xfix/showdown2irc

// showdown2irc - use Showdown chat with an IRC client
// Copyright (C) 2016 Konrad Borowski
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package main

import (
    "fmt"
    "strings"

    "github.com/xfix/showdown2irc/irc"
    "github.com/xfix/showdown2irc/showdown"
)

var ircCommands = map[string]func(*connection, []string){
    "CAP": func(c *connection, command []string) {
        // Not implemented, does nothing
    },
    "PASS": func(c *connection, command []string) {
        if len(command) < 1 {
            c.needMoreParams("PASS")
        } else if c.userObtained || c.nickObtained {
            c.sendNumeric(irc.ErrAlreadyRegistered)
        } else {
            c.loginData.Password = command[0]
        }
    },
    "NICK": func(c *connection, command []string) {
        if c.userObtained && !c.nickObtained {
            c.continueConnection()
        }
        c.nickObtained = true
    },
    "USER": func(c *connection, command []string) {
        if len(command) < 4 {
            c.needMoreParams("USER")
        }
        c.loginData.Nickname = command[3]
        c.nickname = escapeUser(command[3])
        if !c.userObtained && c.nickObtained {
            c.continueConnection()
        }
        c.userObtained = true
    },
    "OPER": func(c *connection, command []string) {
        // The server doesn't support OPER command, so claim that the current
        // user host doesn't have O-lines, even if that's not a real issue.
        if len(command) < 2 {
            c.needMoreParams("OPER")
        } else {
            c.sendNumeric(irc.ErrNoOperHost)
        }
    },
    "USERHOST": func(c *connection, command []string) {
        for _, arg := range command {
            c.sendNumeric(irc.RplUserhost, escapeUserWithHost(arg))
        }
    },
    "PING": func(c *connection, command []string) {
        args := make([]string, len(command)+2)
        args[0] = "PONG"
        args[1] = serverName
        copy(args[2:], command)
        c.sendGlobal(args...)
    },
    "PRIVMSG": func(c *connection, command []string) {
        message := unescapeUser(command[1])
        const actionPrefix = "\x01ACTION "
        const actionSuffix = "\x01"
        var roomMethod func(*showdown.Room, string)
        pmCommand := ""
        if strings.HasPrefix(message, actionPrefix) && strings.HasSuffix(message, actionSuffix) {
            roomMethod = func(room *showdown.Room, message string) {
                room.SendCommand("me", message)
            }
            message = message[len(actionPrefix) : len(message)-len(actionSuffix)]
            pmCommand = "/me "
        } else {
            roomMethod = func(room *showdown.Room, message string) {
                room.Reply(message)
            }
        }
        if command[0][0] == '#' {
            room := c.showdown.Room(showdown.RoomID(command[0][1:]))
            roomMethod(room, message)
        } else if command[1] != "NickServ" {
            c.showdown.SendGlobalCommand("pm", fmt.Sprintf("%s,%s%s", command[0], pmCommand, message))
        }
    },
    "JOIN": func(c *connection, command []string) {
        for _, room := range strings.Split(command[0], ",") {
            if showdown.ToID(room) == "" {
                room = "lobby"
            }
            if room[0] == '#' {
                room = room[1:]
            }
            c.showdown.SendGlobalCommand("join", room)
        }
    },
    "PART": func(c *connection, command []string) {
        room := c.showdown.Room(showdown.RoomID(command[0][1:]))
        room.SendCommand("part", "")
    },
    "MODE": func(c *connection, command []string) {
        if len(command) == 1 {
            c.sendNumeric(irc.RplChannelModeIs, command[0], "+ntc", "")
        }
    },
    "QUIT": func(c *connection, command []string) {
        c.close()
    },
}