package main import ( "fmt" "strings" "sync" "time" "github.com/Luzifer/go_helpers/v2/str" "github.com/go-irc/irc" "github.com/mitchellh/hashstructure/v2" "github.com/pkg/errors" "github.com/robfig/cron/v3" log "github.com/sirupsen/logrus" ) var cronParser = cron.NewParser(cron.SecondOptional | cron.Minute | cron.Hour | cron.Dom | cron.Month | cron.Dow | cron.Descriptor) type autoMessage struct { UUID string `hash:"-" json:"uuid,omitempty" yaml:"uuid,omitempty"` Channel string `json:"channel,omitempty" yaml:"channel,omitempty"` Message string `json:"message,omitempty" yaml:"message,omitempty"` UseAction bool `json:"use_action,omitempty" yaml:"use_action,omitempty"` DisableOnTemplate *string `json:"disable_on_template,omitempty" yaml:"disable_on_template,omitempty"` Cron string `json:"cron,omitempty" yaml:"cron,omitempty"` MessageInterval int64 `json:"message_interval,omitempty" yaml:"message_interval,omitempty"` OnlyOnLive bool `json:"only_on_live,omitempty" yaml:"only_on_live,omitempty"` disabled bool lastMessageSent time.Time linesSinceLastMessage int64 lock sync.RWMutex } func (a *autoMessage) CanSend() bool { a.lock.RLock() defer a.lock.RUnlock() if a.disabled || !a.IsValid() { return false } switch { case !str.StringInSlice(a.Channel, config.Channels): // Not an observed channel, auto-message is not valid return false case a.MessageInterval > a.linesSinceLastMessage: // Not enough chatted lines return false case a.Cron != "": sched, _ := cronParser.Parse(a.Cron) nextExecute := sched.Next(a.lastMessageSent) if nextExecute.After(time.Now()) { // Cron timer is not yet expired return false } log.WithFields(log.Fields{ "lastMessage": a.lastMessageSent, "nextExecution": nextExecute, "now": time.Now(), }).Trace("Auto-Message was allowed through cron") } if a.OnlyOnLive { streamLive, err := twitchClient.HasLiveStream(strings.TrimLeft(a.Channel, "#")) if err != nil { log.WithError(err).Error("Unable to determine channel live status") return false } if !streamLive { // Timer is only to be triggered during stream being live, // reset the timer in order not to spam all messages on stream-start a.lastMessageSent = time.Now() return false } } if !a.allowExecuteDisableOnTemplate() { log.Trace("Auto-Message disabled by template") // Reset the timer for this execution not to spam every second a.lastMessageSent = time.Now() return false } return true } func (a *autoMessage) CountMessage(channel string) { if strings.TrimLeft(channel, "#") != strings.TrimLeft(a.Channel, "#") { return } a.lock.Lock() defer a.lock.Unlock() a.linesSinceLastMessage++ } func (a *autoMessage) ID() string { if a.UUID != "" { return a.UUID } h, err := hashstructure.Hash(a, hashstructure.FormatV2, nil) if err != nil { panic(errors.Wrap(err, "hashing automessage")) } return fmt.Sprintf("hashstructure:%x", h) } func (a *autoMessage) IsValid() bool { if a.Cron != "" { if _, err := cronParser.Parse(a.Cron); err != nil { return false } } if a.MessageInterval == 0 && a.Cron == "" { return false } return true } func (a *autoMessage) Send(c *irc.Client) error { a.lock.Lock() defer a.lock.Unlock() msg, err := formatMessage(a.Message, nil, nil, nil) if err != nil { return errors.Wrap(err, "preparing message") } if a.UseAction { msg = fmt.Sprintf("\001ACTION %s\001", msg) } if err := c.WriteMessage(&irc.Message{ Command: "PRIVMSG", Params: []string{ fmt.Sprintf("#%s", strings.TrimLeft(a.Channel, "#")), msg, }, }); err != nil { return errors.Wrap(err, "sending auto-message") } a.lastMessageSent = time.Now() a.linesSinceLastMessage = 0 return nil } func (a *autoMessage) allowExecuteDisableOnTemplate() bool { if a.DisableOnTemplate == nil || *a.DisableOnTemplate == "" { // No match criteria set, does not speak against matching return true } res, err := formatMessage(*a.DisableOnTemplate, nil, nil, map[string]interface{}{ "channel": a.Channel, }) if err != nil { log.WithError(err).Error("Error in auto-message disable template") // Caused an error, forbid execution return false } return res != "true" }