AppDaemon Reminder app

reminder.py

import hassapi as hass
import datetime

class reminder(hass.Hass):

    def initialize(self):
        self.set_namespace("reminder")
        self.listen_event(self.set_reminder,'set_reminder', namespace='default')
        self.listen_event(self.remove_reminder,'remove_reminder', namespace='default')
        domain = 'reminder'
        reminder_list = list(self.get_state(domain).keys())
        if len(reminder_list) > 0:
            for reminder in reminder_list:
                time = self.parse_datetime(self.get_state(reminder))
                att = self.get_state(reminder, attribute='all')
                dt = datetime.datetime.now()
                if dt.timestamp() > time.timestamp():
                    self.remove_entity(reminder, namespace='default')
                    self.remove_entity(reminder, namespace='reminder')
                else:
                    self.run_at(self.send_reminder, time, entity_id = reminder)
                    self.set_state(**att, namespace='default')
                    self.log('Subscribed to ' + reminder)

    def set_reminder(self, event, data, kwargs):
        """Creates Reminder Entities to Track"""
        if 'name' in data and 'time' in data and 'title' in data and 'recipient' in data and 'message' in data:
            entity_name = 'reminder.' + data['name']
            entity_name = entity_name.replace(" ", "_")
        else:
            self.log('No reminder name defined, exiting')
            return
        self.set_state(entity_name, state=data['time'],  attributes = { 
            "message": data['message'],
            "title": data['title'],
            "recipient": data['recipient']}, namespace='default')
        self.add_entity(entity_name, state=data['time'],  attributes = { 
            "message": data['message'],
            "title": data['title'],
            "recipient": data['recipient']}, namespace='reminder')
        self.restart_app(self.name)

    def send_reminder(self, kwargs):
        """Sends reminder then deletes entity"""
        self.log('send_reminder')
        state=self.get_state(kwargs['entity_id'], attribute="all")
        attributes = state['attributes']
        self.notify(attributes['message'], title = attributes['title'], name = attributes['recipient'], namespace='default')
        self.remove_entity(kwargs['entity_id'], namespace='default')
        self.remove_entity(kwargs['entity_id'], namespace='reminder')

    def remove_reminder (self, event, data, kwargs):
        self.remove_entity(data['entity_id'], namespace='default')
        self.remove_entity(data['entity_id'], namespace='reminder')
        self.restart_app(self.name)

I added some gists for the UI stuff. There are 2 scripts and an automation. The automation builds and maintains an input select with a list of the active reminders. However in the UI I use a custom card called autoentities that just populates any active reminders.

Automation:
https://gist.github.com/haberda/e107c442dee75c58bcd2db322da3a17e

Sctipts:
https://gist.github.com/haberda/b509816370af6c421b36dc8049a0a47f

UI:
https://gist.github.com/haberda/07a3a28e4bd2efc82754382cc0fe34d0

It could be done better, but this works for now. The automation, scripts, and helpers should probably be in a package for distribution, but none of this is required to make the appdaemon app work so I never packaged it up.