src to pkg, impl lobby.Closed

pkg/lib/event/serialize.go

@@ -0,0 +1,34 @@
+package event
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+func Serialize(t string, v any) ([]byte, error) {
+	var wrapper struct {
+		Type    string `json:"type"`
+		Payload any    `json:"payload"`
+	}
+	wrapper.Type = t
+	wrapper.Payload = v
+	return json.Marshal(wrapper)
+}
+
+func Parse(b []byte, typesToPointers map[string]any) (string, error) {
+	var wrapper struct {
+		Type    string          `json:"type"`
+		Payload json.RawMessage `json:"payload"`
+	}
+	if err := json.Unmarshal(b, &wrapper); err != nil {
+		return "", err
+	}
+
+	if ptr, ok := typesToPointers[wrapper.Type]; !ok {
+		return "", fmt.Errorf("cannot parse unknown type %s", wrapper.Type)
+	} else if err := json.Unmarshal(wrapper.Payload, ptr); err != nil {
+		return "", fmt.Errorf("failed parsing type %s: %w", wrapper.Type, err)
+	}
+
+	return wrapper.Type, nil
+}