epicyon/happening.py

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__filename__ = "happening.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
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__version__ = "1.2.0"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@libreserver.org"
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__status__ = "Production"
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__module_group__ = "Core"
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import os
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from uuid import UUID
from datetime import datetime
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from datetime import timedelta
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from utils import is_public_post
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from utils import load_json
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from utils import save_json
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from utils import locate_post
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from utils import has_object_dict
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from utils import acct_dir
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def _valid_uuid(testUuid: str, version: int):
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"""Check if uuid_to_test is a valid UUID
"""
try:
uuid_obj = UUID(testUuid, version=version)
except ValueError:
return False
return str(uuid_obj) == testUuid
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def _remove_event_from_timeline(eventId: str, tlEventsFilename: str) -> None:
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"""Removes the given event Id from the timeline
"""
if eventId + '\n' not in open(tlEventsFilename).read():
return
with open(tlEventsFilename, 'r') as fp:
eventsTimeline = fp.read().replace(eventId + '\n', '')
try:
with open(tlEventsFilename, 'w+') as fp2:
fp2.write(eventsTimeline)
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except OSError:
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print('EX: ERROR: unable to save events timeline')
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def save_event_post(base_dir: str, handle: str, post_id: str,
eventJson: {}) -> bool:
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"""Saves an event to the calendar and/or the events timeline
If an event has extra fields, as per Mobilizon,
Then it is saved as a separate entity and added to the
events timeline
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See https://framagit.org/framasoft/mobilizon/-/blob/
master/lib/federation/activity_stream/converter/event.ex
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"""
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if not os.path.isdir(base_dir + '/accounts/' + handle):
print('WARN: Account does not exist at ' +
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base_dir + '/accounts/' + handle)
calendarPath = base_dir + '/accounts/' + handle + '/calendar'
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if not os.path.isdir(calendarPath):
os.mkdir(calendarPath)
# get the year, month and day from the event
eventTime = datetime.strptime(eventJson['startTime'],
"%Y-%m-%dT%H:%M:%S%z")
eventYear = int(eventTime.strftime("%Y"))
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if eventYear < 2020 or eventYear >= 2100:
return False
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eventMonthNumber = int(eventTime.strftime("%m"))
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if eventMonthNumber < 1 or eventMonthNumber > 12:
return False
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eventDayOfMonth = int(eventTime.strftime("%d"))
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if eventDayOfMonth < 1 or eventDayOfMonth > 31:
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return False
if eventJson.get('name') and eventJson.get('actor') and \
eventJson.get('uuid') and eventJson.get('content'):
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if not _valid_uuid(eventJson['uuid'], 4):
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return False
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print('Mobilizon type event')
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# if this is a full description of an event then save it
# as a separate json file
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eventsPath = base_dir + '/accounts/' + handle + '/events'
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if not os.path.isdir(eventsPath):
os.mkdir(eventsPath)
eventsYearPath = \
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base_dir + '/accounts/' + handle + '/events/' + str(eventYear)
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if not os.path.isdir(eventsYearPath):
os.mkdir(eventsYearPath)
eventId = str(eventYear) + '-' + eventTime.strftime("%m") + '-' + \
eventTime.strftime("%d") + '_' + eventJson['uuid']
eventFilename = eventsYearPath + '/' + eventId + '.json'
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save_json(eventJson, eventFilename)
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# save to the events timeline
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tlEventsFilename = base_dir + '/accounts/' + handle + '/events.txt'
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if os.path.isfile(tlEventsFilename):
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_remove_event_from_timeline(eventId, tlEventsFilename)
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try:
with open(tlEventsFilename, 'r+') as tlEventsFile:
content = tlEventsFile.read()
if eventId + '\n' not in content:
tlEventsFile.seek(0, 0)
tlEventsFile.write(eventId + '\n' + content)
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except OSError as ex:
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print('EX: Failed to write entry to events file ' +
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tlEventsFilename + ' ' + str(ex))
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return False
else:
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try:
with open(tlEventsFilename, 'w+') as tlEventsFile:
tlEventsFile.write(eventId + '\n')
except OSError:
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print('EX: unable to write ' + tlEventsFilename)
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# create a directory for the calendar year
if not os.path.isdir(calendarPath + '/' + str(eventYear)):
os.mkdir(calendarPath + '/' + str(eventYear))
# calendar month file containing event post Ids
calendarFilename = calendarPath + '/' + str(eventYear) + \
'/' + str(eventMonthNumber) + '.txt'
# Does this event post already exist within the calendar month?
if os.path.isfile(calendarFilename):
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if post_id in open(calendarFilename).read():
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# Event post already exists
return False
# append the post Id to the file for the calendar month
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try:
with open(calendarFilename, 'a+') as calendarFile:
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calendarFile.write(post_id + '\n')
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except OSError:
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print('EX: unable to append ' + calendarFilename)
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# create a file which will trigger a notification that
# a new event has been added
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calNotifyFilename = base_dir + '/accounts/' + handle + '/.newCalendar'
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notifyStr = \
'/calendar?year=' + str(eventYear) + '?month=' + \
str(eventMonthNumber) + '?day=' + str(eventDayOfMonth)
try:
with open(calNotifyFilename, 'w+') as calendarNotificationFile:
calendarNotificationFile.write(notifyStr)
except OSError:
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print('EX: unable to write ' + calNotifyFilename)
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return False
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return True
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def _is_happening_event(tag: {}) -> bool:
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"""Is this tag an Event or Place ActivityStreams type?
"""
if not tag.get('type'):
return False
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if tag['type'] != 'Event' and tag['type'] != 'Place':
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return False
return True
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def _is_happening_post(post_json_object: {}) -> bool:
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"""Is this a post with tags?
"""
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if not post_json_object:
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return False
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if not has_object_dict(post_json_object):
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return False
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if not post_json_object['object'].get('tag'):
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return False
return True
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def get_todays_events(base_dir: str, nickname: str, domain: str,
currYear: int, currMonthNumber: int,
currDayOfMonth: int) -> {}:
"""Retrieves calendar events for today
Returns a dictionary of lists containing Event and Place activities
"""
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now = datetime.now()
if not currYear:
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year = now.year
else:
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year = currYear
if not currMonthNumber:
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monthNumber = now.month
else:
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monthNumber = currMonthNumber
if not currDayOfMonth:
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dayNumber = now.day
else:
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dayNumber = currDayOfMonth
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calendarFilename = \
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acct_dir(base_dir, nickname, domain) + \
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'/calendar/' + str(year) + '/' + str(monthNumber) + '.txt'
events = {}
if not os.path.isfile(calendarFilename):
return events
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calendarPostIds = []
recreateEventsFile = False
with open(calendarFilename, 'r') as eventsFile:
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for post_id in eventsFile:
post_id = post_id.replace('\n', '').replace('\r', '')
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post_filename = locate_post(base_dir, nickname, domain, post_id)
if not post_filename:
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recreateEventsFile = True
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continue
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post_json_object = load_json(post_filename)
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if not _is_happening_post(post_json_object):
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continue
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publicEvent = is_public_post(post_json_object)
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postEvent = []
dayOfMonth = None
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for tag in post_json_object['object']['tag']:
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if not _is_happening_event(tag):
continue
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# this tag is an event or a place
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if tag['type'] == 'Event':
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# tag is an event
if not tag.get('startTime'):
continue
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eventTime = \
datetime.strptime(tag['startTime'],
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"%Y-%m-%dT%H:%M:%S%z")
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if int(eventTime.strftime("%Y")) == year and \
int(eventTime.strftime("%m")) == monthNumber and \
int(eventTime.strftime("%d")) == dayNumber:
dayOfMonth = str(int(eventTime.strftime("%d")))
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if '#statuses#' in post_id:
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# link to the id so that the event can be
# easily deleted
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tag['post_id'] = post_id.split('#statuses#')[1]
tag['sender'] = post_id.split('#statuses#')[0]
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tag['sender'] = tag['sender'].replace('#', '/')
tag['public'] = publicEvent
postEvent.append(tag)
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else:
# tag is a place
postEvent.append(tag)
if postEvent and dayOfMonth:
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calendarPostIds.append(post_id)
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if not events.get(dayOfMonth):
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events[dayOfMonth] = []
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events[dayOfMonth].append(postEvent)
# if some posts have been deleted then regenerate the calendar file
if recreateEventsFile:
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try:
with open(calendarFilename, 'w+') as calendarFile:
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for post_id in calendarPostIds:
calendarFile.write(post_id + '\n')
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except OSError:
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print('EX: unable to write ' + calendarFilename)
return events
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def day_events_check(base_dir: str, nickname: str, domain: str,
currDate) -> bool:
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"""Are there calendar events for the given date?
"""
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year = currDate.year
monthNumber = currDate.month
dayNumber = currDate.day
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calendarFilename = \
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acct_dir(base_dir, nickname, domain) + \
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'/calendar/' + str(year) + '/' + str(monthNumber) + '.txt'
if not os.path.isfile(calendarFilename):
return False
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eventsExist = False
with open(calendarFilename, 'r') as eventsFile:
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for post_id in eventsFile:
post_id = post_id.replace('\n', '').replace('\r', '')
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post_filename = locate_post(base_dir, nickname, domain, post_id)
if not post_filename:
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continue
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post_json_object = load_json(post_filename)
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if not _is_happening_post(post_json_object):
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continue
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for tag in post_json_object['object']['tag']:
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if not _is_happening_event(tag):
continue
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# this tag is an event or a place
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if tag['type'] != 'Event':
continue
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# tag is an event
if not tag.get('startTime'):
continue
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eventTime = \
datetime.strptime(tag['startTime'],
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"%Y-%m-%dT%H:%M:%S%z")
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if int(eventTime.strftime("%d")) != dayNumber:
continue
if int(eventTime.strftime("%m")) != monthNumber:
continue
if int(eventTime.strftime("%Y")) != year:
continue
eventsExist = True
break
return eventsExist
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def get_this_weeks_events(base_dir: str, nickname: str, domain: str) -> {}:
"""Retrieves calendar events for this week
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Returns a dictionary indexed by day number of lists containing
Event and Place activities
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Note: currently not used but could be with a weekly calendar screen
"""
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now = datetime.now()
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endOfWeek = now + timedelta(7)
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year = now.year
monthNumber = now.month
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calendarFilename = \
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acct_dir(base_dir, nickname, domain) + \
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'/calendar/' + str(year) + '/' + str(monthNumber) + '.txt'
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events = {}
if not os.path.isfile(calendarFilename):
return events
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calendarPostIds = []
recreateEventsFile = False
with open(calendarFilename, 'r') as eventsFile:
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for post_id in eventsFile:
post_id = post_id.replace('\n', '').replace('\r', '')
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post_filename = locate_post(base_dir, nickname, domain, post_id)
if not post_filename:
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recreateEventsFile = True
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continue
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post_json_object = load_json(post_filename)
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if not _is_happening_post(post_json_object):
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continue
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postEvent = []
weekDayIndex = None
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for tag in post_json_object['object']['tag']:
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if not _is_happening_event(tag):
continue
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# this tag is an event or a place
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if tag['type'] == 'Event':
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# tag is an event
if not tag.get('startTime'):
continue
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eventTime = \
datetime.strptime(tag['startTime'],
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"%Y-%m-%dT%H:%M:%S%z")
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if eventTime >= now and eventTime <= endOfWeek:
weekDayIndex = (eventTime - now).days()
postEvent.append(tag)
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else:
# tag is a place
postEvent.append(tag)
if postEvent and weekDayIndex:
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calendarPostIds.append(post_id)
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if not events.get(weekDayIndex):
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events[weekDayIndex] = []
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events[weekDayIndex].append(postEvent)
# if some posts have been deleted then regenerate the calendar file
if recreateEventsFile:
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try:
with open(calendarFilename, 'w+') as calendarFile:
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for post_id in calendarPostIds:
calendarFile.write(post_id + '\n')
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except OSError:
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print('EX: unable to write ' + calendarFilename)
return events
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def get_calendar_events(base_dir: str, nickname: str, domain: str,
year: int, monthNumber: int) -> {}:
"""Retrieves calendar events
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Returns a dictionary indexed by day number of lists containing
Event and Place activities
"""
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calendarFilename = \
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acct_dir(base_dir, nickname, domain) + \
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'/calendar/' + str(year) + '/' + str(monthNumber) + '.txt'
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events = {}
if not os.path.isfile(calendarFilename):
return events
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calendarPostIds = []
recreateEventsFile = False
with open(calendarFilename, 'r') as eventsFile:
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for post_id in eventsFile:
post_id = post_id.replace('\n', '').replace('\r', '')
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post_filename = locate_post(base_dir, nickname, domain, post_id)
if not post_filename:
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recreateEventsFile = True
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continue
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post_json_object = load_json(post_filename)
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if not _is_happening_post(post_json_object):
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continue
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postEvent = []
dayOfMonth = None
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for tag in post_json_object['object']['tag']:
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if not _is_happening_event(tag):
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continue
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# this tag is an event or a place
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if tag['type'] == 'Event':
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# tag is an event
if not tag.get('startTime'):
continue
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eventTime = \
datetime.strptime(tag['startTime'],
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"%Y-%m-%dT%H:%M:%S%z")
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if int(eventTime.strftime("%Y")) == year and \
int(eventTime.strftime("%m")) == monthNumber:
dayOfMonth = str(int(eventTime.strftime("%d")))
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postEvent.append(tag)
else:
# tag is a place
postEvent.append(tag)
if postEvent and dayOfMonth:
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calendarPostIds.append(post_id)
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if not events.get(dayOfMonth):
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events[dayOfMonth] = []
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events[dayOfMonth].append(postEvent)
# if some posts have been deleted then regenerate the calendar file
if recreateEventsFile:
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try:
with open(calendarFilename, 'w+') as calendarFile:
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for post_id in calendarPostIds:
calendarFile.write(post_id + '\n')
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except OSError:
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print('EX: unable to write ' + calendarFilename)
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return events
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def remove_calendar_event(base_dir: str, nickname: str, domain: str,
year: int, monthNumber: int, messageId: str) -> None:
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"""Removes a calendar event
"""
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calendarFilename = \
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acct_dir(base_dir, nickname, domain) + \
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'/calendar/' + str(year) + '/' + str(monthNumber) + '.txt'
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if not os.path.isfile(calendarFilename):
return
if '/' in messageId:
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messageId = messageId.replace('/', '#')
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if messageId not in open(calendarFilename).read():
return
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lines = None
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with open(calendarFilename, 'r') as f:
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lines = f.readlines()
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if not lines:
return
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try:
with open(calendarFilename, 'w+') as f:
for line in lines:
if messageId not in line:
f.write(line)
except OSError:
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print('EX: unable to write ' + calendarFilename)