'j(UdZddlZddlmZgZeej ed<dej fdZdej ddfdZ d e e efddfd Z y) z Simple in-process pub/sub for Server-Sent Events (SSE). Each SSE client calls subscribe() to get a Queue, then polls it. publish() fans out events to all active queues. Slow/full queues are silently dropped to avoid blocking the publisher. N)Any _subscribersreturnc\tjd}tj||S)z?Register a new SSE client. Returns a queue to read events from.)maxsize)asyncioQueuerappendqs 2/var/www/html/zammad-automation/app/broadcaster.py subscribers#}}R0A Hr cN tj|y#t$rYywxYw)z-Remove a client queue (called on disconnect).N)rremove ValueErrorr s r unsubscribers' A    s  $$eventcg}tD]} |j||D] }t |y#tj$r|j |YPwxYw)zrBroadcast an event to all connected SSE clients. Clients whose queue is full are removed (assumed stale/slow).N)r put_nowaitr QueueFullr r)rdeadr s rpublishrsc D   LL  A    KKN s3$AA) __doc__r typingrrlistr __annotations__rrdictstrrrrr"sg$& d7==!& 7==  7== T  4S> d r