Linting.

discord_test.go

@@ -12,13 +12,13 @@ import (
 var (
 	dg *Session // Stores global discordgo session
 
-	envToken    string = os.Getenv("DG_TOKEN")    // Token to use when authenticating
+	envToken    = os.Getenv("DG_TOKEN")    // Token to use when authenticating
-	envEmail    string = os.Getenv("DG_EMAIL")    // Email to use when authenticating
+	envEmail    = os.Getenv("DG_EMAIL")    // Email to use when authenticating
-	envPassword string = os.Getenv("DG_PASSWORD") // Password to use when authenticating
+	envPassword = os.Getenv("DG_PASSWORD") // Password to use when authenticating
-	envGuild    string = os.Getenv("DG_GUILD")    // Guild ID to use for tests
+	envGuild    = os.Getenv("DG_GUILD")    // Guild ID to use for tests
-	envChannel  string = os.Getenv("DG_CHANNEL")  // Channel ID to use for tests
+	envChannel  = os.Getenv("DG_CHANNEL")  // Channel ID to use for tests
-	envUser     string = os.Getenv("DG_USER")     // User ID to use for tests
+	envUser     = os.Getenv("DG_USER")     // User ID to use for tests
-	envAdmin    string = os.Getenv("DG_ADMIN")    // User ID of admin user to use for tests
+	envAdmin    = os.Getenv("DG_ADMIN")    // User ID of admin user to use for tests
 )
 
 func init() {

restapi.go

@@ -25,7 +25,7 @@ import (
 	"time"
 )
 
-// Error returned for unmarshal errors.
+// ErrJSONUnmarshal is returned for JSON Unmarshall errors.
 var ErrJSONUnmarshal = errors.New("json unmarshal")
 
 // Request makes a (GET/POST/...) Requests to Discord REST API.
@@ -69,10 +69,15 @@ func (s *Session) Request(method, urlStr string, data interface{}) (response []b
 	client := &http.Client{Timeout: (20 * time.Second)}
 
 	resp, err := client.Do(req)
-	defer resp.Body.Close()
 	if err != nil {
 		return
 	}
+	defer func() {
+		err := resp.Body.Close()
+		if err != nil {
+			fmt.Println("error closing resp body")
+		}
+	}()
 
 	response, err = ioutil.ReadAll(resp.Body)
 	if err != nil {

state.go

@@ -12,9 +12,13 @@
 
 package discordgo
 
-import "errors"
+import (
+	"errors"
+	"fmt"
+)
 
-var nilError error = errors.New("State not instantiated, please use discordgo.New() or assign Session.State.")
+// ErrNilState is returned when the state is nil.
+var ErrNilState = errors.New("State not instantiated, please use discordgo.New() or assign Session.State.")
 
 // NewState creates an empty state.
 func NewState() *State {
@@ -29,7 +33,7 @@ func NewState() *State {
 // OnReady takes a Ready event and updates all internal state.
 func (s *State) OnReady(r *Ready) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 	s.Lock()
 	defer s.Unlock()
@@ -42,7 +46,7 @@ func (s *State) OnReady(r *Ready) error {
 // updates it if it already exists.
 func (s *State) GuildAdd(guild *Guild) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 	s.Lock()
 	defer s.Unlock()
@@ -67,7 +71,7 @@ func (s *State) GuildAdd(guild *Guild) error {
 // GuildRemove removes a guild from current world state.
 func (s *State) GuildRemove(guild *Guild) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 	s.Lock()
 	defer s.Unlock()
@@ -88,7 +92,7 @@ func (s *State) GuildRemove(guild *Guild) error {
 //     isInGuild := err == nil
 func (s *State) Guild(guildID string) (*Guild, error) {
 	if s == nil {
-		return nil, nilError
+		return nil, ErrNilState
 	}
 	s.RLock()
 	defer s.RUnlock()
@@ -108,7 +112,7 @@ func (s *State) Guild(guildID string) (*Guild, error) {
 // updates it if it already exists.
 func (s *State) MemberAdd(member *Member) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 
 	guild, err := s.Guild(member.GuildID)
@@ -133,7 +137,7 @@ func (s *State) MemberAdd(member *Member) error {
 // MemberRemove removes a member from current world state.
 func (s *State) MemberRemove(member *Member) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 
 	guild, err := s.Guild(member.GuildID)
@@ -157,7 +161,7 @@ func (s *State) MemberRemove(member *Member) error {
 // Member gets a member by ID from a guild.
 func (s *State) Member(guildID, userID string) (*Member, error) {
 	if s == nil {
-		return nil, nilError
+		return nil, ErrNilState
 	}
 
 	guild, err := s.Guild(guildID)
@@ -183,7 +187,7 @@ func (s *State) Member(guildID, userID string) (*Member, error) {
 // a guild.
 func (s *State) ChannelAdd(channel *Channel) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 
 	if channel.IsPrivate {
@@ -229,7 +233,7 @@ func (s *State) ChannelAdd(channel *Channel) error {
 // ChannelRemove removes a channel from current world state.
 func (s *State) ChannelRemove(channel *Channel) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 
 	if channel.IsPrivate {
@@ -265,7 +269,7 @@ func (s *State) ChannelRemove(channel *Channel) error {
 // GuildChannel gets a channel by ID from a guild.
 func (s *State) GuildChannel(guildID, channelID string) (*Channel, error) {
 	if s == nil {
-		return nil, nilError
+		return nil, ErrNilState
 	}
 
 	guild, err := s.Guild(guildID)
@@ -288,7 +292,7 @@ func (s *State) GuildChannel(guildID, channelID string) (*Channel, error) {
 // PrivateChannel gets a private channel by ID.
 func (s *State) PrivateChannel(channelID string) (*Channel, error) {
 	if s == nil {
-		return nil, nilError
+		return nil, ErrNilState
 	}
 	s.RLock()
 	defer s.RUnlock()
@@ -305,7 +309,7 @@ func (s *State) PrivateChannel(channelID string) (*Channel, error) {
 // Channel gets a channel by ID, it will look in all guilds an private channels.
 func (s *State) Channel(channelID string) (*Channel, error) {
 	if s == nil {
-		return nil, nilError
+		return nil, ErrNilState
 	}
 
 	c, err := s.PrivateChannel(channelID)
@@ -326,7 +330,7 @@ func (s *State) Channel(channelID string) (*Channel, error) {
 // Emoji returns an emoji for a guild and emoji id.
 func (s *State) Emoji(guildID, emojiID string) (*Emoji, error) {
 	if s == nil {
-		return nil, nilError
+		return nil, ErrNilState
 	}
 
 	guild, err := s.Guild(guildID)
@@ -349,7 +353,7 @@ func (s *State) Emoji(guildID, emojiID string) (*Emoji, error) {
 // EmojiAdd adds an emoji to the current world state.
 func (s *State) EmojiAdd(guildID string, emoji *Emoji) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 
 	guild, err := s.Guild(guildID)
@@ -386,7 +390,7 @@ func (s *State) EmojisAdd(guildID string, emojis []*Emoji) error {
 // Messages are kept in state up to s.MaxMessageCount
 func (s *State) MessageAdd(message *Message) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 
 	c, err := s.Channel(message.ChannelID)
@@ -410,7 +414,10 @@ func (s *State) MessageAdd(message *Message) error {
 	if len(c.Messages) > s.MaxMessageCount {
 		s.Unlock()
 		for len(c.Messages) > s.MaxMessageCount {
-			s.MessageRemove(c.Messages[0])
+			err := s.MessageRemove(c.Messages[0])
+			if err != nil {
+				fmt.Println("message remove error: ", err)
+			}
 		}
 		s.Lock()
 	}
@@ -420,7 +427,7 @@ func (s *State) MessageAdd(message *Message) error {
 // MessageRemove removes a message from the world state.
 func (s *State) MessageRemove(message *Message) error {
 	if s == nil {
-		return nilError
+		return ErrNilState
 	}
 	c, err := s.Channel(message.ChannelID)
 	if err != nil {
@@ -443,7 +450,7 @@ func (s *State) MessageRemove(message *Message) error {
 // Message gets a message by channel and message ID.
 func (s *State) Message(channelID, messageID string) (*Message, error) {
 	if s == nil {
-		return nil, nilError
+		return nil, ErrNilState
 	}
 	c, err := s.Channel(channelID)
 	if err != nil {

structs.go

@@ -151,6 +151,7 @@ type PermissionOverwrite struct {
 	Allow int    `json:"allow"`
 }
 
+// Emoji struct holds data related to Emoji's
 type Emoji struct {
 	Roles         []string `json:"roles"`
 	RequireColons bool     `json:"require_colons"`
@@ -212,6 +213,7 @@ type Presence struct {
 	Game   *Game  `json:"game"`
 }
 
+// A Game struct holds the name of the "playing .." game for a user
 type Game struct {
 	Name string `json:"name"`
 }
@@ -277,6 +279,8 @@ type Ready struct {
 	PrivateChannels   []*Channel    `json:"private_channels"`
 	Guilds            []*Guild      `json:"guilds"`
 }
+
+// A RateLimit struct holds information related to a specific rate limit.
 type RateLimit struct {
 	Bucket     string        `json:"bucket"`
 	Message    string        `json:"message"`

voice.go

@@ -112,11 +112,17 @@ func (v *Voice) Open() (err error) {
 func (v *Voice) Close() {
 
 	if v.UDPConn != nil {
-		v.UDPConn.Close()
+		err := v.UDPConn.Close()
+		if err != nil {
+			fmt.Println("error closing udp connection: ", err)
+		}
 	}
 
 	if v.wsConn != nil {
-		v.wsConn.Close()
+		err := v.wsConn.Close()
+		if err != nil {
+			fmt.Println("error closing websocket connection: ", err)
+		}
 	}
 }
 
@@ -363,7 +369,7 @@ func (v *Voice) udpOpen() (err error) {
 func (v *Voice) udpKeepAlive(i time.Duration) {
 
 	var err error
-	var sequence uint64 = 0
+	var sequence uint64
 
 	packet := make([]byte, 8)
 
@@ -403,8 +409,8 @@ func (v *Voice) opusSender(opus <-chan []byte, rate, size int) {
 	v.Ready = true
 	defer func() { v.Ready = false }()
 
-	var sequence uint16 = 0
+	var sequence uint16
-	var timestamp uint32 = 0
+	var timestamp uint32
 	udpHeader := make([]byte, 12)
 
 	// build the parts that don't change in the udpHeader
@@ -432,12 +438,16 @@ func (v *Voice) opusSender(opus <-chan []byte, rate, size int) {
 		// block here until we're exactly at the right time :)
 		// Then send rtp audio packet to Discord over UDP
 		<-ticker.C
-		v.UDPConn.Write(sendbuf)
+		_, err := v.UDPConn.Write(sendbuf)
+
+		if err != nil {
+			fmt.Println("error writing to udp connection: ", err)
+		}
 
 		if (sequence) == 0xFFFF {
 			sequence = 0
 		} else {
-			sequence += 1
+			sequence++
 		}
 
 		if (timestamp + uint32(size)) >= 0xFFFFFFFF {

wsapi.go

@@ -134,7 +134,10 @@ func (s *Session) listen(wsConn *websocket.Conn, listening <-chan interface{}) {
 			if sameConnection {
 				// There has been an error reading, Close() the websocket so that
 				// OnDisconnect is fired.
-				s.Close()
+				err := s.Close()
+				if err != nil {
+					fmt.Println("error closing session connection: ", err)
+				}
 
 				// Attempt to reconnect, with expenonential backoff up to 10 minutes.
 				if s.ShouldReconnectOnError {
@@ -262,7 +265,8 @@ func unmarshalEvent(event *Event, i interface{}) (err error) {
 // broken up into smaller functions to be more idiomatic Go.
 // Events will be handled by any implemented handler in Session.
 // All unhandled events will then be handled by OnEvent.
-func (s *Session) event(messageType int, message []byte) (err error) {
+func (s *Session) event(messageType int, message []byte) {
+	var err error
 	var reader io.Reader
 	reader = bytes.NewBuffer(message)
 
@@ -270,9 +274,14 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		z, err1 := zlib.NewReader(reader)
 		if err1 != nil {
 			fmt.Println(err1)
-			return err1
+			return
 		}
-		defer z.Close()
+		defer func() {
+			err := z.Close()
+			if err != nil {
+				fmt.Println("error closing zlib:", err)
+			}
+		}()
 		reader = z
 	}
 
@@ -293,7 +302,11 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		if err = unmarshalEvent(e, &st); err == nil {
 			go s.heartbeat(s.wsConn, s.listening, st.HeartbeatInterval)
 			if s.StateEnabled {
-				s.State.OnReady(st)
+				err := s.State.OnReady(st)
+				if err != nil {
+					fmt.Println("error: ", err)
+				}
+
 			}
 			if s.OnReady != nil {
 				s.OnReady(s, st)
@@ -353,7 +366,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Message
 		if err = unmarshalEvent(e, &st); err == nil {
 			if stateEnabled {
-				s.State.MessageAdd(st)
+				err := s.State.MessageAdd(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnMessageCreate != nil {
 				s.OnMessageCreate(s, st)
@@ -370,7 +386,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Message
 		if err = unmarshalEvent(e, &st); err == nil {
 			if stateEnabled {
-				s.State.MessageAdd(st)
+				err := s.State.MessageAdd(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnMessageUpdate != nil {
 				s.OnMessageUpdate(s, st)
@@ -385,7 +404,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Message
 		if err = unmarshalEvent(e, &st); err == nil {
 			if stateEnabled {
-				s.State.MessageRemove(st)
+				err := s.State.MessageRemove(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnMessageDelete != nil {
 				s.OnMessageDelete(s, st)
@@ -407,7 +429,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Channel
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.ChannelAdd(st)
+				err := s.State.ChannelAdd(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnChannelCreate != nil {
 				s.OnChannelCreate(s, st)
@@ -423,7 +448,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Channel
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.ChannelAdd(st)
+				err := s.State.ChannelAdd(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnChannelUpdate != nil {
 				s.OnChannelUpdate(s, st)
@@ -439,7 +467,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Channel
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.ChannelRemove(st)
+				err := s.State.ChannelRemove(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnChannelDelete != nil {
 				s.OnChannelDelete(s, st)
@@ -455,7 +486,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Guild
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.GuildAdd(st)
+				err := s.State.GuildAdd(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnGuildCreate != nil {
 				s.OnGuildCreate(s, st)
@@ -471,7 +505,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Guild
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.GuildAdd(st)
+				err := s.State.GuildAdd(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnGuildCreate != nil {
 				s.OnGuildUpdate(s, st)
@@ -487,7 +524,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Guild
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.GuildRemove(st)
+				err := s.State.GuildRemove(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnGuildDelete != nil {
 				s.OnGuildDelete(s, st)
@@ -503,7 +543,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Member
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.MemberAdd(st)
+				err := s.State.MemberAdd(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnGuildMemberAdd != nil {
 				s.OnGuildMemberAdd(s, st)
@@ -519,7 +562,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Member
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.MemberRemove(st)
+				err := s.State.MemberRemove(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnGuildMemberRemove != nil {
 				s.OnGuildMemberRemove(s, st)
@@ -535,7 +581,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *Member
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.MemberAdd(st)
+				err := s.State.MemberAdd(st)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnGuildMemberUpdate != nil {
 				s.OnGuildMemberUpdate(s, st)
@@ -599,7 +648,10 @@ func (s *Session) event(messageType int, message []byte) (err error) {
 		var st *GuildEmojisUpdate
 		if err = unmarshalEvent(e, &st); err == nil {
 			if s.StateEnabled {
-				s.State.EmojisAdd(st.GuildID, st.Emojis)
+				err := s.State.EmojisAdd(st.GuildID, st.Emojis)
+				if err != nil {
+					fmt.Println("error :", err)
+				}
 			}
 			if s.OnGuildEmojisUpdate != nil {
 				s.OnGuildEmojisUpdate(s, st)