# Copyright (c) 2010 by Stephan Huebner <s.huebnerfun01@gmx.org>
#
# Intended use:
#
# Set ip-setting to the correct external IP whenever one connects to a server
# (so that dcc-sending works)
#
# 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/>.
#
# History:
#    v 0.1 - first public release

from urllib2 import urlopen
from urllib2 import URLError

SCR_NAME    = "setip"
SCR_AUTHOR  = "Stephan Huebner <shuebnerfun01@gmx.org>"
SCR_VERSION = "0.1"
SCR_LICENSE = "GPL3"
SCR_DESC    = "Set xfer-option for external ip"
SCR_COMMAND = "setip"

import_ok = True

bfList = []

try:
	import weechat as w
except:
	print "Script must be run under weechat. http://www.weechat.org"
	import_ok = False

settings = {
}

def errMsg(myMsg):
	w.prnt("", "ERR: " + myMsg)
	return

def alert(myString):
	w.prnt("", myString)
	return

def fn_connected(data, signal, signal_data):
	try:
		ext_ip = urlopen("http://whatismyip.org").read()
		w.command("", "/set xfer.network.own_ip %s" %ext_ip)
	except URLError:
		errMsg("URL/IP could not be retrieved!")
	return w.WEECHAT_RC_OK

def fn_command(data, buffer, args):
	fn_connected(data, buffer, args)
	return w.WEECHAT_RC_OK
	
if __name__ == "__main__" and import_ok:
	if w.register(SCR_NAME, SCR_AUTHOR, SCR_VERSION, SCR_LICENSE,
						SCR_DESC, "", ""):
		# hook to "connected to (any) server"-signal
		w.hook_signal("irc_server_connected", "fn_connected", "")
		w.hook_command( # help-text
			SCR_COMMAND, "",
"""

The script tries to retrieve your external IP from "whatismyip.org". Once
started, it will do so on two occasions:
  1) whenever you have succesfully connected to *any* server (imho, the easiest
     way to make sure that your IP is set correctly after a (possible)
	  disconnection from the internet).
  2) when the script is called itself as a command "/setip".
  
Attention: It seems that the "whatismyip.org" isn't very reliable. You should
check weechats' core-buffer for messages (the script will output there if the
IP had been set or if something went wrong).
""",
			"",
			"", "fn_command", ""
			)