102 lines
4 KiB
Python
102 lines
4 KiB
Python
from sqlalchemy import insert, select, update, and_
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from app.dao.base import BaseDAO
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from app.database import async_session_maker
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from app.users.models import Users
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from app.users.chat.models import Chats, Messages, UsersXChats
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class ChatDAO(BaseDAO):
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model = Chats
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@classmethod
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async def create(cls, user_id: int, chat_name: str, created_by: int) -> int:
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query = insert(Chats).values(chat_for=user_id, chat_name=chat_name, created_by=created_by).returning(Chats.id)
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async with async_session_maker() as session:
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result = await session.execute(query)
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await session.commit()
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result = result.scalar()
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return result
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@classmethod
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async def add_user_to_chat(cls, user_id: int, chat_id: int):
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query = insert(UsersXChats).values(user_id=user_id, chat_id=chat_id)
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async with async_session_maker() as session:
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await session.execute(query)
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await session.commit()
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return True
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@classmethod
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async def send_message(cls, user_id, chat_id: int, message: str):
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query = (insert(Messages).values(chat_id=chat_id, user_id=user_id, message=message, image_url=None)
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.returning(Messages.id))
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async with async_session_maker() as session:
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result = await session.execute(query)
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await session.commit()
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return result.scalar()
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@classmethod
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async def get_message_by_id(cls, message_id: int):
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query = (select(Messages.message, Messages.image_url, Messages.chat_id, Messages.user_id,
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Messages.created_at, Users.avatar_image, Users.username).select_from(Messages)
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.join(Users, Users.id == Messages.user_id)
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.where(
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and_(
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Messages.id == message_id,
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Messages.visibility == True
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)
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))
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async with async_session_maker() as session:
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result = await session.execute(query)
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result = result.mappings().all()
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if result:
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return result[0]
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@classmethod
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async def delete_message(cls, message_id: int):
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query = update(Messages).where(Messages.id == message_id).values(visibility=False)
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async with async_session_maker() as session:
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await session.execute(query)
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await session.commit()
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return True
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@classmethod
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async def delete_chat(cls, chat_id: int, user_id: int):
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pass
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@classmethod
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async def get_some_messages(cls, chat_id: int, message_number_from: int, messages_to_get: int):
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"""
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WITH messages_with_users AS (
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SELECT *
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FROM messages
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LEFT JOIN users ON messages.user_id = users.id
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)
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SELECT message, image_url, chat_id, user_id, created_at, avatar_image
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FROM messages_with_users
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WHERE visibility = true AND chat_id = 2
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ORDER BY created_at DESC
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LIMIT 15 OFFSET 0;
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"""
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messages_with_users = (
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select(Messages.__table__.columns, Users.__table__.columns)
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.select_from(Messages)
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.join(Users, Messages.user_id == Users.id)).cte('messages_with_users')
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messages = (select(messages_with_users.c.message, messages_with_users.c.image_url,
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messages_with_users.c.chat_id, messages_with_users.c.user_id,
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messages_with_users.c.created_at, messages_with_users.c.avatar_image,
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messages_with_users.c.username
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)
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.where(
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and_(
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messages_with_users.c.chat_id == chat_id,
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messages_with_users.c.visibility == True
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)
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).order_by(messages_with_users.c.created_at.desc()).limit(messages_to_get).offset(message_number_from))
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async with async_session_maker() as session:
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result = await session.execute(messages)
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result = result.mappings().all()
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if result:
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return result
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