#7 New Form

* adds NewEmaForm and EditEmaForm
* refactors ResponsibilityData related form fields into reusable mixin CompensationResponsibleFormMixin
   * used in NewEcoAccountForm and NewEmaForm for easier maintaining and reducing amount of code
* refactors templates /xy/new/view.html into /xy/form/view.html since the same template file is used for new and edit forms

ema/forms.py

@@ -0,0 +1,159 @@
+"""
+Author: Michel Peltriaux
+Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
+Contact: michel.peltriaux@sgdnord.rlp.de
+Created on: 06.10.21
+
+"""
+from django.contrib.auth.models import User
+from django.db import transaction
+from django.urls import reverse, reverse_lazy
+from django.utils.translation import gettext_lazy as _
+from compensation.forms.forms import AbstractCompensationForm, CompensationResponsibleFormMixin
+from ema.models import Ema
+from intervention.models import ResponsibilityData
+from konova.forms import SimpleGeomForm
+from user.models import UserActionLogEntry, UserAction
+
+
+class NewEmaForm(AbstractCompensationForm, CompensationResponsibleFormMixin):
+    """ Form for creating new EMA objects.
+
+    Inherits basic form fields from AbstractCompensationForm and additional from CompensationResponsibleFormMixin.
+    Second holds self.instance.response related fields
+
+    """
+    field_order = [
+        "identifier",
+        "title",
+        "conservation_office",
+        "conservation_file_number",
+        "handler",
+        "fundings",
+        "comment",
+    ]
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.form_title = _("New EMA")
+
+        self.action_url = reverse("ema:new")
+        self.cancel_redirect = reverse("ema:index")
+
+        tmp = Ema()
+        identifier = tmp.generate_new_identifier()
+        self.initialize_form_field("identifier", identifier)
+        self.fields["identifier"].widget.attrs["url"] = reverse_lazy("ema:new-id")
+        self.fields["title"].widget.attrs["placeholder"] = _("Compensation XY; Location ABC")
+
+    def save(self, user: User, geom_form: SimpleGeomForm):
+        with transaction.atomic():
+            # Fetch data from cleaned POST values
+            identifier = self.cleaned_data.get("identifier", None)
+            title = self.cleaned_data.get("title", None)
+            fundings = self.cleaned_data.get("fundings", None)
+            handler = self.cleaned_data.get("handler", None)
+            conservation_office = self.cleaned_data.get("conservation_office", None)
+            conservation_file_number = self.cleaned_data.get("conservation_file_number", None)
+            comment = self.cleaned_data.get("comment", None)
+
+            # Create log entry
+            action = UserActionLogEntry.objects.create(
+                user=user,
+                action=UserAction.CREATED,
+            )
+            # Process the geometry form
+            geometry = geom_form.save(action)
+
+            responsible = ResponsibilityData.objects.create(
+                handler=handler,
+                conservation_file_number=conservation_file_number,
+                conservation_office=conservation_office,
+            )
+
+            # Finally create main object
+            acc = Ema.objects.create(
+                identifier=identifier,
+                title=title,
+                responsible=responsible,
+                created=action,
+                geometry=geometry,
+                comment=comment,
+            )
+            acc.fundings.set(fundings)
+
+            # Add the creating user to the list of shared users
+            acc.users.add(user)
+
+            # Add the log entry to the main objects log list
+            acc.log.add(action)
+        return acc
+
+
+class EditEmaForm(NewEmaForm):
+    """ Form for editing EMAs
+
+    """
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.form_title = _("Edit EMA")
+
+        self.action_url = reverse("ema:edit", args=(self.instance.id,))
+        self.cancel_redirect = reverse("ema:open", args=(self.instance.id,))
+
+        self.fields["identifier"].widget.attrs["url"] = reverse_lazy("ema:new-id")
+        self.fields["title"].widget.attrs["placeholder"] = _("Compensation XY; Location ABC")
+
+        # Initialize form data
+        form_data = {
+            "identifier": self.instance.identifier,
+            "title": self.instance.title,
+            "handler": self.instance.responsible.handler,
+            "conservation_office": self.instance.responsible.conservation_office,
+            "conservation_file_number": self.instance.responsible.conservation_file_number,
+            "fundings": self.instance.fundings.all(),
+            "comment": self.instance.comment,
+        }
+        disabled_fields = []
+        self.load_initial_data(
+            form_data,
+            disabled_fields
+        )
+
+    def save(self, user: User, geom_form: SimpleGeomForm):
+        with transaction.atomic():
+            # Fetch data from cleaned POST values
+            identifier = self.cleaned_data.get("identifier", None)
+            title = self.cleaned_data.get("title", None)
+            fundings = self.cleaned_data.get("fundings", None)
+            handler = self.cleaned_data.get("handler", None)
+            conservation_office = self.cleaned_data.get("conservation_office", None)
+            conservation_file_number = self.cleaned_data.get("conservation_file_number", None)
+            comment = self.cleaned_data.get("comment", None)
+
+            # Create log entry
+            action = UserActionLogEntry.objects.create(
+                user=user,
+                action=UserAction.EDITED,
+            )
+            # Process the geometry form
+            geometry = geom_form.save(action)
+
+            # Update responsible data
+            self.instance.responsible.handler = handler
+            self.instance.responsible.conservation_office = conservation_office
+            self.instance.responsible.conservation_file_number = conservation_file_number
+            self.instance.responsible.save()
+
+            # Update main oject data
+            self.instance.identifier = identifier
+            self.instance.title = title
+            self.instance.geometry = geometry
+            self.instance.comment = comment
+            self.instance.modified = action
+            self.instance.save()
+            self.instance.fundings.set(fundings)
+
+            # Add the log entry to the main objects log list
+            self.instance.log.add(action)
+        return self.instance