132 lines
2.7 KiB
Go
132 lines
2.7 KiB
Go
package tariff
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import (
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"errors"
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"fmt"
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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/corrently"
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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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"golang.org/x/oauth2"
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)
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type GrünStromIndex struct {
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*request.Helper
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log *util.Logger
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zip string
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data *util.Monitor[api.Rates]
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}
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var _ api.Tariff = (*GrünStromIndex)(nil)
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func init() {
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registry.Add("grünstromindex", NewGrünStromIndexFromConfig)
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}
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func NewGrünStromIndexFromConfig(other map[string]any) (api.Tariff, error) {
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var cc struct {
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Zip string
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Token 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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log := util.NewLogger("gsi").Redact(cc.Zip, cc.Token)
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t := &GrünStromIndex{
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log: log,
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zip: cc.Zip,
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Helper: request.NewHelper(log),
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data: util.NewMonitor[api.Rates](2 * time.Hour),
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}
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t.Client.Transport = &oauth2.Transport{
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Base: t.Client.Transport,
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Source: corrently.TokenSource(log, &oauth2.Token{AccessToken: cc.Token}),
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}
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return runOrError(t)
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}
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func (t *GrünStromIndex) run(done chan error) {
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var once sync.Once
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uri := fmt.Sprintf("https://api.corrently.io/v2.0/gsi/prediction?zip=%s", t.zip)
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for tick := time.Tick(time.Hour); ; <-tick {
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var res corrently.Forecast
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err := backoff.Retry(func() error {
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return backoffPermanentError(t.GetJSON(uri, &res))
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}, bo())
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if err == nil && res.Err {
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if s, ok := res.Message.(string); ok {
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err = errors.New(s)
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} else {
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err = api.ErrNotAvailable
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}
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}
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var data api.Rates
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if err == nil {
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if data = gsiRates(res); len(data) == 0 {
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err = api.ErrNotAvailable
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}
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}
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if err != nil {
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if reportError(&once, done, err) {
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return
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}
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t.log.ERROR.Println(err)
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continue
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}
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mergeRates(t.data, data)
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once.Do(func() { close(done) })
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}
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}
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// gsiRates maps the forecast to rates. co2_g_standard is null since mid-2026,
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// fall back to co2_g_oekostrom and skip slots without either value.
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func gsiRates(res corrently.Forecast) api.Rates {
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data := make(api.Rates, 0, len(res.Forecast))
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for _, r := range res.Forecast {
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co2 := r.Co2GStandard
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if co2 == nil {
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co2 = r.Co2GOekostrom
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}
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if co2 == nil {
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continue
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}
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data = append(data, api.Rate{
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Start: time.UnixMilli(r.Timeframe.Start).Local(),
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End: time.UnixMilli(r.Timeframe.End).Local(),
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Value: float64(*co2),
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})
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}
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return data
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}
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// Rates implements the api.Tariff interface
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func (t *GrünStromIndex) 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 *GrünStromIndex) Type() api.TariffType {
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return api.TariffTypeCo2
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}
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