Initial commit

error.go

@@ -0,0 +1,63 @@
+package i18n
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/pkg/errors"
+)
+
+type TranslatableError interface {
+	error
+	Translatable
+}
+
+func TryTranslateError(ctx context.Context, err error) (string, bool) {
+	var translatable TranslatableError
+
+	if errors.As(err, &translatable) {
+		return translatable.Translate(ctx), true
+	}
+
+	return "", false
+}
+
+func NewError(key string) *Error {
+	return &Error{key: key}
+}
+
+type Error struct {
+	key    string
+	params []interface{}
+}
+
+func (e *Error) Error() string {
+	return e.key
+}
+
+func (e *Error) WithParams(params ...interface{}) *Error {
+	newErr := *e
+
+	newErr.params = params
+
+	return &newErr
+}
+
+func (e *Error) Translate(ctx context.Context) string {
+	printer := PrinterFromContext(ctx)
+
+	translatedParams := make([]interface{}, len(e.params))
+
+	for idx, param := range e.params {
+		switch typed := param.(type) {
+		case string:
+			translatedParams[idx] = printer.Sprintf(typed)
+		case fmt.Stringer:
+			translatedParams[idx] = printer.Sprintf(typed.String())
+		default:
+			translatedParams[idx] = param
+		}
+	}
+
+	return printer.Sprintf(e.key, translatedParams...)
+}