Add rudimentary support for budget plans

from dataclasses import dataclass

from .BudgetaryItem import BudgetaryItem

@dataclass(frozen=True, eq=False)

class BudgetPlan:

    items: dict[str, BudgetaryItem]

import csv

from pathlib import Path

from typing import Sequence

from .BudgetPlan import BudgetPlan

from .BudgetaryItem import BudgetaryItem

from ..amount.AmountParser import parse_euro_amount

def _is_budgetary_item_row(row: Sequence[str]) -> bool:

    return len(row) >= 3 and row[0] and row[1] and row[2]

def load_csv(csv_path: Path | str) -> BudgetPlan:

    with open(csv_path, newline="") as f:

        reader = csv.reader(f)

        items = [

            BudgetaryItem(id=row[0], name=row[1], amount=parse_euro_amount(row[2]))

            for row in reader

            if _is_budgetary_item_row(row)

        ]

    return BudgetPlan({item.id: item for item in items})

from dataclasses import dataclass

from decimal import Decimal

@dataclass(frozen=True, eq=False)

class BudgetaryItem:

    """Entry in a budget plan.

    Has an id, a name and an amount, e.g.,

    740.0208, Projekte und Veranstaltungen kultureller Art, 550.00 €

    """

    id: str

    name: str

    amount: Decimal