Convert errors to OC status

vendor/github.com/cpuguy83/strongerrors/status/ocstatus/status.go

@@ -0,0 +1,49 @@
+// Package ocstatus provides error status conversions to opencencus status trace.StatusCode
+package ocstatus
+
+import (
+	"github.com/cpuguy83/strongerrors"
+	"go.opencensus.io/trace"
+)
+
+// FromError makes an opencencus trace.Status from the passed in error.
+func FromError(err error) trace.Status {
+	if err == nil {
+		return trace.Status{Code: trace.StatusCodeOK}
+	}
+
+	switch {
+	case strongerrors.IsNotFound(err):
+		return status(trace.StatusCodeNotFound, err)
+	case strongerrors.IsConflict(err), strongerrors.IsNotModified(err):
+		return status(trace.StatusCodeFailedPrecondition, err)
+	case strongerrors.IsInvalidArgument(err):
+		return status(trace.StatusCodeInvalidArgument, err)
+	case strongerrors.IsAlreadyExists(err):
+		return status(trace.StatusCodeAlreadyExists, err)
+	case strongerrors.IsCancelled(err):
+		return status(trace.StatusCodeCancelled, err)
+	case strongerrors.IsDeadline(err):
+		return status(trace.StatusCodeDeadlineExceeded, err)
+	case strongerrors.IsUnauthorized(err):
+		return status(trace.StatusCodePermissionDenied, err)
+	case strongerrors.IsUnauthenticated(err):
+		return status(trace.StatusCodeUnauthenticated, err)
+	case strongerrors.IsForbidden(err), strongerrors.IsNotImplemented(err):
+		return status(trace.StatusCodeUnimplemented, err)
+	case strongerrors.IsExhausted(err):
+		return status(trace.StatusCodeResourceExhausted, err)
+	case strongerrors.IsDataLoss(err):
+		return status(trace.StatusCodeDataLoss, err)
+	case strongerrors.IsSystem(err):
+		return status(trace.StatusCodeInternal, err)
+	case strongerrors.IsUnavailable(err):
+		return status(trace.StatusCodeUnavailable, err)
+	default:
+		return status(trace.StatusCodeUnknown, err)
+	}
+}
+
+func status(code int32, err error) trace.Status {
+	return trace.Status{Code: code, Message: err.Error()}
+}