50 lines
1 KiB
Go
50 lines
1 KiB
Go
package core
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import (
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"time"
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"github.com/benbjohnson/clock"
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"github.com/samber/lo"
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)
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type meterEnergy struct {
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clock clock.Clock
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updated time.Time
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meter *float64 // kWh
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Accumulated float64 `json:"accumulated"` // kWh
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}
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// AccumulatedEnergy returns the accumulated energy in kWh
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func (m *meterEnergy) AccumulatedEnergy() float64 {
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return m.Accumulated
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}
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// AddMeterTotal adds the difference to the last total meter value in kWh
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func (m *meterEnergy) AddMeterTotal(v float64) {
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defer func() {
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m.updated = m.clock.Now()
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m.meter = lo.ToPtr(v)
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}()
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if m.meter == nil {
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return
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}
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m.Accumulated += v - *m.meter
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}
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// AddEnergy adds the given energy in kWh
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func (m *meterEnergy) AddEnergy(v float64) {
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defer func() { m.updated = m.clock.Now() }()
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if m.updated.IsZero() {
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return
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}
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m.Accumulated += v
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}
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// AddPower adds the given power in W, calculating the energy based on the time since the last update
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func (m *meterEnergy) AddPower(v float64) {
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m.AddEnergy(v * m.clock.Since(m.updated).Hours() / 1e3)
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}
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