#146 Team leave

* adds button and functionality for leaving a team
   * if the admin leaves the team, another user will be chosen as new admin automatically
* improves Team (django) admin backend
   * better control over user adding-removing
   * only added team members are selectable as admin

user/admin.py

@@ -74,6 +74,15 @@ class TeamAdmin(admin.ModelAdmin):
         "name",
         "description",
     ]
+    filter_horizontal = [
+        "users"
+    ]
+
+    def formfield_for_foreignkey(self, db_field, request, **kwargs):
+        if db_field.name == "admin":
+            team_id = request.resolver_match.kwargs.get("object_id", None)
+            kwargs["queryset"] = User.objects.filter(teams__id__in=[team_id])
+        return super().formfield_for_foreignkey(db_field, request, **kwargs)
 
 
 admin.site.register(User, UserAdmin)

user/forms.py

@@ -317,6 +317,15 @@ class RemoveTeamModalForm(RemoveModalForm):
     pass
 
 
+class LeaveTeamModalForm(RemoveModalForm):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.form_title = _("Leave team")
+
+    def save(self):
+        self.instance.remove_user(self.user)
+
+
 class TeamDataForm(BaseModalForm):
     name = forms.CharField(
         label_suffix="",

user/models/team.py

@@ -93,3 +93,17 @@ class Team(UuidModel):
         """
         mailer = Mailer()
         mailer.send_mail_shared_data_deleted_team(obj_identifier, obj_title, self)
+
+    def remove_user(self, user):
+        """ Removes a user from the team
+
+        Args:
+            user (User): The user to be removed
+
+        Returns:
+
+        """
+        self.users.remove(user)
+        if self.admin == user:
+            self.admin = self.users.first()
+            self.save()

user/templates/user/team/index.html

@@ -46,6 +46,9 @@
                             {% endfor %}
                         </td>
                         <td>
+                            <button class="btn rlp-r btn-modal" data-form-url="{% url 'user:team-leave' team.id %}" title="{% trans 'Leave team' %}">
+                                {% fa5_icon 'sign-out-alt' %}
+                            </button>
                             {% if team.admin == user %}
                                 <button class="btn rlp-r btn-modal" data-form-url="{% url 'user:team-edit' team.id %}" title="{% trans 'Edit team' %}">
                                     {% fa5_icon 'edit' %}

user/urls.py

@@ -20,5 +20,6 @@ urlpatterns = [
     path("team/<id>", data_team_view, name="team-data"),
     path("team/<id>/edit", edit_team_view, name="team-edit"),
     path("team/<id>/remove", remove_team_view, name="team-remove"),
+    path("team/<id>/leave", leave_team_view, name="team-leave"),
 
 ]

user/views.py

@@ -13,7 +13,7 @@ from django.utils.translation import gettext_lazy as _
 from konova.contexts import BaseContext
 from konova.decorators import any_group_check, default_group_required
 from user.forms import UserNotificationForm, UserContactForm, UserAPITokenForm, NewTeamModalForm, EditTeamModalForm, \
-    RemoveTeamModalForm, TeamDataForm
+    RemoveTeamModalForm, TeamDataForm, LeaveTeamModalForm
 
 
 @login_required
@@ -204,3 +204,24 @@ def remove_team_view(request: HttpRequest, id: str):
         _("Team removed"),
         redirect_url=reverse("user:team-index")
     )
+
+
+@login_required
+def leave_team_view(request: HttpRequest, id: str):
+    team = get_object_or_404(Team, id=id)
+    user = request.user
+
+    is_user_team_member = team.users.filter(id=user.id).exists()
+    if not is_user_team_member:
+        messages.info(
+            request,
+            _("You are not a member of this team")
+        )
+        return redirect("user:team-index")
+
+    form = LeaveTeamModalForm(request.POST or None, instance=team, request=request)
+    return form.process_request(
+        request,
+        _("Left Team"),
+        redirect_url=reverse("user:team-index")
+    )