chore: add custom dimmer/curtailer (#29857)

meter/measurement/action.go

@@ -0,0 +1,86 @@
+package measurement
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/evcc-io/evcc/api/implement"
+	"github.com/evcc-io/evcc/plugin"
+)
+
+type Dimmer struct {
+	Dim    *plugin.Config // optional
+	Dimmed *plugin.Config // optional
+}
+
+func (cc *Dimmer) Configure(ctx context.Context) (
+	func(bool) error,
+	func() (bool, error),
+	error,
+) {
+	dimS, err := cc.Dim.BoolSetter(ctx, "dim")
+	if err != nil {
+		return nil, nil, fmt.Errorf("dim: %w", err)
+	}
+
+	dimmedG, err := cc.Dimmed.BoolGetter(ctx)
+	if err != nil {
+		return nil, nil, fmt.Errorf("dimmed: %w", err)
+	}
+
+	if (dimS == nil) != (dimmedG == nil) {
+		return nil, nil, errors.New("must have dim and dimmed or none of both")
+	}
+
+	return dimS, dimmedG, nil
+}
+
+func (cc *Dimmer) Implement(ctx context.Context, i implement.Caps) error {
+	dimS, dimmedG, err := cc.Configure(ctx)
+	if err != nil {
+		return err
+	}
+
+	implement.May(i, implement.Dimmer(dimS, dimmedG))
+
+	return nil
+}
+
+type Curtailer struct {
+	Curtail   *plugin.Config // optional
+	Curtailed *plugin.Config // optional
+}
+
+func (cc *Curtailer) Configure(ctx context.Context) (
+	func(bool) error,
+	func() (bool, error),
+	error,
+) {
+	curtailS, err := cc.Curtail.BoolSetter(ctx, "curtail")
+	if err != nil {
+		return nil, nil, fmt.Errorf("curtail: %w", err)
+	}
+
+	curtailedG, err := cc.Curtailed.BoolGetter(ctx)
+	if err != nil {
+		return nil, nil, fmt.Errorf("curtailed: %w", err)
+	}
+
+	if (curtailS == nil) != (curtailedG == nil) {
+		return nil, nil, errors.New("must have curtail and curtailed or none of both")
+	}
+
+	return curtailS, curtailedG, nil
+}
+
+func (cc *Curtailer) Implement(ctx context.Context, i implement.Caps) error {
+	curtailS, curtailedG, err := cc.Configure(ctx)
+	if err != nil {
+		return err
+	}
+
+	implement.May(i, implement.Curtailer(curtailS, curtailedG))
+
+	return nil
+}

meter/meter.go

@@ -18,8 +18,10 @@ func init() {
 // NewConfigurableFromConfig creates a new meter from config
 func NewConfigurableFromConfig(ctx context.Context, other map[string]any) (api.Meter, error) {
 	cc := struct {
-		measurement.Energy `mapstructure:",squash"` // energy optional
-		measurement.Phases `mapstructure:",squash"` // optional
+		measurement.Energy    `mapstructure:",squash"` // energy optional
+		measurement.Phases    `mapstructure:",squash"` // optional
+		measurement.Dimmer    `mapstructure:",squash"` // optional
+		measurement.Curtailer `mapstructure:",squash"` // optional
 
 		// pv
 		pvMaxACPower `mapstructure:",squash"`
@@ -95,6 +97,14 @@ func NewConfigurableFromConfig(ctx context.Context, other map[string]any) (api.M
 	implement.May(m, implement.PhasePowers(powersG))
 	implement.May(m, implement.MaxACPowerGetter(cc.pvMaxACPower.Decorator()))
 
+	// dim/curtail
+	if err := cc.Dimmer.Implement(ctx, m); err != nil {
+		return nil, err
+	}
+	if err := cc.Curtailer.Implement(ctx, m); err != nil {
+		return nil, err
+	}
+
 	return m, nil
 }