# -*- encoding: utf-8 -*-

from django import template
from django.utils.html import conditional_escape
from django.utils.safestring import mark_safe
import re

register = template.Library()

@register.filter
def fancyurlize(value, arg):
    length = int(arg)

    text = value
    for char in (u'%', u'?'):
        arr = value.split(char)
        if len(arr) > 1:
            text = arr[0]

    if len(text) > length:
        arr = re.split(r'(?<!/)/(?!/)', text)
        if len(arr) > 2:
            text = u'/'.join((arr[0], u'...', arr[-1]))

    if len(text) > 0 and text[-1] != u'/':
        text = u''.join((text, u'/'))

    return_value = u'<a href="%s" target="_blank">%s</a>' % (
        conditional_escape(value),
        conditional_escape(text),
    )
    return mark_safe(return_value)

fancyurlize.is_safe = True