/
error_handling.go
110 lines (92 loc) · 2.79 KB
/
error_handling.go
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package errorhandling
import (
"context"
"database/sql"
goErrors "errors"
"runtime"
"github.com/99designs/gqlgen/graphql"
"github.com/neighborly/go-errors"
"github.com/nrfta/go-log"
"github.com/vektah/gqlparser/v2/gqlerror"
)
var (
errorCodeMappings = map[errors.ErrorCode]string{
errors.InternalError: "INTERNAL_ERROR",
errors.NotFound: "NOT_FOUND",
errors.InvalidArgument: "INVALID_ARGUMENT",
errors.Unauthenticated: "UNAUTHENTICATED",
errors.PermissionDenied: "PERMISSION_DENIED",
errors.Unknown: "UNKNOWN",
}
)
type ErrorReporterFunc func(ctx context.Context, err error)
func ConfigureErrorPresenterFunc(reporterFunc ErrorReporterFunc) graphql.ErrorPresenterFunc {
return func(ctx context.Context, e error) *gqlerror.Error {
if _, ok := e.(*runtime.TypeAssertionError); ok {
return graphql.DefaultErrorPresenter(ctx, e)
}
err := graphql.DefaultErrorPresenter(ctx, e)
var customError error
var gqlerr *gqlerror.Error
if goErrors.As(e, &gqlerr) {
customError = createCustomError(gqlerr.Unwrap())
} else {
customError = createCustomError(err)
}
if customError == nil {
return err
}
reportAndLogError(reporterFunc, ctx, customError)
err.Message = errors.DisplayMessage(customError)
err.Extensions = map[string]interface{}{
"code": transformToGraphqlErrorCode(errors.Code(customError)),
}
return err
}
}
// ConfigureRecoverFunc will better handle panic errors and recover from it
func ConfigureRecoverFunc() graphql.RecoverFunc {
return func(_ context.Context, errInterface interface{}) error {
var err error
switch e := errInterface.(type) {
case error:
err = e
default:
// skip the panic handler stack frames until the actual panic
err = errors.Newf("%+v", e)
}
return err
}
}
func transformToGraphqlErrorCode(code errors.ErrorCode) string {
if mapping, ok := errorCodeMappings[code]; ok {
return mapping
}
return string(code)
}
// reportAndLogError prints errors if the error is an internal error
func reportAndLogError(reportError ErrorReporterFunc, ctx context.Context, err error) {
if errors.Code(err) == errors.InternalError {
reportError(ctx, err)
stack := errors.StackTrace(err)
// only log errors that we don't control
log.RequestLogger(ctx).Errorf("%s: %+v%+v", errors.InternalError, err.Error(), stack)
}
}
// createCustomError: wrap error into custom error if not one already, otherwise return it.
func createCustomError(err error) error {
if err == sql.ErrNoRows {
return errors.WithDisplayMessage(
errors.NotFound.Wrap(err, "record not found"),
"Record Not Found",
)
}
if errors.Code(err) != errors.InternalError {
return err
}
// Handles gqlgen entity resolver wrapping the original error
if unwrapped := goErrors.Unwrap(err); unwrapped != nil {
return unwrapped
}
return err
}