32 lines
673 B
Go
32 lines
673 B
Go
package api
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import (
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"errors"
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"time"
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)
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// Rate is a grid tariff rate
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type Rate struct {
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Start time.Time `json:"start"`
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End time.Time `json:"end"`
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Price float64 `json:"price"`
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}
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// IsEmpty returns is the rate is the zero value
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func (r Rate) IsEmpty() bool {
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return r.Start.IsZero() && r.End.IsZero() && r.Price == 0
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}
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// Rates is a slice of (future) tariff rates
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type Rates []Rate
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// Current returns the rates current rate or error
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func (r Rates) Current(now time.Time) (Rate, error) {
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for _, rr := range r {
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if (rr.Start.Before(now) || rr.Start.Equal(now)) && rr.End.After(now) {
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return rr, nil
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}
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}
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return Rate{}, errors.New("no matching rate")
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}
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