abydos.phonetic._nysiis

Complexity

Total Complexity

67

Size/Duplication

Total Lines	255
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
F	NYSIIS.encode()	0	166	66

# -*- coding: utf-8 -*-

# Copyright 2014-2018 by Christopher C. Little.
# This file is part of Abydos.
#
# Abydos is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Abydos is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Abydos. If not, see <http://www.gnu.org/licenses/>.

"""abydos.phonetic._nysiis.

The phonetic._nysiis module implements New York State Identification and
Intelligence System (NYSIIS) phonetic encoding.
"""

from __future__ import unicode_literals

from six.moves import range

from ._phonetic import Phonetic

__all__ = ['NYSIIS', 'nysiis']


class NYSIIS(Phonetic):

The variable __class__ seems to be unused.

    """NYSIIS Code.

    The New York State Identification and Intelligence System algorithm is
    defined in :cite:`Taft:1970`.

    The modified version of this algorithm is described in Appendix B of
    :cite:`Lynch:1977`.
    """

    def encode(self, word, max_length=6, modified=False):

Parameters differ from overridden 'encode' method

        """Return the NYSIIS code for a word.

        Args:
            word (str): The word to transform
            max_length (int): The maximum length (default 6) of the code to
                return
            modified (bool): Indicates whether to use USDA modified NYSIIS

        Returns:
            str: The NYSIIS value

        Examples:
            >>> pe = NYSIIS()
            >>> pe.encode('Christopher')
            'CRASTA'
            >>> pe.encode('Niall')
            'NAL'
            >>> pe.encode('Smith')
            'SNAT'
            >>> pe.encode('Schmidt')
            'SNAD'

            >>> pe.encode('Christopher', max_length=-1)
            'CRASTAFAR'

            >>> pe.encode('Christopher', max_length=8, modified=True)
            'CRASTAFA'
            >>> pe.encode('Niall', max_length=8, modified=True)
            'NAL'
            >>> pe.encode('Smith', max_length=8, modified=True)
            'SNAT'
            >>> pe.encode('Schmidt', max_length=8, modified=True)
            'SNAD'

        """
        # Require a max_length of at least 6
        if max_length > -1:
            max_length = max(6, max_length)

        word = ''.join(c for c in word.upper() if c.isalpha())
        word = word.replace('ß', 'SS')

        # exit early if there are no alphas
        if not word:
            return ''

        original_first_char = word[0]

        if word[:3] == 'MAC':
            word = 'MCC' + word[3:]
        elif word[:2] == 'KN':
            word = 'NN' + word[2:]
        elif word[:1] == 'K':
            word = 'C' + word[1:]
        elif word[:2] in {'PH', 'PF'}:
            word = 'FF' + word[2:]
        elif word[:3] == 'SCH':
            word = 'SSS' + word[3:]
        elif modified:
            if word[:2] == 'WR':
                word = 'RR' + word[2:]
            elif word[:2] == 'RH':
                word = 'RR' + word[2:]
            elif word[:2] == 'DG':
                word = 'GG' + word[2:]
            elif word[:1] in self._uc_v_set:
                word = 'A' + word[1:]

        if modified and word[-1:] in {'S', 'Z'}:
            word = word[:-1]

        if (
            word[-2:] == 'EE'

Wrong hanging indentation before block (add 4 spaces).

            or word[-2:] == 'IE'

Wrong hanging indentation before block (add 4 spaces).

            or (modified and word[-2:] == 'YE')

Wrong hanging indentation before block (add 4 spaces).

        ):
            word = word[:-2] + 'Y'
        elif word[-2:] in {'DT', 'RT', 'RD'}:
            word = word[:-2] + 'D'
        elif word[-2:] in {'NT', 'ND'}:
            word = word[:-2] + ('N' if modified else 'D')
        elif modified:
            if word[-2:] == 'IX':
                word = word[:-2] + 'ICK'
            elif word[-2:] == 'EX':
                word = word[:-2] + 'ECK'
            elif word[-2:] in {'JR', 'SR'}:
                return 'ERROR'

        key = word[:1]

        skip = 0
        for i in range(1, len(word)):
            if i >= len(word):
                continue
            elif skip:
                skip -= 1
                continue
            elif word[i : i + 2] == 'EV':
                word = word[:i] + 'AF' + word[i + 2 :]
                skip = 1
            elif word[i] in self._uc_v_set:
                word = word[:i] + 'A' + word[i + 1 :]
            elif modified and i != len(word) - 1 and word[i] == 'Y':
                word = word[:i] + 'A' + word[i + 1 :]
            elif word[i] == 'Q':
                word = word[:i] + 'G' + word[i + 1 :]
            elif word[i] == 'Z':
                word = word[:i] + 'S' + word[i + 1 :]
            elif word[i] == 'M':
                word = word[:i] + 'N' + word[i + 1 :]
            elif word[i : i + 2] == 'KN':
                word = word[:i] + 'N' + word[i + 2 :]
            elif word[i] == 'K':
                word = word[:i] + 'C' + word[i + 1 :]
            elif modified and i == len(word) - 3 and word[i : i + 3] == 'SCH':
                word = word[:i] + 'SSA'
                skip = 2
            elif word[i : i + 3] == 'SCH':
                word = word[:i] + 'SSS' + word[i + 3 :]
                skip = 2
            elif modified and i == len(word) - 2 and word[i : i + 2] == 'SH':
                word = word[:i] + 'SA'
                skip = 1
            elif word[i : i + 2] == 'SH':
                word = word[:i] + 'SS' + word[i + 2 :]
                skip = 1
            elif word[i : i + 2] == 'PH':
                word = word[:i] + 'FF' + word[i + 2 :]
                skip = 1
            elif modified and word[i : i + 3] == 'GHT':
                word = word[:i] + 'TTT' + word[i + 3 :]
                skip = 2
            elif modified and word[i : i + 2] == 'DG':
                word = word[:i] + 'GG' + word[i + 2 :]
                skip = 1
            elif modified and word[i : i + 2] == 'WR':
                word = word[:i] + 'RR' + word[i + 2 :]
                skip = 1
            elif word[i] == 'H' and (
                word[i - 1] not in self._uc_v_set

Wrong hanging indentation before block (add 4 spaces).

                or word[i + 1 : i + 2] not in self._uc_v_set

Wrong hanging indentation before block (add 4 spaces).

            ):
                word = word[:i] + word[i - 1] + word[i + 1 :]
            elif word[i] == 'W' and word[i - 1] in self._uc_v_set:
                word = word[:i] + word[i - 1] + word[i + 1 :]

            if word[i : i + skip + 1] != key[-1:]:
                key += word[i : i + skip + 1]

        key = self._delete_consecutive_repeats(key)

        if key[-1:] == 'S':
            key = key[:-1]
        if key[-2:] == 'AY':
            key = key[:-2] + 'Y'
        if key[-1:] == 'A':
            key = key[:-1]
        if modified and key[:1] == 'A':
            key = original_first_char + key[1:]

        if max_length > 0:
            key = key[:max_length]

        return key


def nysiis(word, max_length=6, modified=False):
    """Return the NYSIIS code for a word.

    This is a wrapper for :py:meth:`Metaphone.encode`.

    Args:
        word (str): The word to transform
        max_length (int): The maximum length (default 6) of the code to return
        modified (bool): Indicates whether to use USDA modified NYSIIS

    Returns:
        str: The NYSIIS value

    Examples:
        >>> nysiis('Christopher')
        'CRASTA'
        >>> nysiis('Niall')
        'NAL'
        >>> nysiis('Smith')
        'SNAT'
        >>> nysiis('Schmidt')
        'SNAD'

        >>> nysiis('Christopher', max_length=-1)
        'CRASTAFAR'

        >>> nysiis('Christopher', max_length=8, modified=True)
        'CRASTAFA'
        >>> nysiis('Niall', max_length=8, modified=True)
        'NAL'
        >>> nysiis('Smith', max_length=8, modified=True)
        'SNAT'
        >>> nysiis('Schmidt', max_length=8, modified=True)
        'SNAD'

    """
    return NYSIIS().encode(word, max_length, modified)


if __name__ == '__main__':
    import doctest

    doctest.testmod()