Add a "naps" card.

dashboard/templates/cards/sleep_naps_day.html

@@ -0,0 +1,22 @@
+{% extends 'cards/sleep.html' %}
+{% load duration %}
+
+{% block header %}Today's Naps{% endblock %}
+
+{% block title %}
+    {% if count %}
+        <strong>{{ count }} naps</strong>
+    {% else %}
+        <i class="icon icon-sad" aria-hidden="true"></i>
+        <strong>None yet today</strong>
+        <i class="icon icon-sad" aria-hidden="true"></i>
+    {% endif %}
+{% endblock %}
+
+{% block content %}
+    <div class="text-muted">
+        {{ total.duration__sum|duration_string }}
+    </div>
+{% endblock %}
+
+{% block footer %}<em>Naps are sleep entries starting 7AM - 7PM.</em>{% endblock %}

dashboard/templates/dashboard/child.html

@@ -19,6 +19,7 @@
         <div class="col-lg-4 col-md-6 col-sm-12">
             {% card_sleep_last object %}
             {% card_sleep_day object %}
+            {% card_sleep_naps_day object %}
             {% card_tummytime_day object %}
         </div>
         <div class="col-lg-4 col-md-6 col-sm-12">

dashboard/templatetags/cards.py

@@ -2,6 +2,7 @@
 from __future__ import unicode_literals
 
 from django import template
+from django.db.models import Sum
 from django.utils import timezone
 
 from core.models import DiaperChange, Feeding, Sleep, Timer, TummyTime
@@ -103,12 +104,25 @@ def card_sleep_day(child, date=None):
         total += end - start
 
     count = len(instances)
-    if count > 0:
-        average = total/count
-    else:
-        average = 0
 
-    return {'total': total, 'count': count, 'average': average}
+    return {'total': total, 'count': count}
+
+
+@register.inclusion_tag('cards/sleep_naps_day.html')
+def card_sleep_naps_day(child, date=None):
+    """Nap information for the current day.
+    """
+    local = timezone.localtime(date)
+    start_lower = local.replace(
+        hour=7, minute=0, second=0).astimezone(timezone.utc)
+    start_upper = local.replace(
+        hour=19, minute=0, second=0).astimezone(timezone.utc)
+    instances = Sleep.objects.filter(child=child) \
+        .filter(start__gte=start_lower, start__lte=start_upper)
+    return {
+        'total': instances.aggregate(Sum('duration')),
+        'count': len(instances)
+    }
 
 
 @register.inclusion_tag('cards/timer_list.html')