X-Git-Url: https://git.jsancho.org/?p=midgaard_bot.git;a=blobdiff_plain;f=sessions.go;h=17fa54555dcc062ec2a449e6f9700f4162070ec0;hp=dad67abcd87b9047877f4e543eaf67d102f1bbd1;hb=refs%2Fheads%2Fmaster;hpb=04dc2e081ed05a8e6cc77596ff0f694073283d82

diff --git a/sessions.go b/sessions.go
index dad67ab..17fa545 100644
--- a/sessions.go
+++ b/sessions.go
@@ -1,10 +1,91 @@
+/*
+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"
+
 	"github.com/go-telegram-bot-api/telegram-bot-api"
+	"github.com/reiver/go-telnet"
 )
 
 type Session struct {
 	Chat *tgbotapi.Chat
-	Msgbox chan tgbotapi.Message
+	Input chan *tgbotapi.Message
+}
+
+var sessions map[int64]*Session
+var mercHost string
+var sessionsCtx context.Context
+
+func initSessions(host string, ctx context.Context) error {
+	sessions = make(map[int64]*Session)
+	mercHost = host
+	sessionsCtx = ctx
+	return nil
+}
+
+func getSession(chat *tgbotapi.Chat) *Session {
+	session, ok := sessions[chat.ID]
+	if !ok {
+		session = newSession(chat)
+	}
+	return session
+}
+
+func newSession(chat *tgbotapi.Chat) *Session {
+	session := Session{chat, make(chan *tgbotapi.Message)}
+	sessions[chat.ID] = &session
+	startSession(&session)
+	return &session
+}
+
+func startSession(session *Session) {
+	ctx, _ := context.WithCancel(sessionsCtx)
+
+	go func() {
+		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)
+	}()
+}
+
+func sendToSession(session *Session, message *tgbotapi.Message) {
+	session.Input <- message
 }