesNotExist: return error_page(request, u"比赛题目不存在") warning = u"您已经提交过本题的正确答案，重复提交可能造成时间累计。" show_warning = False try: rank = ContestRank.objects.get(user=request.user, contest=contest) # 提示已经 ac 过这道题了 show_warning = rank.submission_info.get(str(problem.id), {"is_ac": False})["is_ac"] except ContestRank.DoesNotExist: pass # 已经结束 if contest.status == CONTEST_ENDED: show_warning = True warning = u"比赛已经结束" elif contest.status == CONTEST_NOT_START: show_warning = True warning = u"比赛没有开始，您是管理员，可以提交和测试题目，但是目前的提交不会计入排名。" show_submit_code_area = False if contest.status == CONTEST_UNDERWAY or \ request.user.admin_type == SUPER_ADMIN or \ request.user == contest.created_by: show_submit_code_area = True return render(request, "oj/problem/contest_problem.html", {"problem": problem, "contest": contest, "samples": json.loads(problem.samples), "show_warning": show_warning, "warning": warning, "show_submit_code_area": show_submit_code_area}) @check_user_contest_permission def contest_problems_list_page(request, contest_id): """ 比赛所有题目的列表页 """ contest = Contest.objects.get(id=contest_id) contest_problems = ContestProblem.objects.filter(contest=contest).select_related("contest").order_by("sort_index") return render(request, "oj/contest/contest_problems_list.html", {"contest_problems": contest_problems, "contest": {"id": contest_id}}) def contest_list_page(request, page=1): """ 所有比赛的列表页 """ # 正常情况 contests = Contest.objects.filter(visible=True).order_by("-create_time") # 搜索的情况 keyword = request.GET.get("keyword", None) if keyword: contests = contests.filter(Q(title__contains=keyword) | Q(description__contains=keyword)) # 筛选我能参加的比赛 join = request.GET.get("join", None) if request.user.is_authenticated and join: contests = contests.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 return render(request, "oj/contest/contest_list.html", {"contests": current_page, "page": int(page), "previous_page": previous_page, "next_page": next_page, "keyword": keyword, "join": join}) @check_user_contest_permission def contest_rank_page(request, contest_id): contest = Contest.objects.get(id=contest_id) contest_problems = ContestProblem.objects.filter(contest=contest).order_by("sort_index") r = get_cache_redis() cache_key = str(contest_id) + "_rank_cache" rank = r.get(cache_key) if not rank: rank = ContestRank.objects.filter(contest_id=contest_id).\ select_related("user").\ order_by("-total_ac_number", "total_time").\ values("id", "user__id", "user__username", "user__real_name", "contest_id", "submission_info", "total_submission_number", "total_ac_number", "total_time") r.set(cache_key, json.dumps([dict(item) for item in rank])) else: rank = json.loads(rank) try: paging_rank = paginate_data(request, rank, None) if request.GET.get("paging", None): rank = paging_rank["results"] else: rank = paging_rank except Exception as e: return error_page(request, e.message) if request.GET.get("paging", None): paging_info = paging_rank paging_info["offset"] = paging_rank["page_size"] * (int(paging_rank["current_page"]) - 1) else: paging_info = {"previous_page": None, "next_page": None, "count": 0, "total_page": 0, "offset": 0} return render(request, "oj/contest/contest_rank.html", {"rank": rank, "contest": contest, "contest_problems": contest_problems, "paging_info": paging_info, "auto_refresh": request.GET.get("auto_refresh", None) == "true", "show_real_name": request.GET.get("show_real_name", None) == "true",}) 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): 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") return success_response({"start": int((contest.start_time - now()).total_seconds() * 1000), "end": int((contest.end_time - now()).total_seconds() * 1000), "status": contest.status}) @login_required def contest_problem_my_submissions_list_page(request, contest_id, contest_problem_id): """ 我比赛单个题目的所有提交列表 """ try: Contest.objects.get(id=contest_id) except Contest.DoesNotExist: return error_page(request, u"比赛不存在") try: contest_problem = ContestProblem.objects.get(id=contest_problem_id, visible=True) except ContestProblem.DoesNotExist: return error_page(request, u"比赛问题不存在") submissions = Submission.objects.filter(user_id=request.user.id, problem_id=contest_problem.id).\ order_by("-create_time").\ values("id", "result", "create_time", "accepted_answer_time", "language") return render(request, "oj/submission/problem_my_submissions_list.html", {"submissions": submissions, "problem": contest_problem}) @check_user_contest_permission def contest_problem_submissions_list_page(request, contest_id, page=1): """ 单个比赛中的所有提交（包含自己和别人，自己可查提交结果，其他人不可查） """ try: contest = Contest.objects.get(id=contest_id) except Contest.DoesNotExist: return error_page(request, u"比赛不存在") submissions = Submission.objects.filter(contest_id=contest_id).\ values("id", "contest_id", "problem_id", "result", "create_time", "accepted_answer_time", "language", "user_id").order_by("-create_time") user_id = request.GET.get("user_id", None) if user_id: submissions = submissions.filter(user_id=request.GET.get("user_id")) # 封榜的时候只能看到自己的提交 if not contest.real_time_rank: if not (request.user.admin_type == SUPER_ADMIN or request.user == contest.created_by): submissions = submissions.filter(user_id=request.user.id) language = request.GET.get("language", None) filter = None if language: submissions = submissions.filter(language=int(language)) filter = {"name": "language", "content": language} result = request.GET.get("result", None) if result: submissions = submissions.filter(result=int(result)) filter = {"name": "result", "content": result} paginator = Paginator(submissions, 20) # 为查询题目标题创建新字典 title = {} contest_problems = ContestProblem.objects.filter(contest=contest) for item in contest_problems: title[item.id] = item.title for item in submissions: item['title'] = title[item['problem_id']] 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 for item in current_page: # 自己提交的 管理员和创建比赛的可以看到所有的提交链接 if item["user_id"] == request.user.id or request.user.admin_type == SUPER_ADMIN or \ request.user == contest.created_by: item["show_link"] = True else: item["show_link"] = False return render(request, "oj/contest/submissions_list.html", {"submissions": current_page, "page": int(page), "previous_page": previous_page, "next_page": next_page, "start_id": int(page) * 20 - 20, "contest": contest, "filter": filter, "user_id": user_id})