Use day precision for child age (#167)

core/templates/core/child_detail.html

@@ -1,5 +1,5 @@
 {% extends 'babybuddy/page.html' %}
-{% load i18n static thumbnail %}
+{% load i18n static thumbnail duration %}
 
 {% block title %}{{ object }}{% endblock %}
 
@@ -21,7 +21,7 @@
                 <div class="child-name display-4">{{ object }}</div>
                 <p class="lead">
                     {% trans "Born" %} <span class="text-secondary">{{ object.birth_date }}</span><br/>
-                    {% trans "Age" %} <span class="text-secondary">{{ object.birth_date|timesince }}</span>
+                    {% trans "Age" %} <span class="text-secondary">{{ object.birth_date|child_age_string }}</span>
                 </p>
                 {% include 'dashboard/child_button_group.html' %}
             </div>

core/templatetags/duration.py

@@ -1,12 +1,27 @@
 # -*- coding: utf-8 -*-
 from django import template
 
-from core.utils import duration_parts, duration_string as d_string
+from core import utils
 
 
 register = template.Library()
 
 
+@register.filter
+def child_age_string(birth_date):
+    """
+    Format a Child's age with monkey-patched timesince.
+    :param birth_date: datetime instance
+    :return: a string representation of time since `birth_date`.
+    """
+    if not birth_date:
+        return ''
+    try:
+        return utils.child_age_string(birth_date)
+    except (ValueError, TypeError):
+        return ''
+
+
 @register.filter
 def duration_string(duration, precision='s'):
     """
@@ -19,7 +34,7 @@ def duration_string(duration, precision='s'):
     if not duration:
         return ''
     try:
-        return d_string(duration, precision)
+        return utils.duration_string(duration, precision)
     except (ValueError, TypeError):
         return ''
 
@@ -34,7 +49,7 @@ def hours(duration):
     if not duration:
         return 0
     try:
-        h, m, s = duration_parts(duration)
+        h, m, s = utils.duration_parts(duration)
         return h
     except (ValueError, TypeError):
         return 0
@@ -50,7 +65,7 @@ def minutes(duration):
     if not duration:
         return 0
     try:
-        h, m, s = duration_parts(duration)
+        h, m, s = utils.duration_parts(duration)
         return m
     except (ValueError, TypeError):
         return 0
@@ -66,7 +81,7 @@ def seconds(duration):
     if not duration:
         return 0
     try:
-        h, m, s = duration_parts(duration)
+        h, m, s = utils.duration_parts(duration)
         return s
     except (ValueError, TypeError):
         return 0

core/tests/tests_templatetags.py

@@ -16,6 +16,12 @@ class TemplateTagsTestCase(TestCase):
             bootstrap.bool_icon(False),
             '<i class="icon icon-false text-danger" aria-hidden="true"></i>')
 
+    def test_child_age_string(self):
+        date = timezone.localdate() - timezone.timedelta(days=0, hours=6)
+        self.assertEqual('0\xa0days', duration.child_age_string(date))
+        date = timezone.localdate() - timezone.timedelta(days=1, hours=6)
+        self.assertEqual('1\xa0day', duration.child_age_string(date))
+
     def test_duration_duration_string(self):
         delta = timezone.timedelta(hours=1, minutes=30, seconds=15)
         self.assertEqual(

core/utils.py

@@ -1,8 +1,20 @@
 # -*- coding: utf-8 -*-
-from django.utils import timezone
+from django.utils import timesince, timezone
 from django.utils.translation import ngettext
 
 
+def child_age_string(duration):
+    """Monkey patch timesince function to day precision only.
+    """
+    timesince.TIMESINCE_CHUNKS = (
+        (60 * 60 * 24 * 365, 'year'),
+        (60 * 60 * 24 * 30, 'month'),
+        (60 * 60 * 24 * 7, 'week'),
+        (60 * 60 * 24, 'day'),
+    )
+    return timesince.timesince(duration)
+
+
 def duration_string(duration, precision='s'):
     """Format hours, minutes and seconds as a human-friendly string (e.g. "2
     hours, 25 minutes, 31 seconds") with precision to h = hours, m = minutes or