goext/exerr/exerr.go

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package exerr
import (
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"github.com/rs/xid"
"github.com/rs/zerolog"
"gogs.mikescher.com/BlackForestBytes/goext/langext"
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"reflect"
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"strings"
"time"
)
type ExErr struct {
UniqueID string `json:"uniqueID"`
Timestamp time.Time `json:"timestamp"`
Category ErrorCategory `json:"category"`
Severity ErrorSeverity `json:"severity"`
Type ErrorType `json:"type"`
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StatusCode *int `json:"statusCode"`
Message string `json:"message"`
WrappedErrType string `json:"wrappedErrType"`
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WrappedErr any `json:"-"`
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Caller string `json:"caller"`
OriginalError *ExErr `json:"originalError"`
Meta MetaMap `json:"meta"`
}
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func (ee *ExErr) Error() string {
return ee.RecursiveMessage()
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}
// Unwrap must be implemented so that some error.XXX methods work
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func (ee *ExErr) Unwrap() error {
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if ee.OriginalError == nil {
return nil // this is neccessary - otherwise we return a wrapped nil and the `x == nil` comparison fails (= panic in errors.Is and other failures)
}
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return ee.OriginalError
}
// Is must be implemented so that error.Is(x) works
func (ee *ExErr) Is(e error) bool {
return IsFrom(ee, e)
}
// As must be implemented so that error.As(x) works
//
//goland:noinspection GoTypeAssertionOnErrors
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func (ee *ExErr) As(target any) bool {
if dstErr, ok := target.(*ExErr); ok {
if dst0, ok := ee.contains(dstErr); ok {
dstErr = dst0
return true
} else {
return false
}
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} else {
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val := reflect.ValueOf(target)
typStr := val.Type().Elem().String()
for curr := ee; curr != nil; curr = curr.OriginalError {
if curr.Category == CatForeign && curr.WrappedErrType == typStr && curr.WrappedErr != nil {
val.Elem().Set(reflect.ValueOf(curr.WrappedErr))
return true
}
}
return false
}
}
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func (ee *ExErr) Log(evt *zerolog.Event) {
evt.Msg(ee.FormatLog(LogPrintFull))
}
func (ee *ExErr) FormatLog(lvl LogPrintLevel) string {
if lvl == LogPrintShort {
msg := ee.Message
if ee.OriginalError != nil && ee.OriginalError.Category == CatForeign {
msg = msg + " (" + strings.ReplaceAll(ee.OriginalError.Message, "\n", " ") + ")"
}
if ee.Type != TypeWrap {
return "[" + ee.Type.Key + "] " + msg
} else {
return msg
}
} else if lvl == LogPrintOverview {
str := "[" + ee.RecursiveType().Key + "] <" + ee.UniqueID + "> " + strings.ReplaceAll(ee.RecursiveMessage(), "\n", " ") + "\n"
indent := ""
for curr := ee; curr != nil; curr = curr.OriginalError {
indent += " "
str += indent
str += "-> "
strmsg := strings.Trim(curr.Message, " \r\n\t")
if lbidx := strings.Index(curr.Message, "\n"); lbidx >= 0 {
strmsg = strmsg[0:lbidx]
}
strmsg = langext.StrLimit(strmsg, 61, "...")
str += strmsg
str += "\n"
}
return str
} else if lvl == LogPrintFull {
str := "[" + ee.RecursiveType().Key + "] <" + ee.UniqueID + "> " + strings.ReplaceAll(ee.RecursiveMessage(), "\n", " ") + "\n"
indent := ""
for curr := ee; curr != nil; curr = curr.OriginalError {
indent += " "
etype := ee.Type.Key
if ee.Type == TypeWrap {
etype = "~"
}
str += indent
str += "-> ["
str += etype
if curr.Category == CatForeign {
str += "|Foreign"
}
str += "] "
str += strings.ReplaceAll(curr.Message, "\n", " ")
if curr.Caller != "" {
str += " (@ "
str += curr.Caller
str += ")"
}
str += "\n"
if curr.Meta.Any() {
meta := indent + " {" + curr.Meta.FormatOneLine(240) + "}"
if len(meta) < 200 {
str += meta
str += "\n"
} else {
str += curr.Meta.FormatMultiLine(indent+" ", " ", 1024)
str += "\n"
}
}
}
return str
} else {
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return "[?[" + ee.UniqueID + "]?]"
}
}
func (ee *ExErr) ShortLog(evt *zerolog.Event) {
ee.Meta.Apply(evt, langext.Ptr(240)).Msg(ee.FormatLog(LogPrintShort))
}
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// RecursiveMessage returns the message to show
// = first error (top-down) that is not wrapping/foreign/empty
// = lowest level error (that is not empty)
// = fallback to self.message
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func (ee *ExErr) RecursiveMessage() string {
// ==== [1] ==== first error (top-down) that is not wrapping/foreign/empty
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for curr := ee; curr != nil; curr = curr.OriginalError {
if curr.Message != "" && curr.Category != CatWrap && curr.Category != CatForeign {
return curr.Message
}
}
// ==== [2] ==== lowest level error (that is not empty)
deepestMsg := ""
for curr := ee; curr != nil; curr = curr.OriginalError {
if curr.Message != "" {
deepestMsg = curr.Message
}
}
if deepestMsg != "" {
return deepestMsg
}
// ==== [3] ==== fallback to self.message
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return ee.Message
}
// RecursiveType returns the statuscode to use
// = first error (top-down) that is not wrapping/empty
func (ee *ExErr) RecursiveType() ErrorType {
for curr := ee; curr != nil; curr = curr.OriginalError {
if curr.Type != TypeWrap {
return curr.Type
}
}
// fallback to self
return ee.Type
}
// RecursiveStatuscode returns the HTTP Statuscode to use
// = first error (top-down) that has a statuscode set
func (ee *ExErr) RecursiveStatuscode() *int {
for curr := ee; curr != nil; curr = curr.OriginalError {
if curr.StatusCode != nil {
return langext.Ptr(*curr.StatusCode)
}
}
return nil
}
// RecursiveCategory returns the ErrorCategory to use
// = first error (top-down) that has a statuscode set
func (ee *ExErr) RecursiveCategory() ErrorCategory {
for curr := ee; curr != nil; curr = curr.OriginalError {
if curr.Category != CatWrap {
return curr.Category
}
}
// fallback to <empty>
return ee.Category
}
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// RecursiveMeta searches (top-down) for teh first error that has a meta value with teh specified key
// and returns its value (or nil)
func (ee *ExErr) RecursiveMeta(key string) *MetaValue {
for curr := ee; curr != nil; curr = curr.OriginalError {
if metaval, ok := curr.Meta[key]; ok {
return langext.Ptr(metaval)
}
}
return nil
}
// Depth returns the depth of recursively contained errors
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func (ee *ExErr) Depth() int {
if ee.OriginalError == nil {
return 1
} else {
return ee.OriginalError.Depth() + 1
}
}
// contains test if the supplied error is contained in this error (anywhere in the chain)
func (ee *ExErr) contains(original *ExErr) (*ExErr, bool) {
if original == nil {
return nil, false
}
if ee == original {
return ee, true
}
for curr := ee; curr != nil; curr = curr.OriginalError {
if curr.equalsDirectProperties(curr) {
return curr, true
}
}
return nil, false
}
// equalsDirectProperties tests if ee and other are equals, but only looks at primary properties (not `OriginalError` or `Meta`)
func (ee *ExErr) equalsDirectProperties(other *ExErr) bool {
if ee.UniqueID != other.UniqueID {
return false
}
if ee.Timestamp != other.Timestamp {
return false
}
if ee.Category != other.Category {
return false
}
if ee.Severity != other.Severity {
return false
}
if ee.Type != other.Type {
return false
}
if ee.StatusCode != other.StatusCode {
return false
}
if ee.Message != other.Message {
return false
}
if ee.WrappedErrType != other.WrappedErrType {
return false
}
if ee.Caller != other.Caller {
return false
}
return true
}
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func newID() string {
return xid.New().String()
}