# -*- coding: UTF-8 -*-

from plone.i18n.normalizer.interfaces import INormalizer
from zope.interface import implements
from plone.i18n.normalizer.base import mapUnicode

# German character mapping
#
# Special characters:
#     8222: German left double quotation mark
#     8220: German right double quotation mark
#     8218: German left single quotation mark
#     8216: German right single quotation mark
#     8211: en dash '-'
#      167: paragraph character
#     8364: Euro sign

mapping = {
    196 : 'AE', 198 : 'AE', 214 : 'OE', 220 : 'UE', 223 : 'ss', 224 : 'a',
    228 : 'ae', 230 : 'ae', 246 : 'oe', 252 : 'ue',
    8222: '-' , 8220: '-' , 8218: '-' , 8216: '-',
    8211: '-' , 167 : '-' ,
    8364: 'euro'
}

class Normalizer(object):
    """
    This normalizer can normalize any unicode string and returns a version
    that only contains of ASCII characters.

    Let's make sure that this implementation actually fulfills the API.

      >>> from zope.interface.verify import verifyClass
      >>> verifyClass(INormalizer, Normalizer)
      True

      >>> norm = Normalizer()
      >>> norm.normalize(u'\xe4')
      'ae'
    """
    implements(INormalizer)

    def normalize(self, text, locale=None, max_length=None):
        """
        Returns a normalized text. text has to be a unicode string.
        """
        return mapUnicode(text, mapping=mapping)

normalizer = Normalizer()