grid_tariffs/
taxes.rs

1use chrono::NaiveDate;
2use serde::Serialize;
3
4use crate::{Money, helpers::date};
5
6pub(crate) static SE_TAXES: &[Tax] = &[
7    Tax::new(
8        "Energiskatt",
9        Money::from_inner(54875),
10        TaxAppliedBy::KwhConsumed,
11        date(2025, 1, 1),
12        Some(date(2025, 12, 31)),
13    ),
14    Tax::new(
15        "Energiskatt",
16        Money::from_inner(44995),
17        TaxAppliedBy::KwhConsumed,
18        date(2026, 1, 1),
19        None,
20    ),
21];
22
23#[derive(Debug, Clone, Copy, Serialize)]
24#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
25pub enum TaxAppliedBy {
26    KwhConsumed,
27}
28
29#[derive(Debug, Clone, Copy, Serialize)]
30#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
31pub struct Tax {
32    description: &'static str,
33    amount: Money,
34    applied_by: TaxAppliedBy,
35    from_date: NaiveDate,
36    /// Last date when this tax applies
37    to_date: Option<NaiveDate>,
38}
39
40impl Tax {
41    pub(crate) const fn new(
42        description: &'static str,
43        amount: Money,
44        applied_by: TaxAppliedBy,
45        from_date: NaiveDate,
46        to_date: Option<NaiveDate>,
47    ) -> Self {
48        Self {
49            description,
50            amount,
51            applied_by,
52            from_date,
53            to_date,
54        }
55    }
56
57    pub fn amount(&self) -> Money {
58        self.amount
59    }
60
61    pub(crate) fn valid_for(&self, today: NaiveDate) -> bool {
62        today >= self.from_date && self.to_date.is_none_or(|to_date| today <= to_date)
63    }
64
65    pub(crate) fn is_kwh_based(&self) -> bool {
66        matches!(self.applied_by, TaxAppliedBy::KwhConsumed)
67    }
68}
grid_tariffs/taxes.rs

grid_tariffs/
taxes.rs
