package main import ( "fmt" "net/http" "os" "strings" "sync" "time" "github.com/go-irc/irc" "github.com/gorilla/mux" "github.com/pkg/errors" "github.com/robfig/cron/v3" log "github.com/sirupsen/logrus" "github.com/Luzifer/go_helpers/v2/str" "github.com/Luzifer/rconfig/v2" "github.com/Luzifer/twitch-bot/twitch" ) const ircReconnectDelay = 100 * time.Millisecond var ( cfg = struct { CommandTimeout time.Duration `flag:"command-timeout" default:"30s" description:"Timeout for command execution"` Config string `flag:"config,c" default:"./config.yaml" description:"Location of configuration file"` IRCRateLimit time.Duration `flag:"rate-limit" default:"1500ms" description:"How often to send a message (default: 20/30s=1500ms, if your bot is mod everywhere: 100/30s=300ms, different for known/verified bots)"` LogLevel string `flag:"log-level" default:"info" description:"Log level (debug, info, warn, error, fatal)"` PluginDir string `flag:"plugin-dir" default:"/usr/lib/twitch-bot" description:"Where to find and load plugins"` StorageFile string `flag:"storage-file" default:"./storage.json.gz" description:"Where to store the data"` TwitchClient string `flag:"twitch-client" default:"" description:"Client ID to act as"` TwitchToken string `flag:"twitch-token" default:"" description:"OAuth token valid for client"` ValidateConfig bool `flag:"validate-config,v" default:"false" description:"Loads the config, logs any errors and quits with status 0 on success"` VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"` }{} config *configFile configLock = new(sync.RWMutex) cronService *cron.Cron ircHdl *ircHandler router = mux.NewRouter() sendMessage func(m *irc.Message) error store = newStorageFile(false) twitchClient *twitch.Client version = "dev" ) func init() { for _, a := range os.Args { if strings.HasPrefix(a, "-test.") { // Skip initialize for test run store = newStorageFile(true) // Use in-mem-store for tests return } } rconfig.AutoEnv(true) if err := rconfig.ParseAndValidate(&cfg); err != nil { log.Fatalf("Unable to parse commandline options: %s", err) } if cfg.VersionAndExit { fmt.Printf("twitch-bot %s\n", version) os.Exit(0) } if l, err := log.ParseLevel(cfg.LogLevel); err != nil { log.WithError(err).Fatal("Unable to parse log level") } else { log.SetLevel(l) } } //nolint: funlen,gocognit,gocyclo // Complexity is a little too high but makes no sense to split func main() { var err error cronService = cron.New() twitchClient = twitch.New(cfg.TwitchClient, cfg.TwitchToken) twitchWatch := newTwitchWatcher() cronService.AddFunc("@every 10s", twitchWatch.Check) // Query may run that often as the twitchClient has an internal cache router.HandleFunc("/", handleSwaggerHTML) router.HandleFunc("/openapi.json", handleSwaggerRequest) if err = initCorePlugins(); err != nil { log.WithError(err).Fatal("Unable to load core plugins") } if err = loadPlugins(cfg.PluginDir); err != nil { log.WithError(err).Fatal("Unable to load plugins") } if err = loadConfig(cfg.Config); err != nil { log.WithError(err).Fatal("Initial config load failed") } defer func() { config.CloseRawMessageWriter() }() if cfg.ValidateConfig { // We were asked to only validate the config, this was successful log.Info("Config validated successfully") return } for _, c := range config.Channels { if err := twitchWatch.AddChannel(c); err != nil { log.WithError(err).WithField("channel", c).Error("Unable to add channel to watcher") } } if err = startCheck(); err != nil { log.WithError(err).Fatal("Missing required parameters") } if err = store.Load(); err != nil { log.WithError(err).Fatal("Unable to load storage file") } fsEvents := make(chan configChangeEvent, 1) go watchConfigChanges(cfg.Config, fsEvents) var ( ircDisconnected = make(chan struct{}, 1) autoMessageTicker = time.NewTicker(time.Second) ) cronService.Start() if config.HTTPListen != "" { // If listen address is configured start HTTP server go http.ListenAndServe(config.HTTPListen, router) } ircDisconnected <- struct{}{} for { select { case <-ircDisconnected: if ircHdl != nil { sendMessage = nil ircHdl.Close() } if ircHdl, err = newIRCHandler(); err != nil { log.WithError(err).Fatal("Unable to create IRC client") } go func() { sendMessage = ircHdl.SendMessage if err := ircHdl.Run(); err != nil { log.WithError(err).Error("IRC run exited unexpectedly") } sendMessage = nil time.Sleep(ircReconnectDelay) ircDisconnected <- struct{}{} }() case evt := <-fsEvents: switch evt { case configChangeEventUnkown: continue case configChangeEventNotExist: log.Error("Config file is not available, not reloading config") continue case configChangeEventModified: // Fine, reload } previousChannels := append([]string{}, config.Channels...) if err := loadConfig(cfg.Config); err != nil { log.WithError(err).Error("Unable to reload config") continue } ircHdl.ExecuteJoins(config.Channels) for _, c := range config.Channels { if err := twitchWatch.AddChannel(c); err != nil { log.WithError(err).WithField("channel", c).Error("Unable to add channel to watcher") } } for _, c := range previousChannels { if !str.StringInSlice(c, config.Channels) { log.WithField("channel", c).Info("Leaving removed channel...") ircHdl.ExecutePart(c) if err := twitchWatch.RemoveChannel(c); err != nil { log.WithError(err).WithField("channel", c).Error("Unable to remove channel from watcher") } } } case <-autoMessageTicker.C: configLock.RLock() for _, am := range config.AutoMessages { if !am.CanSend() { continue } if err := am.Send(ircHdl.c); err != nil { log.WithError(err).Error("Unable to send automated message") } } configLock.RUnlock() } } } func startCheck() error { var errs []string if cfg.TwitchClient == "" { errs = append(errs, "No Twitch-ClientId given") } if cfg.TwitchToken == "" { errs = append(errs, "Twitch-Token is unset") } if len(errs) > 0 { fmt.Println(` You've not provided a Twitch-ClientId and/or a Twitch-Token. These parameters are required and you need to provide them. In case you need help with obtaining those credentials please visit the following website: https://luzifer.github.io/twitch-bot/ You will be guided through the token generation and can afterwards provide the required configuration parameters.`) return errors.New(strings.Join(errs, ", ")) } return nil }