added event crud

app/common/permissions.py

@@ -1,6 +1,17 @@
 from rest_framework import permissions
 
 
+class IsWorker(permissions.BasePermission):
+    """
+    Checks if request user is worker(not hr or admin)
+    """
+
+    def has_permission(self, request, view):
+        if request.method in permissions.SAFE_METHODS:
+            return True
+        return not request.user.is_manager
+
+
 class IsManager(permissions.BasePermission):
     """
     Checks if request user is an admin or hr
@@ -14,7 +25,7 @@ class IsManager(permissions.BasePermission):
 
 class IsAdmin(permissions.BasePermission):
     """
-    Checks if request user is an admin or hr
+    Checks if request user is an admin
     """
 
     def has_permission(self, request, view):

app/conf/api.py

@@ -1,6 +1,7 @@
 from django.urls import path, include
 from rest_framework_simplejwt.views import TokenObtainPairView, TokenRefreshView
 
+from events.api.views import ListCreateEventApi, RetireUpdateDeleteEventApi
 from marketplace.api.views import ListCreateProductApi, RetireUpdateDestroyProductApi
 from users.api.views import (
     ListCreateUserApi,
@@ -23,6 +24,19 @@ urlpatterns = [
             ]
         ),
     ),
+    path(
+        "events/",
+        include(
+            [
+                path("", ListCreateEventApi.as_view(), name="list_create_event"),
+                path(
+                    "<str:slug>",
+                    RetireUpdateDeleteEventApi.as_view(),
+                    name="get_update_delete_event",
+                ),
+            ]
+        ),
+    ),
     path(
         "marketplace/",
         include(

app/conf/settings/local.py

@@ -39,6 +39,7 @@ REST_FRAMEWORK = {
         "rest_framework_simplejwt.authentication.JWTAuthentication",
     ),
     "DEFAULT_PERMISSION_CLASSES": ("rest_framework.permissions.AllowAny",),
+    "DATETIME_FORMAT": "%Y-%m-%dT%H:%M:%S.%fZ",
 }
 
 # STATIC

app/events/api/serializers.py

@@ -0,0 +1,32 @@
+from rest_framework import serializers
+
+from events.models import Event
+from users.api.serializers import UserSerializer
+
+
+class EventSerializer(serializers.ModelSerializer):
+    creator = UserSerializer(many=False, read_only=True)
+
+    class Meta:
+        model = Event
+        fields = [
+            "name",
+            "about",
+            "slug",
+            "creator",
+            "starts",
+            "image",
+            "planning",
+            "attended",
+        ]
+        extra_kwargs = {
+            "slug": {"read_only": True},
+            "creator": {"read_only": True},
+            "planning": {"read_only": True},
+            "attended": {"read_only": True},
+        }
+
+    def create(self, validated_data):
+        return Event.objects.create(
+            **validated_data, creator=self.context["request"].user
+        )

app/events/api/views.py

@@ -0,0 +1,34 @@
+from datetime import datetime
+
+import pytz
+from rest_framework import generics
+from rest_framework.generics import get_object_or_404
+from rest_framework.parsers import FormParser, MultiPartParser
+from rest_framework.permissions import IsAuthenticated
+
+from common.permissions import IsManager
+from events.api.serializers import EventSerializer
+from events.models import Event
+
+
+class ListCreateEventApi(generics.ListCreateAPIView):
+    serializer_class = EventSerializer
+    parser_classes = [FormParser, MultiPartParser]
+    permission_classes = [IsAuthenticated, IsManager]
+    queryset = Event.objects.filter(
+        starts__gte=datetime.now(pytz.timezone("Europe/Moscow"))
+    )
+
+
+class RetireUpdateDeleteEventApi(generics.RetrieveUpdateDestroyAPIView):
+    def get_object(self):
+        event = get_object_or_404(
+            Event,
+            slug=self.request.parser_context["kwargs"]["slug"],
+        )
+        return event
+
+    serializer_class = EventSerializer
+    parser_classes = [FormParser, MultiPartParser]
+    permission_classes = [IsAuthenticated, IsManager]
+    queryset = Event.objects.all()

app/events/apps.py

@@ -2,5 +2,8 @@ from django.apps import AppConfig
 
 
 class EventsConfig(AppConfig):
-    default_auto_field = 'django.db.models.BigAutoField'
+    default_auto_field = "django.db.models.BigAutoField"
-    name = 'events'
+    name = "events"
+
+    def ready(self):
+        import events.signals

app/events/migrations/0001_initial.py

@@ -0,0 +1,45 @@
+# Generated by Django 4.0.8 on 2022-10-08 15:44
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Event',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=100)),
+                ('slug', models.SlugField(max_length=8)),
+                ('about', models.TextField(blank=True)),
+                ('starts', models.DateTimeField()),
+                ('image', models.ImageField(blank=True, upload_to='uploads/')),
+                ('image_cropped', models.ImageField(blank=True, upload_to='cropped/')),
+                ('planning', models.IntegerField(default=0)),
+                ('attended', models.IntegerField(default=0)),
+                ('creator', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='events_created', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'ordering': ['-starts'],
+            },
+        ),
+        migrations.CreateModel(
+            name='EventAttendance',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('token', models.CharField(max_length=128, unique=True)),
+                ('attended', models.BooleanField(default=False)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='people', to='events.event')),
+                ('worker', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='events', to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]

app/events/models.py

@@ -1,3 +1,36 @@
 from django.db import models
 
-# Create your models here.
+from users.models import User
+
+
+class Event(models.Model):
+    name = models.CharField(max_length=100)
+    slug = models.SlugField(max_length=8)
+    about = models.TextField(blank=True)
+
+    creator = models.ForeignKey(
+        User, related_name="events_created", on_delete=models.CASCADE
+    )
+    starts = models.DateTimeField(blank=False)
+
+    image = models.ImageField(upload_to="uploads/", blank=True)
+    image_cropped = models.ImageField(upload_to="cropped/", blank=True)
+
+    planning = models.IntegerField(default=0)
+    attended = models.IntegerField(default=0)
+
+    def __str__(self):
+        return self.name
+
+    class Meta:
+        ordering = ["-starts"]
+
+
+class EventAttendance(models.Model):
+    event = models.ForeignKey(Event, related_name="people", on_delete=models.CASCADE)
+    worker = models.ForeignKey(User, related_name="events", on_delete=models.CASCADE)
+    token = models.CharField(blank=False, unique=True, max_length=128)
+    attended = models.BooleanField(default=False)
+
+    def __str__(self):
+        return f"{self.worker.name} attendance on {self.event.name}"

app/events/services.py

@@ -0,0 +1,13 @@
+from rest_framework.generics import get_object_or_404
+
+from events.models import EventAttendance
+
+
+def submit_attendance(token: str):
+    attendance = get_object_or_404(EventAttendance, token=token)
+    if not attendance.attended:
+        attendance.attended = True
+        attendance.save()
+
+        attendance.event.attended += 1
+        attendance.event.save()

app/events/signals.py

@@ -0,0 +1,41 @@
+from django.core.files import File
+from django.db.models.signals import pre_save, post_delete, post_save
+from django.dispatch import receiver
+
+from utils.file import crop_image
+from utils.generators import generate_charset
+from .models import EventAttendance, Event
+
+
+@receiver(pre_save, sender=EventAttendance)
+def create_attendance(sender, instance, **kwargs):
+    token = generate_charset(25)
+    while EventAttendance.objects.filter(token=token).exists():
+        token = generate_charset(25)
+    instance.token = token
+
+    instance.event.planning += 1
+    instance.event.save(update_fileds=["planning"])
+
+
+@receiver(post_save, sender=Event)
+def process_event(sender, instance, created, **kwargs):
+    if created:
+        slug = generate_charset(5)
+        while Event.objects.filter(slug=slug).exists():
+            slug = generate_charset(5)
+        instance.slug = slug
+        instance.save(update_fields=["slug"])
+
+    if instance.image and kwargs["update_fields"] is None:
+        instance.image_cropped = File(
+            crop_image(instance.image.path, cut_to=(250, 250)),
+            name=instance.image.path.split(".")[0].split("/")[-1] + ".png",
+        )
+        instance.save(update_fields=["image_cropped"])
+
+
+@receiver(post_delete, sender=EventAttendance)
+def delete_attendance(sender, instance, **kwargs):
+    instance.event.planning -= 1
+    instance.event.save(update_fileds=["planning"])

app/events/views.py

@@ -1,3 +0,0 @@
-from django.shortcuts import render
-
-# Create your views here.