def timesheet():
"""
Calculate the total amount of lesson time.
"""
# Create new form objects for minimum and maximum dates.
select_date_form = SelectMinMaxDateForm()
# Set lessons and hours worked to None.
time_sheet_lessons = time_sheet_time = None
if request.method == 'POST' and select_date_form.validate_on_submit():
# Set the min and max dates to the dates on the form.
min_date = select_date_form.min_date.data
max_date = select_date_form.max_date.data
else:
# This month.
min_date = datetime.now() - timedelta(days=30)
max_date = datetime.now()
# Set the form defaults to these dates.
select_date_form.min_date.default = min_date
select_date_form.max_date.default = max_date
# Process the form to update.
select_date_form.process()
# Select the lessons
time_sheet_lessons = generate_timesheet(
current_user, min_date, max_date
)
# Total the seconds worked.
time_sheet_time = total_time(time_sheet_lessons)
# Return the template with the data.
return render_template(
'tutor/timesheet.html', time_sheet_lessons=time_sheet_lessons,
time_sheet_time=time_sheet_time, select_date_form=select_date_form
)
