335 lines
9.5 KiB
Python
335 lines
9.5 KiB
Python
import json
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import uuid
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import asyncio
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from datetime import datetime
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from auth.authenticate import login_required
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from base.redis import redis
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from base.resolvers import mutation, query, subscription
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from services.inbox import MessageResult, MessagesStorage, ChatFollowing
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async def get_unread_counter(chat_id: str, user_slug: str):
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try:
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return int(await redis.execute("LLEN", f"chats/{chat_id}/unread/{user_slug}"))
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except Exception:
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return 0
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async def get_total_unread_counter(user_slug: str):
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chats = await redis.execute("GET", f"chats_by_user/{user_slug}")
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if not chats:
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return 0
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chats = json.loads(chats)
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unread = 0
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for chat_id in chats:
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n = await get_unread_counter(chat_id, user_slug)
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unread += n
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return unread
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async def add_user_to_chat(user_slug: str, chat):
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chats_ids = await redis.execute("GET", f"chats_by_user/{user_slug}")
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if chats_ids:
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chats_ids = list(json.loads(chats_ids))
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else:
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chats_ids = []
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if chat.id not in chats_ids:
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chats_ids.append(chat.id)
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await redis.execute("SET", f"chats_by_user/{user_slug}", json.dumps(chats_ids))
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if user_slug not in chat["users"]:
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chat["users"].append(user_slug)
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chat["updatedAt"] = datetime.now().timestamp()
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await redis.execute("SET", f"chats/{chat.id}", json.dumps(chat))
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return chat
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@mutation.field("inviteChat")
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async def invite_to_chat(_, info, invited: str, chat_id: str):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chat_id}")
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if user.slug not in chat['users']:
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# TODO: check right to invite here
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chat = await add_user_to_chat(invited, chat_id, chat)
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return {
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"error": None,
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"chat": chat
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}
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@mutation.field("updateChat")
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@login_required
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async def update_chat(_, info, chat_new):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chat_new.id}")
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chat.update({
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"title": chat_new.title,
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"description": chat_new.description,
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"updatedAt": datetime.now().timestamp(),
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})
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await redis.execute("SET", f"chats/{chat.id}", json.dumps(chat))
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await redis.execute("SET", f"chats/{chat.id}/next_message_id", 0)
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chat = await add_user_to_chat(user.slug, chat.id)
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return {
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"error": None,
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"chat": chat
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}
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@mutation.field("createChat")
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@login_required
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async def create_chat(_, info, title="", members=[]):
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user = info.context["request"].user
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if user.slug not in members:
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members.append(user.slug)
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chat_id = str(uuid.uuid4())
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chat = {
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"title": title,
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"createdAt": datetime.now().timestamp(),
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"updatedAt": datetime.now().timestamp(),
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"createdBy": user.slug,
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"id": chat_id,
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"users": members,
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}
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await redis.execute("SET", f"chats/{chat_id}", json.dumps(chat))
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await redis.execute("SET", f"chats/{chat_id}/next_message_id", str(0))
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chat = await add_user_to_chat(user.slug, chat_id)
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return {
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"error": None,
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"chat": chat
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}
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async def load_messages(chatId: str, offset: int, amount: int):
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messages = []
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message_ids = await redis.lrange(
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f"chats/{chatId}/message_ids", 0 - offset - amount, 0 - offset
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)
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if message_ids:
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message_keys = [
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f"chats/{chatId}/messages/{mid}" for mid in message_ids
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]
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messages = await redis.mget(*message_keys)
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messages = [json.loads(msg) for msg in messages]
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return {
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"messages": messages,
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"error": None
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}
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async def get_chats_by_user(slug: str):
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chats = await redis.execute("GET", f"chats_by_user/{slug}")
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return chats or []
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@query.field("myChats")
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@login_required
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async def user_chats(_, info):
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user = info.context["request"].user
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chats = await get_chats_by_user(user.slug)
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if not chats:
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chats = []
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for c in chats:
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c['messages'] = await load_messages(c['id'])
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c['unread'] = await get_unread_counter(c['id'], user.slug)
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return {
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"chats": chats,
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"error": None
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}
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@mutation.field("enterChat")
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@login_required
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async def enter_chat(_, info, chat_id: str):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chat_id}")
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if not chat:
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return {
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"error": "chat not exist"
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}
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else:
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chat = json.loads(chat)
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chat = await add_user_to_chat(user.slug, chat_id, chat)
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chat['messages'] = await load_messages(chat_id)
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return {
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"chat": chat,
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"error": None
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}
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@mutation.field("createMessage")
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@login_required
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async def create_message(_, info, chat_id: str, body: str, replyTo=None):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chat_id}")
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if not chat:
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return {
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"error": "chat not exist"
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}
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message_id = await redis.execute("GET", f"chats/{chat_id}/next_message_id")
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message_id = int(message_id)
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new_message = {
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"chatId": chat_id,
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"id": message_id,
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"author": user.slug,
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"body": body,
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"replyTo": replyTo,
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"createdAt": datetime.now().timestamp(),
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}
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await redis.execute(
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"SET", f"chats/{chat_id}/messages/{message_id}", json.dumps(new_message)
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)
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await redis.execute("LPUSH", f"chats/{chat_id}/message_ids", str(message_id))
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await redis.execute("SET", f"chats/{chat_id}/next_message_id", str(message_id + 1))
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chat = json.loads(chat)
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users = chat["users"]
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for user_slug in users:
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await redis.execute(
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"LPUSH", f"chats/{chat_id}/unread/{user_slug}", str(message_id)
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)
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result = MessageResult("NEW", new_message)
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await MessagesStorage.put(result)
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return {
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"message": new_message,
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"error": None
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}
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@query.field("loadChat")
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@login_required
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async def load_chat_messages(_, info, chat_id: str, offset: int = 0, amount: int = 50):
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chat = await redis.execute("GET", f"chats/{chat_id}")
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if not chat:
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return {
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"error": "chat not exist"
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}
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messages = await load_messages(chat_id, offset, amount)
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return {
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"messages": messages,
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"error": None
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}
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@mutation.field("updateMessage")
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@login_required
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async def update_message(_, info, chat_id: str, message_id: int, body: str):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chat_id}")
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if not chat:
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return {"error": "chat not exist"}
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message = await redis.execute("GET", f"chats/{chat_id}/messages/{message_id}")
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if not message:
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return {"error": "message not exist"}
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message = json.loads(message)
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if message["author"] != user.slug:
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return {"error": "access denied"}
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message["body"] = body
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message["updatedAt"] = datetime.now().timestamp()
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await redis.execute("SET", f"chats/{chat_id}/messages/{message_id}", json.dumps(message))
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result = MessageResult("UPDATED", message)
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await MessagesStorage.put(result)
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return {
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"message": message,
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"error": None
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}
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@mutation.field("deleteMessage")
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@login_required
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async def delete_message(_, info, chat_id: str, message_id: int):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chat_id}")
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if not chat:
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return {"error": "chat not exist"}
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chat = json.loads(chat)
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message = await redis.execute("GET", f"chats/{chat_id}/messages/{str(message_id)}")
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if not message:
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return {"error": "message not exist"}
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message = json.loads(message)
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if message["author"] != user.slug:
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return {"error": "access denied"}
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await redis.execute("LREM", f"chats/{chat_id}/message_ids", 0, str(message_id))
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await redis.execute("DEL", f"chats/{chat_id}/messages/{str(message_id)}")
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users = chat["users"]
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for user_slug in users:
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await redis.execute("LREM", f"chats/{chat_id}/unread/{user_slug}", 0, str(message_id))
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result = MessageResult("DELETED", message)
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await MessagesStorage.put(result)
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return {}
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@mutation.field("markAsRead")
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@login_required
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async def mark_as_read(_, info, chat_id: str, messages: [int]):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chat_id}")
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if not chat:
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return {"error": "chat not exist"}
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chat = json.loads(chat)
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users = set(chat["users"])
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if user.slug not in users:
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return {"error": "access denied"}
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for message_id in messages:
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await redis.execute("LREM", f"chats/{chat_id}/unread/{user.slug}", 0, str(message_id))
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return {
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"error": None
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}
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@subscription.source("newMessage")
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@login_required
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async def message_generator(obj, info):
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try:
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user = info.context["request"].user
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user_following_chats = await get_chats_by_user(user.slug) # chat ids
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tasks = []
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updated = {}
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for chat_id in user_following_chats:
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chat = await redis.execute("GET", f"chats/{chat_id}")
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updated[chat_id] = chat['updatedAt']
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user_following_chats_sorted = sorted(user_following_chats, key=lambda x: updated[x], reverse=True)
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for chat_id in user_following_chats_sorted:
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following_chat = ChatFollowing(chat_id)
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await MessagesStorage.register_chat(following_chat)
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chat_task = following_chat.queue.get()
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tasks.append(chat_task)
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while True:
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msg = await asyncio.gather(*tasks)
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yield msg
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finally:
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await MessagesStorage.remove_chat(following_chat)
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