Add Timer model.

This will used for creating timers in the app and (eventually) applying them to entries during create operations.

api/serializers.py

@@ -3,7 +3,8 @@ from __future__ import unicode_literals
 
 from rest_framework import serializers
 
-from core.models import Child, DiaperChange, Feeding, Note, Sleep, TummyTime
+from core.models import (Child, DiaperChange, Feeding, Note, Sleep, Timer,
+                         TummyTime)
 
 
 class ChildSerializer(serializers.HyperlinkedModelSerializer):
@@ -37,6 +38,12 @@ class SleepSerializer(serializers.HyperlinkedModelSerializer):
         fields = ('baby', 'start', 'end', 'duration')
 
 
+class TimerSerializer(serializers.HyperlinkedModelSerializer):
+    class Meta:
+        model = Timer
+        fields = ('name', 'start', 'end', 'duration', 'active')
+
+
 class TummyTimeSerializer(serializers.HyperlinkedModelSerializer):
     class Meta:
         model = TummyTime

api/urls.py

@@ -5,7 +5,7 @@ from django.conf.urls import url, include
 from rest_framework import routers
 
 from .views import (ChildViewSet, DiaperChangeViewSet, FeedingViewSet,
-                    NoteViewSet, SleepViewSet, TummyTimeViewSet)
+                    NoteViewSet, SleepViewSet, TimerViewSet, TummyTimeViewSet)
 
 router = routers.DefaultRouter()
 router.register(r'children', ChildViewSet)
@@ -13,6 +13,7 @@ router.register(r'diaper-changes', DiaperChangeViewSet)
 router.register(r'feedings', FeedingViewSet)
 router.register(r'notes', NoteViewSet)
 router.register(r'sleep', SleepViewSet)
+router.register(r'timers', TimerViewSet)
 router.register(r'tummy-times', TummyTimeViewSet)
 
 urlpatterns = [

api/views.py

@@ -3,11 +3,13 @@ from __future__ import unicode_literals
 
 from rest_framework import viewsets
 
-from core.models import Child, DiaperChange, Feeding, Note, Sleep, TummyTime
+from core.models import (Child, DiaperChange, Feeding, Note, Sleep, Timer,
+                         TummyTime)
 from core.utils import filter_by_params
+
 from .serializers import (ChildSerializer, DiaperChangeSerializer,
                           FeedingSerializer, NoteSerializer, SleepSerializer,
-                          TummyTimeSerializer,)
+                          TimerSerializer, TummyTimeSerializer,)
 
 
 class ChildViewSet(viewsets.ModelViewSet):
@@ -55,6 +57,15 @@ class SleepViewSet(viewsets.ModelViewSet):
         return filter_by_params(self.request, Sleep, params)
 
 
+class TimerViewSet(viewsets.ModelViewSet):
+    queryset = Timer.objects.all()
+    serializer_class = TimerSerializer
+
+    def get_queryset(self):
+        params = ['name', 'active']
+        return filter_by_params(self.request, Timer, params)
+
+
 class TummyTimeViewSet(viewsets.ModelViewSet):
     queryset = TummyTime.objects.all()
     serializer_class = TummyTimeSerializer

core/admin.py

@@ -3,7 +3,8 @@ from __future__ import unicode_literals
 
 from django.contrib import admin
 
-from .models import Child, DiaperChange, Feeding, Note, Sleep, TummyTime
+from .models import (Child, DiaperChange, Feeding, Note, Sleep, Timer,
+                     TummyTime)
 
 
 @admin.register(Child)
@@ -43,6 +44,13 @@ class SleepAdmin(admin.ModelAdmin):
     search_fields = ('child__first_name', 'child__last_name',)
 
 
+@admin.register(Timer)
+class TimerAdmin(admin.ModelAdmin):
+    list_display = ('name', 'start', 'end', 'duration', 'active',)
+    list_filter = ('active',)
+    search_fields = ('name',)
+
+
 @admin.register(TummyTime)
 class TummyTimeAdmin(admin.ModelAdmin):
     list_display = ('start', 'end', 'duration', 'child', 'milestone',)

core/models.py

@@ -2,6 +2,7 @@
 from __future__ import unicode_literals
 
 from django.db import models
+from django.utils import timezone
 
 from .utils import duration_string
 
@@ -41,7 +42,8 @@ class DiaperChange(models.Model):
         ordering = ['-time']
 
     def __str__(self):
-        return 'Diaper change for {} on {}'.format(self.child, self.time.date())
+        return 'Diaper change for {} on {}'.format(
+            self.child, self.time.date())
 
 
 class Feeding(models.Model):
@@ -108,6 +110,29 @@ class Sleep(models.Model):
         return duration_string(self.start, self.end)
 
 
+class Timer(models.Model):
+    name = models.CharField(max_length=255, blank=True)
+    start = models.DateTimeField(auto_now=True)
+    end = models.DateTimeField(blank=True, null=True, editable=False)
+    active = models.BooleanField(default=True, editable=False)
+
+    objects = models.Manager()
+
+    class Meta:
+        default_permissions = ('view', 'add', 'change', 'delete')
+        ordering = ['active', '-start']
+
+    def __str__(self):
+        return 'Timer ({})'.format(self.name)
+
+    def duration(self):
+        return duration_string(self.start, self.end or timezone.now())
+
+    def save(self, *args, **kwargs):
+        self.active = self.end is None
+        super(Timer, self).save(*args, **kwargs)
+
+
 class TummyTime(models.Model):
     child = models.ForeignKey('Child', related_name='tummy_time')
     start = models.DateTimeField(blank=False, null=False)

core/templates/core/base.html

@@ -19,7 +19,7 @@
 </head>
 <body style="padding-top: 5rem;">
 <nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
-    <a class="navbar-brand" href="#"><span class="text-info">Baby</span> Blotter</a>
+    <a class="navbar-brand" href="/"><span class="text-info">Baby</span> Blotter</a>
     <button class="navbar-toggler" type="button" data-toggle="collapse"
             data-target="#navbarsExampleDefault"
             aria-controls="navbarsExampleDefault" aria-expanded="false"