crafty-4/app/classes/web/websocket_helper.py

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import json
import logging
from app.classes.shared.console import console
logger = logging.getLogger(__name__)
class WebSocketHelper:
def __init__(self):
self.clients = set()
def add_client(self, client):
self.clients.add(client)
def remove_client(self, client):
self.clients.remove(client)
# pylint: disable=no-self-use
def send_message(self, client, event_type: str, data):
if client.check_auth():
message = str(json.dumps({'event': event_type, 'data': data}))
client.write_message_helper(message)
def broadcast(self, event_type: str, data):
logger.debug(f"Sending to {len(self.clients)} clients: {json.dumps({'event': event_type, 'data': data})}")
for client in self.clients:
try:
self.send_message(client, event_type, data)
except Exception as e:
logger.exception(f'Error caught while sending WebSocket message to {client.get_remote_ip()} {e}')
def broadcast_page(self, page: str, event_type: str, data):
def filter_fn(client):
return client.page == page
self.broadcast_with_fn(filter_fn, event_type, data)
def broadcast_user(self, user_id: str, event_type: str, data):
def filter_fn(client):
return client.get_user_id() == user_id
self.broadcast_with_fn(filter_fn, event_type, data)
def broadcast_user_page(self, page: str, user_id: str, event_type: str, data):
def filter_fn(client):
if client.get_user_id() != user_id:
return False
if client.page != page:
return False
return True
self.broadcast_with_fn(filter_fn, event_type, data)
def broadcast_user_page_params(self, page: str, params: dict, user_id: str, event_type: str, data):
def filter_fn(client):
if client.get_user_id() != user_id:
return False
if client.page != page:
return False
for key, param in params.items():
if param != client.page_query_params.get(key, None):
return False
return True
self.broadcast_with_fn(filter_fn, event_type, data)
def broadcast_page_params(self, page: str, params: dict, event_type: str, data):
def filter_fn(client):
if client.page != page:
return False
for key, param in params.items():
if param != client.page_query_params.get(key, None):
return False
return True
self.broadcast_with_fn(filter_fn, event_type, data)
def broadcast_with_fn(self, filter_fn, event_type: str, data):
clients = list(filter(filter_fn, self.clients))
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logger.debug(f"Sending to {len(clients)} out of {len(self.clients)} clients: {json.dumps({'event': event_type, 'data': data})}")
for client in clients:
try:
self.send_message(client, event_type, data)
except Exception as e:
logger.exception(f'Error catched while sending WebSocket message to {client.get_remote_ip()} {e}')
def disconnect_all(self):
console.info('Disconnecting WebSocket clients')
for client in self.clients:
client.close()
console.info('Disconnected WebSocket clients')
websocket_helper = WebSocketHelper()