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
+		},
+	})
+}

internal/processor/json-decode_test.go

@@ -0,0 +1,51 @@
+package processor_test
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/showbridge-go/internal/processor"
+)
+
+func TestGoodJsonDecode(t *testing.T) {
+	jsonDecoder := processor.JsonDecode{}
+	tests := []struct {
+		name     string
+		payload  string
+		expected map[string]any
+	}{
+		{
+			name:    "basic json",
+			payload: "{\"address\":\"/hello\",\"args\":null}",
+			expected: map[string]any{
+				"address": "/hello",
+				"args":    nil,
+			},
+		},
+		{
+			name:    "array",
+			payload: "{\"address\":\"/hello\",\"args\":[1,2,3]}",
+			expected: map[string]any{
+				"address": "/hello",
+				"args":    []any{1.0, 2.0, 3.0},
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := jsonDecoder.Process(t.Context(), test.payload)
+
+			gotMap, ok := got.(map[string]any)
+			if !ok {
+				t.Fatalf("json.decode returned a %T payload: %s", got, got)
+			}
+			if err != nil {
+				t.Fatalf("json.decode failed: %s", err)
+			}
+			if !reflect.DeepEqual(gotMap, test.expected) {
+				t.Fatalf("json.decode got %x, expected %s", got, test.expected)
+			}
+		})
+	}
+}

schema/processors.schema.json

@@ -277,6 +277,17 @@
           }
         }
       },
+      {
+        "type": "object",
+        "properties": {
+          "type": {
+            "type": "string",
+            "const": "json.decode"
+          }
+        },
+        "required": ["type"],
+        "additionalProperties": false
+      },
       {
         "type": "object",
         "properties": {