add initial shift signup flow

shiftregister/app/forms.py

@@ -6,3 +6,7 @@ class RegisterForm(forms.Form):
     # actually verify phone number, lol
     phone =  forms.CharField(max_length=Helper.phone.field.max_length, label='Handynummer fuer Benarchrichtigungen')
     okf = forms.BooleanField(label='Ich moechte SMS erhalten')
+
+# placeholder form for simple submit button use cases so we get csrf protection
+class EmptyForm(forms.Form):
+    pass

shiftregister/app/templates/shift.html

@@ -0,0 +1,18 @@
+{% extends "base.html" %}
+
+{% block title %}Schichtansicht{% endblock %}
+{% block content %}
+{%if is_registered%}
+<div>Du bist zu dieser Schicht angemeldet</div>
+{%endif%}
+Ort: {{shift.room.name}}<br>
+Start: {{shift.start_at}}<br>
+Dauer: {{shift.duration}}<br>
+{%if can_register%}
+<form action="" method="post">
+    {% csrf_token %}
+{{shift_form.as_p}}
+<input type="submit" value="Anmelden">
+</form>
+{%endif%}
+{% endblock %}

shiftregister/app/urls.py

@@ -7,5 +7,5 @@ urlpatterns = [
     path('login/<slug:token>', views.login, name='token_login'),
     path('logout', views.logout, name='token_logout'),
     path('register', views.register, name='register'),
-
+    path('shift/<int:shiftid>', views.shift, name='shift'),
 ]

shiftregister/app/views.py

@@ -1,10 +1,11 @@
 from django.shortcuts import render, redirect, get_object_or_404
-from .models import Shift, LoginToken, Helper
+from .models import Shift, LoginToken, Helper, ShiftRegistration
 import datetime
 from django.db.models import F, Count
-from .forms import RegisterForm
+from .forms import RegisterForm, EmptyForm
 
 def index(request):
+    del request.session['last_seen_shift']
     # dont show shifts starting in <60 minutes?
     # currently only sorts by date
     free_shifts = Shift.objects.annotate(reg_count=Count('shiftregistration')).filter(start_at__gt=datetime.datetime.now(),
@@ -20,6 +21,10 @@ def login(request, token):
         tk.helper.number_validated=True
         tk.helper.save()
     request.session['token'] = token
+    # if the user was viewing a single shift before registering, they probably want to register for that 
+    # shift so we redirect them there.
+    if request.session.get('last_seen_shift'):
+        return redirect('shift', shiftid=request.session['last_seen_shift'])
     return redirect('index')
 
 def logout(request):
@@ -41,6 +46,35 @@ def register(request):
         token = helper.send_confirmation()
         request.session['token'] = token.pk
         return render(request, 'wait_confirmation.html', {'helper':helper})
-        
     context['form']=RegisterForm()
     return render(request, 'register.html', context)
+
+def shift(request, shiftid):
+    shift = get_object_or_404(Shift, pk=shiftid)
+    helper = None
+    context = {  'can_register':False,
+                        'is_registered':False,
+                        'shift':shift,
+                        'shift_form': EmptyForm,
+                    }
+    # this currently ignores date/time
+    request.session['last_seen_shift'] = shiftid
+    if shift.room.required_helpers>shift.shiftregistration_set.count():
+        context['can_register'] = True
+    if request.session.get('token'):
+        helper = LoginToken.objects.get(pk=request.session['token']).helper
+        context['helper'] =helper
+        if ShiftRegistration.objects.filter(shift=shift, helper=helper).count()!=0:
+            context['is_registered']=True
+            context['can_register']=False
+    if request.method=='POST':
+        if EmptyForm(request.POST).is_valid():
+            if not helper:
+                # todo: add flash message that signup is required?
+                return redirect('register')
+            if context['can_register']:
+                s = ShiftRegistration(helper=helper, shift=shift)
+                s.save()
+                # redirect so page can be reloaded without resending post data
+                return redirect('shift', shiftid=shift.pk)
+    return render(request, 'shift.html', context)