Merge pull request #577 from MUzairS15/MUzairS15/utils

add helper functions for casting

utils/utils.go

@@ -452,3 +452,46 @@ func FindEntityType(content []byte) (entity.EntityType, error) {
 	}
 	return "", ErrInvalidSchemaVersion
 }
+
+// RecursiveCastMapStringInterfaceToMapStringInterface will convert a
+// map[string]interface{} recursively => map[string]interface{}
+func RecursiveCastMapStringInterfaceToMapStringInterface(in map[string]interface{}) map[string]interface{} {
+	res := ConvertMapInterfaceMapString(in)
+	out, ok := res.(map[string]interface{})
+	if !ok {
+		fmt.Println("failed to cast")
+	}
+
+	return out
+}
+
+// ConvertMapInterfaceMapString converts map[interface{}]interface{} => map[string]interface{}
+//
+// It will also convert []interface{} => []string
+func ConvertMapInterfaceMapString(v interface{}) interface{} {
+	switch x := v.(type) {
+	case map[interface{}]interface{}:
+		m := map[string]interface{}{}
+		for k, v2 := range x {
+			switch k2 := k.(type) {
+			case string:
+				m[k2] = ConvertMapInterfaceMapString(v2)
+			default:
+				m[fmt.Sprint(k)] = ConvertMapInterfaceMapString(v2)
+			}
+		}
+		v = m
+
+	case []interface{}:
+		for i, v2 := range x {
+			x[i] = ConvertMapInterfaceMapString(v2)
+		}
+
+	case map[string]interface{}:
+		for k, v2 := range x {
+			x[k] = ConvertMapInterfaceMapString(v2)
+		}
+	}
+
+	return v
+}