show barmen logged on current device in counter

counter/forms.py

@@ -9,6 +9,7 @@ from django import forms
 from django.core.exceptions import ValidationError
 from django.db.models import Exists, OuterRef, Q
 from django.forms import BaseModelFormSet
+from django.http import HttpRequest
 from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _
 from django_celery_beat.models import ClockedSchedule
@@ -131,9 +132,18 @@ class GetUserForm(forms.Form):
 
 
 class CounterLoginForm(LoginForm):
-    def __init__(self, *args, counter: Counter, **kwargs):
+    """LoginForm to log a barman in a counter.
+
+    To be able to log in a counter, a user must :
+
+    - be part of the sellers of the given counter
+    - not being already logged in any counter
+    """
+
+    def __init__(self, *args, request: HttpRequest, counter: Counter, **kwargs):
         super().__init__(*args, **kwargs)
         self.counter = counter
+        self.request = request
 
     def confirm_login_allowed(self, user: User):
         super().confirm_login_allowed(user)
@@ -141,11 +151,13 @@ class CounterLoginForm(LoginForm):
             raise ValidationError(
                 message=_("You are not a barman of this counter."), code="not_barman"
             )
-        if user in self.counter.barmen_list:
+        if user in self.request.barmen:
-            raise ValidationError(
+            message = (
-                message=_("You are already logged in this counter."),
+                _("You are already logged in this counter.")
-                code="not_logged_in",
+                if user in self.counter.barmen_list
+                else _("You are already logged in another counter.")
             )
+            raise ValidationError(message=message, code="already_logged_in")
 
 
 class RefillForm(forms.ModelForm):

counter/templates/counter/counter_main.jinja

@@ -44,10 +44,35 @@
     {% endif %}
   </div>
   {% if counter.type == 'BAR' %}
-    <h3>{% trans %}Barman: {% endtrans %}</h3>
+    <h3>{% trans %}Barmen:{% endtrans %}</h3>
+
+    {% if barmen_here %}
+      <div class="row gap-2x">
+        <div>
+          <h4>{% trans %}On this device{% endtrans %}</h4>
+          {% for b in barmen_here %}
+            <p>{{ barman_logout_link(b) }}</p>
+          {% endfor %}
+        </div>
+        <div>
+          <h4>{% trans %}Elsewhere{% endtrans %}</h4>
+          {% if barmen_here|length == barmen|length %}
+            {# all logged barmen are logged in this session #}
+            <p><em>{% trans %}No barman logged elsewhere{% endtrans %}</em></p>
+          {% else %}
+            {% for b in barmen %}
+              {%- if b not in barmen_here -%}
+                <p>{{ barman_logout_link(b) }}</p>
+              {%- endif -%}
+            {% endfor %}
+          {% endif %}
+        </div>
+      </div>
+    {% else %}
       {% for b in barmen %}
         <p>{{ barman_logout_link(b) }}</p>
       {% endfor %}
+    {% endif %}
     {{ login_fragment }}
   {% endif %}
 {% endblock %}

counter/views/home.py

@@ -46,9 +46,12 @@ class CounterLoginFragment(FragmentMixin, SingleObjectMixin, FormView):
         return super().dispatch(request, *args, **kwargs)
 
     def get_form_kwargs(self):
-        return super().get_form_kwargs() | {"counter": self.object}
+        return super().get_form_kwargs() | {
+            "request": self.request,
+            "counter": self.object,
+        }
 
-    def form_valid(self, form: CounterLoginForm):
+    def form_valid(self, form: GetUserForm):
         user = form.get_user()
         self.object.permanencies.create(user=user, start=timezone.now())
         self.request.barmen.add(user)
@@ -82,7 +85,7 @@ class CounterMain(
     """The public (barman) view."""
 
     model = Counter
-    queryset = Counter.objects.annotate_is_open().exclude(type="EBOUTIC")
+    queryset = Counter.objects.exclude(type="EBOUTIC")
     template_name = "counter/counter_main.jinja"
     pk_url_kwarg = "counter_id"
     form_class = GetUserForm
@@ -111,9 +114,11 @@ class CounterMain(
         kwargs = super().get_context_data(**kwargs)
         if self.object.type == "BAR":
             kwargs["barmen"] = self.object.barmen_list
+            kwargs["barmen_here"] = list(
+                self.request.barmen.intersection(self.object.barmen_list)
+            )
         kwargs["can_click"] = (
             self.object.type == "BAR"
-            and self.object.is_open
             and self.request.barmen
             and self.request.barmen.issubset(set(self.object.barmen_list))
         ) or (
@@ -132,7 +137,7 @@ class CounterMain(
             )
         return kwargs
 
-    def form_valid(self, form: CounterLoginForm):
+    def form_valid(self, form: GetUserForm):
         """We handle here the redirection, passing the user id of the asked customer."""
         self.success_url = reverse(
             "counter:click",