add FragmentMixin and UseFragmentsMixin classes

core/utils.py

@@ -13,40 +13,20 @@
 #
 #
 
-from dataclasses import dataclass
 from datetime import date, timedelta
 
 # Image utils
 from io import BytesIO
-from typing import Any
 
 import PIL
 from django.conf import settings
 from django.core.files.base import ContentFile
-from django.forms import BaseForm
 from django.http import HttpRequest
-from django.template.loader import render_to_string
-from django.utils.html import SafeString
 from django.utils.timezone import localdate
 from PIL import ExifTags
 from PIL.Image import Image, Resampling
 
 
-@dataclass
-class FormFragmentTemplateData[T: BaseForm]:
-    """Dataclass used to pre-render form fragments"""
-
-    form: T
-    template: str
-    context: dict[str, Any]
-
-    def render(self, request: HttpRequest) -> SafeString:
-        # Request is needed for csrf_tokens
-        return render_to_string(
-            self.template, context={"form": self.form, **self.context}, request=request
-        )
-
-
 def get_start_of_semester(today: date | None = None) -> date:
     """Return the date of the start of the semester of the given date.
     If no date is given, return the start date of the current semester.