165 lines
6 KiB
Python
165 lines
6 KiB
Python
import json
|
|
from typing import Any, Callable, List, Optional
|
|
|
|
from fastapi import WebSocket
|
|
from loguru import logger
|
|
|
|
from .crud import (
|
|
create_event,
|
|
delete_events,
|
|
get_all_active_relays_ids,
|
|
get_event,
|
|
get_events,
|
|
mark_events_deleted,
|
|
)
|
|
from .models import NostrEvent, NostrEventType, NostrFilter
|
|
|
|
|
|
class NostrClientManager:
|
|
def __init__(self: "NostrClientManager"):
|
|
self.clients: List["NostrClientConnection"] = []
|
|
self.active_relays: Optional[List[str]] = None
|
|
|
|
async def add_client(self, client: "NostrClientConnection") -> bool:
|
|
allow_connect = await self.allow_client_to_connect(client.relay_id, client.websocket)
|
|
if not allow_connect:
|
|
return False
|
|
setattr(client, "broadcast_event", self.broadcast_event)
|
|
self.clients.append(client)
|
|
|
|
return True
|
|
|
|
def remove_client(self, client: "NostrClientConnection"):
|
|
self.clients.remove(client)
|
|
|
|
async def broadcast_event(self, source: "NostrClientConnection", event: NostrEvent):
|
|
for client in self.clients:
|
|
if client != source:
|
|
await client.notify_event(event)
|
|
|
|
async def allow_client_to_connect(self, relay_id:str, websocket: WebSocket) -> bool:
|
|
if not self.active_relays:
|
|
self.active_relays = await get_all_active_relays_ids()
|
|
|
|
if relay_id not in self.active_relays:
|
|
await websocket.close(reason=f"Relay '{relay_id}' is not active")
|
|
return False
|
|
return True
|
|
|
|
async def toggle_relay(self, relay_id: str, active: bool):
|
|
if not self.active_relays:
|
|
self.active_relays = await get_all_active_relays_ids()
|
|
if active:
|
|
self.active_relays.append(relay_id)
|
|
else:
|
|
self.active_relays = [r for r in self.active_relays if r != relay_id]
|
|
await self.stop_clients_for_relay(relay_id)
|
|
|
|
async def stop_clients_for_relay(self, relay_id: str):
|
|
for client in self.clients:
|
|
if client.relay_id == relay_id:
|
|
await client.stop(reason=f"Relay '{relay_id}' has been deactivated.")
|
|
|
|
|
|
class NostrClientConnection:
|
|
broadcast_event: Callable
|
|
|
|
def __init__(self, relay_id: str, websocket: WebSocket):
|
|
self.websocket = websocket
|
|
self.relay_id = relay_id
|
|
self.filters: List[NostrFilter] = []
|
|
|
|
async def start(self):
|
|
await self.websocket.accept()
|
|
while True:
|
|
json_data = await self.websocket.receive_text()
|
|
print("### received: ", json_data)
|
|
try:
|
|
data = json.loads(json_data)
|
|
|
|
resp = await self.__handle_message(data)
|
|
for r in resp:
|
|
await self.websocket.send_text(json.dumps(r))
|
|
except Exception as e:
|
|
logger.warning(e)
|
|
|
|
async def stop(self, reason: Optional[str]):
|
|
try:
|
|
message = reason if reason else "Server closed webocket"
|
|
await self.websocket.send_text(json.dumps(["NOTICE", message]))
|
|
await self.websocket.close()
|
|
except:
|
|
pass
|
|
|
|
async def notify_event(self, event: NostrEvent) -> bool:
|
|
for filter in self.filters:
|
|
if filter.matches(event):
|
|
resp = event.serialize_response(filter.subscription_id)
|
|
await self.websocket.send_text(json.dumps(resp))
|
|
return True
|
|
return False
|
|
|
|
async def __handle_message(self, data: List) -> List:
|
|
if len(data) < 2:
|
|
return []
|
|
|
|
message_type = data[0]
|
|
if message_type == NostrEventType.EVENT:
|
|
await self.__handle_event(NostrEvent.parse_obj(data[1]))
|
|
return []
|
|
if message_type == NostrEventType.REQ:
|
|
if len(data) != 3:
|
|
return []
|
|
return await self.__handle_request(data[1], NostrFilter.parse_obj(data[2]))
|
|
if message_type == NostrEventType.CLOSE:
|
|
self.__handle_close(data[1])
|
|
|
|
return []
|
|
|
|
async def __handle_event(self, e: NostrEvent):
|
|
resp_nip20: List[Any] = ["OK", e.id]
|
|
try:
|
|
e.check_signature()
|
|
if e.is_replaceable_event():
|
|
await delete_events(
|
|
self.relay_id, NostrFilter(kinds=[e.kind], authors=[e.pubkey])
|
|
)
|
|
await create_event(self.relay_id, e)
|
|
await self.broadcast_event(self, e)
|
|
if e.is_delete_event():
|
|
await self.__handle_delete_event(e)
|
|
resp_nip20 += [True, ""]
|
|
except ValueError:
|
|
resp_nip20 += [False, "invalid: wrong event `id` or `sig`"]
|
|
except Exception:
|
|
event = await get_event(self.relay_id, e.id)
|
|
# todo: handle NIP20 in detail
|
|
resp_nip20 += [event != None, f"error: failed to create event"]
|
|
|
|
await self.websocket.send_text(json.dumps(resp_nip20))
|
|
|
|
async def __handle_delete_event(self, event: NostrEvent):
|
|
# NIP 09
|
|
filter = NostrFilter(authors=[event.pubkey])
|
|
filter.ids = [t[1] for t in event.tags if t[0] == "e"]
|
|
events_to_delete = await get_events(self.relay_id, filter, False)
|
|
ids = [e.id for e in events_to_delete if not e.is_delete_event()]
|
|
await mark_events_deleted(self.relay_id, NostrFilter(ids=ids))
|
|
|
|
async def __handle_request(self, subscription_id: str, filter: NostrFilter) -> List:
|
|
filter.subscription_id = subscription_id
|
|
self.remove_filter(subscription_id)
|
|
self.filters.append(filter)
|
|
events = await get_events(self.relay_id, filter)
|
|
serialized_events = [
|
|
event.serialize_response(subscription_id) for event in events
|
|
]
|
|
resp_nip15 = ["EOSE", subscription_id]
|
|
serialized_events.append(resp_nip15)
|
|
return serialized_events
|
|
|
|
def __handle_close(self, subscription_id: str):
|
|
self.remove_filter(subscription_id)
|
|
|
|
def remove_filter(self, subscription_id: str):
|
|
self.filters = [f for f in self.filters if f.subscription_id != subscription_id]
|