149 lines
6.0 KiB
Python
149 lines
6.0 KiB
Python
import asyncio
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import json
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import logging
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from typing import Any, Dict, List, Optional, Union
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from models.chat import ChatPayload
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from resolvers.chats import create_chat
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from services.auth import login_required
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from services.core import CacheStorage
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from services.rediscache import redis
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from services.schema import query
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logger = logging.getLogger('[resolvers.load] ')
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logger.setLevel(logging.DEBUG)
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async def get_unread_counter(chat_id: str, member_id: int) -> int:
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unread = await redis.execute('LLEN', f'chats/{chat_id}/unread/{member_id}')
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if isinstance(unread, int):
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return unread
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else:
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return 0
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# NOTE: not an API handler
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async def load_messages(chat_id: str, limit: int = 5, offset: int = 0, ids: Optional[List[int]] = None):
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"""load :limit messages for :chat_id with :offset"""
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logger.info('load_messages')
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messages = []
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try:
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message_ids = [] + (ids or [])
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if limit:
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mids = await redis.execute('LRANGE', f'chats/{chat_id}/message_ids', offset, offset + limit)
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if isinstance(mids, list):
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message_ids.extend(mids)
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if message_ids:
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message_keys = [f'chats/{chat_id}/messages/{mid}' for mid in message_ids]
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messages = await redis.execute('MGET', *message_keys)
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if isinstance(messages, list):
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messages = [json.loads(m) if isinstance(m, str) else m for m in messages]
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replies = []
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for m in messages:
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if m:
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reply_to = m.get('reply_to')
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if reply_to:
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reply_to = int(reply_to)
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if reply_to not in message_ids:
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replies.append(reply_to)
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if replies:
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more_messages = await load_messages(chat_id, offset, limit, replies)
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if isinstance(more_messages, list):
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messages.extend(more_messages)
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except Exception as ex:
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logger.error(ex)
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import traceback
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traceback.print_exc()
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return messages
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@query.field('load_chats')
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@login_required
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async def load_chats(_, info, limit: int = 50, offset: int = 0) -> Dict[str, Union[List[Dict[str, Any]], None]]:
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"""load :limit chats of current user with :offset"""
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logger.info('load_chats')
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author_id = info.context['author_id']
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chats = []
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try:
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if author_id:
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logger.debug('got author', author_id)
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cids = await redis.execute('SMEMBERS', f'chats_by_author/{author_id}')
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logger.debug('got cids', cids)
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members_online = (await redis.execute('SMEMBERS', 'authors-online')) or [] # to show online status
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logger.debug('members online', members_online)
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if isinstance(cids, set):
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# TODO: add sort by chat.created_at with in-memory caching chats service
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cids = list(cids)[offset : (offset + limit)]
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lock = asyncio.Lock()
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if len(cids) == 0:
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logger.debug(f'no chats for user with id={author_id}')
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r = await create_chat(None, info, members=[2]) # member with id = 2 is discours
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logger.debug(f"created chat: {r['chat_id']}")
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cids.append(r['chat']['id'])
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logger.debug(f"getting data for {len(cids)} user's chats")
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for cid in cids:
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async with lock:
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chat_str = await redis.execute('GET', f'chats/{cid}')
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if isinstance(chat_str, str):
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logger.debug(f'redis GET by {cid}: {chat_str}')
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c: ChatPayload = json.loads(chat_str)
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c['messages'] = (await load_messages(cid, 5, 0)) or []
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c['unread'] = await get_unread_counter(cid, author_id)
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member_ids = c['members'].copy()
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c['members'] = []
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for member_id in member_ids:
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a = CacheStorage.authors_by_id.get(str(member_id))
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if a:
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a['online'] = a.get('id') in members_online
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c['members'].append(a)
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else:
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logger.error(f'cant find author by id {member_id}')
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chats.append(c)
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else:
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logger.error(f'cant find chat by id {cid}')
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except Exception:
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import traceback
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traceback.print_exc()
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return {'chats': chats, 'error': None}
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@query.field('load_messages_by')
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@login_required
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async def load_messages_by(_, info, by, limit: int = 10, offset: int = 0):
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"""load :limit messages of :chat_id with :offset"""
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logger.info('load_messages_by')
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author_id = info.context['author_id']
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author_chats = await redis.execute('SMEMBERS', f'chats_by_author/{author_id}')
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try:
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if isinstance(author_chats, set):
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author_chats = list(author_chats)
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messages = []
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by_chat = by.get('chat')
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if by_chat in author_chats:
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chat = await redis.execute('GET', f'chats/{by_chat}')
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if not chat:
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return {'messages': [], 'error': 'chat not exist'}
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# everyone's messages in filtered chat
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messages = await load_messages(by_chat, limit, offset)
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if isinstance(messages, list):
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sorted_messages = [m for m in messages if m and m.get('created_at')]
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return {
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'messages': sorted(
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sorted_messages,
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key=lambda m: m.get('created_at'),
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),
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'error': None,
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}
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except Exception as exc:
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logger.error(exc)
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import traceback
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traceback.print_exc()
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return {'error': 'Cannot get messages of this chat'}
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