feat: statistics on diaper change intervals

reports/graphs/__init__.py

@@ -2,8 +2,10 @@
 from .diaperchange_amounts import diaperchange_amounts  # NOQA
 from .diaperchange_lifetimes import diaperchange_lifetimes  # NOQA
 from .diaperchange_types import diaperchange_types  # NOQA
+from .diaperchange_intervals import diaperchange_intervals  # NOQA
 from .feeding_amounts import feeding_amounts  # NOQA
 from .feeding_duration import feeding_duration  # NOQA
+from .feeding_intervals import feeding_intervals  # NOQA
 from .head_circumference_change import head_circumference_change  # NOQA
 from .height_change import height_change  # NOQA
 from .pumping_amounts import pumping_amounts  # NOQA

reports/graphs/diaperchange_intervals.py

@@ -0,0 +1,93 @@
+# -*- coding: utf-8 -*-
+from django.db.models import Count, Case, When
+from django.db.models.functions import TruncDate
+from django.utils.translation import gettext as _
+from django.utils.translation import get_language
+
+import plotly.offline as plotly
+import plotly.graph_objs as go
+
+from core.utils import duration_parts
+
+from reports import utils
+
+
+def diaperchange_intervals(changes):
+    """
+    Create a graph showing intervals of diaper changes.
+    :param changes: a QuerySet of Diaper Change instances.
+    :returns: a tuple of the the graph's html and javascript.
+    """
+
+    changes = changes.order_by("time")
+    intervals = []
+    intervals_solid = []
+    intervals_wet = []
+    last_change = changes.first()
+    for change in changes[1:]:
+        interval = change.time - last_change.time
+        if interval.total_seconds() > 0:
+            intervals.append(interval)
+            if change.solid:
+                intervals_solid.append(interval)
+            if change.wet:
+                intervals_wet.append(interval)
+        last_change = change
+
+    trace_solid = go.Scatter(
+        name=_("Solid"),
+        line=dict(shape="spline"),
+        x=list(changes.values_list("time", flat=True))[1:],
+        y=[i.total_seconds() / 3600 for i in intervals_solid],
+        hoverinfo="text",
+        text=[_duration_string_hms(i) for i in intervals_solid],
+    )
+
+    trace_wet = go.Scatter(
+        name=_("Wet"),
+        line=dict(shape="spline"),
+        x=list(changes.values_list("time", flat=True))[1:],
+        y=[i.total_seconds() / 3600 for i in intervals_wet],
+        hoverinfo="text",
+        text=[_duration_string_hms(i) for i in intervals_wet],
+    )
+
+    trace_total = go.Scatter(
+        name=_("Total"),
+        line=dict(shape="spline"),
+        x=list(changes.values_list("time", flat=True))[1:],
+        y=[i.total_seconds() / 3600 for i in intervals],
+        hoverinfo="text",
+        text=[_duration_string_hms(i) for i in intervals],
+    )
+
+    layout_args = utils.default_graph_layout_options()
+    layout_args["barmode"] = "stack"
+    layout_args["title"] = _("<b>Diaper Change Intervals</b>")
+    layout_args["xaxis"]["title"] = _("Date")
+    layout_args["xaxis"]["rangeselector"] = utils.rangeselector_date()
+    layout_args["yaxis"]["title"] = _("Interval (hours)")
+
+    fig = go.Figure(
+        {
+            "data": [trace_solid, trace_wet, trace_total],
+            "layout": go.Layout(**layout_args),
+        }
+    )
+    output = plotly.plot(
+        fig,
+        output_type="div",
+        include_plotlyjs=False,
+        config={"locale": get_language()},
+    )
+    return utils.split_graph_output(output)
+
+
+def _duration_string_hms(duration):
+    """
+    Format a duration string with hours, minutes and seconds. This is
+    intended to fit better in smaller spaces on a graph.
+    :returns: a string of the form Xm.
+    """
+    h, m, s = duration_parts(duration)
+    return "{}h{}m{}s".format(h, m, s)

reports/graphs/feeding_intervals.py

@@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+from django.db.models import Count, Sum
+from django.db.models.functions import TruncDate
+from django.utils.translation import gettext as _
+
+import plotly.offline as plotly
+import plotly.graph_objs as go
+
+from core.utils import duration_parts
+
+from reports import utils
+
+
+def feeding_intervals(instances):
+    """
+    Create a graph showing intervals of feeding instances over time.
+
+    :param instances: a QuerySet of Feeding instances.
+    :returns: a tuple of the the graph's html and javascript.
+    """
+    totals = instances.annotate(count=Count("id")).order_by("start")
+
+    intervals = []
+    last_feeding = totals.first()
+    for feeding in totals[1:]:
+        interval = feeding.start - last_feeding.start
+        if interval.total_seconds() > 0:
+            intervals.append(interval)
+        last_feeding = feeding
+
+    trace_avg = go.Scatter(
+        name=_("Interval"),
+        line=dict(shape="spline"),
+        x=list(totals.values_list("start", flat=True)),
+        y=[i.total_seconds() / 3600 for i in intervals],
+        hoverinfo="text",
+        text=[_duration_string_hms(i) for i in intervals],
+    )
+
+    layout_args = utils.default_graph_layout_options()
+    layout_args["title"] = _("<b>Feeding intervals</b>")
+    layout_args["xaxis"]["title"] = _("Date")
+    layout_args["xaxis"]["rangeselector"] = utils.rangeselector_date()
+    layout_args["yaxis"]["title"] = _("Feeding interval (hours)")
+
+    fig = go.Figure({"data": [trace_avg], "layout": go.Layout(**layout_args)})
+    output = plotly.plot(fig, output_type="div", include_plotlyjs=False)
+    return utils.split_graph_output(output)
+
+
+def _duration_string_hms(duration):
+    """
+    Format a duration string with hours, minutes and seconds. This is
+    intended to fit better in smaller spaces on a graph.
+    :returns: a string of the form Xm.
+    """
+    h, m, s = duration_parts(duration)
+    return "{}h{}m{}s".format(h, m, s)

reports/templates/reports/diaperchange_intervals.html

@@ -0,0 +1,9 @@
+{% extends 'reports/report_base.html' %}
+{% load i18n %}
+
+{% block title %}{% trans "Diaper Change Intervals" %} - {{ object }}{% endblock %}
+
+{% block breadcrumbs %}
+    {{ block.super }}
+    <li class="breadcrumb-item active" aria-current="page">{% trans "Diaper Change Intervals" %}</li>
+{% endblock %}

reports/templates/reports/feeding_intervals.html

@@ -0,0 +1,9 @@
+{% extends 'reports/report_base.html' %}
+{% load i18n %}
+
+{% block title %}{% trans "Feeding Intervals" %} - {{ object }}{% endblock %}
+
+{% block breadcrumbs %}
+    {{ block.super }}
+    <li class="breadcrumb-item active" aria-current="page">{% trans "Feeding Intervals" %}</li>
+{% endblock %}

reports/templates/reports/report_list.html

@@ -19,9 +19,11 @@ <h1>Reports</h1>
             <a href="{% url 'reports:report-bmi-change-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Body Mass Index (BMI)" %}</a>
             <a href="{% url 'reports:report-diaperchange-amounts-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Diaper Change Amounts" %}</a>
             <a href="{% url 'reports:report-diaperchange-types-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Diaper Change Types" %}</a>
+            <a href="{% url 'reports:report-diaperchange-intervals-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Diaper Intervals" %}</a>
             <a href="{% url 'reports:report-diaperchange-lifetimes-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Diaper Lifetimes" %}</a>
             <a href="{% url 'reports:report-feeding-amounts-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Feeding Amounts" %}</a>
             <a href="{% url 'reports:report-feeding-duration-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Feeding Durations (Average)" %}</a>
+            <a href="{% url 'reports:report-feeding-intervals-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Feeding Intervals" %}</a>
             <a href="{% url 'reports:report-head-circumference-change-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Head Circumference" %}</a>
             <a href="{% url 'reports:report-height-change-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Height" %}</a>
             <a href="{% url 'reports:report-pumping-amounts-child' object.slug %}" class="list-group-item list-group-item-action">{% trans "Pumping Amounts" %}</a>

reports/tests/tests_views.py

@@ -46,11 +46,15 @@ def test_graph_child_views(self):
         self.assertEqual(page.status_code, 200)
         page = self.c.get("{}/changes/types/".format(base_url))
         self.assertEqual(page.status_code, 200)
+        page = self.c.get("{}/changes/intervals/".format(base_url))
+        self.assertEqual(page.status_code, 200)
 
         page = self.c.get("{}/feeding/amounts/".format(base_url))
         self.assertEqual(page.status_code, 200)
         page = self.c.get("{}/feeding/duration/".format(base_url))
         self.assertEqual(page.status_code, 200)
+        page = self.c.get("{}/feeding/intervals/".format(base_url))
+        self.assertEqual(page.status_code, 200)
 
         page = self.c.get("{}/head-circumference/head-circumference/".format(base_url))
         self.assertEqual(page.status_code, 200)

reports/urls.py

@@ -31,6 +31,11 @@
         views.DiaperChangeTypesChildReport.as_view(),
         name="report-diaperchange-types-child",
     ),
+    path(
+        "children/<str:slug>/reports/changes/intervals/",
+        views.DiaperChangeIntervalsChildReport.as_view(),
+        name="report-diaperchange-intervals-child",
+    ),
     path(
         "children/<str:slug>/reports/feeding/amounts/",
         views.FeedingAmountsChildReport.as_view(),
@@ -56,6 +61,11 @@
         views.PumpingAmounts.as_view(),
         name="report-pumping-amounts-child",
     ),
+    path(
+        "children/<str:slug>/reports/feeding/intervals/",
+        views.FeedingIntervalsChildReport.as_view(),
+        name="report-feeding-intervals-child",
+    ),
     path(
         "children/<str:slug>/reports/sleep/pattern/",
         views.SleepPatternChildReport.as_view(),

reports/views.py

@@ -80,7 +80,7 @@ class DiaperChangeTypesChildReport(PermissionRequiredMixin, DetailView):
 
     model = models.Child
     permission_required = ("core.view_child",)
-    template_name = "reports/diaperchange_types.html"
+    template_name = "reports/diaperchange_intervals.html"
 
     def get_context_data(self, **kwargs):
         context = super(DiaperChangeTypesChildReport, self).get_context_data(**kwargs)
@@ -91,6 +91,26 @@ def get_context_data(self, **kwargs):
         return context
 
 
+class DiaperChangeIntervalsChildReport(PermissionRequiredMixin, DetailView):
+    """
+    Graph of diaper change intervals.
+    """
+
+    model = models.Child
+    permission_required = ("core.view_child",)
+    template_name = "reports/diaperchange_intervals.html"
+
+    def get_context_data(self, **kwargs):
+        context = super(DiaperChangeIntervalsChildReport, self).get_context_data(
+            **kwargs
+        )
+        child = context["object"]
+        changes = models.DiaperChange.objects.filter(child=child)
+        if changes:
+            context["html"], context["js"] = graphs.diaperchange_intervals(changes)
+        return context
+
+
 class FeedingAmountsChildReport(PermissionRequiredMixin, DetailView):
     """
     Graph of daily feeding amounts over time.
@@ -137,6 +157,24 @@ def get_context_data(self, **kwargs):
         return context
 
 
+class FeedingIntervalsChildReport(PermissionRequiredMixin, DetailView):
+    """
+    Graph of diaper change intervals.
+    """
+
+    model = models.Child
+    permission_required = ("core.view_child",)
+    template_name = "reports/feeding_intervals.html"
+
+    def get_context_data(self, **kwargs):
+        context = super(FeedingIntervalsChildReport, self).get_context_data(**kwargs)
+        child = context["object"]
+        instances = models.Feeding.objects.filter(child=child)
+        if instances:
+            context["html"], context["js"] = graphs.feeding_intervals(instances)
+        return context
+
+
 class HeadCircumferenceChangeChildReport(PermissionRequiredMixin, DetailView):
     """
     Graph of head circumference change over time.