feat: Initial

errors/printer.go

@@ -0,0 +1,47 @@
+package errors
+
+import (
+	"io"
+	"strings"
+)
+
+func ErrorToString(e error) string {
+	builder := &strings.Builder{}
+	AppendError(builder, e, 0)
+	return builder.String()
+}
+
+func AppendError(writer io.StringWriter, err error, depth uint) {
+	padding := strings.Repeat(" ", int(depth))
+
+	var uniError UniverseError
+	if As(err, &uniError) {
+		errorType := uniError.Type()
+		if errorType != nil {
+			_, _ = writer.WriteString(errorType.Name)
+			_, _ = writer.WriteString(": ")
+		}
+
+		_, _ = writer.WriteString(uniError.Message())
+
+		stack := uniError.StackTrace()
+		if stack != nil {
+			for _, value := range stack {
+				_, _ = writer.WriteString("\n")
+				_, _ = writer.WriteString(padding)
+				_, _ = writer.WriteString(value)
+			}
+		}
+
+		cause := uniError.Cause()
+		if cause != nil {
+			_, _ = writer.WriteString("\n")
+			_, _ = writer.WriteString(padding)
+			_, _ = writer.WriteString("Caused by: ")
+			AppendError(writer, cause, depth+1)
+		}
+
+	} else {
+		_, _ = writer.WriteString(err.Error())
+	}
+}