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