from __future__ import print_function
import os
import os.path
import pickle
from datetime import datetime, timedelta
from google.auth.transport.requests import Request
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build
#
# Google calendar notifications
#
# Note: Provide a token.pickle file for the service.
# It's created on first run (run from console!) and
# can be copied to another computer.
#
from modules.common.module import BotModule
class MatrixModule(BotModule):
def __init__(self, name):
super().__init__(name)
self.credentials_file = "credentials.json"
self.SCOPES = ['https://www.googleapis.com/auth/calendar.readonly']
self.bot = None
self.service = None
self.calendar_rooms = dict() # Contains room_id -> [calid, calid] ..
def matrix_start(self, bot):
super().matrix_start(bot)
self.bot = bot
creds = None
if not os.path.exists(self.credentials_file) or os.path.getsize(self.credentials_file) == 0:
return # No-op if not set up
if os.path.exists('token.pickle'):
with open('token.pickle', 'rb') as token:
creds = pickle.load(token)
self.logger.info('Loaded existing pickle file')
# If there are no (valid) credentials available, let the user log in.
if not creds or not creds.valid:
self.logger.warn('No credentials or credentials not valid!')
if creds and creds.expired and creds.refresh_token:
creds.refresh(Request())
else:
flow = InstalledAppFlow.from_client_secrets_file(self.credentials_file, self.SCOPES)
# urn:ietf:wg:oauth:2.0:oob
creds = flow.run_local_server(port=0)
# Save the credentials for the next run
with open('token.pickle', 'wb') as token:
pickle.dump(creds, token)
self.logger.info('Pickle saved')
self.service = build('calendar', 'v3', credentials=creds)
try:
calendar_list = self.service.calendarList().list().execute()['items']
self.logger.info(f'Google calendar set up successfully with access to {len(calendar_list)} calendars:\n')
for calendar in calendar_list:
self.logger.info(f"{calendar['summary']} - + {calendar['id']}")
except Exception:
self.logger.error('Getting calendar list failed!')
async def matrix_message(self, bot, room, event):
if not self.service:
await bot.send_text(room, 'Google calendar not set up for this bot.')
return
args = event.body.split()
events = []
calendars = self.calendar_rooms.get(room.room_id) or []
if len(args) == 2:
if args[1] == 'today':
for calid in calendars:
self.logger.info(f'Listing events in cal {calid}')
events = events + self.list_today(calid)
if args[1] == 'list':
await bot.send_text(room, 'Calendars in this room: ' + str(self.calendar_rooms.get(room.room_id)))
return
elif len(args) == 3:
if args[1] == 'add':
bot.must_be_admin(room, event)
calid = args[2]
self.logger.info(f'Adding calendar {calid} to room id {room.room_id}')
if self.calendar_rooms.get(room.room_id):
if calid not in self.calendar_rooms[room.room_id]:
self.calendar_rooms[room.room_id].append(calid)
else:
await bot.send_text(room, 'This google calendar already added in this room!')
return
else:
self.calendar_rooms[room.room_id] = [calid]
self.logger.info(f'Calendars now for this room {self.calendar_rooms.get(room.room_id)}')
bot.save_settings()
await bot.send_text(room, 'Added new google calendar to this room')
return
if args[1] == 'del':
bot.must_be_admin(room, event)
calid = args[2]
self.logger.info(f'Removing calendar {calid} from room id {room.room_id}')
if self.calendar_rooms.get(room.room_id):
self.calendar_rooms[room.room_id].remove(calid)
self.logger.info(f'Calendars now for this room {self.calendar_rooms.get(room.room_id)}')
bot.save_settings()
await bot.send_text(room, 'Removed google calendar from this room')
return
else:
for calid in calendars:
self.logger.info(f'Listing events in cal {calid}')
events = events + self.list_upcoming(calid)
if len(events) > 0:
self.logger.info(f'Found {len(events)} events')
await self.send_events(bot, events, room)
else:
self.logger.info(f'No events found')
await bot.send_text(room, 'No events found, try again later :)')
async def send_events(self, bot, events, room):
for event in events:
start = event['start'].get('dateTime', event['start'].get('date'))
await bot.send_html(room, f'{self.parse_date(start)} <a href="{event["htmlLink"]}">{event["summary"]}</a>',
f'{self.parse_date(start)} {event["summary"]}')
def list_upcoming(self, calid):
startTime = datetime.utcnow()
now = startTime.isoformat() + 'Z'
events_result = self.service.events().list(calendarId=calid, timeMin=now,
maxResults=10, singleEvents=True,
orderBy='startTime').execute()
events = events_result.get('items', [])
return events
def list_today(self, calid):
startTime = datetime.utcnow()
startTime = startTime.replace(hour=0, minute=0, second=0, microsecond=0)
endTime = startTime + timedelta(hours=24)
now = startTime.isoformat() + 'Z'
end = endTime.isoformat() + 'Z'
self.logger.info(f'Looking for events between {now} {end}')
events_result = self.service.events().list(calendarId=calid, timeMin=now,
timeMax=end, maxResults=10, singleEvents=True,
orderBy='startTime').execute()
return events_result.get('items', [])
def help(self):
return 'Google calendar. Lists 10 next events by default. today = list today\'s events.'
def get_settings(self):
data = super().get_settings()
data['calendar_rooms'] = self.calendar_rooms
return data
def set_settings(self, data):
super().set_settings(data)
if data.get('calendar_rooms'):
self.calendar_rooms = data['calendar_rooms']
def parse_date(self, start):
try:
dt = datetime.strptime(start, '%Y-%m-%dT%H:%M:%S%z')
return dt.strftime("%d.%m %H:%M")
except ValueError:
dt = datetime.strptime(start, '%Y-%m-%d')
return dt.strftime("%d.%m")
