create message pool class

nostr/message_pool.py

@@ -0,0 +1,66 @@
+import json
+from queue import Queue
+from threading import Lock
+from .message_type import RelayMessageType
+from .event import Event
+
+class EventMessage:
+    def __init__(self, event: Event, url: str) -> None:
+        self.event = event
+        self.url = url
+
+class NoticeMessage:
+    def __init__(self, content: str, url: str) -> None:
+        self.content = content
+        self.url = url
+
+class EndOfStoredEventsMessage:
+    def __init__(self, subscription_id: str, url: str) -> None:
+        self.subscription_id = subscription_id
+        self.url = url
+
+class MessagePool:
+    def __init__(self) -> None:
+        self.events: Queue[EventMessage] = Queue()
+        self.notices: Queue[NoticeMessage] = Queue()
+        self.eose_notices: Queue[EndOfStoredEventsMessage] = Queue()
+        self._unique_events: set = set()
+        self.lock: Lock = Lock()
+    
+    def add_message(self, message: str, url: str):
+        self._process_message(message, url)
+
+    def get_event(self):
+        return self.events.get()
+
+    def get_notice(self):
+        return self.notices.get()
+
+    def get_eose_notice(self):
+        return self.eose_notices.get()
+
+    def has_events(self):
+        return self.events.qsize() > 0
+
+    def has_notices(self):
+        return self.notices.qsize() > 0
+
+    def has_eose_notices(self):
+        return self.eose_notices.qsize() > 0
+
+    def _process_message(self, message: str, url: str):
+        message_json = json.loads(message)
+        message_type = message_json[0]
+        if message_type == RelayMessageType.EVENT:
+            e = message_json[2]
+            event = Event(e['pubkey'], e['content'], e['created_at'], e['kind'], e['tags'], e['id'], e['sig'])
+            with self.lock:
+                if not event.id in self._unique_events:
+                    self.events.put(EventMessage(event, url))
+                    self._unique_events.add(event.id)
+        elif message_type == RelayMessageType.NOTICE:
+            self.notices.put(NoticeMessage(message_json[1], url))
+        elif message_type == RelayMessageType.END_OF_STORED_EVENTS:
+            self.eose_notices.put(EndOfStoredEventsMessage(message_json[1], url))
+
+