126 lines
4.8 KiB
Python
126 lines
4.8 KiB
Python
import asyncio
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import json
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from typing import Any, Dict, List, Optional, Union
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from services.auth import login_required
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from services.core import get_author, get_network
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from services.rediscache import redis
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from services.schema import query
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from validators.chat import Message, ChatPayload
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from validators.member import ChatMember
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from .chats import create_chat
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async def get_unread_counter(chat_id: str, author_id: int) -> int:
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unread = await redis.execute("LLEN", f"chats/{chat_id}/unread/{author_id}")
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return unread or 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) -> List[Message]:
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"""load :limit messages for :chat_id with :offset"""
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if ids is None:
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ids = []
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messages = []
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try:
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message_ids = [] + ids
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if limit:
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mids = (await redis.lrange(f"chats/{chat_id}/message_ids", offset, offset + limit)) or []
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message_ids += 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.mget(*message_keys)) or []
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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("replyTo")
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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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messages += await load_messages(chat_id, offset, limit, replies)
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except Exception:
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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("loadChats")
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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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author_id = info.context["author_id"]
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cids = (await redis.execute("SMEMBERS", f"chats_by_author/{author_id}")) or []
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members_online = (await redis.execute("SMEMBERS", "authors-online")) or []
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cids = list(cids)[offset : (offset + limit)]
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chats = []
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lock = asyncio.Lock()
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if len(cids) == 0:
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print(f"[resolvers.load] 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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print(f"[resolvers.load] created chat: {r['chat']}")
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cids.append(r["chat"]["id"])
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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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print(f"[resolvers.load] redis GET by {cid}: {chat_str}")
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if chat_str:
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c: ChatPayload = json.loads(chat_str)
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c["messages"] = await load_messages(cid, 5, 0)
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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: ChatMember = await get_author(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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chats.append(c)
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return {"chats": chats, "error": None}
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@query.field("loadMessagesBy")
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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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author_id = info.context["author_id"]
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user_chats = (await redis.execute("SMEMBERS", "chats_by_author/" + str(author_id))) or []
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user_chats = [c for c in user_chats]
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if user_chats:
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messages = []
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by_chat = by.get("chat")
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if by_chat in user_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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return {
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"messages": sorted(
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[m for m in messages if m.get("createdAt")],
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key=lambda m: m.get("createdAt"),
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),
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"error": None,
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}
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else:
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return {"error": "Cannot access messages of this chat"}
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@query.field("loadRecipients")
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async def load_recipients(_, _info, limit=50, offset=0):
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"""load possible chat participants"""
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onliners = (await redis.execute("SMEMBERS", "authors-online")) or []
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members = []
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all_authors: List[ChatMember] = await get_network(limit, offset)
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for a in all_authors:
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a["online"] = a["id"] in onliners
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members.append(a)
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# NOTE: maybe sort members here
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print(f"[resolvers.load] loadRecipients found {len(members)} members")
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return {"members": members, "error": None}
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