107 lines
2.1 KiB
Go
107 lines
2.1 KiB
Go
package tariff
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import (
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"errors"
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"slices"
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"sync"
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"time"
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"github.com/cenkalti/backoff/v4"
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"github.com/evcc-io/evcc/api"
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"github.com/evcc-io/evcc/tariff/octopus"
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"github.com/evcc-io/evcc/util"
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"github.com/evcc-io/evcc/util/request"
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)
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type Octopus struct {
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log *util.Logger
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uri string
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region string
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data *util.Monitor[api.Rates]
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}
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var _ api.Tariff = (*Octopus)(nil)
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func init() {
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registry.Add("octopusenergy", NewOctopusFromConfig)
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}
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func NewOctopusFromConfig(other map[string]interface{}) (api.Tariff, error) {
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var cc struct {
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Region string
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Tariff string
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}
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if err := util.DecodeOther(other, &cc); err != nil {
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return nil, err
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}
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if cc.Region == "" {
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return nil, errors.New("missing region")
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}
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if cc.Tariff == "" {
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return nil, errors.New("missing tariff code")
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}
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t := &Octopus{
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log: util.NewLogger("octopus"),
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uri: octopus.ConstructRatesAPI(cc.Tariff, cc.Region),
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region: cc.Tariff,
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data: util.NewMonitor[api.Rates](2 * time.Hour),
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}
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done := make(chan error)
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go t.run(done)
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err := <-done
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return t, err
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}
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func (t *Octopus) run(done chan error) {
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var once sync.Once
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client := request.NewHelper(t.log)
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bo := newBackoff()
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tick := time.NewTicker(time.Hour)
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for ; true; <-tick.C {
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var res octopus.UnitRates
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if err := backoff.Retry(func() error {
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return client.GetJSON(t.uri, &res)
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}, bo); err != nil {
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once.Do(func() { done <- err })
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t.log.ERROR.Println(err)
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continue
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}
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data := make(api.Rates, 0, len(res.Results))
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for _, r := range res.Results {
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ar := api.Rate{
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Start: r.ValidityStart,
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End: r.ValidityEnd,
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// UnitRates are supplied inclusive of tax, though this could be flipped easily with a config flag.
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Price: r.PriceInclusiveTax / 1e2,
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}
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data = append(data, ar)
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}
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data.Sort()
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t.data.Set(data)
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once.Do(func() { close(done) })
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}
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}
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// Rates implements the api.Tariff interface
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func (t *Octopus) Rates() (api.Rates, error) {
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var res api.Rates
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err := t.data.GetFunc(func(val api.Rates) {
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res = slices.Clone(val)
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})
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return res, err
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}
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// Type implements the api.Tariff interface
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func (t *Octopus) Type() api.TariffType {
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return api.TariffTypePriceForecast
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}
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