refactor(forms): unify forms with BaseApplicationForm and CommonOrderMixin for consistent fields and order

input/forms.py

@@ -1,9 +1,10 @@
 from django.conf import settings
-from django.forms import ModelForm, ChoiceField, RadioSelect, BooleanField
+from django.forms import ModelForm, ChoiceField, RadioSelect, BooleanField, CharField, EmailField
 from django.contrib.admin.widgets import AdminDateWidget
 from django.forms.renderers import DjangoTemplates
 from django.utils.html import format_html
 from django.utils.safestring import mark_safe
+from django import forms
 
 from .models import (
     TYPE_CHOICES,
@@ -33,7 +34,6 @@ class FdbForm(ModelForm):
 
 
 class ProjectForm(FdbForm):
-
     # start = DateField(widget=AdminDateWidget())
 
     class Meta:
@@ -47,6 +47,48 @@ class ProjectForm(FdbForm):
         js = ('dropdown/js/otrs_link.js',)
 
 
+class CommonOrderMixin(forms.Form):
+    """
+    Ensures a consistent field order for all forms that inherit from this mixin.
+
+    The goal is to always render:
+      - "realname" and "email" fields at the top,
+      - all other fields in the middle (in the order Django provides),
+      - "check" (terms/privacy checkbox) at the bottom.
+
+    This keeps the UX consistent across all forms without repeating field_order logic.
+    """
+
+    # Fields that should always appear first in the form
+    field_order_head = ('realname', 'email')
+
+    # Fields that should always appear last in the form
+    field_order_tail = ('check',)  # rename if your checkbox field is called differently
+
+    def __init__(self, *args, **kwargs):
+        """
+        Override the default form initialization to reorder fields.
+        The method:
+          1. Collects all existing field names.
+          2. Puts the 'head' fields first (if they exist in this form).
+          3. Keeps all other fields in the middle.
+          4. Puts the 'tail' fields last (if they exist in this form).
+        """
+        super().__init__(*args, **kwargs)
+
+        existing = list(self.fields.keys())
+
+        # Select only fields that actually exist in this form
+        head = [f for f in self.field_order_head if f in self.fields]
+        tail = [f for f in self.field_order_tail if f in self.fields]
+
+        # All other fields that are not explicitly in head or tail
+        middle = [f for f in existing if f not in (*head, *tail)]
+
+        # Apply the new order to the form fields
+        self.order_fields(head + middle + tail)
+
+
 class ExternForm(FdbForm):
 
     choice = ChoiceField(choices=TYPE_CHOICES.items(), widget=RadioSelect,
@@ -79,7 +121,33 @@ HOTEL_CHOICES = {'TRUE': mark_safe('Hotelzimmer benötigt'),
                  }
 
 
-class TravelForm(FdbForm):
+class BaseApplicationForm(FdbForm):
+    """
+    Base form for all external applications.
+
+    - Adds standard fields that must appear in every form:
+      * realname (applicant's full name)
+      * email (contact address for notifications)
+      * check (confirmation of data protection and funding policy)
+    - Ensures consistency across all application types.
+    """
+    realname = CharField(
+        label="Realname",
+        required=True,
+        help_text="Bitte gib deinen Vor- und Nachnamen ein."
+    )
+    email = EmailField(
+        label="E-Mail-Adresse",
+        required=True,
+        help_text="Bitte gib deine E-Mail-Adresse ein, damit dich <br> Wikimedia Deutschland bei Rückfragen oder für <br> die Zusage kontaktieren kann."
+    )
+    check = BooleanField(required=True,
+                         label=format_html(
+                             "Ich stimme den <a href='{}' target='_blank' rel='noopener'>Datenschutzbestimmungen</a> und der<br> <a href='{}' target='_blank' rel='noopener'>Richtlinie zur Förderung der Communitys</a> zu",
+                             settings.DATAPROTECTION, settings.FOERDERRICHTLINIEN))
+
+
+class TravelForm(BaseApplicationForm, CommonOrderMixin):
     # TODO: add some javascript to show/hide other-field
 
     # this is the code, to change required to false if needed
@@ -107,7 +175,7 @@ class TravelForm(FdbForm):
         }
 
 
-class LibraryForm(FdbForm):
+class LibraryForm(BaseApplicationForm, CommonOrderMixin):
 
     class Meta:
         model = Library
@@ -144,7 +212,7 @@ class HonoraryCertificateForm(FdbForm):
         js = ('dropdown/js/otrs_link.js',)
 
 
-class IFGForm(FdbForm):
+class IFGForm(BaseApplicationForm, CommonOrderMixin):
     class Meta:
         model = IFG
         fields = ['cost', 'url', 'notes']
@@ -174,7 +242,7 @@ class CheckForm(FdbForm):
 #                         NUTZUNGSBEDINGUNGEN))
 
 
-class LiteratureForm(CheckForm):
+class LiteratureForm(BaseApplicationForm, CommonOrderMixin):
     termstoaccept = settings.NUTZUNGSBEDINGUNGEN_LITERATURSTIPENDIUM
 
     def __init__(self, *args, **kwargs):
@@ -192,7 +260,7 @@ ADULT_CHOICES = {'TRUE': mark_safe('Ich bin volljährig.'),
         }
 
 
-class EmailForm(CheckForm):
+class EmailForm(BaseApplicationForm, CommonOrderMixin):
 
     termstoaccept = settings.NUTZUNGSBEDINGUNGEN_EMAIL_SERVICE
 
@@ -216,7 +284,7 @@ class EmailForm(CheckForm):
 
 
 
-class BusinessCardForm(CheckForm):
+class BusinessCardForm(BaseApplicationForm, CommonOrderMixin):
     termstoaccept = settings.NUTZUNGSBEDINGUNGEN_VISITENKARTEN
     # this is the code, to change required to false if needed
     def __init__(self, *args, **kwargs):
@@ -232,7 +300,7 @@ class BusinessCardForm(CheckForm):
         js = ('dropdown/js/businessCard.js',)
 
 
-class ListForm(CheckForm):
+class ListForm(BaseApplicationForm, CommonOrderMixin):
     termstoaccept = settings.NUTZUNGSBEDINGUNGEN_MAILINGLISTEN
     class Meta:
         model = List