| package irc |
| |
| import ( |
| "strconv" |
| "strings" |
| "time" |
| ) |
| |
| // Register a callback to a connection and event code. A callback is a function |
| // which takes only an Event pointer as parameter. Valid event codes are all |
| // IRC/CTCP commands and error/response codes. This function returns the ID of |
| // the registered callback for later management. |
| func (irc *Connection) AddCallback(eventcode string, callback func(*Event)) int { |
| eventcode = strings.ToUpper(eventcode) |
| id := 0 |
| |
| irc.eventsMutex.Lock() |
| _, ok := irc.events[eventcode] |
| if !ok { |
| irc.events[eventcode] = make(map[int]func(*Event)) |
| id = 0 |
| } else { |
| id = len(irc.events[eventcode]) |
| } |
| irc.events[eventcode][id] = callback |
| irc.eventsMutex.Unlock() |
| return id |
| } |
| |
| // Remove callback i (ID) from the given event code. This functions returns |
| // true upon success, false if any error occurs. |
| func (irc *Connection) RemoveCallback(eventcode string, i int) bool { |
| eventcode = strings.ToUpper(eventcode) |
| |
| irc.eventsMutex.Lock() |
| event, ok := irc.events[eventcode] |
| if ok { |
| if _, ok := event[i]; ok { |
| delete(irc.events[eventcode], i) |
| irc.eventsMutex.Unlock() |
| return true |
| } |
| irc.Log.Printf("Event found, but no callback found at id %d\n", i) |
| irc.eventsMutex.Unlock() |
| return false |
| } |
| |
| irc.eventsMutex.Unlock() |
| irc.Log.Println("Event not found") |
| return false |
| } |
| |
| // Remove all callbacks from a given event code. It returns true |
| // if given event code is found and cleared. |
| func (irc *Connection) ClearCallback(eventcode string) bool { |
| eventcode = strings.ToUpper(eventcode) |
| |
| irc.eventsMutex.Lock() |
| _, ok := irc.events[eventcode] |
| if ok { |
| irc.events[eventcode] = make(map[int]func(*Event)) |
| irc.eventsMutex.Unlock() |
| return true |
| } |
| irc.eventsMutex.Unlock() |
| |
| irc.Log.Println("Event not found") |
| return false |
| } |
| |
| // Replace callback i (ID) associated with a given event code with a new callback function. |
| func (irc *Connection) ReplaceCallback(eventcode string, i int, callback func(*Event)) { |
| eventcode = strings.ToUpper(eventcode) |
| |
| irc.eventsMutex.Lock() |
| event, ok := irc.events[eventcode] |
| irc.eventsMutex.Unlock() |
| if ok { |
| if _, ok := event[i]; ok { |
| event[i] = callback |
| return |
| } |
| irc.Log.Printf("Event found, but no callback found at id %d\n", i) |
| } |
| irc.Log.Printf("Event not found. Use AddCallBack\n") |
| } |
| |
| // Execute all callbacks associated with a given event. |
| func (irc *Connection) RunCallbacks(event *Event) { |
| msg := event.Message() |
| if event.Code == "PRIVMSG" && len(msg) > 2 && msg[0] == '\x01' { |
| event.Code = "CTCP" //Unknown CTCP |
| |
| if i := strings.LastIndex(msg, "\x01"); i > 0 { |
| msg = msg[1:i] |
| } else { |
| irc.Log.Printf("Invalid CTCP Message: %s\n", strconv.Quote(msg)) |
| return |
| } |
| |
| if msg == "VERSION" { |
| event.Code = "CTCP_VERSION" |
| |
| } else if msg == "TIME" { |
| event.Code = "CTCP_TIME" |
| |
| } else if strings.HasPrefix(msg, "PING") { |
| event.Code = "CTCP_PING" |
| |
| } else if msg == "USERINFO" { |
| event.Code = "CTCP_USERINFO" |
| |
| } else if msg == "CLIENTINFO" { |
| event.Code = "CTCP_CLIENTINFO" |
| |
| } else if strings.HasPrefix(msg, "ACTION") { |
| event.Code = "CTCP_ACTION" |
| if len(msg) > 6 { |
| msg = msg[7:] |
| } else { |
| msg = "" |
| } |
| } |
| |
| event.Arguments[len(event.Arguments)-1] = msg |
| } |
| |
| irc.eventsMutex.Lock() |
| callbacks, ok := irc.events[event.Code] |
| irc.eventsMutex.Unlock() |
| if ok { |
| if irc.VerboseCallbackHandler { |
| irc.Log.Printf("%v (%v) >> %#v\n", event.Code, len(callbacks), event) |
| } |
| |
| for _, callback := range callbacks { |
| callback(event) |
| } |
| } else if irc.VerboseCallbackHandler { |
| irc.Log.Printf("%v (0) >> %#v\n", event.Code, event) |
| } |
| |
| irc.eventsMutex.Lock() |
| allcallbacks, ok := irc.events["*"] |
| irc.eventsMutex.Unlock() |
| if ok { |
| if irc.VerboseCallbackHandler { |
| irc.Log.Printf("%v (0) >> %#v\n", event.Code, event) |
| } |
| |
| for _, callback := range allcallbacks { |
| callback(event) |
| } |
| } |
| } |
| |
| // Set up some initial callbacks to handle the IRC/CTCP protocol. |
| func (irc *Connection) setupCallbacks() { |
| irc.events = make(map[string]map[int]func(*Event)) |
| |
| //Handle ping events |
| irc.AddCallback("PING", func(e *Event) { irc.SendRaw("PONG :" + e.Message()) }) |
| |
| //Version handler |
| irc.AddCallback("CTCP_VERSION", func(e *Event) { |
| irc.SendRawf("NOTICE %s :\x01VERSION %s\x01", e.Nick, irc.Version) |
| }) |
| |
| irc.AddCallback("CTCP_USERINFO", func(e *Event) { |
| irc.SendRawf("NOTICE %s :\x01USERINFO %s\x01", e.Nick, irc.user) |
| }) |
| |
| irc.AddCallback("CTCP_CLIENTINFO", func(e *Event) { |
| irc.SendRawf("NOTICE %s :\x01CLIENTINFO PING VERSION TIME USERINFO CLIENTINFO\x01", e.Nick) |
| }) |
| |
| irc.AddCallback("CTCP_TIME", func(e *Event) { |
| ltime := time.Now() |
| irc.SendRawf("NOTICE %s :\x01TIME %s\x01", e.Nick, ltime.String()) |
| }) |
| |
| irc.AddCallback("CTCP_PING", func(e *Event) { irc.SendRawf("NOTICE %s :\x01%s\x01", e.Nick, e.Message()) }) |
| |
| // 437: ERR_UNAVAILRESOURCE "<nick/channel> :Nick/channel is temporarily unavailable" |
| // Add a _ to current nick. If irc.nickcurrent is empty this cannot |
| // work. It has to be set somewhere first in case the nick is already |
| // taken or unavailable from the beginning. |
| irc.AddCallback("437", func(e *Event) { |
| // If irc.nickcurrent hasn't been set yet, set to irc.nick |
| if irc.nickcurrent == "" { |
| irc.nickcurrent = irc.nick |
| } |
| |
| if len(irc.nickcurrent) > 8 { |
| irc.nickcurrent = "_" + irc.nickcurrent |
| } else { |
| irc.nickcurrent = irc.nickcurrent + "_" |
| } |
| irc.SendRawf("NICK %s", irc.nickcurrent) |
| }) |
| |
| // 433: ERR_NICKNAMEINUSE "<nick> :Nickname is already in use" |
| // Add a _ to current nick. |
| irc.AddCallback("433", func(e *Event) { |
| // If irc.nickcurrent hasn't been set yet, set to irc.nick |
| if irc.nickcurrent == "" { |
| irc.nickcurrent = irc.nick |
| } |
| |
| if len(irc.nickcurrent) > 8 { |
| irc.nickcurrent = "_" + irc.nickcurrent |
| } else { |
| irc.nickcurrent = irc.nickcurrent + "_" |
| } |
| irc.SendRawf("NICK %s", irc.nickcurrent) |
| }) |
| |
| irc.AddCallback("PONG", func(e *Event) { |
| ns, _ := strconv.ParseInt(e.Message(), 10, 64) |
| delta := time.Duration(time.Now().UnixNano() - ns) |
| if irc.Debug { |
| irc.Log.Printf("Lag: %.3f s\n", delta.Seconds()) |
| } |
| }) |
| |
| // NICK Define a nickname. |
| // Set irc.nickcurrent to the new nick actually used in this connection. |
| irc.AddCallback("NICK", func(e *Event) { |
| if e.Nick == irc.nick { |
| irc.nickcurrent = e.Message() |
| } |
| }) |
| |
| // 1: RPL_WELCOME "Welcome to the Internet Relay Network <nick>!<user>@<host>" |
| // Set irc.nickcurrent to the actually used nick in this connection. |
| irc.AddCallback("001", func(e *Event) { |
| irc.Lock() |
| irc.nickcurrent = e.Arguments[0] |
| irc.Unlock() |
| }) |
| } |