package main import ( "context" "encoding/json" "fmt" "log" "net/http" "os" "sync" "time" "github.com/tylertravisty/rum-goggles/v1/internal/config" "github.com/tylertravisty/rum-goggles/v1/internal/events" "github.com/tylertravisty/rum-goggles/v1/internal/models" rumblelivestreamlib "github.com/tylertravisty/rumble-livestream-lib-go" "github.com/wailsapp/wails/v2/pkg/runtime" _ "github.com/mattn/go-sqlite3" ) const ( AccountType = "Account" ChannelType = "Channel" ) type ApiState struct { active bool activeMu sync.Mutex resp *rumblelivestreamlib.LivestreamResponse respMu sync.Mutex } type Page struct { active bool activeMu sync.Mutex apiSt *ApiState displaying bool displayingMu sync.Mutex name string } // App struct type App struct { //apiS *ApiService cancelCtrl context.CancelFunc clients map[string]*rumblelivestreamlib.Client clientsMu sync.Mutex displaying string displayingMu sync.Mutex logError *log.Logger logFile *os.File logFileMu sync.Mutex logInfo *log.Logger pages map[string]*Page pagesMu sync.Mutex producers *events.Producers services *models.Services wails context.Context } // NewApp creates a new App application struct func NewApp() *App { app := &App{ clients: map[string]*rumblelivestreamlib.Client{}, pages: map[string]*Page{}, } err := app.log() if err != nil { log.Fatal("error initializing log: ", err) } //app.apiS = NewApiService(app.logError, app.logInfo) return app } func (a *App) log() error { a.logFileMu.Lock() defer a.logFileMu.Unlock() f, err := config.Log() if err != nil { return fmt.Errorf("error getting log file: %v", err) } a.logFile = f a.logInfo = log.New(f, "[info]", log.LstdFlags|log.Lshortfile) a.logError = log.New(f, "[error]", log.LstdFlags|log.Lshortfile) return nil } // startup is called when the app starts. The context is saved // so we can call the runtime methods func (a *App) startup(wails context.Context) { a.wails = wails //a.apiS.Startup(a.apiS.ch) // ctx, cancel := context.WithCancel(context.Background()) // a.cancelCtrl = cancel // go a.handle(ctx) } func (a *App) handle(ctx context.Context) { for { select { case apiE := <-a.producers.ApiP.Ch: err := a.handleApi(apiE) if err != nil { a.logError.Println("error handling API event:", err) } case <-ctx.Done(): return } } } func (a *App) handleApi(event events.Api) error { if event.Name == "" { return fmt.Errorf("event name is empty") } a.pagesMu.Lock() defer a.pagesMu.Unlock() page, exists := a.pages[event.Name] if !exists { page = &Page{ apiSt: &ApiState{}, name: event.Name, } a.pages[event.Name] = page } page.apiSt.activeMu.Lock() page.apiSt.active = event.Stop page.apiSt.activeMu.Unlock() if event.Stop { runtime.EventsEmit(a.wails, "ApiActive-"+page.name, false) return nil } runtime.EventsEmit(a.wails, "ApiActive-"+page.name, true) page.displayingMu.Lock() if page.displaying { runtime.EventsEmit(a.wails, "PageActive", true) } page.displayingMu.Unlock() page.apiSt.respMu.Lock() page.apiSt.resp = event.Resp page.apiSt.respMu.Unlock() a.updatePage(page) return nil } func (a *App) shutdown(ctx context.Context) { // if a.apiS != nil && a.apiS.Api != nil { // err := a.apiS.Shutdown() // if err != nil { // a.logError.Println("error shutting down api:", err) // } // close(a.apiS.ch) // } err := a.producers.Shutdown() if err != nil { a.logError.Println("error closing event producers:", err) } a.cancelCtrl() if a.services != nil { err := a.services.Close() if err != nil { a.logError.Println("error closing services:", err) } } a.logFileMu.Lock() if a.logFile != nil { err := a.logFile.Close() if err != nil { log.Println("error closing log file:", err) } } a.logFileMu.Unlock() } func (a *App) Start() (bool, error) { runtime.EventsEmit(a.wails, "StartupMessage", "Initializing database...") err := a.initServices() if err != nil { a.logError.Println("error initializing services:", err) return false, fmt.Errorf("Error starting Rum Goggles. Try restarting.") } runtime.EventsEmit(a.wails, "StartupMessage", "Initializing database complete.") runtime.EventsEmit(a.wails, "StartupMessage", "Verifying account sessions...") count, err := a.verifyAccounts() if err != nil { a.logError.Println("error verifying accounts:", err) return false, fmt.Errorf("Error starting Rum Goggles. Try restarting.") } runtime.EventsEmit(a.wails, "StartupMessage", "Verifying account sessions complete.") runtime.EventsEmit(a.wails, "StartupMessage", "Initializing event producers...") err = a.initProducers() if err != nil { a.logError.Println("error initializing producers:", err) return false, fmt.Errorf("Error starting Rum Goggles. Try restarting.") } runtime.EventsEmit(a.wails, "StartupMessage", "Initializing event producers complete.") // TODO: check for update - if available, pop up window // runtime.EventsEmit(a.ctx, "StartupMessage", "Checking for updates...") // update, err = a.checkForUpdate() // runtime.EventsEmit(a.ctx, "StartupMessage", "Checking for updates complete.") ctx, cancel := context.WithCancel(context.Background()) a.cancelCtrl = cancel go a.handle(ctx) signin := true if count > 0 { signin = false } return signin, nil } func (a *App) initProducers() error { producers, err := events.NewProducers( events.WithLoggers(a.logError, a.logInfo), events.WithApiProducer(), ) if err != nil { return fmt.Errorf("error initializing producers: %v", err) } err = producers.Startup() if err != nil { return fmt.Errorf("error starting producers: %v", err) } a.producers = producers return nil } func (a *App) initServices() error { db, err := config.Database() if err != nil { return fmt.Errorf("error getting database config: %v", err) } services, err := models.NewServices( models.WithDatabase(db), models.WithAccountService(), models.WithChannelService(), models.WithAccountChannelService(), ) if err != nil { return fmt.Errorf("error initializing services: %v", err) } err = services.AutoMigrate() if err != nil { return fmt.Errorf("error auto-migrating services: %v", err) } a.services = services return nil } func (a *App) verifyAccounts() (int, error) { accounts, err := a.services.AccountS.All() if err != nil { return -1, fmt.Errorf("error querying all accounts: %v", err) } a.clientsMu.Lock() defer a.clientsMu.Unlock() for _, account := range accounts { if account.Cookies != nil { var cookies []*http.Cookie err = json.Unmarshal([]byte(*account.Cookies), &cookies) if err != nil { return -1, fmt.Errorf("error un-marshaling cookie string: %v", err) } client, err := rumblelivestreamlib.NewClient(rumblelivestreamlib.NewClientOptions{Cookies: cookies}) if err != nil { return -1, fmt.Errorf("error creating new client: %v", err) } if account.Username == nil { return -1, fmt.Errorf("account username is nil") } loggedIn, err := client.LoggedIn() if err != nil { return -1, fmt.Errorf("error check if account is logged in: %v", err) } if loggedIn { a.clients[*account.Username] = client } else { account.Cookies = nil err = a.services.AccountS.Update(&account) fmt.Errorf("error updating account: %v", err) } } } return len(accounts), nil } func (a *App) AddPage(apiKey string) error { client := rumblelivestreamlib.Client{StreamKey: apiKey} resp, err := client.Request() if err != nil { a.logError.Println("error executing api request:", err) return fmt.Errorf("Error querying API. Verify key and try again.") } userKey := apiKey channelKey := "" if resp.Type == "channel" { userKey = "" channelKey = apiKey } err = a.addAccountNotExist(resp.UserID, resp.Username, userKey) if err != nil { a.logError.Println("error adding account if not exist:", err) return fmt.Errorf("Error adding channel. Try again.") } if resp.Type == "channel" { err = a.addChannelNotExist(resp.Username, fmt.Sprint(resp.ChannelID), resp.ChannelName, channelKey) if err != nil { a.logError.Println("error adding channel if not exist:", err) return fmt.Errorf("Error adding channel. Try again.") } } return nil } func (a *App) addAccountNotExist(uid string, username string, apiKey string) error { acct, err := a.services.AccountS.ByUsername(username) if err != nil { return fmt.Errorf("error querying account by username: %v", err) } if acct == nil { _, err = a.services.AccountS.Create(&models.Account{ UID: &uid, Username: &username, ApiKey: &apiKey, }) if err != nil { return fmt.Errorf("error creating account: %v", err) } } return nil } func (a *App) addChannelNotExist(username string, cid string, name string, apiKey string) error { channel, err := a.services.ChannelS.ByName(name) if err != nil { return fmt.Errorf("error querying channel by name: %v", err) } if channel == nil { acct, err := a.services.AccountS.ByUsername(username) if err != nil { return fmt.Errorf("error querying account by username: %v", err) } if acct == nil { return fmt.Errorf("account does not exist with username: %s", username) } err = a.services.ChannelS.Create(&models.Channel{ AccountID: acct.ID, CID: &cid, Name: &name, ApiKey: &apiKey, }) if err != nil { return fmt.Errorf("error creating channel: %v", err) } } return nil } func (a *App) Login(username string, password string) error { var err error a.clientsMu.Lock() defer a.clientsMu.Unlock() client, exists := a.clients[username] if exists && client != nil { err = client.Logout() if err != nil { a.logError.Println("error logging out:", err) return fmt.Errorf("Error logging in. Try again.") } } else { client, err = rumblelivestreamlib.NewClient(rumblelivestreamlib.NewClientOptions{}) } cookies, err := client.Login(username, password) if err != nil { a.logError.Println("error logging in:", err) return fmt.Errorf("Error logging in. Try again.") } a.clients[username] = client cookiesB, err := json.Marshal(cookies) if err != nil { a.logError.Println("error marshaling cookies into json:", err) return fmt.Errorf("Error logging in. Try again.") } cookiesS := string(cookiesB) acct, err := a.services.AccountS.ByUsername(username) if err != nil { a.logError.Println("error getting account by username:", err) return fmt.Errorf("Error logging in. Try again.") } if acct == nil { acct = &models.Account{nil, nil, &username, &cookiesS, nil, nil} id, err := a.services.AccountS.Create(acct) if err != nil { a.logError.Println("error creating account:", err) return fmt.Errorf("Error logging in. Try again.") } acct.ID = &id } else { acct.Cookies = &cookiesS err = a.services.AccountS.Update(acct) if err != nil { a.logError.Println("error updating account:", err) return fmt.Errorf("Error logging in. Try again.") } } name := acct.String() if name == nil { a.logError.Println("account name is nil") return fmt.Errorf("Error logging in. Try again.") } runtime.EventsEmit(a.wails, "LoggedIn-"+*name, true) list, err := a.accountList() if err != nil { a.logError.Println("error getting account list:", err) return fmt.Errorf("Error logging in. Try again.") } runtime.EventsEmit(a.wails, "PageSideBarAccounts", list) err = a.openDetails(acct) if err != nil { a.logError.Println("error opening account details:", err) return fmt.Errorf("Error logging in. Try again.") } return nil } func (a *App) Logout(id int64) error { acct, err := a.services.AccountS.ByID(id) if err != nil { a.logError.Println("error querying account by ID:", err) return fmt.Errorf("Error logging out. Try again.") } if acct == nil { return fmt.Errorf("Did not find account. Try again.") } if acct.Username == nil { a.logError.Println("account username is nil") return fmt.Errorf("Error logging out. Try again.") } a.clientsMu.Lock() defer a.clientsMu.Unlock() client, exists := a.clients[*acct.Username] if exists { err = client.Logout() if err != nil { a.logError.Println("error logging out:", err) return fmt.Errorf("Error logging out. Try again.") } delete(a.clients, *acct.Username) } if acct.Cookies != nil { if !exists { var cookies []*http.Cookie err = json.Unmarshal([]byte(*acct.Cookies), &cookies) if err != nil { a.logError.Println("error un-marshaling cookie string:", err) return fmt.Errorf("Error logging out. Try again.") } client, err = rumblelivestreamlib.NewClient(rumblelivestreamlib.NewClientOptions{Cookies: cookies}) err = client.Logout() if err != nil { a.logError.Println("error logging out:", err) return fmt.Errorf("Error logging out. Try again.") } } acct.Cookies = nil err = a.services.AccountS.Update(acct) if err != nil { a.logError.Println("error updating account:", err) return fmt.Errorf("Error logging out. Try again.") } } name := acct.String() if name == nil { a.logError.Println("account name is nil") return fmt.Errorf("Error logging out. Try again.") } runtime.EventsEmit(a.wails, "LoggedIn-"+*name, false) list, err := a.accountList() if err != nil { a.logError.Println("error getting account list:", err) return fmt.Errorf("Error logging out. Try again.") } runtime.EventsEmit(a.wails, "PageSideBarAccounts", list) err = a.openDetails(acct) if err != nil { a.logError.Println("error opening account details:", err) return fmt.Errorf("Error logging out. Try again.") } return nil } func (a *App) SignedIn() (bool, error) { accounts, err := a.services.AccountS.All() if err != nil { a.logError.Println("error getting all accounts:", err) return false, fmt.Errorf("Error retrieving accounts. Try restarting.") } return len(accounts) > 0, nil } type Account struct { Account models.Account `json:"account"` Channels []models.Channel `json:"channels"` } func (a *App) AccountList() (map[string]*Account, error) { list, err := a.accountList() if err != nil { a.logError.Println("error getting account list:", err) return nil, fmt.Errorf("Error retrieving accounts and channels. Try restarting.") } return list, nil } func (a *App) accountList() (map[string]*Account, error) { list := map[string]*Account{} accountChannels, err := a.services.AccountChannelS.All() if err != nil { return nil, fmt.Errorf("error querying all account channels: %v", err) } for _, ac := range accountChannels { if ac.Account.Username == nil { return nil, fmt.Errorf("account-channel contains nil account username") } act, exists := list[*ac.Account.Username] if !exists || act == nil { act = &Account{ac.Account, []models.Channel{}} list[*ac.Account.Username] = act } if ac.Channel.AccountID != nil { act.Channels = append(act.Channels, ac.Channel) } } return list, nil } func (a *App) OpenAccount(id int64) error { acct, err := a.services.AccountS.ByID(id) if err != nil { a.logError.Println("error querying account by ID:", err) return fmt.Errorf("Error opening account. Try again.") } if acct == nil { return fmt.Errorf("Did not find account. Try again.") } err = a.openDetails(acct) if err != nil { a.logError.Println("error opening account details:", err) return fmt.Errorf("Error opening account. Try again.") } return nil } func (a *App) OpenChannel(id int64) error { channel, err := a.services.ChannelS.ByID(id) if err != nil { a.logError.Println("error querying channel by ID:", err) return fmt.Errorf("Error opening channel. Try again.") } if channel == nil { return fmt.Errorf("Did not find channel. Try again.") } err = a.openDetails(channel) if err != nil { a.logError.Println("error opening channel details:", err) return fmt.Errorf("Error opening channel. Try again.") } return nil } type PageInfo interface { Id() *int64 KeyUrl() *string LoggedIn() bool String() *string Title() *string Type() string } type PageDetails struct { ID int64 `json:"id"` HasApi bool `json:"has_api"` LoggedIn bool `json:"logged_in"` Title string `json:"title"` Type string `json:"type"` } func (a *App) openDetails(pi PageInfo) error { id := pi.Id() if id == nil { return fmt.Errorf("page id is nil") } hasApi := true key := pi.KeyUrl() if key == nil || *key == "" { hasApi = false } name := pi.String() if name == nil { return fmt.Errorf("page name is nil") } title := pi.Title() if title == nil { return fmt.Errorf("page title is nil") } runtime.EventsEmit(a.wails, "PageDetails", PageDetails{ ID: *id, HasApi: hasApi, LoggedIn: pi.LoggedIn(), Title: *title, Type: pi.Type(), }) err := a.display(*name) if err != nil { return fmt.Errorf("error displaying page: %v", err) } return nil } func (a *App) ActivateAccount(id int64) error { acct, err := a.services.AccountS.ByID(id) if err != nil { a.logError.Println("error querying account by ID:", err) return fmt.Errorf("Error activating account. Try again.") } if acct == nil { return fmt.Errorf("Did not find account. Try again.") } err = a.activatePage(acct) if err != nil { a.logError.Println("error activating account:", err) return fmt.Errorf("Error activating account. Try again.") } return nil } // ActivateChannel activates an inactivate page and deactivates an active page. func (a *App) ActivateChannel(id int64) error { channel, err := a.services.ChannelS.ByID(id) if err != nil { a.logError.Println("error querying channel by ID:", err) return fmt.Errorf("Error activating channel. Try again.") } if channel == nil { return fmt.Errorf("Did not find channel. Try again.") } err = a.activatePage(channel) if err != nil { a.logError.Println("error activating channel:", err) return fmt.Errorf("Error activating channel. Try again.") } return nil } // If page is inactivate, activate. // If page is active, deactivate. func (a *App) activatePage(pi PageInfo) error { name := pi.String() if name == nil { return fmt.Errorf("page name is nil") } url := pi.KeyUrl() if url == nil { return fmt.Errorf("page key url is nil") } a.pagesMu.Lock() page, exists := a.pages[*name] if !exists { page = &Page{ active: false, apiSt: &ApiState{}, name: *name, } a.pages[*name] = page } a.pagesMu.Unlock() page.activeMu.Lock() defer page.activeMu.Unlock() if page.active { if a.producers.ApiP.Active(*name) { err := a.producers.ApiP.Stop(*name) if err != nil { return fmt.Errorf("error stopping api: %v", err) } } page.displayingMu.Lock() if page.displaying { runtime.EventsEmit(a.wails, "PageActive", false) } page.displayingMu.Unlock() page.active = false return nil } page.active = true err := a.producers.ApiP.Start(*name, *url, 10*time.Second) if err != nil { return fmt.Errorf("error starting api: %v", err) } runtime.EventsEmit(a.wails, "ApiActive-"+*name, true) err = a.display(*name) if err != nil { return fmt.Errorf("error displaying page: %v", err) } runtime.EventsEmit(a.wails, "PageActive", true) return nil } func (a *App) DeleteAccount(id int64) error { acct, err := a.services.AccountS.ByID(id) if err != nil { a.logError.Println("error querying account by ID:", err) return fmt.Errorf("Error deleting account. Try again.") } if acct == nil { return fmt.Errorf("Did not find account. Try again.") } channels, err := a.services.ChannelS.ByAccount(acct) if err != nil { a.logError.Println("error querying channels by account:", err) return fmt.Errorf("Error deleting account. Try again.") } if len(channels) != 0 { return fmt.Errorf("You must delete all channels associated with the account before it can be deleted.") } name := acct.String() if name == nil { a.logError.Println("account name is nil") return fmt.Errorf("Error deleting account. Try again.") } if a.producers.ApiP.Active(*name) { err := a.producers.ApiP.Stop(*name) if err != nil { a.logError.Println("error stopping api:", err) return fmt.Errorf("Error deleting account. Try again.") } } err = a.services.AccountS.Delete(acct) if err != nil { a.logError.Println("error deleting account:", err) return fmt.Errorf("Error deleting account. Try again.") } runtime.EventsEmit(a.wails, "PageDetails", nil) list, err := a.accountList() if err != nil { a.logError.Println("error getting account list:", err) return fmt.Errorf("Error deleting account. Try again.") } runtime.EventsEmit(a.wails, "PageSideBarAccounts", list) return nil } func (a *App) DeleteChannel(id int64) error { channel, err := a.services.ChannelS.ByID(id) if err != nil { a.logError.Println("error querying channel by ID:", err) return fmt.Errorf("Error deleting channel. Try again.") } if channel == nil { return fmt.Errorf("Did not find channel. Try again.") } name := channel.String() if name == nil { a.logError.Println("channel name is nil") return fmt.Errorf("Error deleting channel. Try again.") } if a.producers.ApiP.Active(*name) { err := a.producers.ApiP.Stop(*name) if err != nil { a.logError.Println("error stopping api:", err) return fmt.Errorf("Error deleting channel. Try again.") } } err = a.services.ChannelS.Delete(channel) if err != nil { a.logError.Println("error deleting channel:", err) return fmt.Errorf("Error deleting channel. Try again.") } runtime.EventsEmit(a.wails, "PageDetails", nil) list, err := a.accountList() if err != nil { a.logError.Println("error getting account list:", err) return fmt.Errorf("Error deleting channel. Try again.") } runtime.EventsEmit(a.wails, "PageSideBarAccounts", list) return nil } func (a *App) display(name string) error { a.displayingMu.Lock() defer a.displayingMu.Unlock() if name == a.displaying { return nil } a.pagesMu.Lock() defer a.pagesMu.Unlock() if a.displaying != "" { displaying, exists := a.pages[a.displaying] a.displaying = "" if !exists { return fmt.Errorf("displaying page does not exist: %s", a.display) } displaying.displayingMu.Lock() displaying.displaying = false displaying.displayingMu.Unlock() } page, exists := a.pages[name] if !exists { page = &Page{ active: false, apiSt: &ApiState{}, name: name, } a.pages[name] = page } page.displayingMu.Lock() page.displaying = true page.displayingMu.Unlock() a.displaying = name err := a.updatePage(page) if err != nil { return fmt.Errorf("error updating page: %v", err) } return nil } func (a *App) updatePage(p *Page) error { if p == nil { return fmt.Errorf("page is nil") } //TODO check p.api == nil p.apiSt.respMu.Lock() defer p.apiSt.respMu.Unlock() p.displayingMu.Lock() if p.displaying { runtime.EventsEmit(a.wails, "PageActivity", p.apiSt.resp) p.activeMu.Lock() runtime.EventsEmit(a.wails, "PageActive", p.active) p.activeMu.Unlock() } p.displayingMu.Unlock() if p.apiSt.resp != nil { isLive := len(p.apiSt.resp.Livestreams) > 0 runtime.EventsEmit(a.wails, "PageLive-"+p.name, isLive) } return nil } func (a *App) PageStatus(name string) { active := false isLive := false // resp := a.api.Response(name) a.pagesMu.Lock() defer a.pagesMu.Unlock() page, exists := a.pages[name] if exists && page.apiSt != nil { page.apiSt.activeMu.Lock() active = page.apiSt.active page.apiSt.activeMu.Unlock() page.apiSt.respMu.Lock() if page.apiSt.resp != nil { isLive = len(page.apiSt.resp.Livestreams) > 0 } page.apiSt.respMu.Unlock() } runtime.EventsEmit(a.wails, "ApiActive-"+name, active) runtime.EventsEmit(a.wails, "PageLive-"+name, isLive) } func (a *App) UpdateAccountApi(id int64, apiKey string) error { acct, err := a.services.AccountS.ByID(id) if err != nil { a.logError.Println("error querying account by ID:", err) return fmt.Errorf("Error updating account. Try again.") } if acct == nil { return fmt.Errorf("Did not find account. Try again.") } name := acct.String() if name == nil { a.logError.Println("account name is nil") return fmt.Errorf("Error updating account. Try again.") } if a.producers.ApiP.Active(*name) { err := a.producers.ApiP.Stop(*name) if err != nil { a.logError.Println("error stopping api:", err) return fmt.Errorf("Error updating account. Try again.") } } client := rumblelivestreamlib.Client{StreamKey: apiKey} resp, err := client.Request() if err != nil { a.logError.Println("error executing api request:", err) return fmt.Errorf("Error querying API. Verify key and try again.") } if resp.ChannelName != "" || resp.Username != *acct.Username { return fmt.Errorf("API key does not belong to account. Verify key and try again.") } acct.ApiKey = &apiKey err = a.services.AccountS.Update(acct) if err != nil { a.logError.Println("error updating account:", err) return fmt.Errorf("Error updating account. Try again.") } return nil } func (a *App) UpdateChannelApi(id int64, apiKey string) error { channel, err := a.services.ChannelS.ByID(id) if err != nil { a.logError.Println("error querying channel by ID:", err) return fmt.Errorf("Error updating channel. Try again.") } if channel == nil { return fmt.Errorf("Did not find channel. Try again.") } name := channel.String() if name == nil { a.logError.Println("channel name is nil") return fmt.Errorf("Error updating channel. Try again.") } if a.producers.ApiP.Active(*name) { err := a.producers.ApiP.Stop(*name) if err != nil { a.logError.Println("error stopping api:", err) return fmt.Errorf("Error updating channel. Try again.") } } client := rumblelivestreamlib.Client{StreamKey: apiKey} resp, err := client.Request() if err != nil { a.logError.Println("error executing api request:", err) return fmt.Errorf("Error querying API. Verify key and try again.") } if resp.ChannelName != *channel.Name { return fmt.Errorf("API key does not belong to channel. Verify key and try again.") } *channel.ApiKey = apiKey err = a.services.ChannelS.Update(channel) if err != nil { a.logError.Println("error updating channel:", err) return fmt.Errorf("Error updating channel. Try again.") } return nil }