Finished

db/migrations/0002_user_order_alter_movie_actors_alter_movie_genres_and_more.py

@@ -0,0 +1,95 @@
+# Generated by Django 4.0.2 on 2024-10-21 21:07
+
+from django.conf import settings
+import django.contrib.auth.models
+import django.contrib.auth.validators
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('auth', '0012_alter_user_first_name_max_length'),
+        ('db', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='User',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('password', models.CharField(max_length=128, verbose_name='password')),
+                ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
+                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
+                ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')),
+                ('first_name', models.CharField(blank=True, max_length=150, verbose_name='first name')),
+                ('last_name', models.CharField(blank=True, max_length=150, verbose_name='last name')),
+                ('email', models.EmailField(blank=True, max_length=254, verbose_name='email address')),
+                ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
+                ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
+                ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
+                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.Group', verbose_name='groups')),
+                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.Permission', verbose_name='user permissions')),
+            ],
+            options={
+                'verbose_name': 'user',
+                'verbose_name_plural': 'users',
+                'abstract': False,
+            },
+            managers=[
+                ('objects', django.contrib.auth.models.UserManager()),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Order',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='orders', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'ordering': ['-created_at'],
+            },
+        ),
+        migrations.AlterField(
+            model_name='movie',
+            name='actors',
+            field=models.ManyToManyField(related_name='movies', to='db.Actor'),
+        ),
+        migrations.AlterField(
+            model_name='movie',
+            name='genres',
+            field=models.ManyToManyField(related_name='movies', to='db.Genre'),
+        ),
+        migrations.AlterField(
+            model_name='movie',
+            name='title',
+            field=models.CharField(db_index=True, max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='moviesession',
+            name='cinema_hall',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='movie_sessions', to='db.cinemahall'),
+        ),
+        migrations.AlterField(
+            model_name='moviesession',
+            name='movie',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='movie_sessions', to='db.movie'),
+        ),
+        migrations.CreateModel(
+            name='Ticket',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('row', models.IntegerField()),
+                ('seat', models.IntegerField()),
+                ('movie_session', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='db.moviesession')),
+                ('order', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='db.order')),
+            ],
+        ),
+        migrations.AddConstraint(
+            model_name='ticket',
+            constraint=models.UniqueConstraint(fields=('movie_session', 'row', 'seat'), name='unique_ticket_per_seat'),
+        ),
+    ]

db/models.py

@@ -1,4 +1,7 @@
+from django.core.exceptions import ValidationError
 from django.db import models
+from django.contrib.auth.models import AbstractUser
+from django.conf import settings
 
 
 class Genre(models.Model):
@@ -17,7 +20,7 @@ def __str__(self) -> str:
 
 
 class Movie(models.Model):
-    title = models.CharField(max_length=255)
+    title = models.CharField(max_length=255, db_index=True)
     description = models.TextField()
     actors = models.ManyToManyField(to=Actor, related_name="movies")
     genres = models.ManyToManyField(to=Genre, related_name="movies")
@@ -42,11 +45,75 @@ def __str__(self) -> str:
 class MovieSession(models.Model):
     show_time = models.DateTimeField()
     cinema_hall = models.ForeignKey(
-        to=CinemaHall, on_delete=models.CASCADE, related_name="movie_sessions"
+        to=CinemaHall,
+        on_delete=models.CASCADE,
+        related_name="movie_sessions"
     )
     movie = models.ForeignKey(
-        to=Movie, on_delete=models.CASCADE, related_name="movie_sessions"
+        to=Movie,
+        on_delete=models.CASCADE,
+        related_name="movie_sessions"
     )
 
     def __str__(self) -> str:
         return f"{self.movie.title} {str(self.show_time)}"
+
+
+class Order(models.Model):
+    created_at = models.DateTimeField(auto_now_add=True)
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="orders"
+    )
+
+    def __str__(self) -> str:
+        return f"<Order: {self.created_at}>"
+
+    class Meta:
+        ordering = ["-created_at"]
+
+
+class User(AbstractUser):
+    pass
+
+
+class Ticket(models.Model):
+    movie_session = models.ForeignKey(to=MovieSession,
+                                      on_delete=models.CASCADE)
+    order = models.ForeignKey(to=Order, on_delete=models.CASCADE)
+    row = models.IntegerField()
+    seat = models.IntegerField()
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(
+                fields=["movie_session", "row", "seat"],
+                name="unique_ticket_per_seat"
+            )
+        ]
+
+    def clean(self) -> None:
+        cinema_hall = self.movie_session.cinema_hall
+
+        if self.row < 1 or self.row > cinema_hall.rows:
+            raise ValidationError(
+                f"Row number {self.row} is invalid. "
+                f"This cinema hall has {cinema_hall.rows} rows."
+            )
+
+        if self.seat < 1 or self.seat > cinema_hall.seats_in_row:
+            raise ValidationError(
+                f"Seat number {self.seat} is invalid. "
+                f"Each row has {cinema_hall.seats_in_row} seats."
+            )
+
+    def save(self, *args, **kwargs) -> None:
+        self.full_clean()
+        super().save(*args, **kwargs)
+
+    def __str__(self) -> str:
+        return (
+            f"<Ticket: {self.movie_session} "
+            f"(row: {self.row}, seat: {self.seat})>"
+        )

services/movie.py

@@ -1,11 +1,12 @@
+from django.db import transaction
 from django.db.models import QuerySet
-
 from db.models import Movie
 
 
 def get_movies(
     genres_ids: list[int] = None,
     actors_ids: list[int] = None,
+    title: str = None,
 ) -> QuerySet:
     queryset = Movie.objects.all()
 
@@ -15,6 +16,9 @@ def get_movies(
     if actors_ids:
         queryset = queryset.filter(actors__id__in=actors_ids)
 
+    if title:
+        queryset = queryset.filter(title__icontains=title)
+
     return queryset
 
 
@@ -28,13 +32,16 @@ def create_movie(
     genres_ids: list = None,
     actors_ids: list = None,
 ) -> Movie:
-    movie = Movie.objects.create(
-        title=movie_title,
-        description=movie_description,
-    )
-    if genres_ids:
-        movie.genres.set(genres_ids)
-    if actors_ids:
-        movie.actors.set(actors_ids)
+    with transaction.atomic():
+        movie = Movie.objects.create(
+            title=movie_title,
+            description=movie_description,
+        )
+
+        if genres_ids:
+            movie.genres.set(genres_ids)
+
+        if actors_ids:
+            movie.actors.set(actors_ids)
 
-    return movie
+        return movie

services/movie_session.py

@@ -1,6 +1,6 @@
 from django.db.models import QuerySet
 
-from db.models import MovieSession
+from db.models import MovieSession, Ticket
 
 
 def create_movie_session(
@@ -42,3 +42,13 @@ def update_movie_session(
 
 def delete_movie_session_by_id(session_id: int) -> None:
     MovieSession.objects.get(id=session_id).delete()
+
+
+def get_taken_seats(movie_session_id: int) -> list[dict]:
+
+    tickets = Ticket.objects.filter(movie_session_id=movie_session_id)
+
+    taken_seats = [{"row": ticket.row,
+                    "seat": ticket.seat} for ticket in tickets]
+
+    return taken_seats

services/order.py

@@ -0,0 +1,52 @@
+from django.db import transaction
+from django.utils import timezone
+from django.core.exceptions import ObjectDoesNotExist
+from db.models import Order, Ticket, MovieSession, User
+
+
+def create_order(tickets: list[dict], username: str,
+                 date: str = None) -> Order:
+    try:
+        user = User.objects.get(username=username)
+    except ObjectDoesNotExist:
+        raise ValueError(
+            f"User with username {username} does not exist."
+        )
+
+    with transaction.atomic():
+        order = Order.objects.create(
+            user=user,
+            created_at=date if date else timezone.now()
+        )
+
+        # Create tickets associated with the order
+        for ticket_data in tickets:
+            row = ticket_data.get("row")
+            seat = ticket_data.get("seat")
+            movie_session_id = ticket_data.get("movie_session")
+
+            try:
+                movie_session = MovieSession.objects.get(id=movie_session_id)
+            except ObjectDoesNotExist:
+                raise ValueError(
+                    f"Movie session with id {movie_session_id} does not exist."
+                )
+
+            Ticket.objects.create(
+                row=row,
+                seat=seat,
+                movie_session=movie_session,
+                order=order
+            )
+
+    return order
+
+
+def get_orders(username: str = None) -> list[Order]:
+    if username:
+        try:
+            user = User.objects.get(username=username)
+            return Order.objects.filter(user=user).order_by("-created_at")
+        except ObjectDoesNotExist:
+            return []
+    return Order.objects.all().order_by("-created_at")

services/user.py

@@ -0,0 +1,59 @@
+from django.contrib.auth import get_user_model
+from django.core.exceptions import ObjectDoesNotExist
+
+User = get_user_model()
+
+
+def create_user(
+        username: str,
+        password: str,
+        email: str = None,
+        first_name: str = None,
+        last_name: str = None
+) -> User:
+    user = User.objects.create_user(username=username, password=password)
+
+    if email:
+        user.email = email
+    if first_name:
+        user.first_name = first_name
+    if last_name:
+        user.last_name = last_name
+
+    user.save()
+    return user
+
+
+def get_user(user_id: int) -> User:
+    try:
+        return User.objects.get(id=user_id)
+    except ObjectDoesNotExist:
+        return None
+
+
+def update_user(
+        user_id: int,
+        username: str = None,
+        password: str = None,
+        email: str = None,
+        first_name: str = None,
+        last_name: str = None
+) -> User:
+    try:
+        user = User.objects.get(id=user_id)
+
+        if username:
+            user.username = username
+        if password:
+            user.set_password(password)
+        if email:
+            user.email = email
+        if first_name:
+            user.first_name = first_name
+        if last_name:
+            user.last_name = last_name
+
+        user.save()
+        return user
+    except ObjectDoesNotExist:
+        return None

settings.py

@@ -24,5 +24,9 @@
 USE_TZ = False
 
 INSTALLED_APPS = [
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
     "db",
 ]
+
+AUTH_USER_MODEL = "db.User"