107 lines
3.6 KiB
Python
107 lines
3.6 KiB
Python
import asyncio
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import json
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from typing import Any, Callable, List, Union
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from fastapi import WebSocket
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from loguru import logger
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from .crud import create_event, get_events
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from .models import NostrEvent, NostrEventType, NostrFilter
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class NostrClientManager:
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def __init__(self):
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self.clients: List["NostrClientConnection"] = []
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def add_client(self, client: "NostrClientConnection"):
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setattr(client, "broadcast_event", self.broadcast_event)
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self.clients.append(client)
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def remove_client(self, client: "NostrClientConnection"):
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self.clients.remove(client)
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async def broadcast_event(self, source: "NostrClientConnection", event: NostrEvent):
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for client in self.clients:
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if client != source:
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sent = await client.notify_event(event)
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print("### sent", sent, event.id)
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class NostrClientConnection:
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broadcast_event: Callable
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def __init__(self, websocket: WebSocket):
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self.websocket = websocket
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self.filters: List[NostrFilter] = []
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async def start(self):
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await self.websocket.accept()
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while True:
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json_data = await self.websocket.receive_text()
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try:
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data = json.loads(json_data)
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resp = await self.__handle_message(data)
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if resp:
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for r in resp:
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await self.websocket.send_text(json.dumps(r))
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except Exception as e:
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logger.warning(e)
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async def notify_event(self, event: NostrEvent) -> bool:
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for filter in self.filters:
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if filter.matches(event):
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resp = event.serialize_response(filter.subscription_id)
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for i in range(0, 100):
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await self.websocket.send_text(json.dumps(resp))
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await asyncio.sleep(1)
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return True
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return False
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async def __handle_message(self, data: List) -> Union[None, List]:
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if len(data) < 2:
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return None
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message_type = data[0]
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if message_type == NostrEventType.EVENT:
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await self.__handle_event(NostrEvent.parse_obj(data[1]))
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return None
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if message_type == NostrEventType.REQ:
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if len(data) != 3:
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return None
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return await self.__handle_request(data[1], NostrFilter.parse_obj(data[2]))
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if message_type == NostrEventType.CLOSE:
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self.__handle_close(data[1])
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return None
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async def __handle_event(self, e: "NostrEvent"):
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resp_nip20: List[Any] = ["ok", e.id]
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try:
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e.check_signature()
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await create_event("111", e)
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await self.broadcast_event(self, e)
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resp_nip20 += [True, ""]
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except Exception as ex:
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resp_nip20 += [False, f"error: {ex}"]
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await self.websocket.send_text(json.dumps(resp_nip20))
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async def __handle_request(self, subscription_id: str, filter: NostrFilter) -> List:
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filter.subscription_id = subscription_id
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self.remove_filter(subscription_id)
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self.filters.append(filter)
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events = await get_events("111", filter)
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serialized_events = [
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event.serialize_response(subscription_id) for event in events
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]
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resp_nip15 = ["EOSE", subscription_id]
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serialized_events.append(resp_nip15)
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return serialized_events
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def __handle_close(self, subscription_id: str):
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self.remove_filter(subscription_id)
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def remove_filter(self, subscription_id: str):
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self.filters = [f for f in self.filters if f.subscription_id != subscription_id]
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