🔊 Add WithLogger so we can log the rendered error

middleware.go

@@ -48,6 +48,12 @@ func ErrorMiddleware(opts ...Option) gin.HandlerFunc {
 			re = rErrors.NewInternalError("%w", err)
 		}
 
+		for _, logger := range conf.loggers {
+			logger(c, re)
+		}
+
+		c.Set("rendered_error", re)
+
 		c.JSON(re.Status(), re)
 	}
 }

middleware_test.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"net/http"
 	"net/http/httptest"
+	"strings"
 	"testing"
 
 	rErrors "codeberg.org/danjones000/responsable-errors"
@@ -117,3 +118,15 @@ func (s *MiddlewareTestSuite) TestNoWorkingTransformer() {
 	s.Assert().Equal("Unknown Error", outMsg)
 	s.Assert().Equal(http.StatusInternalServerError, s.w.Code)
 }
+
+func (s *MiddlewareTestSuite) TestLogger() {
+	buff := strings.Builder{}
+	var l LoggerFunc = func(c *gin.Context, err rErrors.ResponsableError) {
+		buff.WriteString("Err: " + err.Error())
+	}
+	err := errors.New("Foo")
+	s.ctx.Error(err)
+	ErrorMiddleware(WithLogger(l))(s.ctx)
+
+	s.Assert().Equal("Err: Foo", buff.String())
+}

options.go

@@ -8,13 +8,23 @@ import (
 )
 
 type config struct {
+	loggers      []LoggerFunc
 	transformers []Transformer
 }
 
+type LoggerFunc func(*gin.Context, rErrors.ResponsableError)
+
 type Transformer func(error) rErrors.ResponsableError
 
 type Option func(config) config
 
+func WithLogger(logger LoggerFunc) Option {
+	return func(c config) config {
+		c.loggers = append(c.loggers, logger)
+		return c
+	}
+}
+
 func WithTransformer(tr Transformer) Option {
 	return func(c config) config {
 		c.transformers = append(c.transformers, tr)