116 lines
2.2 KiB
Go
116 lines
2.2 KiB
Go
package tariff
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import (
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"errors"
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"fmt"
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"net/url"
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"slices"
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"strings"
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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/elering"
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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 Elering struct {
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*embed
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mux sync.Mutex
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log *util.Logger
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region string
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data api.Rates
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updated time.Time
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}
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var _ api.Tariff = (*Elering)(nil)
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func init() {
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registry.Add("elering", NewEleringFromConfig)
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}
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func NewEleringFromConfig(other map[string]interface{}) (api.Tariff, error) {
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var cc struct {
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embed `mapstructure:",squash"`
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Region 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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t := &Elering{
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embed: &cc.embed,
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log: util.NewLogger("Elering"),
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region: strings.ToLower(cc.Region),
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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 *Elering) 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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for ; true; <-time.Tick(time.Hour) {
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var res elering.NpsPrice
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ts := time.Now().Truncate(time.Hour)
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uri := fmt.Sprintf("%s/nps/price?start=%s&end=%s", elering.URI,
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url.QueryEscape(ts.Format(time.RFC3339)),
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url.QueryEscape(ts.Add(48*time.Hour).Format(time.RFC3339)))
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if err := backoff.Retry(func() error {
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return client.GetJSON(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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once.Do(func() { close(done) })
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t.mux.Lock()
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t.updated = time.Now()
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data := res.Data[t.region]
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t.data = make(api.Rates, 0, len(data))
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for _, r := range data {
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ts := time.Unix(r.Timestamp, 0)
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ar := api.Rate{
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Start: ts.Local(),
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End: ts.Add(time.Hour).Local(),
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Price: t.totalPrice(r.Price / 1e3),
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}
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t.data = append(t.data, ar)
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}
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t.mux.Unlock()
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}
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}
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// Rates implements the api.Tariff interface
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func (t *Elering) Rates() (api.Rates, error) {
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t.mux.Lock()
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defer t.mux.Unlock()
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return slices.Clone(t.data), outdatedError(t.updated, time.Hour)
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}
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// Type implements the api.Tariff interface
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func (t *Elering) Type() api.TariffType {
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return api.TariffTypePriceDynamic
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}
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