Handle complex structs in metadata

CHANGELOG.md

@@ -7,6 +7,10 @@
 * Start showing inlined functions in stack trace
   [#208](https://github.com/bugsnag/bugsnag-go/pull/208)
 
+* Handle complex structs in metadata
+  [#215](https://github.com/bugsnag/bugsnag-go/pull/215)
+  [Chris Duncan](https://github.com/veqryn)
+
 ## 2.2.0 (2022-10-12)
 
 ### Enhancements

v2/metadata.go

@@ -1,9 +1,11 @@
 package bugsnag
 
 import (
+	"encoding"
 	"fmt"
 	"reflect"
 	"strings"
+	"time"
 )
 
 // MetaData is added to the Bugsnag dashboard in tabs. Each tab is
@@ -65,7 +67,7 @@ func (meta MetaData) sanitize(filters []string) interface{} {
 
 }
 
-// The sanitizer is used to remove filtered params and recursion from meta-data.
+// sanitizer is used to remove filtered params and recursion from meta-data.
 type sanitizer struct {
 	Filters []string
 	Seen    []interface{}
@@ -83,6 +85,24 @@ func (s sanitizer) Sanitize(data interface{}) interface{} {
 	// s.Seen for nested calls.
 	s.Seen = append(s.Seen, data)
 
+	// Handle certain well known interfaces and types
+	switch data := data.(type) {
+	case error:
+		return data.Error()
+
+	case time.Time:
+		return data.Format(time.RFC3339Nano)
+
+	case fmt.Stringer:
+		// This also covers time.Duration
+		return data.String()
+
+	case encoding.TextMarshaler:
+		if b, err := data.MarshalText(); err == nil {
+			return string(b)
+		}
+	}
+
 	t := reflect.TypeOf(data)
 	v := reflect.ValueOf(data)
 
@@ -123,9 +143,7 @@ func (s sanitizer) Sanitize(data interface{}) interface{} {
 		// case t.Chan, t.Func, reflect.Complex64, reflect.Complex128, reflect.UnsafePointer:
 	default:
 		return "[" + t.String() + "]"
-
 	}
-
 }
 
 func (s sanitizer) sanitizeMap(v reflect.Value) interface{} {
@@ -175,7 +193,6 @@ func (s sanitizer) sanitizeStruct(v reflect.Value, t reflect.Type) interface{} {
 			} else {
 				ret[name] = sanitized
 			}
-
 		}
 	}
 

v2/metadata_test.go

@@ -1,8 +1,10 @@
 package bugsnag
 
 import (
+	stderrors "errors"
 	"reflect"
 	"testing"
+	"time"
 	"unsafe"
 
 	"github.com/bugsnag/bugsnag-go/v2/errors"
@@ -26,6 +28,12 @@ type _broken struct {
 	Data string
 }
 
+type _textMarshaller struct{}
+
+func (_textMarshaller) MarshalText() ([]byte, error) {
+	return []byte("marshalled text"), nil
+}
+
 var account = _account{}
 var notifier = New(Configuration{})
 
@@ -123,6 +131,10 @@ func TestMetaDataSanitize(t *testing.T) {
 			"unsafe":   unsafe.Pointer(broken.Me),
 			"string":   "string",
 			"password": "secret",
+			"error":    stderrors.New("some error"),
+			"time":     time.Date(2023, 12, 5, 23, 59, 59, 123456789, time.UTC),
+			"duration": 105567462 * time.Millisecond,
+			"text":     _textMarshaller{},
 			"array": []hash{{
 				"creditcard": "1234567812345678",
 				"broken":     broken,
@@ -144,6 +156,10 @@ func TestMetaDataSanitize(t *testing.T) {
 			"unsafe":   "[unsafe.Pointer]",
 			"func":     "[func()]",
 			"password": "[FILTERED]",
+			"error":    "some error",
+			"time":     "2023-12-05T23:59:59.123456789Z",
+			"duration": "29h19m27.462s",
+			"text":     "marshalled text",
 			"array": []interface{}{map[string]interface{}{
 				"creditcard": "[FILTERED]",
 				"broken": map[string]interface{}{