#!/usr/bin/env python
# This module attempts to capture URLs from any interaction on the mud.
# It keeps a list of the n most recent (specified by capture_limit below)
# URLs.
#
# Beware that there are problem security holes in this program.  It attempts
# to filter out some nastiness but be warned.
#
# /url -h               Print help
# /url list             List captured URLs
# /url launch [index]   Launch the most recent URL, or that
#                       specified by index.
#
# Written by Alexander Else.  http://www.else.id.au

import GnomeMud, re
import pygtk
import gtk
import os

# Limit the url list to the 10 most recently captured urls.
capture_limit = 10

urlre = re.compile("((?xi)(?:(?:ht|f)tp://|)[\w\d\-\.]+\.(?:com|net|org|cc|edu|au|uk)(?:\S+|))")
last_url = None
captured_url_list = []
recmd = "/url"
launchre = re.compile(recmd);

def launch_url(c, url):
    c.write("Launching %s\n" % url)
    os.popen("%s %s &" % ("firefox", url))

def handle_url_cmd(c, s):
    global last_url
    global captured_url_list
    global recmd

    if re.match("%s\s+-h" % recmd, s):
        c.write("/url list\n")
        c.write("/url launch [num]\n")

    if re.match("%s\s+list" % recmd, s):
        i = 0
        for url in captured_url_list:
            c.write("%2d %s\n" % (i, url))
            i = i + 1

    m = re.search("%s\s+(launch(?:\s+(\d+))?)" % recmd, s)
    if m:
        num = 0
        if m.group(2) != None:
            num = int(m.group(2))
            if len(captured_url_list) < num:
                c.write("No such URL index\n")
            else:
                launch_url(c, captured_url_list[num])
        else:
            launch_url(c, captured_url_list[num])

    # effectively gag our command from hitting the mud
    s = ""
    return s


def input(c, s):
    m = urlre.search(s)
    if m:
        global last_url
        global captured_url_list
        global capture_limit

        new_url = m.group(1)
        badchars = re.search("[\"`]", new_url)
        if not badchars and new_url != last_url:
            last_url = new_url
            captured_url_list = [ new_url ] + captured_url_list[: (capture_limit - 1)]
            s = s + "\n(captured " + new_url + ")\n"

    return s


def output(c, s):
    m = launchre.match(s)
    if m:
        s = handle_url_cmd(c, s)

    return s

c = GnomeMud.connection()
c.write("Registering URL capture callbacks... ")
GnomeMud.register_input_handler(input)
GnomeMud.register_output_handler(output)
c.write("done\n")