Refactor: Error types

Signed-off-by: nyagamunene <stevenyaga2014@gmail.com>

Author: nyagamunene

bootstrap/service.go

@@ -17,36 +17,215 @@ import (
 	mgsdk "github.com/absmach/magistrala/pkg/sdk/go"
 )
 
-var (
-	// ErrThings indicates failure to communicate with Magistrala Things service.
-	// It can be due to networking error or invalid/unauthenticated request.
-	ErrThings = errors.New("failed to receive response from Things service")
-
-	// ErrExternalKey indicates a non-existent bootstrap configuration for given external key.
-	ErrExternalKey = errors.New("failed to get bootstrap configuration for given external key")
-
-	// ErrExternalKeySecure indicates error in getting bootstrap configuration for given encrypted external key.
-	ErrExternalKeySecure = errors.New("failed to get bootstrap configuration for given encrypted external key")
-
-	// ErrBootstrap indicates error in getting bootstrap configuration.
-	ErrBootstrap = errors.New("failed to read bootstrap configuration")
-
-	// ErrAddBootstrap indicates error in adding bootstrap configuration.
-	ErrAddBootstrap = errors.New("failed to add bootstrap configuration")
-
-	errUpdateConnections  = errors.New("failed to update connections")
-	errRemoveBootstrap    = errors.New("failed to remove bootstrap configuration")
-	errChangeState        = errors.New("failed to change state of bootstrap configuration")
-	errUpdateChannel      = errors.New("failed to update channel")
-	errRemoveConfig       = errors.New("failed to remove bootstrap configuration")
-	errRemoveChannel      = errors.New("failed to remove channel")
-	errCreateThing        = errors.New("failed to create thing")
-	errDisconnectThing    = errors.New("failed to disconnect thing")
-	errCheckChannels      = errors.New("failed to check if channels exists")
-	errConnectionChannels = errors.New("failed to check channels connections")
-	errThingNotFound      = errors.New("failed to find thing")
-	errUpdateCert         = errors.New("failed to update cert")
-)
+// ErrThings indicates failure to communicate with Magistrala Things service.
+// It can be due to networking error or invalid/unauthenticated request.
+type ThingsError struct {
+	Err errors.Error
+}
+
+func (te *ThingsError) Error() string {
+	return te.Err.Error()
+}
+
+var ErrThings = &ThingsError{
+	Err: errors.New("failed to receive response from Things service"),
+}
+
+// ErrExternalKey indicates a non-existent bootstrap configuration for given external key.
+type ExternalKeyError struct {
+	Err errors.Error
+}
+
+func (eke *ExternalKeyError) Error() string {
+	return eke.Err.Error()
+}
+
+var ErrExternalKey = &ExternalKeyError{
+	Err: errors.New("failed to get bootstrap configuration for given external key"),
+}
+
+// ErrExternalKeySecure indicates error in getting bootstrap configuration for given encrypted external key.
+type ExternalKeySecureError struct {
+	Err errors.Error
+}
+
+func (ekse *ExternalKeySecureError) Error() string {
+	return ekse.Err.Error()
+}
+
+var ErrExternalKeySecure = &ExternalKeySecureError{
+	Err: errors.New("failed to get bootstrap configuration for given encrypted external key"),
+}
+
+// ErrBootstrap indicates error in getting bootstrap configuration.
+type BootstrapError struct {
+	Err errors.Error
+}
+
+func (be *BootstrapError) Error() string {
+	return be.Err.Error()
+}
+
+var ErrBootstrap = &BootstrapError{
+	Err: errors.New("failed to read bootstrap configuration"),
+}
+
+// ErrAddBootstrap indicates error in adding bootstrap configuration.
+type AddBootstrapError struct {
+	Err errors.Error
+}
+
+func (abe *AddBootstrapError) Error() string {
+	return abe.Err.Error()
+}
+
+var ErrAddBootstrap = &AddBootstrapError{
+	Err: errors.New("failed to add bootstrap configuration"),
+}
+
+type UpdateConnectionsError struct {
+	Err errors.Error
+}
+
+func (uce *UpdateConnectionsError) Error() string {
+	return uce.Err.Error()
+}
+
+var errUpdateConnections = &UpdateConnectionsError{
+	Err: errors.New("failed to update connections"),
+}
+
+type RemoveBootstrapError struct {
+	Err errors.Error
+}
+
+func (rbe *RemoveBootstrapError) Error() string {
+	return rbe.Err.Error()
+}
+
+var errRemoveBootstrap = &RemoveBootstrapError{
+	Err: errors.New("failed to remove bootstrap configuration"),
+}
+
+type ChangeStateError struct {
+	Err errors.Error
+}
+
+func (cse *ChangeStateError) Error() string {
+	return cse.Err.Error()
+}
+
+var errChangeState = &ChangeStateError{
+	Err: errors.New("failed to change state of bootstrap configuration"),
+}
+
+type UpdateChannelError struct {
+	Err errors.Error
+}
+
+func (uce *UpdateChannelError) Error() string {
+	return uce.Err.Error()
+}
+
+var errUpdateChannel = &UpdateChannelError{
+	Err: errors.New("failed to update channel"),
+}
+
+type RemoveConfigError struct {
+	Err errors.Error
+}
+
+func (rce *RemoveConfigError) Error() string {
+	return rce.Err.Error()
+}
+
+var errRemoveConfig = &RemoveConfigError{
+	Err: errors.New("failed to remove bootstrap configuration"),
+}
+
+type RemoveChannelError struct {
+	Err errors.Error
+}
+
+func (rce *RemoveChannelError) Error() string {
+	return rce.Err.Error()
+}
+
+var errRemoveChannel = &RemoveChannelError{
+	Err: errors.New("failed to remove channel"),
+}
+
+type CreateThingError struct {
+	Err errors.Error
+}
+
+func (cte *CreateThingError) Error() string {
+	return cte.Err.Error()
+}
+
+var errCreateThing = &CreateThingError{
+	Err: errors.New("failed to create thing"),
+}
+
+type DisconnectThingError struct {
+	Err errors.Error
+}
+
+func (dte *DisconnectThingError) Error() string {
+	return dte.Err.Error()
+}
+
+var errDisconnectThing = &DisconnectThingError{
+	Err: errors.New("failed to disconnect thing"),
+}
+
+type CheckChannelsError struct {
+	Err errors.Error
+}
+
+func (cce *CheckChannelsError) Error() string {
+	return cce.Err.Error()
+}
+
+var errCheckChannels = &CheckChannelsError{
+	Err: errors.New("failed to check if channels exists"),
+}
+
+type ConnectionChannelsError struct {
+	Err errors.Error
+}
+
+func (cce *ConnectionChannelsError) Error() string {
+	return cce.Err.Error()
+}
+
+var errConnectionChannels = &ConnectionChannelsError{
+	Err: errors.New("failed to check channels connections"),
+}
+
+type ThingNotFoundError struct {
+	Err errors.Error
+}
+
+func (tnfe *ThingNotFoundError) Error() string {
+	return tnfe.Err.Error()
+}
+
+var errThingNotFound = &ThingNotFoundError{
+	Err: errors.New("failed to find thing"),
+}
+
+type UpdateCertError struct {
+	Err errors.Error
+}
+
+func (uce *UpdateCertError) Error() string {
+	return uce.Err.Error()
+}
+
+var errUpdateCert = &UpdateCertError{
+	Err: errors.New("failed to update cert"),
+}
 
 var _ Service = (*bootstrapService)(nil)
 

internal/api/common.go

@@ -105,76 +105,71 @@ func EncodeError(_ context.Context, err error, w http.ResponseWriter) {
 	}
 
 	w.Header().Set("Content-Type", ContentType)
-	switch {
-	case errors.Contains(err, svcerr.ErrAuthorization),
-		errors.Contains(err, svcerr.ErrDomainAuthorization),
-		errors.Contains(err, bootstrap.ErrExternalKey),
-		errors.Contains(err, bootstrap.ErrExternalKeySecure):
+	switch err.(type) {
+	case *svcerr.AuthorizationError, *svcerr.DomainAuthorizationError, *bootstrap.ExternalKeyError, *bootstrap.ExternalKeySecureError:
 		err = unwrap(err)
 		w.WriteHeader(http.StatusForbidden)
 
-	case errors.Contains(err, svcerr.ErrAuthentication),
-		errors.Contains(err, apiutil.ErrBearerToken),
-		errors.Contains(err, svcerr.ErrLogin):
+	case *svcerr.AuthenticationError, *apiutil.BearerTokenError, *svcerr.LoginError:
 		err = unwrap(err)
 		w.WriteHeader(http.StatusUnauthorized)
-	case errors.Contains(err, svcerr.ErrMalformedEntity),
-		errors.Contains(err, apiutil.ErrMalformedPolicy),
-		errors.Contains(err, apiutil.ErrMissingSecret),
-		errors.Contains(err, errors.ErrMalformedEntity),
-		errors.Contains(err, apiutil.ErrMissingID),
-		errors.Contains(err, apiutil.ErrMissingName),
-		errors.Contains(err, apiutil.ErrMissingEmail),
-		errors.Contains(err, apiutil.ErrMissingHost),
-		errors.Contains(err, apiutil.ErrInvalidResetPass),
-		errors.Contains(err, apiutil.ErrEmptyList),
-		errors.Contains(err, apiutil.ErrMissingMemberKind),
-		errors.Contains(err, apiutil.ErrMissingMemberType),
-		errors.Contains(err, apiutil.ErrLimitSize),
-		errors.Contains(err, apiutil.ErrBearerKey),
-		errors.Contains(err, svcerr.ErrInvalidStatus),
-		errors.Contains(err, apiutil.ErrNameSize),
-		errors.Contains(err, apiutil.ErrInvalidIDFormat),
-		errors.Contains(err, apiutil.ErrInvalidQueryParams),
-		errors.Contains(err, apiutil.ErrMissingRelation),
-		errors.Contains(err, apiutil.ErrValidation),
-		errors.Contains(err, apiutil.ErrMissingIdentity),
-		errors.Contains(err, apiutil.ErrMissingPass),
-		errors.Contains(err, apiutil.ErrMissingConfPass),
-		errors.Contains(err, apiutil.ErrPasswordFormat),
-		errors.Contains(err, svcerr.ErrInvalidRole),
-		errors.Contains(err, svcerr.ErrInvalidPolicy),
-		errors.Contains(err, apiutil.ErrInvitationState),
-		errors.Contains(err, apiutil.ErrInvalidAPIKey),
-		errors.Contains(err, svcerr.ErrViewEntity),
-		errors.Contains(err, apiutil.ErrBootstrapState),
-		errors.Contains(err, apiutil.ErrMissingCertData),
-		errors.Contains(err, apiutil.ErrInvalidContact),
-		errors.Contains(err, apiutil.ErrInvalidTopic),
-		errors.Contains(err, bootstrap.ErrAddBootstrap),
-		errors.Contains(err, apiutil.ErrInvalidCertData),
-		errors.Contains(err, apiutil.ErrEmptyMessage):
+	case *svcerr.MalformedEntityError,
+		*apiutil.MalformedPolicyError,
+		*apiutil.MissingSecretError,
+		*errors.MalformedEntityError,
+		*apiutil.MissingIDError,
+		*apiutil.MissingNameError,
+		*apiutil.MissingEmailError,
+		*apiutil.MissingHostError,
+		*apiutil.InvalidResetPassError,
+		*apiutil.EmptyListError,
+		*apiutil.MissingMemberKindError,
+		*apiutil.MissingMemberTypeError,
+		*apiutil.LimitSizeError,
+		*apiutil.BearerKeyError,
+		*svcerr.InvalidStatusError,
+		*apiutil.NameSizeError,
+		*apiutil.InvalidIDFormatError,
+		*apiutil.InvalidQueryParamsError,
+		*apiutil.MissingRelationError,
+		*apiutil.ValidationError,
+		*apiutil.MissingIdentityError,
+		*apiutil.MissingPassError,
+		*apiutil.MissingConfPassError,
+		*apiutil.PasswordFormatError,
+		*svcerr.InvalidRoleError,
+		*svcerr.InvalidPolicyError,
+		*apiutil.InvitationStateError,
+		*apiutil.InvalidAPIKeyError,
+		*svcerr.ViewEntityError,
+		*apiutil.BootstrapStateError,
+		*apiutil.MissingCertDataError,
+		*apiutil.InvalidContactError,
+		*apiutil.InvalidTopicError,
+		*bootstrap.AddBootstrapError,
+		*apiutil.InvalidCertDataError,
+		*apiutil.EmptyMessageError:
 		err = unwrap(err)
 		w.WriteHeader(http.StatusBadRequest)
 
-	case errors.Contains(err, svcerr.ErrCreateEntity),
-		errors.Contains(err, svcerr.ErrUpdateEntity),
-		errors.Contains(err, svcerr.ErrRemoveEntity),
-		errors.Contains(err, svcerr.ErrEnableClient):
+	case *svcerr.CreateEntityError,
+		*svcerr.UpdateEntityError,
+		*svcerr.RemoveEntityError,
+		*svcerr.EnableClientError:
 		err = unwrap(err)
 		w.WriteHeader(http.StatusUnprocessableEntity)
 
-	case errors.Contains(err, svcerr.ErrNotFound),
-		errors.Contains(err, bootstrap.ErrBootstrap):
+	case *svcerr.NotFoundError,
+		*bootstrap.BootstrapError:
 		err = unwrap(err)
 		w.WriteHeader(http.StatusNotFound)
 
-	case errors.Contains(err, errors.ErrStatusAlreadyAssigned),
-		errors.Contains(err, svcerr.ErrConflict):
+	case *errors.StatusAlreadyAssignedError,
+		*svcerr.ConflictError:
 		err = unwrap(err)
 		w.WriteHeader(http.StatusConflict)
 
-	case errors.Contains(err, apiutil.ErrUnsupportedContentType):
+	case *apiutil.UnsupportedContentTypeError:
 		err = unwrap(err)
 		w.WriteHeader(http.StatusUnsupportedMediaType)