feat: copier util

copierutil/converters.go

@@ -41,3 +41,64 @@ var TimestamppbToTimeConverter = copier.TypeConverter{
 		return timeutil.TimestamppbToTime(src.(*timestamppb.Timestamp)), nil
 	},
 }
+
+func MakeTypeConverter(srcType, dstType interface{}, fn func(src interface{}) (interface{}, error)) copier.TypeConverter {
+	return copier.TypeConverter{
+		SrcType: srcType,
+		DstType: dstType,
+		Fn:      fn,
+	}
+}
+
+func MakeTypeConverterPair(srcType, dstType interface{}, fromFn, toFn func(src interface{}) (interface{}, error)) []copier.TypeConverter {
+	return []copier.TypeConverter{
+		{
+			SrcType: srcType,
+			DstType: dstType,
+			Fn:      fromFn,
+		},
+		{
+			SrcType: dstType,
+			DstType: srcType,
+			Fn:      toFn,
+		},
+	}
+}
+
+func MakeGenericTypeConverterPair[A interface{}, B interface{}](srcType A, dstType B, fromFn func(src A) B, toFn func(src B) A) []copier.TypeConverter {
+	return []copier.TypeConverter{
+		{
+			SrcType: srcType,
+			DstType: dstType,
+			Fn: func(src interface{}) (interface{}, error) {
+				return fromFn(src.(A)), nil
+			},
+		},
+		{
+			SrcType: dstType,
+			DstType: srcType,
+			Fn: func(src interface{}) (interface{}, error) {
+				return toFn(src.(B)), nil
+			},
+		},
+	}
+}
+
+func MakeErrorHandlingTypeConverterPair[A interface{}, B interface{}](srcType A, dstType B, fromFn func(src A) (B, error), toFn func(src B) (A, error)) []copier.TypeConverter {
+	return []copier.TypeConverter{
+		{
+			SrcType: srcType,
+			DstType: dstType,
+			Fn: func(src interface{}) (interface{}, error) {
+				return fromFn(src.(A))
+			},
+		},
+		{
+			SrcType: dstType,
+			DstType: srcType,
+			Fn: func(src interface{}) (interface{}, error) {
+				return toFn(src.(B))
+			},
+		},
+	}
+}