Make it possible to drop a shift.

src/teams/models.py

@@ -356,3 +356,7 @@ class TeamShift(CampRelatedModel):
             self.shift_range.lower,
             self.shift_range.upper
         )
+
+    @property
+    def users(self):
+        return [member.user for member in self.team_members.all()]

src/teams/templates/team_shift_list.html

@@ -63,7 +63,12 @@
                     <i class="fas fa-trash"></i> Delete
                 </a>
                 {% endif %}
-                {% if shift.people_required > shift.team_members.count %}
+                {% if user in shift.users %}
+                <a class="btn btn-danger"
+                   href="{% url 'teams:shift_member_drop' camp_slug=camp.slug team_slug=team.slug pk=shift.pk %}">
+                    <i class="fas fa-thumbs-down"></i> Drop it!
+                </a>
+                {% elif shift.people_required > shift.team_members.count %}
                 <a class="btn btn-success"
                    href="{% url 'teams:shift_member_take' camp_slug=camp.slug team_slug=team.slug pk=shift.pk %}">
                     <i class="fas fa-thumbs-up"></i> Take it!

src/teams/urls.py

@@ -36,6 +36,7 @@ from teams.views.shifts import (
     ShiftUpdateView,
     ShiftDeleteView,
     MemberTakesShift,
+    MemberDropsShift,
 )
 
 app_name = 'teams'
@@ -186,6 +187,11 @@ urlpatterns = [
                         MemberTakesShift.as_view(),
                         name="shift_member_take"
                     ),
+                    path(
+                        'drop',
+                        MemberDropsShift.as_view(),
+                        name="shift_member_drop"
+                    ),
                 ])),
             ]))
         ]),

src/teams/views/shifts.py

@@ -286,7 +286,7 @@ class ShiftCreateMultipleView(LoginRequiredMixin, CampViewMixin, FormView):
         return context
 
 
-class MemberTakesShift(CampViewMixin, View):
+class MemberTakesShift(LoginRequiredMixin, CampViewMixin, View):
 
     http_methods = ['get']
 
@@ -309,3 +309,28 @@ class MemberTakesShift(CampViewMixin, View):
                 kwargs=kwargs
             )
         )
+
+
+class MemberDropsShift(LoginRequiredMixin, CampViewMixin, View):
+
+    http_methods = ['get']
+
+    def get(self, request, **kwargs):
+        shift = TeamShift.objects.get(id=kwargs['pk'])
+        team = Team.objects.get(
+            camp=self.camp,
+            slug=kwargs['team_slug']
+        )
+
+        team_member = TeamMember.objects.get(team=team, user=request.user)
+
+        shift.team_members.remove(team_member)
+
+        kwargs.pop('pk')
+
+        return HttpResponseRedirect(
+            reverse(
+                'teams:shifts',
+                kwargs=kwargs
+            )
+        )