60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package tariff
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import (
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"time"
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"github.com/evcc-io/evcc/api"
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"golang.org/x/text/currency"
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)
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type Tariffs struct {
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Currency currency.Unit
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Grid, FeedIn, Co2, Planner api.Tariff
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}
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func NewTariffs(currency currency.Unit, grid, feedin, co2 api.Tariff, planner api.Tariff) *Tariffs {
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return &Tariffs{
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Currency: currency,
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Grid: grid,
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FeedIn: feedin,
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Co2: co2,
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Planner: planner,
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}
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}
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func currentPrice(t api.Tariff) (float64, error) {
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if t != nil {
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if rr, err := t.Rates(); err == nil {
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if r, err := rr.Current(time.Now()); err == nil {
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return r.Price, nil
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}
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}
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}
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return 0, api.ErrNotAvailable
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}
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// CurrentGridPrice returns the current grid price.
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func (t *Tariffs) CurrentGridPrice() (float64, error) {
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return currentPrice(t.Grid)
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}
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// CurrentFeedInPrice returns the current feed-in price.
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func (t *Tariffs) CurrentFeedInPrice() (float64, error) {
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return currentPrice(t.FeedIn)
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}
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// CurrentCo2 determines the grids co2 emission.
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func (t *Tariffs) CurrentCo2() (float64, error) {
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if t.Co2 != nil {
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return currentPrice(t.Co2)
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}
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return 0, api.ErrNotAvailable
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}
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// outdatedError returns api.ErrOutdated if t is older than 2*d
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func outdatedError(t time.Time, d time.Duration) error {
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if time.Since(t) > 2*d {
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return api.ErrOutdated
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}
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return nil
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}
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