84 lines
1.5 KiB
Go
84 lines
1.5 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, Solar api.Tariff
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}
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// At returns the rate at the given time
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func At(t api.Tariff, ts time.Time) (api.Rate, 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.At(ts); err == nil {
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return r, nil
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}
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}
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}
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return api.Rate{}, api.ErrNotAvailable
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}
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// Now returns the price/cost/value at the given time
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func Now(t api.Tariff) (float64, error) {
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r, err := At(t, time.Now())
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return r.Value, err
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}
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// Rates returns the tariffs rates if not nil
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func Rates(t api.Tariff) api.Rates {
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if t == nil {
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return nil
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}
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rr, err := t.Rates()
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if err != nil {
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return nil
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}
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return rr
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}
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func (t *Tariffs) Get(u api.TariffUsage) api.Tariff {
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switch u {
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case api.TariffUsageCo2:
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return t.Co2
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case api.TariffUsageFeedIn:
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return t.FeedIn
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case api.TariffUsageGrid:
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return t.Grid
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// TODO solar
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case api.TariffUsagePlanner:
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switch {
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case t.Planner != nil:
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// prio 0: manually set planner tariff
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return t.Planner
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case t.Grid != nil && t.Grid.Type() == api.TariffTypePriceForecast:
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// prio 1: grid tariff with forecast
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return t.Grid
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case t.Co2 != nil:
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// prio 2: co2 tariff
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return t.Co2
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default:
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// prio 3: static grid tariff
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return t.Grid
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}
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case api.TariffUsageSolar:
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return t.Solar
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default:
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return nil
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}
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}
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