# -*- coding: utf-8 -*-
#Author: Igor Támara igor@tamarapatino.org
#Date: 12/04/2006
#No warranties.
"""
      MoinMoin - Random Banner
   Purpose : The purpose of this script is to link to another
   place with a banner, like a webring

   Inputs : Receives an URL of a csv file separated with semicolon
   with three fields :
   name of site;url site;url banner

     The second argument is the width of the banner
     The third argument is the height of the banner

   Output:  Shows the banner, when you move over the banner it shows
   the legend and finally when you click you are directed to the site.

   Examples :
   ||<tablestyle="text-align:center;width:100%"><<RandomBanner(http://servidor.slec.net/~igotam/anillo.txt)>>||
   will show any of the records on the file as a banner linking to the site.

   <<RandomBanner(http://servidor.slec.net/~igotam/anillo.txt,200,20)>>
   will show a random banner on 200x20 size, linking.

A file containing the following lines worked for me.

Slec;http://www.slec.net;http://servidor.slec.net/~igotam/images/banner.gif
Gleducar;http://www.gleducar.org.ar;http://servidor.slec.net/~igotam/images/gledubanner.gif
Educalibre;http://www.educalibre.cl;http://servidor.slec.net/~igotam/images/banner.gif
Structio;http://structio.sourceforge.net;http://structio.sourceforge.net/images/bannerstructio.gif
Flisol;http://www.installfest.info;http://www.linuxpreview.org/images/banners/banner-flisol2006-p1latin.gif


   Side Notes :
   Alternate ways of doing this would include using ImageLink macro with
   RandomQuote :) .  I remembered that when I have just finished doing this.
   RandomBanner DOES NOT rely on those macros.

   Please check that your file is well constructed.

   Comments :
   Are welcome
"""

import urllib
import random


def parseargs(args):
    arg_list = args.split(",")
    width = 468
    height = 60
    works = 0
    if len(arg_list) == 1:
        txtfile = arg_list[0]
        works = 1
    elif len(arg_list) == 3:
        txtfile = arg_list[0]
        width = arg_list[1]
        height = arg_list[2]
        works = 1
    return txtfile, width, height, works


def mypict(txtfile, width, height):
    stre = urllib.urlopen(txtfile)
    lines = stre.readlines()
    text, dest, imageurl = random.choice(lines).split(';')
    if imageurl[-1] == '\n':
        imageurl = imageurl[:-1]
    return '<a href="%s"><img src="%s" alt="%s %s" title="%s %s" width="%d" height="%d"></a>' % (dest, imageurl, text, dest, text, dest, width, height)


def execute(macro, args):
    fine = 1
    res = ""
    if len(args) > 10:
        txtfile, width, height, fine = parseargs(args)
    if fine:
        res = mypict(txtfile, width, height)
    return macro.formatter.rawHTML(res)