63 行
1.7 KiB
Python
63 行
1.7 KiB
Python
import time
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from datetime import datetime
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from quart import escape
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from anonstream.user import users_for_websocket
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from anonstream.helpers.chat import generate_nonce_hash
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class Rejected(Exception):
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pass
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async def broadcast(websockets, payload):
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for queue in websockets:
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await queue.put(payload)
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async def add_chat_message(chat, users, websockets, user, nonce, comment):
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# check message
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nonce_hash = generate_nonce_hash(nonce)
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if nonce_hash in chat['nonce_hashes']:
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raise Rejected('Discarded suspected duplicate message')
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if len(comment) == 0:
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raise Rejected('Message was empty')
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# add message
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timestamp_ms = time.time_ns() // 1_000_000
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timestamp = timestamp_ms // 1000
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try:
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last_message = next(reversed(chat['messages'].values()))
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except StopIteration:
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message_id = timestamp_ms
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else:
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if timestamp <= last_message['id']:
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message_id = last_message['id'] + 1
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dt = datetime.utcfromtimestamp(timestamp)
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markup = escape(comment)
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chat['messages'][message_id] = {
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'id': message_id,
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'nonce_hash': nonce_hash,
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'token': user['token'],
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'timestamp': timestamp,
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'date': dt.strftime('%Y-%m-%d'),
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'time_minutes': dt.strftime('%H:%M'),
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'time_seconds': dt.strftime('%H:%M:%S'),
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'nomarkup': comment,
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'markup': markup,
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}
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# collect nonce hash
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chat['nonce_hashes'].add(nonce_hash)
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# broadcast message to websockets
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await broadcast(
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websockets,
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payload={
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'type': 'chat',
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'id': message_id,
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'token_hash': user['token_hash'],
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'markup': markup,
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}
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)
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return markup
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