# -*- coding: utf-8 -*-
#
# Copyright IRI (c) 2013
#
# contact@iri.centrepompidou.fr
#
# This software is governed by the CeCILL-B license under French law and
# abiding by the rules of distribution of free software.  You can  use, 
# modify and/ or redistribute the software under the terms of the CeCILL-B
# license as circulated by CEA, CNRS and INRIA at the following URL
# "http://www.cecill.info". 
#
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# modify and redistribute granted by the license, users are provided only
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# economic rights,  and the successive licensors  have only  limited
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# therefore means  that it is reserved for developers  and  experienced
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from django.template import Library
from django.template.defaultfilters import stringfilter
from django.utils.safestring import SafeData

from p4l.utils import strip_accents


register = Library()


@register.filter(is_safe=True, needs_autoescape=True)
@stringfilter
def reduce(value, nbs, autoescape=None):  # @ReservedAssignment
    """
    Replace a string by "..." and its last characters. Usefull to display strings where end matters
    """
    autoescape = autoescape and not isinstance(value, SafeData)
    # nbs is "nb_char_start,nb_char_end"
    a = nbs.split(",")
    nb_start = int(a[0])
    nb_end = int(a[1])
    return value[:nb_start] + "..." + value[-nb_end:]

@register.filter(is_safe=True, name="strip_accents")
@stringfilter
def strip_accents_filter(value):
    """
    Strip accent from string
    """
    return strip_accents(value)