Squashed commit of the following:

commit e08aecabb4db848b495f86c6095fd0ee1edc05be
Author: reverend <reverend@reverend2048.de>
Date:   Sun Dec 18 09:15:25 2022 +0100

django_web_galleries/web_galleries/models.py

@@ -1,3 +1,107 @@
 from django.db import models
+from django.core.exceptions import ValidationError
+from django.utils.translation import gettext as _
+
+class Visitor(models.Model):
+    """
+    Stores information about a visitor of this application.
+    No personal information is gathered, the name is optional and can be anything.
+    The name has to be unique, tho.
+    """
+    session_id = models.CharField(
+        _('A cookie set by this application to identify a visitor by session'),
+        max_length=50
+    )
+    name = models.CharField(
+        _('Human readable, self assigned name of the visitor'),
+        null=True,
+        default=None,
+        max_length=50,
+        unique=True
+    )
+
+
+class Gallery(models.Model):
+    """
+    A gallery is a collection of multiple images.
+    It must be 
+    """
+    title = models.CharField(
+        _('Optional title for this gallery'),
+        null=True,
+        max_length=100
+    )
+    private = models.BooleanField(
+        _('Wether the gallery is vsibile publicly or to certain users only'),
+        default=False,
+        blank=True
+    )
+    access_code = models.CharField(
+        _('Code to access private galleries'),
+        null=True,
+        max_length=32
+    )
+
+    created_by = models.ForeignKey(
+        Visitor,
+        verbose_name=_('Visitor who created the gallery'),
+        related_name='created_galleries',
+        on_delete=models.CASCADE
+    )
+        
+    visitors = models.ManyToManyField(
+        Visitor,
+        verbose_name=_('Visitors that a part of this gallery'),
+        related_name='linked_galleries'
+    )
+
+    def clean(self):
+        if self.private and access_code is None:
+            raise ValidationErrorr('Private gallery needs an access code')
+        if len(self.visitors.all()) > 10:
+            raise ValidationError('Gallery can not have more than 10 visitors assigned')
+
+
+class Image(models.Model):
+    """
+    An image contains the path to the image file and several information
+    like description, uploader and affiliation to galleries.
+    """
+    description = models.TextField(
+        _('An optional description of the Image'),
+        null=True
+    )
+    image_file = models.ImageField(
+        _('File of the image'),
+        upload_to='web_galleries/uploads/'
+    )
+
+    private = models.BooleanField(
+        _('Wether this image is visible publicly or to certain users only'),
+        default=False,
+        blank=True
+    )
+    access_code = models.CharField(
+        _('Code to access private images'),
+        null=True,
+        max_length=32
+    )
+
+    uploaded_by = models.ForeignKey(
+        Visitor,
+        verbose_name=_('Which visitor uploaded this picture'),
+        null=True,
+        related_name='uploaded_images',
+        on_delete=models.SET_NULL
+    )
+    uploaded_when = models.DateTimeField(
+        _('When this picture was uploaded'),
+        auto_now_add=True
+    )
+
+    galleries = models.ManyToManyField(
+        Gallery,
+        verbose_name=_('What galleries this image is in'),
+        related_name='images'
+    )
 
-# Create your models here.