add json.decode processor

internal/processor/json-decode.go

@@ -0,0 +1,44 @@
+package processor
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+
+	"github.com/jwetzell/showbridge-go/internal/config"
+)
+
+type JsonDecode struct {
+	config config.ProcessorConfig
+}
+
+func (jd *JsonDecode) Process(ctx context.Context, payload any) (any, error) {
+	payloadString, ok := payload.(string)
+
+	if !ok {
+		return nil, errors.New("json.decode processor only accepts a string")
+	}
+
+	payloadJson := make(map[string]any)
+
+	err := json.Unmarshal([]byte(payloadString), &payloadJson)
+	if err != nil {
+		return nil, err
+	}
+
+	return payloadJson, nil
+
+}
+
+func (jd *JsonDecode) Type() string {
+	return jd.config.Type
+}
+
+func init() {
+	RegisterProcessor(ProcessorRegistration{
+		Type: "json.decode",
+		New: func(config config.ProcessorConfig) (Processor, error) {
+			return &JsonDecode{config: config}, nil
+		},
+	})
+}