#7 New Form

* adds NewEcoAccountForm
* refactors NewCompensationForm into AbstractCompensationForm so main fields can be reused again
* fixes template bug in account detail view where the amount of deductions has been displayed instead of the available rest
* refactors _generate_new_identifier() into generate_new_identifier()
* refactors get_available_rest() into returning both, the total and relative amount
* improves saving of SimpleGeometryForm()
* adds/updates translations

compensation/models.py

@@ -185,9 +185,9 @@ class Compensation(AbstractCompensation):
     def save(self, *args, **kwargs):
         if self.identifier is None or len(self.identifier) == 0:
             # Create new identifier
-            new_id = self._generate_new_identifier()
+            new_id = self.generate_new_identifier()
             while Compensation.objects.filter(identifier=new_id).exists():
-                new_id = self._generate_new_identifier()
+                new_id = self.generate_new_identifier()
             self.identifier = new_id
         super().save(*args, **kwargs)
 
@@ -322,9 +322,9 @@ class EcoAccount(AbstractCompensation):
     def save(self, *args, **kwargs):
         if self.identifier is None or len(self.identifier) == 0:
             # Create new identifier
-            new_id = self._generate_new_identifier()
+            new_id = self.generate_new_identifier()
             while EcoAccount.objects.filter(identifier=new_id).exists():
-                new_id = self._generate_new_identifier()
+                new_id = self.generate_new_identifier()
             self.identifier = new_id
         super().save(*args, **kwargs)
 
@@ -355,28 +355,28 @@ class EcoAccount(AbstractCompensation):
         """
         return self.after_states.all().aggregate(Sum("surface"))["surface__sum"] or 0
 
-    def get_available_rest(self, as_percentage: bool = False) -> float:
+    def get_available_rest(self) -> (float, float):
         """ Calculates available rest surface of the eco account
 
         Args:
-            as_percentage (bool): Whether to return the result as m² or %
 
         Returns:
-
+            ret_val_total (float): Total amount
+            ret_val_relative (float): Amount as percentage (0-100)
         """
         deductions = self.deductions.filter(
             intervention__deleted=None,
         )
         deductions_surfaces = deductions.aggregate(Sum("surface"))["surface__sum"] or 0
         available_surfaces = self.deductable_surface or deductions_surfaces ## no division by zero
-        ret_val = available_surfaces - deductions_surfaces
+        ret_val_total = available_surfaces - deductions_surfaces
 
-        if as_percentage:
-            if available_surfaces > 0:
-                ret_val = int((ret_val / available_surfaces) * 100)
-            else:
-                ret_val = 0
-        return ret_val
+        if available_surfaces > 0:
+            ret_val_relative = int((ret_val_total / available_surfaces) * 100)
+        else:
+            ret_val_relative = 0
+
+        return ret_val_total, ret_val_relative
 
     def get_LANIS_link(self) -> str:
         """ Generates a link for LANIS depending on the geometry