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models.py
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models.py
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import base64
from datetime import date, datetime, timedelta
from dateutil import parser as date_parser
import httplib2
import logging
import pytz
from flask import render_template
from flask_login import UserMixin, make_secure_token
# Google App Engine and API access
from google.appengine.api import mail
from google.appengine.ext import ndb
from apiclient import discovery
from oauth2client.appengine import CredentialsNDBProperty
from google.appengine.api import memcache
# If you are using App Engine, you can connect to the App Engine memcache server easily:
# from werkzeug.contrib.cache import GAEMemcachedCache
# cache = GAEMemcachedCache()
# Helper function to test for event overlaps
def conflict(slot, busy_events):
return any(e['dt_start'] < slot['end'] and e['dt_end'] > slot['start'] for e in busy_events)
# User 1:1 UserPrefs
class UserPrefs(ndb.Model):
title = ndb.StringProperty(required=True, default='Parent-Teacher Conferences')
display_name = ndb.StringProperty()
location = ndb.StringProperty()
timezone = ndb.StringProperty(required=True, default='America/Los_Angeles')
interval = ndb.IntegerProperty(required=True, default=30)
duration = ndb.IntegerProperty(required=True, default=20)
first_day_scheduled = ndb.DateProperty()
last_day_scheduled = ndb.DateProperty()
booking_start_date = ndb.DateProperty()
booking_start_time = ndb.StringProperty()
booking_end_date = ndb.DateProperty()
booking_end_time = ndb.StringProperty()
minimum_notice_hours = ndb.IntegerProperty(required=True, default=36)
weekday_start = ndb.IntegerProperty(required=True, default=1)
# User 1:7 DayPrefs
class DayPrefs(ndb.Model):
position = ndb.IntegerProperty(required=True)
enabled = ndb.BooleanProperty(required=True)
day_start_time = ndb.StringProperty(required=True)
lunch_start_time = ndb.StringProperty(required=True)
lunch_end_time = ndb.StringProperty(required=True)
day_end_time = ndb.StringProperty(required=True)
class User(ndb.Model, UserMixin):
credentials = CredentialsNDBProperty()
auth_type = ndb.StringProperty()
email = ndb.StringProperty()
first_name = ndb.StringProperty()
last_name = ndb.StringProperty()
google_id = ndb.StringProperty()
access_token = ndb.StringProperty()
refresh_token = ndb.StringProperty()
created = ndb.DateTimeProperty(auto_now_add=True)
deleted = ndb.DateTimeProperty()
prefs = ndb.StructuredProperty(UserPrefs)
days = ndb.StructuredProperty(DayPrefs, repeated=True)
@property
def is_active(self):
return self.deleted is None
def booking_is_available(self, dt=None):
if not self.is_active:
return False
if dt is None:
dt = datetime.now()
dt_start = self.prefs.booking_start_time or dt
dt_end = self.prefs.booking_end_time or dt
return dt_start <= dt and dt <= dt_end
def get_id(self):
return self.key.id()
def getTimezoneObject(self):
return pytz.timezone(self.prefs.timezone)
def defaultUserPrefs(self):
display_name = ' '.join([self.first_name, self.last_name])
title = 'Parent-Teacher Conferences with %s' % display_name
prefs = UserPrefs(title=title, display_name=display_name)
return prefs
def defaultDayPrefs(self):
day_prefs = [ ]
# Per Python's weekday() function, Monday is 0, Sunday is 6
for position in range(7):
enabled = position <= 4 # Monday through Friday
day_pref = DayPrefs(position=position, enabled=enabled)
day_pref.day_start_time = '07:00'
day_pref.lunch_start_time = '08:15'
day_pref.lunch_end_time = '12:30'
day_pref.day_end_time = '16:30'
day_prefs.append(day_pref)
return day_prefs
def getBusyEvents(self, dt_from, dt_to, calendar_id='primary'):
http_auth = httplib2.Http(memcache)
self.credentials.authorize(http_auth)
cal_service = discovery.build('calendar', 'v3', http=http_auth)
busy_events = [ ]
page_token = None
# logging.debug('GET BUSY from %s to %s' % (dt_from, dt_to))
while True:
result = cal_service.events().list(
calendarId=calendar_id,
orderBy='startTime',
singleEvents=True,
timeMin=dt_from.isoformat(),
timeMax=dt_to.isoformat(),
timeZone=self.prefs.timezone,
pageToken=page_token).execute()
events = result['items']
# logging.debug('EVENTS: %r' % events)
for e in events:
if e.get('transparency') != 'transparent':
dt_start = date_parser.parse(e['start']['dateTime'])
dt_end = date_parser.parse(e['end']['dateTime'])
e.update({ 'dt_start': dt_start, 'dt_end': dt_end })
busy_events.append(e)
page_token = result.get('nextPageToken')
if not page_token:
break
return busy_events
def getPossibleSlotsForDay(self, d):
slots = [ ]
tz = self.getTimezoneObject()
d_start = self.prefs.first_day_scheduled or d
d_end = self.prefs.last_day_scheduled or d
if d_start <= d and d <= d_end:
i = d.weekday()
day_prefs = self.days[i]
if day_prefs.enabled:
day_start = tz.localize(
date_parser.parse(day_prefs.day_start_time or '04:00').replace(
year=d.year, month=d.month, day=d.day))
day_end = tz.localize(
date_parser.parse(day_prefs.day_end_time or '23:00').replace(
year=d.year, month=d.month, day=d.day))
lunch_start = None
lunch_end = None
if day_prefs.lunch_start_time and day_prefs.lunch_end_time:
lunch_start = tz.localize(
date_parser.parse(day_prefs.lunch_start_time).replace(
year=d.year, month=d.month, day=d.day))
lunch_end = tz.localize(
date_parser.parse(day_prefs.lunch_end_time).replace(
year=d.year, month=d.month, day=d.day))
interval = timedelta(minutes=self.prefs.interval)
t_start = day_start
t_end = t_start + interval
while t_end <= day_end:
if not lunch_start or (t_start >= lunch_end or t_end <= lunch_start):
t_start_time = t_start.time()
slots.append({ 'start': t_start, 'end': t_end, 'available': True })
t_start = t_end
t_end = t_start + interval
return slots
def getPossibleSlots(self, dt_from, dt_to):
all_slots = [ ]
d_from = dt_from.date()
d_to = dt_to.date()
d = d_from
while d <= d_to:
slots = self.getPossibleSlotsForDay(d)
all_slots += slots
d += timedelta(days=1)
return all_slots
def getSlotLimits(self, slots, available_only=True):
latest_day = None
earliest_time = None
latest_time = None
dates = [ ]
times = [ ]
for s in slots:
if not available_only or s['available']:
d = s['start'].date()
t = s['start'].time()
if latest_day is None or d != latest_day:
dates.append(d)
latest_day = d
if not earliest_time or earliest_time > t:
earliest_time = t
if not latest_time or latest_time < t:
latest_time = t
if latest_day and earliest_time and latest_time:
interval = timedelta(minutes=self.prefs.interval)
t = datetime.combine(latest_day, earliest_time)
t_end = datetime.combine(latest_day, latest_time)
while t <= t_end:
times.append(t.time())
t += interval
return { 'dates': dates, 'times': times }
def getAvailableSlots(self, dt_from=None, dt_to=None, calendar_id='primary'):
# Get some kind of date range
d_today = date.today()
day_offset = d_today.weekday()
d_from = d_today - timedelta(days=day_offset)
d_to = d_from + timedelta(days=35)
tz = self.getTimezoneObject()
if dt_from is None:
if self.prefs.first_day_scheduled is not None:
d_from = self.prefs.first_day_scheduled
dt_from = tz.localize(
datetime(d_from.year, d_from.month, d_from.day, 0, 0, 0, 0))
if dt_to is None:
if self.prefs.last_day_scheduled is not None:
d_to = self.prefs.last_day_scheduled
dt_to = tz.localize(
datetime(d_to.year, d_to.month, d_to.day, 0, 0, 0, 0))
slots = self.getPossibleSlots(dt_from, dt_to)
busy_events = self.getBusyEvents(dt_from, dt_to, calendar_id)
for s in slots:
s['available'] = not conflict(s, busy_events)
return slots
@classmethod
def getById(cls, user_id):
try:
key = ndb.Key('User', user_id)
return key.get()
except:
return None
@classmethod
def getByUrlsafeId(cls, uid):
try:
key = ndb.Key(urlsafe=uid)
return key.get()
except:
return None
@classmethod
def getAvailableResources(cls):
users = [ ]
qry = User.query(User.auth_type == 'gafe').order(User.last_name)
for user in qry.fetch(100):
if user.booking_is_available():
users.append(user)
return users
@classmethod
def findUserOrCreateKey(cls, auth_type, email):
qry = User.query(User.auth_type == auth_type, User.email == email)
user = qry.get()
if user is not None:
return (user, False)
prefix, domain = email.split('@')
timestr = datetime.utcnow().isoformat()
token = make_secure_token(email, timestr)[8:32]
new_id = '@'.join([prefix, token])
return (ndb.Key('User', new_id), True)
@classmethod
def fromCredentials(cls, credentials):
http_auth = httplib2.Http(memcache)
credentials.authorize(http_auth)
plus_service = discovery.build('plus', 'v1', http=http_auth)
profile = plus_service.people().get(userId='me').execute()
email = profile['emails'][0]['value'].lower()
user = None
user_or_key, create = cls.findUserOrCreateKey('gafe', email)
if create:
user = User(key=user_or_key, credentials=credentials)
user.auth_type = 'gafe'
user.email = email
user.first_name = profile['name']['givenName']
user.last_name = profile['name']['familyName']
user.google_id = profile['id']
user.access_token = credentials.access_token
user.refresh_token = credentials.refresh_token
user.prefs = user.defaultUserPrefs()
user.days = user.defaultDayPrefs()
user.put()
else:
user = user_or_key
user.credentials = credentials
user.put()
return (user, create)
class Event(ndb.Model):
location = ndb.StringProperty()
calendar_id = ndb.StringProperty()
event_id = ndb.StringProperty()
url = ndb.StringProperty()
class Attendee(ndb.Model):
email = ndb.StringProperty()
phone = ndb.StringProperty()
first_name = ndb.StringProperty()
last_name = ndb.StringProperty()
notes = ndb.StringProperty() # 1500 char limit
class Booking(ndb.Model):
resource = ndb.KeyProperty(kind=User)
title = ndb.StringProperty()
organizer_name = ndb.StringProperty()
attendee = ndb.StructuredProperty(Attendee)
event = ndb.StructuredProperty(Event)
start_time = ndb.DateTimeProperty()
end_time = ndb.DateTimeProperty()
timezone = ndb.StringProperty()
created = ndb.DateTimeProperty(auto_now_add=True)
updated = ndb.DateTimeProperty(auto_now=True)
reminded = ndb.DateTimeProperty()
canceled = ndb.DateTimeProperty()
def sendReminder(self, credentials):
pass
def createCalendarEvent(self, resource):
description = render_template('event-description.txt', resource=resource, booking=self)
location = resource.prefs.location
tz = pytz.timezone(self.timezone)
start_time = pytz.utc.localize(self.start_time).astimezone(tz).isoformat()
end_time = pytz.utc.localize(self.end_time).astimezone(tz).isoformat()
event_id = None
# event_id = base64.b32encode(self.key.urlsafe()).rstrip('=').lower()
# logging.debug('CREATE EVENT id %r' % event_id)
# logging.debug('CREATE EVENT start %s' % start_time)
# logging.debug('CREATE EVENT end %s' % end_time)
# logging.debug('CREATE EVENT timezone %s' % self.timezone)
event = {
'id': event_id,
'summary': self.title,
'location': location,
'description': description,
'start': {
'dateTime': start_time,
'timeZone': self.timezone,
},
'end': {
'dateTime': end_time,
'timeZone': self.timezone,
},
'attendees': [
{
'email': resource.email,
'organizer': True
},
{
'email': self.attendee.email
}
],
'reminders': {
'useDefault': False,
'overrides': [
{
'method': 'email',
'minutes': 1440
},
{
'method': 'popup',
'minutes': 30
}
]
}
}
# make calendar entry
http_auth = httplib2.Http(memcache)
resource.credentials.authorize(http_auth)
cal_service = discovery.build('calendar', 'v3', http=http_auth)
calendar = cal_service.calendars().get(calendarId='primary').execute()
new_event = cal_service.events().insert(
calendarId='primary', sendNotifications=True, body=event).execute()
self.event = Event()
self.event.location = location
self.event.calendar_id = calendar['id']
self.event.event_id = new_event['id']
self.event.url = new_event['htmlLink']
self.put()
@classmethod
def createFromPost(cls, resource, data):
attendee = Attendee()
attendee.email = data['email']
attendee.phone = data['phone']
attendee.first_name = data['first_name']
attendee.last_name = data['last_name']
attendee.notes = data['notes']
booking = Booking(resource=resource.key, attendee=attendee)
booking.title = resource.prefs.title
booking.organizer_name = resource.prefs.display_name
start_time_utc = date_parser.parse(data['start_time']).astimezone(pytz.utc).replace(tzinfo=None)
end_time_utc = date_parser.parse(data['end_time']).astimezone(pytz.utc).replace(tzinfo=None)
# logging.debug('CREATE BOOKING start %s' % start_time_utc)
# logging.debug('CREATE BOOKING end %s' % end_time_utc)
# logging.debug('CREATE BOOKING timezone %s' % data['timezone'])
booking.start_time = start_time_utc
booking.end_time = end_time_utc
booking.timezone = data['timezone']
booking.put()
try:
booking.createCalendarEvent(resource)
# booking.sendReminder(credentials)
except:
booking.key.delete()
booking = None
raise
return booking
@classmethod
def getBookingsForResource(cls, resource):
qry = Booking.query(Booking.resource == resource.key).order(Booking.start_time)
return qry.fetch()
@classmethod
def getBookingsForAttendeeEmail(cls, email):
qry = Booking.query(Booking.attendee.email == email).order(Booking.start_time)
return qry.fetch()
class RemindersToken(ndb.Model):
email = ndb.StringProperty()
created = ndb.DateTimeProperty(auto_now_add=True)
expires = ndb.DateTimeProperty()
@classmethod
def validateToken(cls, token):
email = None
try:
key = ndb.Key(urlsafe=token)
reminders_token = key.get()
email = reminders_token.email
dt_now_utc = datetime.utcnow()
if reminders_token.expires <= dt_now_utc:
key.delete()
email = None
except:
pass
return email
@classmethod
def invalidateTokensForEmail(cls, email):
dt_now_utc = datetime.utcnow()
qry = RemindersToken.query(ndb.OR(RemindersToken.expires <= dt_now_utc,
RemindersToken.email == email))
for token in qry.fetch():
token.key.delete()
@classmethod
def createAndSendToken(cls, email, reminders_url, app_config):
email = email.lower()
cls.invalidateTokensForEmail(email)
dt_now_utc = datetime.utcnow()
reminders_token = RemindersToken()
reminders_token.email = email
reminders_token.created = dt_now_utc
reminders_token.expires = dt_now_utc + timedelta(days=app_config['REMINDERS_EXPIRE'])
reminders_token.put()
body = render_template('reminder-message.txt',
reminders_url=reminders_url, config=app_config,
email=email, token=reminders_token.key.urlsafe())
logging.debug('SEND MESSAGE to %s' % email)
loggind.debug(body)
message = mail.EmailMessage(
sender=app_config['SUPPORT_EMAIL'],
subject='Conference reminders link',
to=email,
body=body)
message.send()