Group access constraints

* adds new decorators for all three important groups
* reorganize some default group settings for setup_data.py

konova/decorators.py

@@ -13,6 +13,8 @@ from django.shortcuts import redirect
 from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
 
+from konova.settings import DEFAULT_GROUP, ETS_GROUP, ZB_GROUP
+
 
 def staff_required(function):
     """
@@ -41,4 +43,64 @@ def superuser_required(function):
         else:
             messages.info(request, _("You need to be administrator to perform this action!"))
             return redirect(request.META.get("HTTP_REFERER", reverse("home")))
+    return wrap
+
+
+def default_group_required(function):
+    """
+    A decorator for functions which shall only be usable for users of specific groups.
+    Group identifiers can be found in konova/settings.py
+
+    """
+    @wraps(function)
+    def wrap(request, *args, **kwargs):
+        user = request.user
+        has_group = user.groups.filter(
+            name=DEFAULT_GROUP
+        ).exists()
+        if has_group:
+            return function(request, *args, **kwargs)
+        else:
+            messages.info(request, _("You need to be part of another user group."))
+            return redirect(request.META.get("HTTP_REFERER", reverse("home")))
+    return wrap
+
+
+def registration_office_group_required(function):
+    """
+    A decorator for functions which shall only be usable for users of specific groups.
+    Group identifiers can be found in konova/settings.py
+
+    """
+    @wraps(function)
+    def wrap(request, *args, **kwargs):
+        user = request.user
+        has_group = user.groups.filter(
+            name=ZB_GROUP
+        ).exists()
+        if has_group:
+            return function(request, *args, **kwargs)
+        else:
+            messages.info(request, _("You need to be part of another user group."))
+            return redirect(request.META.get("HTTP_REFERER", reverse("home")))
+    return wrap
+
+
+def conservation_office_group_required(function):
+    """
+    A decorator for functions which shall only be usable for users of specific groups.
+    Group identifiers can be found in konova/settings.py
+
+    """
+    @wraps(function)
+    def wrap(request, *args, **kwargs):
+        user = request.user
+        has_group = user.groups.filter(
+            name=ETS_GROUP
+        ).exists()
+        if has_group:
+            return function(request, *args, **kwargs)
+        else:
+            messages.info(request, _("You need to be part of another user group."))
+            return redirect(request.META.get("HTTP_REFERER", reverse("home")))
     return wrap