Add ability to create instances from timer detail view.

core/forms.py

@@ -2,6 +2,7 @@
 from __future__ import unicode_literals
 
 from django import forms
+from django.utils import timezone
 
 from .models import Child, DiaperChange, Feeding, Sleep, Timer, TummyTime
 
@@ -9,8 +10,31 @@ from .models import Child, DiaperChange, Feeding, Sleep, Timer, TummyTime
 # Sets the default Child instance if only one exists in the database.
 def set_default_child(kwargs):
     instance = kwargs.get('instance', None)
+    if not kwargs.get('initial'):
+        kwargs.update(initial={})
     if instance is None and Child.objects.count() == 1:
-        kwargs.update(initial={'child': Child.objects.first()})
+        kwargs['initial'].update({'child': Child.objects.first()})
+    return kwargs
+
+
+# Uses a timer to set the default start and end date and updates the timer.
+def set_default_duration(kwargs):
+    instance = kwargs.get('instance', None)
+    timer_id = kwargs.get('timer', None)
+    if not kwargs.get('initial'):
+        kwargs.update(initial={})
+    if not instance and timer_id:
+        timer_instance = Timer.objects.get(id=timer_id)
+        timer_instance.end = timezone.now()
+        kwargs['initial'].update({
+            'start': timer_instance.start,
+            'end': timer_instance.end
+        })
+        timer_instance.save()
+    try:
+        kwargs.pop('timer')  # This is not part of the model so must be removed.
+    except KeyError:
+        pass
     return kwargs
 
 
@@ -63,6 +87,7 @@ class FeedingForm(forms.ModelForm):
 
     def __init__(self, *args, **kwargs):
         kwargs = set_default_child(kwargs)
+        kwargs = set_default_duration(kwargs)
         super(FeedingForm, self).__init__(*args, **kwargs)
 
 
@@ -85,6 +110,7 @@ class SleepForm(forms.ModelForm):
 
     def __init__(self, *args, **kwargs):
         kwargs = set_default_child(kwargs)
+        kwargs = set_default_duration(kwargs)
         super(SleepForm, self).__init__(*args, **kwargs)
 
 
@@ -125,4 +151,5 @@ class TummyTimeForm(forms.ModelForm):
 
     def __init__(self, *args, **kwargs):
         kwargs = set_default_child(kwargs)
+        kwargs = set_default_duration(kwargs)
         super(TummyTimeForm, self).__init__(*args, **kwargs)

core/templates/timer_detail.html

@@ -6,14 +6,17 @@
     <div class="jumbotron text-center">
         <h1 class="display-1">{{ object.duration }}</h1>
         <p class="lead text-muted">Started {{ object.start }} by {{ object.user }}</p>
-        <a class="btn btn-success btn-lg btn-block p-3 mb-3" href="{% url 'feeding-add' %}" role="button">
-            <i class="fa fa-spoon" aria-hidden="true"></i> Feeding</a>
-        <a class="btn btn-success btn-lg btn-block p-3 mb-3" href="{% url 'sleep-add' %}" role="button">
-            <i class="fa fa-bed" aria-hidden="true"></i> Sleep</a>
-        <a class="btn btn-success btn-lg btn-block p-3 mb-3" href="{% url 'tummytime-add' %}" role="button">
-            <i class="fa fa-smile-o" aria-hidden="true"></i> Tummy Time</a>
-        <a class="btn btn-danger btn-lg btn-block p-3 mb-3" href="#" role="button">
-            <i class="fa fa-times-circle" aria-hidden="true"></i> Delete Timer</a>
-        </p>
+        <a class="btn btn-success btn-lg btn-block p-3 mb-3"
+           href="{% url 'feeding-add' %}?timer={{ timer.id }}"
+           role="button"><i class="fa fa-spoon" aria-hidden="true"></i> Feeding</a>
+        <a class="btn btn-success btn-lg btn-block p-3 mb-3"
+           href="{% url 'sleep-add' %}?timer={{ timer.id }}"
+           role="button"><i class="fa fa-bed" aria-hidden="true"></i> Sleep</a>
+        <a class="btn btn-success btn-lg btn-block p-3 mb-3"
+           href="{% url 'tummytime-add' %}?timer={{ timer.id }}"
+           role="button"><i class="fa fa-smile-o" aria-hidden="true"></i> Tummy Time</a>
+        <a class="btn btn-danger btn-lg btn-block p-3 mb-3"
+           href="#"
+           role="button"><i class="fa fa-times-circle" aria-hidden="true"></i> Delete Timer</a>
     </div>
 {% endblock %}

core/views.py

@@ -79,6 +79,12 @@ class FeedingAdd(PermissionRequiredMixin, CreateView):
     form_class = FeedingForm
     success_url = '/feedings'
 
+    def get_form_kwargs(self):
+        kwargs = super(FeedingAdd, self).get_form_kwargs()
+        # Add timer to be used by FeedingForm.__init__
+        kwargs.update({'timer': self.request.GET.get('timer', None)})
+        return kwargs
+
 
 class FeedingUpdate(PermissionRequiredMixin, UpdateView):
     model = Feeding
@@ -129,6 +135,12 @@ class SleepAdd(PermissionRequiredMixin, CreateView):
     form_class = SleepForm
     success_url = '/sleep'
 
+    def get_form_kwargs(self):
+        kwargs = super(SleepAdd, self).get_form_kwargs()
+        # Add timer to be used by SleepForm.__init__
+        kwargs.update({'timer': self.request.GET.get('timer', None)})
+        return kwargs
+
 
 class SleepUpdate(PermissionRequiredMixin, UpdateView):
     model = Sleep
@@ -188,6 +200,12 @@ class TummyTimeAdd(PermissionRequiredMixin, CreateView):
     form_class = TummyTimeForm
     success_url = '/tummy-time'
 
+    def get_form_kwargs(self):
+        kwargs = super(TummyTimeAdd, self).get_form_kwargs()
+        # Add timer to be used by TummyTimeForm.__init__
+        kwargs.update({'timer': self.request.GET.get('timer', None)})
+        return kwargs
+
 
 class TummyTimeUpdate(PermissionRequiredMixin, UpdateView):
     model = TummyTime