130 lines
4.6 KiB
Python
130 lines
4.6 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
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from .autoupdate import AutoupdateFormat
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from .cache import element_cache, split_element_id
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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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def __init__(self, *args: Any, **kwargs: Any) -> None:
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self.projector_hash: Dict[int, int] = {}
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super().__init__(*args, **kwargs)
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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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# self.scope['user'] is the full_data dict of the user. For an
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# anonymous user is it the dict {'id': 0}
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change_id = None
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if not await async_anonymous_is_enabled() and not self.scope["user"]["id"]:
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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"][
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0
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].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(self.scope["user"]["id"], 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"]
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item = event["incomming"]
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users = item.get("users")
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reply_channels = item.get("replyChannels")
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if (
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(isinstance(users, bool) and users)
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or (isinstance(users, list) and user_id in users)
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or (
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isinstance(reply_channels, list) and self.channel_name in reply_channels
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)
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or (users is None and reply_channels is None)
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):
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item["senderChannelName"] = event["senderChannelName"]
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item["senderUserId"] = event["senderUserId"]
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await self.send_json(type="notify", content=item)
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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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self.scope["user"]["id"], change_id, max_change_id=change_id
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)
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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(
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type="autoupdate",
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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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),
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)
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async def projector_changed(self, event: Dict[str, Any]) -> None:
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"""
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The projector has changed.
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"""
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all_projector_data = event["data"]
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projector_data: Dict[int, Dict[str, Any]] = {}
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for projector_id in self.listen_projector_ids:
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data = all_projector_data.get(
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projector_id, {"error": f"No data for projector {projector_id}"}
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)
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new_hash = hash(str(data))
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if new_hash != self.projector_hash[projector_id]:
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projector_data[projector_id] = data
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self.projector_hash[projector_id] = new_hash
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if projector_data:
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await self.send_json(type="projector", content=projector_data)
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