261 lines
8.7 KiB
Python
261 lines
8.7 KiB
Python
from datetime import date
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from decimal import Decimal
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from typing import Literal
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from fastapi import APIRouter, Depends, HTTPException
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from pydantic import BaseModel, ConfigDict, Field, model_validator
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from sqlalchemy import delete, select
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from sqlalchemy.orm import Session
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from app.auth import require_auth
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from app.db import get_session
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from app.engine.loans import loan_schedule
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from app.models.tables import (Category, Loan, PlannedItem, RecurringItem,
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ScenarioLoan)
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from app.services.suggestions import suggest_recurring
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router = APIRouter(prefix="/api", tags=["planning"],
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dependencies=[Depends(require_auth)])
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# ---------------------------------------------------------------- Recurring
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class RecurringIn(BaseModel):
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name: str
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amount: Decimal
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rhythm: Literal["monthly", "quarterly", "yearly"]
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due_day: int = Field(ge=1, le=31)
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start_date: date | None = None
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end_date: date | None = None
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category_id: int | None = None
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@model_validator(mode="after")
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def _ende_nicht_vor_start(self):
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if (self.start_date is not None and self.end_date is not None
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and self.end_date < self.start_date):
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raise ValueError("Ende darf nicht vor Start liegen")
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return self
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class RecurringOut(RecurringIn):
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model_config = ConfigDict(from_attributes=True)
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id: int
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class RecurringPatch(BaseModel):
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name: str | None = None
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amount: Decimal | None = None
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rhythm: Literal["monthly", "quarterly", "yearly"] | None = None
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due_day: int | None = Field(default=None, ge=1, le=31)
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start_date: date | None = None
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end_date: date | None = None
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category_id: int | None = None
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class SuggestionOut(BaseModel):
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name: str
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amount: Decimal
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rhythm: str
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due_day: int
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category_id: int | None = None
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def _check_category(session: Session, category_id: int | None) -> None:
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if category_id is not None and session.get(Category, category_id) is None:
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raise HTTPException(404, "Kategorie nicht gefunden")
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@router.get("/recurring", response_model=list[RecurringOut])
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def list_recurring(session: Session = Depends(get_session)):
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return [RecurringOut.model_validate(r)
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for r in session.execute(select(RecurringItem)).scalars()]
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@router.post("/recurring", response_model=RecurringOut, status_code=201)
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def create_recurring(data: RecurringIn, session: Session = Depends(get_session)):
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_check_category(session, data.category_id)
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item = RecurringItem(**data.model_dump())
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session.add(item)
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session.commit()
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session.refresh(item)
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return RecurringOut.model_validate(item)
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# Muss vor /recurring/{item_id} stehen, sonst faengt die {id}-Route den Pfad ab.
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@router.get("/recurring/suggestions", response_model=list[SuggestionOut])
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def recurring_suggestions(session: Session = Depends(get_session)):
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return suggest_recurring(session)
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@router.patch("/recurring/{item_id}", response_model=RecurringOut)
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def patch_recurring(item_id: int, data: RecurringPatch,
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session: Session = Depends(get_session)):
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item = session.get(RecurringItem, item_id)
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if item is None:
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raise HTTPException(404, "Fixposten nicht gefunden")
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fields = data.model_dump(exclude_unset=True)
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if "category_id" in fields:
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_check_category(session, fields["category_id"])
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for key, value in fields.items():
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setattr(item, key, value)
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if (item.start_date is not None and item.end_date is not None
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and item.end_date < item.start_date):
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session.rollback()
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raise HTTPException(422, "Ende darf nicht vor Start liegen")
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session.commit()
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session.refresh(item)
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return RecurringOut.model_validate(item)
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@router.delete("/recurring/{item_id}", status_code=204)
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def delete_recurring(item_id: int, session: Session = Depends(get_session)):
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item = session.get(RecurringItem, item_id)
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if item is None:
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raise HTTPException(404, "Fixposten nicht gefunden")
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session.delete(item)
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session.commit()
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# ------------------------------------------------------------------ Planned
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class PlannedIn(BaseModel):
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name: str
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amount: Decimal
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due: date
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category_id: int | None = None
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class PlannedOut(PlannedIn):
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model_config = ConfigDict(from_attributes=True)
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id: int
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class PlannedPatch(BaseModel):
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name: str | None = None
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amount: Decimal | None = None
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due: date | None = None
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category_id: int | None = None
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@router.get("/planned", response_model=list[PlannedOut])
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def list_planned(session: Session = Depends(get_session)):
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return [PlannedOut.model_validate(p)
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for p in session.execute(select(PlannedItem)).scalars()]
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@router.post("/planned", response_model=PlannedOut, status_code=201)
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def create_planned(data: PlannedIn, session: Session = Depends(get_session)):
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_check_category(session, data.category_id)
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item = PlannedItem(**data.model_dump())
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session.add(item)
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session.commit()
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session.refresh(item)
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return PlannedOut.model_validate(item)
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@router.patch("/planned/{item_id}", response_model=PlannedOut)
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def patch_planned(item_id: int, data: PlannedPatch,
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session: Session = Depends(get_session)):
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item = session.get(PlannedItem, item_id)
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if item is None:
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raise HTTPException(404, "Einmalposten nicht gefunden")
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fields = data.model_dump(exclude_unset=True)
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if "category_id" in fields:
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_check_category(session, fields["category_id"])
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for key, value in fields.items():
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setattr(item, key, value)
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session.commit()
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session.refresh(item)
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return PlannedOut.model_validate(item)
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@router.delete("/planned/{item_id}", status_code=204)
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def delete_planned(item_id: int, session: Session = Depends(get_session)):
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item = session.get(PlannedItem, item_id)
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if item is None:
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raise HTTPException(404, "Einmalposten nicht gefunden")
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session.delete(item)
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session.commit()
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# --------------------------------------------------------------------- Loans
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class LoanIn(BaseModel):
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name: str
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principal: Decimal
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annual_rate_pct: Decimal
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term_months: int
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payout_date: date
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repayment_type: Literal["annuity", "bullet"] = "annuity"
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class LoanOut(LoanIn):
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model_config = ConfigDict(from_attributes=True)
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id: int
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class LoanPatch(BaseModel):
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name: str | None = None
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principal: Decimal | None = None
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annual_rate_pct: Decimal | None = None
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term_months: int | None = None
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payout_date: date | None = None
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repayment_type: Literal["annuity", "bullet"] | None = None
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class InstallmentOut(BaseModel):
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due: date
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payment: Decimal
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interest: Decimal
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principal: Decimal
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remaining: Decimal
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@router.get("/loans", response_model=list[LoanOut])
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def list_loans(session: Session = Depends(get_session)):
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return [LoanOut.model_validate(l)
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for l in session.execute(select(Loan)).scalars()]
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@router.post("/loans", response_model=LoanOut, status_code=201)
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def create_loan(data: LoanIn, session: Session = Depends(get_session)):
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loan = Loan(**data.model_dump())
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session.add(loan)
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session.commit()
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session.refresh(loan)
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return LoanOut.model_validate(loan)
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@router.patch("/loans/{loan_id}", response_model=LoanOut)
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def patch_loan(loan_id: int, data: LoanPatch, session: Session = Depends(get_session)):
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loan = session.get(Loan, loan_id)
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if loan is None:
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raise HTTPException(404, "Kredit nicht gefunden")
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for key, value in data.model_dump(exclude_unset=True).items():
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setattr(loan, key, value)
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session.commit()
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session.refresh(loan)
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return LoanOut.model_validate(loan)
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@router.delete("/loans/{loan_id}", status_code=204)
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def delete_loan(loan_id: int, session: Session = Depends(get_session)):
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loan = session.get(Loan, loan_id)
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if loan is None:
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raise HTTPException(404, "Kredit nicht gefunden")
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# Remove scenario assignments first: no DB-level cascade exists, so a
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# dangling ScenarioLoan row would raise a foreign-key violation (500 on
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# Postgres).
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session.execute(delete(ScenarioLoan).where(ScenarioLoan.loan_id == loan_id))
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session.delete(loan)
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session.commit()
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@router.get("/loans/{loan_id}/schedule", response_model=list[InstallmentOut])
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def get_loan_schedule(loan_id: int, session: Session = Depends(get_session)):
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loan = session.get(Loan, loan_id)
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if loan is None:
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raise HTTPException(404, "Kredit nicht gefunden")
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plan = loan_schedule(Decimal(loan.principal), Decimal(loan.annual_rate_pct),
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loan.term_months, loan.payout_date, loan.repayment_type)
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return [InstallmentOut(due=i.due, payment=i.payment, interest=i.interest,
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principal=i.principal, remaining=i.remaining)
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for i in plan]
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