297 lines
9.8 KiB
Python
297 lines
9.8 KiB
Python
from sqlalchemy import insert, select, update, delete, func
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from sqlalchemy.exc import IntegrityError, NoResultFound
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from sqlalchemy.orm import aliased
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from app.dao.base import BaseDAO
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from app.database import engine # noqa
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from app.chat.exceptions import (
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UserAlreadyInChatException,
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UserAlreadyPinnedChatException,
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MessageNotFoundException,
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MessageAlreadyPinnedException,
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)
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from app.chat.shemas import SMessage, SMessageList, SPinnedMessages
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from app.models.users import Users
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from app.models.message_answer import MessageAnswer
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from app.models.chat import Chats
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from app.models.message import Message
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from app.models.pinned_chat import PinnedChat
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from app.models.pinned_message import PinnedMessage
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from app.models.user_chat import UserChat
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class ChatDAO(BaseDAO):
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model = Chats
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async def find_one_or_none(self, **filter_by):
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query = select(Chats.__table__.columns).filter_by(**filter_by)
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result = await self.session.execute(query)
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result = result.mappings().one_or_none()
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return result
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async def create_chat(self, user_id: int, chat_name: str, created_by: int) -> int:
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stmt = insert(Chats).values(chat_for=user_id, chat_name=chat_name, created_by=created_by).returning(Chats.id)
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result = await self.session.execute(stmt)
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chat_id = result.scalar()
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return chat_id
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async def add_user_to_chat(self, user_id: int, chat_id: int) -> None:
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try:
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stmt = insert(UserChat).values(user_id=user_id, chat_id=chat_id)
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await self.session.execute(stmt)
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except IntegrityError:
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raise UserAlreadyInChatException
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async def send_message(self, user_id: int, chat_id: int, message: str, image_url: str | None = None) -> int:
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stmt = (
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insert(Message)
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.values(chat_id=chat_id, user_id=user_id, message=message, image_url=image_url)
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.returning(Message.id)
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)
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result = await self.session.execute(stmt)
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return result.scalar()
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async def get_message_by_id(self, message_id: int) -> SMessage:
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try:
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msg = aliased(Message, name="msg")
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query = (
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select(
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func.json_build_object(
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"id", Message.id,
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"message", Message.message,
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"image_url", Message.image_url,
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"chat_id", Message.chat_id,
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"user_id", Message.user_id,
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"created_at", Message.created_at,
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"avatar_image", Users.avatar_image,
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"username", Users.username,
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"answer_id", MessageAnswer.answer_id,
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"answer_message", select(
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msg.message
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)
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.select_from(MessageAnswer)
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.join(msg, msg.id == MessageAnswer.answer_id, isouter=True)
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.where(MessageAnswer.self_id == Message.id, msg.visibility == True) # noqa: E712
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.scalar_subquery()
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)
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)
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.select_from(Message)
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.join(Users, Users.id == Message.user_id)
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.join(MessageAnswer, Message.id == MessageAnswer.self_id, isouter=True)
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.where(Message.id == message_id, Message.visibility == True) # noqa: E712
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)
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result = await self.session.execute(query)
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result = result.scalar_one()
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return SMessage.model_validate(result)
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except NoResultFound:
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raise MessageNotFoundException
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async def delete_message(self, message_id: int) -> None:
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stmt = update(Message).where(Message.id == message_id).values(visibility=False)
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await self.session.execute(stmt)
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async def get_some_messages(self, chat_id: int, message_number_from: int, messages_to_get: int) -> SMessageList:
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msg = aliased(Message, name="msg")
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messages_with_users = (
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select(
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Message.id,
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Message.message,
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Message.image_url,
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Message.chat_id,
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Message.user_id,
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Message.created_at,
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Message.visibility,
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Users.username,
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Users.avatar_image,
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MessageAnswer.self_id,
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MessageAnswer.answer_id,
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(
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select(msg.message)
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.select_from(MessageAnswer)
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.join(msg, msg.id == MessageAnswer.answer_id, isouter=True)
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.where(MessageAnswer.self_id == Message.id, msg.visibility == True) # noqa: E712
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.scalar_subquery()
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).label("answer_message"),
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)
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.select_from(Message)
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.join(Users, Message.user_id == Users.id)
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.join(MessageAnswer, MessageAnswer.self_id == Message.id, isouter=True)
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.where(Message.chat_id == chat_id, Message.visibility == True) # noqa: E712
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.order_by(Message.created_at.desc())
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.limit(messages_to_get)
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.offset(message_number_from)
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.cte("messages_with_users")
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)
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query = (
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select(
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func.json_build_object(
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"messages",
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func.json_agg(
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func.json_build_object(
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"id", messages_with_users.c.id,
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"message", messages_with_users.c.message,
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"image_url", messages_with_users.c.image_url,
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"chat_id", messages_with_users.c.chat_id,
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"user_id", messages_with_users.c.user_id,
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"created_at", messages_with_users.c.created_at,
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"avatar_image", messages_with_users.c.avatar_image,
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"username", messages_with_users.c.username,
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"answer_id", messages_with_users.c.answer_id,
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"answer_message", messages_with_users.c.answer_message,
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)
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)
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)
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).select_from(messages_with_users)
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)
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result = await self.session.execute(query)
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result = result.scalar()
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return SMessageList.model_validate(result)
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async def edit_message(self, message_id: int, new_message: str, new_image_url: str) -> None:
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stmt = update(Message).where(Message.id == message_id).values(message=new_message, image_url=new_image_url)
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await self.session.execute(stmt)
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async def add_answer(self, self_id: int, answer_id: int) -> None:
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stmt = (
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insert(MessageAnswer)
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.values(self_id=self_id, answer_id=answer_id)
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)
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await self.session.execute(stmt)
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async def delete_chat(self, chat_id: int) -> None:
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stmt = update(Chats).where(Chats.id == chat_id).values(visibility=False)
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await self.session.execute(stmt)
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async def delete_user_from_chat(self, chat_id: int, user_id: int) -> None:
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stmt = delete(UserChat).where(UserChat.chat_id == chat_id, UserChat.user_id == user_id)
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await self.session.execute(stmt)
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async def pin_chat(self, chat_id: int, user_id: int) -> None:
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try:
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stmt = insert(PinnedChat).values(chat_id=chat_id, user_id=user_id)
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await self.session.execute(stmt)
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except IntegrityError:
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raise UserAlreadyPinnedChatException
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async def unpin_chat(self, chat_id: int, user_id: int) -> None:
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stmt = delete(PinnedChat).where(PinnedChat.chat_id == chat_id, PinnedChat.user_id == user_id)
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await self.session.execute(stmt)
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async def get_pinned_chats(self, user_id: int):
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chats_with_descriptions = (
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select(UserChat.__table__.columns, Chats.__table__.columns)
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.select_from(UserChat)
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.join(Chats, UserChat.chat_id == Chats.id)
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.cte("chats_with_descriptions")
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)
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chats_with_avatars = (
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select(
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chats_with_descriptions.c.chat_id,
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chats_with_descriptions.c.chat_for,
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chats_with_descriptions.c.chat_name,
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chats_with_descriptions.c.visibility,
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Users.id,
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Users.avatar_image,
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)
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.select_from(chats_with_descriptions)
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.join(Users, Users.id == chats_with_descriptions.c.user_id)
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.cte("chats_with_avatars")
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)
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query = (
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select(
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chats_with_avatars.c.chat_id,
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chats_with_avatars.c.chat_for,
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chats_with_avatars.c.chat_name,
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chats_with_avatars.c.avatar_image,
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)
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.distinct()
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.select_from(PinnedChat)
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.join(chats_with_avatars, PinnedChat.chat_id == chats_with_avatars.c.chat_id) # noqa
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.where(chats_with_avatars.c.id == user_id, chats_with_avatars.c.visibility == True) # noqa: E712
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)
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# print(query.compile(engine, compile_kwargs={"literal_binds": True})) # Проверка SQL запроса
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result = await self.session.execute(query)
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result = result.mappings().all()
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return result
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async def pin_message(self, chat_id: int, message_id: int, user_id: int) -> None:
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try:
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stmt = insert(PinnedMessage).values(chat_id=chat_id, message_id=message_id, user_id=user_id)
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await self.session.execute(stmt)
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except IntegrityError:
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raise MessageAlreadyPinnedException
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async def unpin_message(self, chat_id: int, message_id: int) -> None:
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stmt = delete(PinnedMessage).where(PinnedMessage.chat_id == chat_id, PinnedMessage.message_id == message_id)
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await self.session.execute(stmt)
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async def get_pinned_messages(self, chat_id: int) -> SPinnedMessages:
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msg = aliased(Message, name="msg")
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messages_with_users = (
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select(
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Message.id,
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Message.message,
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Message.image_url,
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Message.chat_id,
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Message.user_id,
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Message.created_at,
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Message.visibility,
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Users.username,
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Users.avatar_image,
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MessageAnswer.self_id,
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MessageAnswer.answer_id,
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(
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select(msg.message)
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.select_from(MessageAnswer)
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.join(msg, msg.id == MessageAnswer.answer_id, isouter=True)
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.where(MessageAnswer.self_id == Message.id, msg.visibility == True) # noqa: E712
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.scalar_subquery()
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).label("answer_message"),
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)
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.select_from(PinnedMessage)
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.join(Message, PinnedMessage.message_id == Message.id)
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.join(Users, Message.user_id == Users.id)
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.join(MessageAnswer, MessageAnswer.self_id == Message.id, isouter=True)
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.where(PinnedMessage.chat_id == chat_id, Message.visibility == True) # noqa: E712
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.order_by(Message.created_at.desc())
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.cte("messages_with_users")
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)
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query = (
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select(
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func.json_build_object(
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"pinned_messages",
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func.json_agg(
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func.json_build_object(
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"id", messages_with_users.c.id,
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"message", messages_with_users.c.message,
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"image_url", messages_with_users.c.image_url,
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"chat_id", messages_with_users.c.chat_id,
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"user_id", messages_with_users.c.user_id,
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"created_at", messages_with_users.c.created_at,
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"avatar_image", messages_with_users.c.avatar_image,
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"username", messages_with_users.c.username,
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"answer_id", messages_with_users.c.answer_id,
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"answer_message", messages_with_users.c.answer_message,
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)
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)
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)
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).select_from(messages_with_users)
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)
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result = await self.session.execute(query)
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result = result.scalar_one()
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return SPinnedMessages.model_validate(result)
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