#101 Team sharing tests

* adds tests for team sharing
* extends the API for team sharing support
* adds shared_teams property shortcut for ShareableObjectMixin
* adds full support for team-based sharing to all views and functions
* simplifies ShareModalForm
* adds/updates translations

intervention/forms/modalForms.py

@@ -9,7 +9,7 @@ from dal import autocomplete
 from django.core.exceptions import ObjectDoesNotExist
 
 from konova.utils.message_templates import DEDUCTION_ADDED, REVOCATION_ADDED, DEDUCTION_REMOVED, DEDUCTION_EDITED, \
-    REVOCATION_EDITED
+    REVOCATION_EDITED, ENTRY_REMOVE_MISSING_PERMISSION
 from user.models import User, Team
 from user.models import UserActionLogEntry
 from django.db import transaction
@@ -37,7 +37,7 @@ class ShareModalForm(BaseModalForm):
             }
         )
     )
-    team_select = forms.ModelMultipleChoiceField(
+    teams = forms.ModelMultipleChoiceField(
         label=_("Add team to share with"),
         label_suffix="",
         help_text=_("Multiple selection possible - You can only select teams which do not already have access."),
@@ -51,7 +51,7 @@ class ShareModalForm(BaseModalForm):
             },
         ),
     )
-    user_select = forms.ModelMultipleChoiceField(
+    users = forms.ModelMultipleChoiceField(
         label=_("Add user to share with"),
         label_suffix="",
         help_text=_("Multiple selection possible - You can only select users which do not already have access. Enter the full username."),
@@ -63,21 +63,8 @@ class ShareModalForm(BaseModalForm):
                 "data-placeholder": _("Click for selection"),
                 "data-minimum-input-length": 3,
             },
-            forward=["users"]
         ),
     )
-    users = forms.MultipleChoiceField(
-        label=_("Shared with"),
-        label_suffix="",
-        required=True,
-        help_text=_("Remove check to remove access for this user"),
-        widget=forms.CheckboxSelectMultiple(
-            attrs={
-                "class": "list-unstyled",
-            }
-        ),
-        choices=[]
-    )
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -91,6 +78,48 @@ class ShareModalForm(BaseModalForm):
 
         self._init_fields()
 
+    def _user_team_valid(self):
+        """ Checks whether users and teams have been removed by the user and if the user is allowed to do so or not
+
+        Returns:
+
+        """
+        users = self.cleaned_data.get("users", User.objects.none())
+        teams = self.cleaned_data.get("teams", Team.objects.none())
+
+        _is_valid = True
+        if is_default_group_only(self.user):
+            shared_users = self.instance.shared_users
+            shared_teams = self.instance.shared_teams
+
+            shared_users_are_removed = not set(shared_users).issubset(users)
+            shared_teams_are_removed = not set(shared_teams).issubset(teams)
+
+            if shared_users_are_removed:
+                self.add_error(
+                    "users",
+                    ENTRY_REMOVE_MISSING_PERMISSION
+                )
+                _is_valid = False
+            if shared_teams_are_removed:
+                self.add_error(
+                    "teams",
+                    ENTRY_REMOVE_MISSING_PERMISSION
+                )
+                _is_valid = False
+        return _is_valid
+
+    def is_valid(self):
+        """ Extended validity check
+
+        Returns:
+
+        """
+        super_valid = super().is_valid()
+        user_team_valid = self._user_team_valid()
+        _is_valid = super_valid and user_team_valid
+        return _is_valid
+
     def _init_fields(self):
         """ Wraps initializing of fields
 
@@ -105,39 +134,12 @@ class ShareModalForm(BaseModalForm):
             self.share_link
         )
 
-        # Initialize users field
-        # Disable field if user is not in registration or conservation group
-        if is_default_group_only(self.request.user):
-            self.disable_form_field("users")
-
-        self._add_user_choices_to_field()
-        self._add_teams_to_field()
-
-    def _add_teams_to_field(self):
         form_data = {
-            "team_select": self.instance.teams.all()
+            "teams": self.instance.teams.all(),
+            "users": self.instance.users.all(),
         }
         self.load_initial_data(form_data)
 
-    def _add_user_choices_to_field(self):
-        """ Transforms the instance's sharing users into a list for the form field
-
-        Returns:
-
-        """
-        users = self.instance.users.all()
-        choices = []
-        for n in users:
-            choices.append(
-                (n.id, n.username)
-            )
-        self.fields["users"].choices = choices
-        u_ids = list(users.values_list("id", flat=True))
-        self.initialize_form_field(
-            "users",
-            u_ids
-        )
-
     def save(self):
         self.instance.update_sharing_user(self)