Merge pull request #32 from jwetzell/feat/json-encode

add processor to encode json bytes

internal/processor/json-encode.go

@@ -0,0 +1,42 @@
+package processor
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+
+	"github.com/jwetzell/showbridge-go/internal/config"
+)
+
+type JsonEncode struct {
+	config config.ProcessorConfig
+}
+
+func (je *JsonEncode) Process(ctx context.Context, payload any) (any, error) {
+	var payloadBuffer bytes.Buffer
+
+	err := json.NewEncoder(&payloadBuffer).Encode(payload)
+
+	if err != nil {
+		return nil, err
+	}
+
+	payloadBytes := payloadBuffer.Bytes()
+
+	payloadBytes = payloadBytes[0 : len(payloadBytes)-1]
+
+	return payloadBytes, nil
+}
+
+func (je *JsonEncode) Type() string {
+	return je.config.Type
+}
+
+func init() {
+	RegisterProcessor(ProcessorRegistration{
+		Type: "json.encode",
+		New: func(config config.ProcessorConfig) (Processor, error) {
+			return &JsonEncode{config: config}, nil
+		},
+	})
+}

internal/processor/json-encode_test.go

@@ -0,0 +1,45 @@
+package processor_test
+
+import (
+	"slices"
+	"testing"
+
+	"github.com/jwetzell/osc-go"
+	"github.com/jwetzell/showbridge-go/internal/processor"
+)
+
+func TestGoodJsonEncode(t *testing.T) {
+	stringEncoder := processor.JsonEncode{}
+	tests := []struct {
+		processor processor.Processor
+		name      string
+		payload   any
+		expected  []byte
+	}{
+		{
+			processor: &stringEncoder,
+			name:      "hello",
+			payload: osc.OSCMessage{
+				Address: "/hello",
+			},
+			expected: []byte("{\"address\":\"/hello\",\"args\":null}"),
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := test.processor.Process(t.Context(), test.payload)
+
+			gotBytes, ok := got.([]byte)
+			if !ok {
+				t.Fatalf("json.encode returned a %T payload: %s", got, got)
+			}
+			if err != nil {
+				t.Fatalf("json.encode failed: %s", err)
+			}
+			if !slices.Equal(gotBytes, test.expected) {
+				t.Fatalf("json.encode got %x, expected %s", got, test.expected)
+			}
+		})
+	}
+}