Payments add modal form

* adds help texts to add payment form
* adds removing button for payments
* refactors user fetching into BaseForm
* adds generic RemoveModalForm which is intended to be used for every modal form which shall remove something
* adds translations
* removes unused html
* prepares payment amount field to be able to process german inputs like '1.000,50' which is not the international default

compensation/views.py

@@ -4,11 +4,12 @@ from django.shortcuts import render, get_object_or_404
 from django.utils.translation import gettext_lazy as _
 
 from compensation.forms import NewPaymentForm
-from compensation.models import Compensation, EcoAccount
+from compensation.models import Compensation, EcoAccount, Payment
 from compensation.tables import CompensationTable, EcoAccountTable
 from intervention.models import Intervention
 from konova.contexts import BaseContext
 from konova.decorators import *
+from konova.forms import RemoveModalForm
 
 
 @login_required
@@ -126,7 +127,7 @@ def new_payment_view(request: HttpRequest, intervention_id: str):
     """
     template = "modal/modal_form.html"
     intervention = get_object_or_404(Intervention, id=intervention_id)
-    form = NewPaymentForm(request.POST or None, intervention=intervention, request=request)
+    form = NewPaymentForm(request.POST or None, instance=intervention, user=request.user)
     if request.method == "POST":
         if form.is_valid():
             payment = form.save()
@@ -149,3 +150,41 @@ def new_payment_view(request: HttpRequest, intervention_id: str):
         return render(request, template, context)
     else:
         raise NotImplementedError
+
+
+@login_required
+def payment_remove_view(request: HttpRequest, id: str):
+    """ Renders a modal view for adding new payments
+
+    Args:
+        request (HttpRequest): The incoming request
+        id (str): The payment's id
+
+    Returns:
+
+    """
+    template = "modal/modal_form.html"
+    payment = get_object_or_404(Payment, id=id)
+    form = RemoveModalForm(request.POST or None, instance=payment, user=request.user)
+    if request.method == "POST":
+        if form.is_valid():
+            form.save()
+            messages.success(
+                request,
+                _("Payment removed")
+            )
+            return redirect(request.META.get("HTTP_REFERER", "home"))
+        else:
+            messages.info(
+                request,
+                _("There was an error on this form.")
+            )
+            return redirect(request.META.get("HTTP_REFERER", "home"))
+    elif request.method == "GET":
+        context = {
+            "form": form,
+        }
+        context = BaseContext(request, context).context
+        return render(request, template, context)
+    else:
+        raise NotImplementedError