88 lines
1.8 KiB
Go
88 lines
1.8 KiB
Go
package plugin
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import (
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"context"
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"errors"
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"fmt"
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"github.com/evcc-io/evcc/util"
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)
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func init() {
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registry.AddCtx("valid", NewValidFromConfig)
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}
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// validPlugin validates a reading via a second reading
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type validPlugin struct {
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ctx context.Context
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valid func() (bool, error)
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value Config
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}
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// NewValidFromConfig creates valid provider
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func NewValidFromConfig(ctx context.Context, other map[string]any) (Plugin, error) {
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var cc struct {
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Valid, Value Config
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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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valid, err := cc.Valid.BoolGetter(ctx)
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if err != nil {
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return nil, fmt.Errorf("valid: %w", err)
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}
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o := NewValidPlugin(ctx, valid, cc.Value)
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return o, nil
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}
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// NewValidPlugin creates valid provider
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func NewValidPlugin(ctx context.Context, valid func() (bool, error), value Config) *validPlugin {
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return &validPlugin{
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ctx: ctx,
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valid: valid,
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value: value,
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}
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}
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func (o *validPlugin) validGetter[T any](valuer func(ctx context.Context) (func() (T, error), error)) (func() (T, error), error) {
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value, err := valuer(o.ctx)
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if err != nil {
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return nil, fmt.Errorf("valid: %w", err)
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}
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return func() (T, error) {
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var zero T
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valid, err := o.valid()
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if err != nil {
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return zero, err
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}
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if !valid {
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return zero, errors.New("invalid")
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}
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return value()
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}, nil
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}
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var _ StringGetter = (*validPlugin)(nil)
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func (o *validPlugin) StringGetter() (func() (string, error), error) {
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return o.validGetter(o.value.StringGetter)
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}
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var _ FloatGetter = (*validPlugin)(nil)
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func (o *validPlugin) FloatGetter() (func() (float64, error), error) {
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return o.validGetter(o.value.FloatGetter)
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}
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var _ IntGetter = (*validPlugin)(nil)
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func (o *validPlugin) IntGetter() (func() (int64, error), error) {
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return o.validGetter(o.value.IntGetter)
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}
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