[feature request] Adicionar página de contest

apps/contests/__init__.py

@@ -0,0 +1,8 @@
+from django.apps import AppConfig
+
+default_app_config = "apps.contests.ContestsConfig"
+
+
+class ContestsConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "appscontests"

apps/contests/admin.py

@@ -0,0 +1,47 @@
+from typing import TYPE_CHECKING
+
+from django.contrib.admin import ModelAdmin, register
+from django.forms import (
+    CharField,
+    ModelForm,
+    ModelMultipleChoiceField,
+    Textarea,
+)
+from django.utils.translation import gettext_lazy as _
+
+from apps.contests.models import Contest
+from apps.users.models import User
+
+if TYPE_CHECKING:
+    ContestAdminBase = ModelAdmin[Contest]
+    ContestModelFormBase = ModelForm[Contest]
+else:
+    ContestAdminBase = ModelAdmin
+    ContestModelFormBase = ModelForm
+
+
+class ContestModelForm(ContestModelFormBase):
+    description = CharField(widget=Textarea(attrs={"rows": 14, "cols": 80}))
+    users = ModelMultipleChoiceField(
+        queryset=User.objects.all(), required=False
+    )
+
+    class Meta:
+        model = Contest
+        fields = "__all__"
+
+
+@register(Contest)
+class ContestAdmin(ContestAdminBase):
+    form = ContestModelForm
+
+    list_display = ("title", "start_time", "end_time", "status")
+    list_filter = ("start_time", "end_time")
+
+    fieldsets = [
+        (_("General"), {"fields": ("title", "description")}),
+        (
+            _("Other"),
+            {"fields": ("start_time", "end_time", "users", "cancelled")},
+        ),
+    ]

apps/contests/enums.py

@@ -0,0 +1,8 @@
+from enum import StrEnum
+
+
+class ContestStatus(StrEnum):
+    PENDING = "Pending"
+    RUNNING = "Running"
+    FINISHED = "Finished"
+    CANCELLED = "Cancelled"

apps/contests/migrations/0001_initial.py

@@ -0,0 +1,44 @@
+# Generated by Django 4.2.5 on 2023-09-30 05:03
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="Contest",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("title", models.CharField(max_length=256)),
+                ("description", models.CharField(max_length=1024)),
+                ("start_time", models.DateTimeField()),
+                ("end_time", models.DateTimeField()),
+                (
+                    "users",
+                    models.ManyToManyField(
+                        related_name="contests", to=settings.AUTH_USER_MODEL
+                    ),
+                ),
+            ],
+            options={
+                "db_table": "contests",
+            },
+        ),
+    ]

apps/contests/migrations/0002_contest_cancelled.py

@@ -0,0 +1,17 @@
+# Generated by Django 4.2.5 on 2023-09-30 05:21
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("contests", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="contest",
+            name="cancelled",
+            field=models.BooleanField(default=False),
+        ),
+    ]

apps/contests/models.py

@@ -0,0 +1,44 @@
+from django.db.models import (
+    BooleanField,
+    CharField,
+    DateTimeField,
+    ManyToManyField,
+)
+from django.utils.timezone import now
+
+from apps.contests.enums import ContestStatus
+from apps.users.models import User
+from core.models import TimestampedModel
+
+
+class Contest(TimestampedModel):
+    """Represents a contest."""
+
+    id: int
+
+    title = CharField(max_length=256)
+    description = CharField(max_length=1024)
+
+    start_time = DateTimeField()
+    end_time = DateTimeField()
+    cancelled = BooleanField(default=False)
+
+    users = ManyToManyField(User, related_name="contests")
+
+    class Meta:
+        db_table = "contests"
+
+    def __str__(self) -> str:
+        return f"{self.title} #{self.id}"
+
+    @property
+    def status(self) -> ContestStatus:
+        if self.cancelled:
+            return ContestStatus.CANCELLED
+
+        if self.start_time > now():
+            return ContestStatus.PENDING
+        elif self.end_time < now():
+            return ContestStatus.FINISHED
+        else:
+            return ContestStatus.RUNNING

apps/contests/urls.py

@@ -0,0 +1,11 @@
+from django.urls import path
+
+from apps.contests.views import DetailView, IndexView, send
+
+app_name = "contests"
+
+urlpatterns = [
+    path("", IndexView.as_view(), name="index"),
+    path("<int:pk>/", DetailView.as_view(), name="detail"),
+    path("<int:contest_id>/send/", send, name="send"),
+]

apps/contests/views.py

@@ -0,0 +1,51 @@
+import sys
+from io import StringIO
+from typing import TYPE_CHECKING
+
+from django.db.models.query import QuerySet
+from django.http import HttpRequest, HttpResponse
+from django.shortcuts import get_object_or_404
+from django.views import generic
+
+from apps.contests.models import Contest
+
+if TYPE_CHECKING:
+    IndexViewBase = generic.ListView[Contest]
+    DetailViewBase = generic.DetailView[Contest]
+else:
+    IndexViewBase = generic.ListView
+    DetailViewBase = generic.DetailView
+
+
+class IndexView(IndexViewBase):
+    template_name = "contests/index.html"
+    context_object_name = "contests"
+
+    def get_queryset(self) -> QuerySet[Contest]:
+        return Contest._default_manager.order_by("-start_time")[:5]
+
+
+class DetailView(DetailViewBase):
+    model = Contest
+    template_name = "contests/detail.html"
+
+
+def send(request: HttpRequest, contest_id: int) -> HttpResponse:
+    contest = get_object_or_404(Contest, pk=contest_id)
+    code = request.POST["code"]
+
+    old_stdout = sys.stdout
+    sys.stdout = buffer = StringIO()
+
+    try:
+        eval(code)
+    except Exception as exc:
+        sys.stdout = old_stdout
+        return HttpResponse(f"Contest {contest.title} failed.\n{exc}")
+
+    sys.stdout = old_stdout
+    message = buffer.getvalue()
+
+    return HttpResponse(
+        f"Contest {contest.title} ran successfully.\n{message}"
+    )

apps/users/models.py

@@ -1,13 +1,22 @@
+from typing import TYPE_CHECKING, Any, List
+
 from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin
 from django.db.models import BooleanField, CharField, EmailField
 
 from apps.users.managers import UserManager
 from core.models import TimestampedModel
 
+if TYPE_CHECKING:
+    from apps.contests.models import Contest
+else:
+    Contest = Any
+
 
 class User(AbstractBaseUser, PermissionsMixin, TimestampedModel):
     """Represents an user."""
 
+    contests: List[Contest]
+
     email = EmailField(db_index=True, max_length=256, unique=True)
     username = CharField(db_index=True, max_length=128, unique=True)
 

server/settings/base.py

@@ -75,7 +75,10 @@
     "bootstrap5",
 ]
 
-LOCAL_APPS = ["apps.users"]
+LOCAL_APPS = [
+    "apps.users",
+    "apps.contests",
+]
 
 INSTALLED_APPS = DJANGO_APPS + THIRD_PARTY_APPS + LOCAL_APPS
 

server/urls.py

@@ -13,5 +13,5 @@
     path("", include("django.contrib.auth.urls")),
     # Local views
     path("", home_view, name="home"),
-    path("register/", register_view, name="register"),
+    path("contests/", include("apps.contests.urls")),
 ]

templates/base.html

@@ -47,7 +47,7 @@
             </li>
 
             <li class="nav-item">
-              <a class="nav-link text-white" href="#">
+              <a class="nav-link text-white" href="{% url 'contests:index' %}">
                 Contests
               </a>
             </li>

templates/contests/detail.html

@@ -0,0 +1,27 @@
+{% extends "base.html" %}
+
+{% block title %}{{ contest.title }}{% endblock title %}
+
+{% block content %}
+  <div>
+    <h1>{{ contest }}</h1>
+    <p>{{ contest.description }}</p>
+  </div>
+
+  <form action="{% url 'contests:send' contest.id %}" method="post">
+    {% csrf_token %}
+    <fieldset>
+      <legend>
+        <h1>{{ question.question_text }}</h1>
+      </legend>
+
+      {% if error_message %}
+        <p><strong>{{ error_message }}</strong></p>
+      {% endif %}
+
+      <textarea name="code" id="code" cols="50" rows="10"></textarea>
+    </fieldset>
+
+    <input type="submit" value="Vote">
+  </form>
+{% endblock content %}

templates/contests/index.html

@@ -0,0 +1,19 @@
+{% extends "base.html" %}
+
+{% block title %}Contests{% endblock title %}
+
+{% block content %}
+  {% if contests %}
+    <ul>
+      {% for contest in contests %}
+        <li>
+          <a href="{% url 'contests:detail' contest.id %}">
+            {{ contest }}
+          </a>
+        </li>
+      {% endfor %}
+    </ul>
+  {% else %}
+    <p>No contests are available.</p>
+  {% endif %}
+{% endblock content %}