mirror of https://github.com/ergochat/ergo.git
127 lines
3.0 KiB
Go
127 lines
3.0 KiB
Go
// Copyright (c) 2016- Daniel Oaks <daniel@danieloaks.net>
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// released under the MIT license
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package irc
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import (
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"fmt"
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"net"
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"strings"
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"github.com/DanielOaks/girc-go/ircmsg"
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)
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// ClientSocket listens to a socket using the IRC protocol, processes events,
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// and also sends IRC lines out of that socket.
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type ClientSocket struct {
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receiveLines chan string
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ReceiveEvents chan Message
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SendLines chan string
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socket Socket
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client Client
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}
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// NewClientSocket returns a new ClientSocket.
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func NewClientSocket(conn net.Conn, client Client) ClientSocket {
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return ClientSocket{
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receiveLines: make(chan string),
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ReceiveEvents: make(chan Message),
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SendLines: make(chan string),
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socket: NewSocket(conn),
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client: client,
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}
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}
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// Start creates and starts running the necessary event loops.
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func (cs *ClientSocket) Start() {
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go cs.RunEvents()
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go cs.RunSocketSender()
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go cs.RunSocketListener()
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}
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// RunEvents handles received IRC lines and processes incoming commands.
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func (cs *ClientSocket) RunEvents() {
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var exiting bool
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var line string
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for !exiting {
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select {
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case line = <-cs.receiveLines:
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if line != "" {
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fmt.Println("<- ", strings.TrimRight(line, "\r\n"))
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exiting = cs.processIncomingLine(line)
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}
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}
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}
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// empty the receiveLines queue
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cs.socket.Close()
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select {
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case <-cs.receiveLines:
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// empty
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default:
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// empty
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}
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}
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// RunSocketSender sends lines to the IRC socket.
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func (cs *ClientSocket) RunSocketSender() {
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var err error
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var line string
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for {
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line = <-cs.SendLines
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err = cs.socket.Write(line)
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fmt.Println(" ->", strings.TrimRight(line, "\r\n"))
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if err != nil {
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break
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}
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}
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}
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// RunSocketListener receives lines from the IRC socket.
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func (cs *ClientSocket) RunSocketListener() {
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var errConn error
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var line string
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for {
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line, errConn = cs.socket.Read()
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cs.receiveLines <- line
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if errConn != nil {
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break
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}
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}
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if !cs.socket.Closed {
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cs.Send(nil, "", "ERROR", "Closing connection")
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cs.socket.Close()
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}
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}
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// Send sends an IRC line to the listener.
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func (cs *ClientSocket) Send(tags *map[string]ircmsg.TagValue, prefix string, command string, params ...string) error {
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ircmsg := ircmsg.MakeMessage(tags, prefix, command, params...)
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line, err := ircmsg.Line()
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if err != nil {
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return err
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}
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cs.SendLines <- line
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return nil
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}
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// processIncomingLine splits and handles the given command line.
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// Returns true if client is exiting (sent a QUIT command, etc).
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func (cs *ClientSocket) processIncomingLine(line string) bool {
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msg, err := ircmsg.ParseLine(line)
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if err != nil {
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cs.Send(nil, "", "ERROR", "Your client sent a malformed line")
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return true
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}
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command, canBeParsed := Commands[msg.Command]
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if canBeParsed {
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return command.Run(cs.client.server, &cs.client, msg)
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}
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//TODO(dan): This is an error+disconnect purely for reasons of testing.
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// Later it may be downgraded to not-that-bad.
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cs.Send(nil, "", "ERROR", fmt.Sprintf("Your client sent a command that could not be parsed [%s]", msg.Command))
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return true
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}
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