add some string processors

internal/processing/string-encode.go

@@ -0,0 +1,35 @@
+package processing
+
+import (
+	"context"
+	"fmt"
+)
+
+type StringEncode struct {
+	config ProcessorConfig
+}
+
+func (se *StringEncode) Process(ctx context.Context, payload any) (any, error) {
+	payloadString, ok := payload.(string)
+
+	if !ok {
+		return nil, fmt.Errorf("string.encode processor only accepts a string")
+	}
+
+	payloadBytes := []byte(payloadString)
+
+	return payloadBytes, nil
+}
+
+func (se *StringEncode) Type() string {
+	return se.config.Type
+}
+
+func init() {
+	RegisterProcessor(ProcessorRegistration{
+		Type: "string.encode",
+		New: func(config ProcessorConfig) (Processor, error) {
+			return &StringEncode{config: config}, nil
+		},
+	})
+}