feat: balance and reward

queries/balance/api/__init__.py

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+from .requests import (
+    get_balance_transactions,
+    get_balance_info
+)

queries/balance/api/requests.py

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+import database
+from ..schemas.requests import *
+from ..schemas.responses import *
+from ..schemas.entities import *
+
+
+def get_balance_transactions(data: dict):
+    items_per_page = 5
+    request = GetBalanceTransactionsRequest.model_validate(data)
+    page = max([request.page - 1, 0])
+    query = (database.BalanceTransaction.query
+             .filter(database.BalanceTransaction.user_id == request.user_id)
+             .order_by(database.BalanceTransaction.created_at.desc())
+             .offset(items_per_page * page)
+             .limit(items_per_page)
+             .all())
+    balance_transactions = [BalanceTransaction.model_validate(balance_transaction) for balance_transaction in query]
+    response = GetBalanceTransactionsResponse(balance_transactions=balance_transactions)
+    return response.to_dict()
+
+
+def get_balance_info(data: dict):
+    request = GetBalanceInfoRequest.model_validate(data)
+    balance = (database.User.query
+               .filter_by(id=request.user_id)
+               .with_entities(database.User.balance)
+               .scalar())
+    response = GetBalanceInfoResponse(balance=balance)
+    return response.to_dict()

queries/balance/schemas/entities.py

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+from datetime import datetime
+
+from schemas.base import CommonModel
+
+
+class BalanceTransaction(CommonModel):
+    id: int
+    type: int
+    user_id: int
+    amount: float
+    description: str
+    json_data: dict | None = None
+    created_at: datetime

queries/balance/schemas/requests.py

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+from schemas.base import CommonModel
+
+
+class GetBalanceTransactionsRequest(CommonModel):
+    page: int
+    user_id: int
+
+
+class GetBalanceInfoRequest(CommonModel):
+    user_id: int

queries/balance/schemas/responses.py

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+from typing import List
+
+from schemas.base import CommonModel
+from .entities import BalanceTransaction
+
+
+class GetBalanceTransactionsResponse(CommonModel):
+    balance_transactions: List[BalanceTransaction]
+
+
+class GetBalanceInfoResponse(CommonModel):
+    balance: float