104 lines
3.8 KiB
Python
104 lines
3.8 KiB
Python
from collections import defaultdict
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from typing import Any, Dict, List
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from urllib.parse import parse_qs
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from .auth import async_anonymous_is_enabled, user_to_collection_user
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from .cache import element_cache, split_element_id
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from .collection import AutoupdateFormat
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from .websocket import ProtocollAsyncJsonWebsocketConsumer, get_element_data
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class SiteConsumer(ProtocollAsyncJsonWebsocketConsumer):
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"""
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Websocket Consumer for the site.
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"""
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groups = ['site']
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async def connect(self) -> None:
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"""
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A user connects to the site.
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If it is an anonymous user and anonymous is disabled, the connection is closed.
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Sends the startup data to the user.
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"""
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# If the user is the anonymous user, change the value to None
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if self.scope['user'].id is None:
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self.scope['user'] = None
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change_id = None
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if not await async_anonymous_is_enabled() and self.scope['user'] is None:
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await self.close()
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return
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query_string = parse_qs(self.scope['query_string'])
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if b'change_id' in query_string:
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try:
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change_id = int(query_string[b'change_id'][0])
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except ValueError:
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await self.close() # TODO: Find a way to send an error code
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return
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if b'autoupdate' in query_string and query_string[b'autoupdate'][0].lower() not in [b'0', b'off', b'false']:
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# a positive value in autoupdate. Start autoupdate
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await self.channel_layer.group_add('autoupdate', self.channel_name)
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await self.accept()
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if change_id is not None:
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try:
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data = await get_element_data(user_to_collection_user(self.scope['user']), change_id)
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except ValueError:
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# When the change_id is to big, do nothing
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pass
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else:
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await self.send_json(type='autoupdate', content=data)
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async def disconnect(self, close_code: int) -> None:
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"""
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A user disconnects. Remove it from autoupdate.
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"""
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await self.channel_layer.group_discard('autoupdate', self.channel_name)
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async def send_notify(self, event: Dict[str, Any]) -> None:
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"""
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Send a notify message to the user.
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"""
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user_id = self.scope['user'].id if self.scope['user'] else 0
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out = []
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for item in event['incomming']:
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users = item.get('users')
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reply_channels = item.get('replyChannels')
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if ((isinstance(users, list) and user_id in users)
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or (isinstance(reply_channels, list) and self.channel_name in reply_channels)
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or users is None and reply_channels is None):
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item['senderReplyChannelName'] = event.get('senderReplyChannelName')
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item['senderUserId'] = event.get('senderUserId')
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out.append(item)
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if out:
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await self.send_json(type='notify', content=out)
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async def send_data(self, event: Dict[str, Any]) -> None:
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"""
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Send changed or deleted elements to the user.
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"""
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change_id = event['change_id']
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changed_elements, deleted_elements_ids = await element_cache.get_restricted_data(
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user_to_collection_user(self.scope['user']),
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change_id,
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max_change_id=change_id)
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deleted_elements: Dict[str, List[int]] = defaultdict(list)
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for element_id in deleted_elements_ids:
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collection_string, id = split_element_id(element_id)
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deleted_elements[collection_string].append(id)
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await self.send_json(type='autoupdate', content=AutoupdateFormat(
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changed=changed_elements,
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deleted=deleted_elements,
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from_change_id=change_id,
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to_change_id=change_id,
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all_data=False))
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