fix some issues found with staticcheck.io

irc/accounts.go

@@ -5,7 +5,6 @@ package irc
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"net/smtp"
 	"strconv"
@@ -480,7 +479,7 @@ func (am *AccountManager) dispatchCallback(client *Client, casefoldedAccount str
 	} else if callbackNamespace == "mailto" {
 		return am.dispatchMailtoCallback(client, casefoldedAccount, callbackValue)
 	} else {
-		return "", errors.New(fmt.Sprintf("Callback not implemented: %s", callbackNamespace))
+		return "", fmt.Errorf("Callback not implemented: %s", callbackNamespace)
 	}
 }
 
@@ -1262,7 +1261,6 @@ func (am *AccountManager) Logout(client *Client) {
 		}
 	}
 	am.accountToClients[casefoldedAccount] = remainingClients
-	return
 }
 
 var (

irc/channel.go

@@ -1043,34 +1043,6 @@ func (channel *Channel) ShowMaskList(client *Client, mode modes.Mode, rb *Respon
 	rb.Add(nil, client.server.name, rplendoflist, nick, channel.name, client.t("End of list"))
 }
 
-func (channel *Channel) applyModeMask(client *Client, mode modes.Mode, op modes.ModeOp, mask string, rb *ResponseBuffer) bool {
-	list := channel.lists[mode]
-	if list == nil {
-		// This should never happen, but better safe than panicky.
-		return false
-	}
-
-	if (op == modes.List) || (mask == "") {
-		channel.ShowMaskList(client, mode, rb)
-		return false
-	}
-
-	if !channel.ClientIsAtLeast(client, modes.ChannelOperator) {
-		rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, client.Nick(), channel.Name(), client.t("You're not a channel operator"))
-		return false
-	}
-
-	if op == modes.Add {
-		return list.Add(mask)
-	}
-
-	if op == modes.Remove {
-		return list.Remove(mask)
-	}
-
-	return false
-}
-
 // Quit removes the given client from the channel
 func (channel *Channel) Quit(client *Client) {
 	channelEmpty := func() bool {

irc/client.go

@@ -538,14 +538,12 @@ func (client *Client) tryResume() (success bool) {
 func (client *Client) tryResumeChannels() {
 	details := client.resumeDetails
 
-	channels := make([]*Channel, len(details.Channels))
 	for _, name := range details.Channels {
 		channel := client.server.channels.Get(name)
 		if channel == nil {
 			continue
 		}
 		channel.Resume(client, details.OldClient, details.Timestamp)
-		channels = append(channels, channel)
 	}
 
 	// replay direct PRIVSMG history

irc/config.go

@@ -393,7 +393,7 @@ func (conf *Config) OperatorClasses() (map[string]*OperClass, error) {
 
 			// get inhereted info from other operclasses
 			if len(info.Extends) > 0 {
-				einfo, _ := ocs[info.Extends]
+				einfo := ocs[info.Extends]
 
 				for capab := range einfo.Capabilities {
 					oc.Capabilities[capab] = true

irc/handlers.go

@@ -1184,20 +1184,14 @@ func inviteHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Re
 func isonHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
 	var nicks = msg.Params
 
-	var err error
+	ison := make([]string, 0, len(msg.Params))
-	var casefoldedNick string
-	ison := make([]string, 0)
 	for _, nick := range nicks {
-		casefoldedNick, err = CasefoldName(nick)
+		if iclient := server.clients.Get(nick); iclient != nil {
-		if err != nil {
+			ison = append(ison, iclient.Nick())
-			continue
-		}
-		if iclient := server.clients.Get(casefoldedNick); iclient != nil {
-			ison = append(ison, iclient.nick)
 		}
 	}
 
-	rb.Add(nil, server.name, RPL_ISON, client.nick, strings.Join(nicks, " "))
+	rb.Add(nil, server.name, RPL_ISON, client.nick, strings.Join(ison, " "))
 	return false
 }
 
@@ -2099,7 +2093,7 @@ func npcaHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Resp
 
 // OPER <name> <password>
 func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
-	if client.HasMode(modes.Operator) == true {
+	if client.HasMode(modes.Operator) {
 		rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.Nick(), "OPER", client.t("You're already opered-up!"))
 		return false
 	}

irc/modes/modes.go

@@ -170,7 +170,7 @@ func SplitChannelMembershipPrefixes(target string) (prefixes string, name string
 			prefixes = target[:i+1]
 			name = target[i+1:]
 		default:
-			break
+			return
 		}
 	}
 

irc/semaphores.go

@@ -36,5 +36,4 @@ func (serversem *ServerSemaphores) Initialize() {
 		capacity = MaxServerSemaphoreCapacity
 	}
 	serversem.ClientDestroy.Initialize(capacity)
-	return
 }

irc/server.go

@@ -24,7 +24,6 @@ import (
 	"github.com/goshuirc/irc-go/ircfmt"
 	"github.com/oragono/oragono/irc/caps"
 	"github.com/oragono/oragono/irc/connection_limits"
-	"github.com/oragono/oragono/irc/isupport"
 	"github.com/oragono/oragono/irc/logger"
 	"github.com/oragono/oragono/irc/modes"
 	"github.com/oragono/oragono/irc/sno"
@@ -73,12 +72,10 @@ type Server struct {
 	ctime               time.Time
 	dlines              *DLineManager
 	helpIndexManager    HelpIndexManager
-	isupport            *isupport.List
 	klines              *KLineManager
 	listeners           map[string]*ListenerWrapper
 	logger              *logger.Manager
 	monitorManager      *MonitorManager
-	motdLines           []string
 	name                string
 	nameCasefolded      string
 	rehashMutex         sync.Mutex // tier 4
@@ -176,13 +173,6 @@ func (config *Config) generateISupport() (err error) {
 	return
 }
 
-func loadChannelList(channel *Channel, list string, maskMode modes.Mode) {
-	if list == "" {
-		return
-	}
-	channel.lists[maskMode].AddAll(strings.Split(list, " "))
-}
-
 // Shutdown shuts down the server.
 func (server *Server) Shutdown() {
 	//TODO(dan): Make sure we disallow new nicks
@@ -518,9 +508,7 @@ func (client *Client) getWhoisOf(target *Client, rb *ResponseBuffer) {
 	tLanguages := target.Languages()
 	if 0 < len(tLanguages) {
 		params := []string{cnick, tnick}
-		for _, str := range client.server.Languages().Codes(tLanguages) {
+		params = append(params, client.server.Languages().Codes(tLanguages)...)
-			params = append(params, str)
-		}
 		params = append(params, client.t("can speak these languages"))
 		rb.Add(nil, client.server.name, RPL_WHOISLANGUAGE, params...)
 	}

irc/snomanager.go

@@ -52,7 +52,7 @@ func (m *SnoManager) RemoveMasks(client *Client, masks ...sno.Mask) {
 	for _, mask := range masks {
 		currentClientList := m.sendLists[mask]
 
-		if currentClientList == nil || len(currentClientList) == 0 {
+		if len(currentClientList) == 0 {
 			continue
 		}
 
@@ -70,7 +70,7 @@ func (m *SnoManager) RemoveClient(client *Client) {
 	for mask := range m.sendLists {
 		currentClientList := m.sendLists[mask]
 
-		if currentClientList == nil || len(currentClientList) == 0 {
+		if len(currentClientList) == 0 {
 			continue
 		}
 
@@ -87,7 +87,7 @@ func (m *SnoManager) Send(mask sno.Mask, content string) {
 
 	currentClientList := m.sendLists[mask]
 
-	if currentClientList == nil || len(currentClientList) == 0 {
+	if len(currentClientList) == 0 {
 		return
 	}