fix: #6

change-handler.go

@@ -22,13 +22,13 @@ func (s *Settings[C]) OnChange(hook ChangeHook) *Settings[C] {
 }
 
 // HasOnChangeHook returns true if there are registered hooks.
-func (s *Settings[C]) HasOnChangeHook(hook ChangeHook) *Settings[C] {
+func (s *Settings[C]) HasOnChangeHook(hook ChangeHook) bool {
 	for _, h := range s.hooks.change {
 		if h == hook {
-			break
+			return true
 		}
 	}
-	return s
+	return false
 }
 
 // RemoveOnChangeHook removes a change hook from the list of hooks.

error-handler.go

@@ -18,13 +18,13 @@ func (s *Settings[C]) OnError(hook ErrorHook) *Settings[C] {
 }
 
 // HasOnErrorHook returns true if there are registered hooks.
-func (s *Settings[C]) HasOnErrorHook(hook ErrorHook) *Settings[C] {
+func (s *Settings[C]) HasOnErrorHook(hook ErrorHook) bool {
 	for _, h := range s.hooks.error {
 		if h == hook {
-			break
+			return true
 		}
 	}
-	return s
+	return false
 }
 
 // RemoveOnErrorHook removes a change hook from the list of hooks.
@@ -39,8 +39,23 @@ func (s *Settings[C]) RemoveOnErrorHook(hook ErrorHook) *Settings[C] {
 }
 
 func (s *Settings[C]) notifyErrorHooks() *Settings[C] {
+
+	if len(s.errors) == 0 {
+		return s
+	}
+
+	if len(s.hooks.error) == 0 {
+		return s
+	}
+
+	errors := make([]error, len(s.errors))
+	copy(errors, s.Errors())
+	s.ResetErrors()
+
 	for _, h := range s.hooks.error {
-		go h.Handle(ErrorEvent{})
+		go h.Handle(ErrorEvent{
+			Errors: errors,
+		})
 	}
 	return s
 }

error.go

@@ -8,14 +8,14 @@ import (
 	"reflect"
 )
 
-// ResetError is used to reset the error to nil
+// ResetErrors is used to reset the error to nil
 // After calling this function, the call HasErrors() will return false
 func (s *Settings[C]) ResetErrors() *Settings[C] {
 	s.errors = []error{}
 	return s
 }
 
-// Check if the setting contains errors
+// HasErrors checks if the setting contains errors
 func (s *Settings[C]) HasErrors() bool {
 	return len(s.errors) > 0
 }

postprocessing-handler.go

@@ -22,13 +22,13 @@ func (s *Settings[C]) OnPostprocessing(hook PostprocessingHook) *Settings[C] {
 }
 
 // HasOnPostprocessingHook returns true if there are registered hooks.
-func (s *Settings[C]) HasOnPostprocessingHook(hook PostprocessingHook) *Settings[C] {
+func (s *Settings[C]) HasOnPostprocessingHook(hook PostprocessingHook) bool {
 	for _, h := range s.hooks.postprocessing {
 		if h == hook {
-			break
+			return true
 		}
 	}
-	return s
+	return false
 }
 
 // RemoveOnPostprocessingHook removes a change hook from the list of hooks.