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package dhelpers
import (
"runtime"
"fmt"
"math/rand"
"time"
"net"
"syscall"
"net/http"
"strings"
"github.com/bwmarrin/discordgo"
"github.com/davecgh/go-spew/spew"
"github.com/getsentry/raven-go"
"gitlab.com/Cacophony/dhelpers/bucket"
"gitlab.com/Cacophony/dhelpers/cache"
"gitlab.com/Cacophony/dhelpers/emoji"
"gitlab.com/Cacophony/dhelpers/state"
)
// ErrorHandlerType is the Error Handler Type used for the EventContainer
type ErrorHandlerType string
// defines ErrorHandler types
const (
SentryErrorHandler ErrorHandlerType = "sentry"
DiscordErrorHandler = "discord"
)
// defines ratelimiters for the ErrorHandlers
var (
sentryLimiter = bucket.NewBucket(5)
discordLimiter = bucket.NewKeyBucket(3)
)
// HandleErrWith handles an error with the given error handles
// event can be nil
// currently supported ErrorHandlerTypes: SentryErrorHandler, and DiscordErrorHandler
func HandleErrWith(service string, err error, event *EventContainer, errorHandlers ...ErrorHandlerType) {
var msg *discordgo.Message
if event != nil {
if event.MessageCreate != nil {
msg = event.MessageCreate.Message
}
if event.MessageUpdate != nil {
msg = event.MessageUpdate.Message
}
}
var dontLog bool
// don't log discord permission errors
if errD, ok := err.(*discordgo.RESTError); ok && errD.Message != nil {
if errD.Message.Code == discordgo.ErrCodeMissingPermissions ||
errD.Message.Code == discordgo.ErrCodeMissingAccess ||
errD.Message.Code == discordgo.ErrCodeCannotSendMessagesToThisUser {
dontLog = true
}
}
// don't log state errors
if err == state.ErrStateNotFound ||
err == state.ErrTargetWrongServer ||
err == state.ErrTargetWrongType {
dontLog = true
}
for _, errorHandlerType := range errorHandlers {
switch errorHandlerType {
case SentryErrorHandler:
if dontLog {
continue
}
if raven.ProjectID() == "" {
continue
}
if !sentryLimiter.Allow() {
continue
}
// send error to sentry
data := map[string]string{"service": service}
if msg != nil {
data["MessageID"] = msg.ID
data["AuthorID"] = msg.Author.ID
data["ChannelID"] = msg.ChannelID
data["Content"] = msg.Content
data["Timestamp"] = string(msg.Timestamp)
}
raven.CaptureError(fmt.Errorf(spew.Sdump(err)), data)
case DiscordErrorHandler:
if event == nil || msg == nil || cache.GetEDiscord(event.BotUserID) == nil {
continue
}
if !discordLimiter.Allow(msg.ChannelID) {
continue
}
// send message to discord, or add reaction if no message permission
channelPermissions, chErr := cache.GetEDiscord(event.BotUserID).UserChannelPermissions(event.BotUserID, msg.ChannelID)
if chErr == nil {
continue
}
if channelPermissions&discordgo.PermissionSendMessages == discordgo.PermissionSendMessages {
// send message if possible
errorMessage := err.Error()
if errD, ok := err.(*discordgo.RESTError); ok && errD.Message != nil {
errorMessage = errD.Message.Message
}
message := "**Something went wrong.** " + emoji.GetWithout("sad") + "\n```\nError: " + errorMessage + "\n```"
if !dontLog {
message += "I sent our top people to fix the issue as soon as possible. " + emoji.GetWithout("reach")
}
event.SendMessage( // nolint: errcheck
msg.ChannelID,
message,
)
} else if channelPermissions&discordgo.PermissionAddReactions == discordgo.PermissionAddReactions {
// try falling back to reaction if not possible
reactions := []string{
emoji.GetWithout("stop"),
emoji.GetWithout("weary"),
emoji.GetWithout("speaknoevil"),
emoji.GetWithout("notlikethis"),
emoji.GetWithout("cry"),
emoji.GetWithout("frown"),
emoji.GetWithout("unamused"),
}
rand.Seed(time.Now().Unix())
cache.GetEDiscord(event.BotUserID).MessageReactionAdd(msg.ChannelID, msg.ID, reactions[rand.Intn(len(reactions))]) // nolint: errcheck
}
}
}
if !dontLog && cache.GetLogger() != nil {
// log stacktrace
buf := make([]byte, 1<<16)
stackSize := runtime.Stack(buf, false)
cache.GetLogger().Errorln(err.Error() + "\n\n" + string(buf[0:stackSize]))
}
}
// RecoverLog can be recovered to, all errors will be logged
func RecoverLog() {
err := recover()
if err != nil {
// handle errors
LogError(err.(error))
}
}
// LogError sends an error to sentry and logs it, can be nil
func LogError(err error) {
if err == nil {
return
}
if cache.GetLogger() != nil {
// log stacktrace
buf := make([]byte, 1<<16)
stackSize := runtime.Stack(buf, false)
cache.GetLogger().Errorln(err.Error() + "\n\n" + string(buf[0:stackSize]))
}
if raven.ProjectID() != "" {
// send error to sentry
raven.CaptureError(fmt.Errorf(spew.Sdump(err)), nil)
}
}
// HandleJobErrorWith handles a Job error, if errorHandlers is nil it will be sent to sentry
// currently supported ErrorHandlerTypes: SentryErrorHandler
func HandleJobErrorWith(service, job string, err error, errorHandlers ...ErrorHandlerType) {
if errorHandlers == nil {
errorHandlers = []ErrorHandlerType{SentryErrorHandler}
}
for _, errorHandlerType := range errorHandlers {
switch errorHandlerType {
case SentryErrorHandler:
if raven.ProjectID() != "" {
// send error to sentry
data := map[string]string{"service": service, "job": job}
raven.CaptureError(fmt.Errorf(spew.Sdump(err)), data)
}
}
}
if cache.GetLogger() != nil {
// log stacktrace
buf := make([]byte, 1<<16)
stackSize := runtime.Stack(buf, false)
cache.GetLogger().WithField("job", job).Errorln(err.Error() + "\n\n" + string(buf[0:stackSize]))
}
}
// HandleHTTPErrorWith handles a HTTP error, if errorHandlers is nil it will be sent to sentry
// currently supported ErrorHandlerTypes: SentryErrorHandler
func HandleHTTPErrorWith(service string, request *http.Request, err error, errorHandlers ...ErrorHandlerType) {
if errorHandlers == nil {
errorHandlers = []ErrorHandlerType{SentryErrorHandler}
}
for _, errorHandlerType := range errorHandlers {
switch errorHandlerType {
case SentryErrorHandler:
if raven.ProjectID() != "" {
// send error to sentry
raven.Capture(
raven.NewPacket(
err.Error(),
raven.NewException(
err,
raven.NewStacktrace(4, 3, raven.IncludePaths()),
),
raven.NewHttp(request),
),
map[string]string{"service": service},
)
}
}
}
if cache.GetLogger() != nil {
// log stacktrace
buf := make([]byte, 1<<16)
stackSize := runtime.Stack(buf, false)
cache.GetLogger().WithField("module", "http").Errorln(err.Error() + "\n\n" + string(buf[4:stackSize]))
}
}
// CheckErr panics if err is not nil
func CheckErr(err error, message ...string) {
if err != nil {
if cache.HasLogger() && len(message) > 0 {
cache.GetLogger().WithError(err).Panicln(strings.Join(message, " "))
}
panic(err)
}
}
// IsNetworkErr returns true if an error is network related
func IsNetworkErr(err error) (is bool) {
if err == nil {
return false
}
if netError, ok := err.(net.Error); ok && netError.Timeout() {
return true
}
switch t := err.(type) {
case *net.OpError:
if t.Op == "dial" {
return true
} else if t.Op == "read" {
return true
}
case syscall.Errno:
if t == syscall.ECONNREFUSED {
return true
}
}
return false
}