mybuddy/reports/graphs/diaperchange_intervals.py

97 lines
3.0 KiB
Python

# -*- 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 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"]["type"] = "date"
layout_args["xaxis"]["autorange"] = True
layout_args["xaxis"]["autorangeoptions"] = utils.autorangeoptions(trace_total.x)
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)