Notify workrave timers

workrave-notification.service

# /home/pieter/.config/systemd/user/workrave-notification.service
[Unit]
Description=Show a notification with the remaining Workrave time

[Service]
ExecStart=python /home/pieter/v/python/workrave-timer.py

[Install]
WantedBy=multi-user.target

workrave-notification.timer

.config/systemd/user/workrave-notification.timer
[Unit]
Description=Show notification with Workrave timers every minute

[Timer]
OnCalendar=*:*:0
Persistent=true     

[Install]
WantedBy=timers.target

workrave-timer.py

from pydbus import SessionBus
from datetime import timedelta
import psutil

# Only notify if the user is logged in.
user_logged_in = False
for user in psutil.users():
  if user.name == 'pieter':
    user_logged_in = True
    break

if not user_logged_in:
  exit(0)

# Only notify if workrave is running.
workrave_running = False
for proc in psutil.process_iter(attrs=['name']):
  if proc.info['name'] == 'workrave':
    workrave_running = True
    break

if not workrave_running:
  exit(0)

bus = SessionBus()

# For documentation on the DBus interface for Workrave, see
# https://github.com/rcaelers/workrave/blob/branch_v1_10/backend/src/workrave-service.xml
workrave = bus.get('org.workrave.Workrave', '/org/workrave/Workrave/Core')
microbreak_remaining = timedelta(seconds=workrave.GetTimerRemaining('microbreak'))
restbreak_remaining = timedelta(seconds=workrave.GetTimerRemaining('restbreak'))

# Show a notification with the current remaining time.
notifications = bus.get('.Notifications')
notification = 'Rest: ' + str(restbreak_remaining) + "\nMicro: " + str(microbreak_remaining)
notifications.Notify('workrave-timer', 0, 'dialog-information', 'Workrave', notification, [], {}, 20000)