Initial

backend/app/models/place.py

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+from django.db import models
+from django.db.models.signals import post_delete
+from django.dispatch import receiver
+
+import os
+from datetime import date
+
+from map_location.fields import LocationField
+
+from app.fields import MonthField
+from common.form.img_with_preview import ThumbnailImageField
+
+import typing
+if typing.TYPE_CHECKING:
+    from app.models.city import City
+
+
+def overwrite_img_upload(instance: 'Place', filename: str):
+    id = instance.pk or (Place.objects.count() + 1)
+    path = instance.city.data_path / f'{id}.jpg'
+
+    if path.is_file():
+        os.remove(path)
+    return f'{instance.city.data_url}/{id}.jpg'
+
+
+class Place(models.Model):
+    created = models.DateTimeField('Erstellt', auto_now_add=True)
+    updated = models.DateTimeField('Geändert', auto_now=True)
+
+    city: 'models.ForeignKey[City]' = models.ForeignKey(
+        'City', on_delete=models.CASCADE, related_name='places',
+        verbose_name='Stadt')
+
+    address = models.CharField('Adresse', max_length=100)
+    img = ThumbnailImageField('Bild', blank=True, null=True,
+                              upload_to=overwrite_img_upload)  # type: ignore
+    since = MonthField('Seit', blank=True, null=True)
+    until = MonthField('Bis', blank=True, null=True)
+    description = models.TextField('Beschreibung', blank=True, null=True)
+    location = LocationField('Position', blank=True, null=True, options={
+        'map': {
+            'center': [52.52, 13.40],
+            'zoom': 12,
+        },
+    })
+
+    class Meta:
+        verbose_name = 'Gebäude'
+        verbose_name_plural = 'Gebäude'
+        ordering = ['address']
+
+    def __str__(self) -> str:
+        return self.address
+
+    @property
+    def isVacant(self):
+        if not self.until:
+            return True
+        now = date.today()
+        year = int(self.until[:4])
+        if year > now.year:
+            return True
+        return year == now.year and int((self.until + '-12')[5:7]) >= now.month
+
+    def save(self, *args, **kwargs):
+        rv = super().save(*args, **kwargs)
+        self.city.update_json()
+        return rv
+
+    def asJson(self) -> 'dict[str, str|list[float]|None]':
+        return {
+            'id': self.pk,
+            'since': self.since,
+            'until': self.until,
+            'addr': self.address,
+            'desc': self.description,
+            'img': self.img.url if self.img else None,
+            'loc': [round(self.location.lat, 6),
+                    round(self.location.long, 6)] if self.location else None,
+        }
+
+
+@receiver(post_delete, sender=Place)
+def on_delete_Place(sender, instance: 'Place', using, **kwargs):
+    instance.city.update_json()