Add telnet file with support to send and receive text from Merc MUD

[midgaard_bot.git] / sessions.go

diff --git a/sessions.go b/sessions.go
index 7dd2df3c1b448d7f0e22742451978c23585d0d18..17fa54555dcc062ec2a449e6f9700f4162070ec0 100644 (file)
--- a/sessions.go
+++ b/sessions.go
@@ -1,10 +1,28 @@
+/*
+midgaard_bot, a Telegram bot which sets a bridge to Midgaard Merc MUD
+Copyright (C) 2017 by Javier Sancho Fernandez <jsf at jsancho dot org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 package main
 
 import (
        "context"
-       "log"
 
        "github.com/go-telegram-bot-api/telegram-bot-api"
+       "github.com/reiver/go-telnet"
 )
 
 type Session struct {
@@ -13,10 +31,12 @@ type Session struct {
 }
 
 var sessions map[int64]*Session
+var mercHost string
 var sessionsCtx context.Context
 
-func initSessions(ctx context.Context) error {
+func initSessions(host string, ctx context.Context) error {
        sessions = make(map[int64]*Session)
+       mercHost = host
        sessionsCtx = ctx
        return nil
 }
@@ -38,19 +58,31 @@ func newSession(chat *tgbotapi.Chat) *Session {
 
 func startSession(session *Session) {
        ctx, _ := context.WithCancel(sessionsCtx)
+
        go func() {
-               for {
-                       select {
-                       case msg := <-session.Input:
-                               log.Printf("[%s] %s", msg.From.UserName, msg.Text)
-
-                               newMsg := tgbotapi.NewMessage(msg.Chat.ID, msg.Text)
-                               newMsg.ReplyToMessageID = msg.MessageID
-                               sendToTelegram(newMsg)
-                       case <-ctx.Done():
-                               return
-                       }
+               telnetInput, telnetOutput := make(chan string), make(chan string)
+               caller := TelnetCaller{
+                       Input: telnetInput,
+                       Output: telnetOutput,
                }
+
+               go func() {
+                       for {
+                               select {
+                               case msg := <-session.Input:
+                                       if msg.Text != "/start" {
+                                               telnetInput <- msg.Text
+                                       }
+                               case body := <-telnetOutput:
+                                       newMsg := tgbotapi.NewMessage(session.Chat.ID, body)
+                                       sendToTelegram(newMsg)
+                               case <-ctx.Done():
+                                       return
+                               }
+                       }
+               }()
+
+               telnet.DialToAndCall(mercHost, caller)
        }()
 }