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#! /usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2009 Santhosh Thottingal <santhosh.thottingal@gmail.com>
# http://www.smc.org.in
#
# This program 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.
#
# This program 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 Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# If you find any bugs or have any suggestions email: santhosh.thottingal@gmail.com
# URL: http://www.smc.org.in
import charmap
import sys
import re
from common import *
class Soundex(SilpaModule):
def soundexDigit(self,char):
index=0
cm=charmap.charmap
lang= charmap.language(char)
try:
if lang == "en_US":
return cm["soundex_en"][cm[lang].index(char)]
else:
return cm["soundex"][cm[lang].index(char)]
except:
'''In case of any exception- Mostly because of character not found in charmap'''
return 0
return None
def soundex(self,name, len=5, indic=False):
""" soundex module conforming to Knuth's algorithm
implementation 2000-12-24 by Gregory Jorgensen
public domain
"""
sndx =''
fc = ''
# translate alpha chars in name to soundex digits
for c in name.lower():
if not fc: fc = c # remember first letter
d = str(self.soundexDigit(c))
# duplicate consecutive soundex digits are skipped
if not sndx or (d != sndx[-1]):
sndx += d
# replace first digit with first alpha character
if not indic: sndx = fc + sndx[1:]
# remove all 0s from the soundex code
sndx = sndx.replace('0','')
# return soundex code padded to len characters
return (sndx + (len * '0'))[:len]
def compare(self,string1, string2, indic=True):
if indic:
if charmap.charCompare( string1[0] , string2[0]) >=0 :
return self.soundex(string1, indic=True)==self.soundex(string2, indic=True)
else:
return self.soundex(string1, indic=False)==self.soundex(string2, indic=False)
def process(self,form):
response = """
<h2>Soundex</h2></hr>
<p>'Sounds like' search across Indian Languages.
</p>
<p>Enter the text for searching in the below text area. You can enter the text in say, Hindi and search a Malayalam word in that. If the pronunciation of the search key is similar to any word in the text, it will be highlighted.
All Indian Languages and English are supported. <a href="http://en.wikipedia.org/wiki/Soundex">More about soundex</a></p>
<form action="" method="post">
<textarea cols='100' rows='25' name='input_text' id='input_text'>%s</textarea>
<br/>
<p align="center">
Search :<input type="text" name="search_key" value="%s"/>
</br>
<input type="hidden" name="action" value="Soundex">
<input type="submit" id="SoundexSearch" value="Search" style="width:12em;"/>
</p>
</form>
"""
if(form.has_key('input_text')):
text = action=form['input_text'].value .decode('utf-8')
if(form.has_key('search_key')):
key =form['search_key'].value .decode('utf-8')
response=response % (text,key)
words=text.split(" ")
response = response+"<h2>Search Results</h2></hr>"
else:
response = response+ "Enter a string to search."
return response % (text,"", algorithm)
for word in words:
word=word.strip()
if(word>""):
if word[0]>'0' and word[0]<'Z':
soundexStr=self.soundex(word, indic=False)
if self.compare(word, key, False) :
response += "<div style='float: left; background-color: yellow;' title='"+soundexStr+"'>"+word+"</div>"
else:
response += "<div style='float: left;' title='"+soundexStr+"'>"+word+"</div>"
else:
soundexStr=self.soundex(word, indic=False)
if self.compare(word, key, True) :
response += "<div style='float: left; background-color: yellow;' title='"+soundexStr+"'>"+word+"</div>"
else:
response += "<div style='float: left;' title='"+soundexStr+"'>"+word+"</div>"
response = response+ "<div style='float: left;'> </div>"
else:
response=response % ("","")
return response
def get_module_name(self):
return "Soundex"
def get_info(self):
return "Soundex Algorithm for Indian Languages and 'sounds like' search across Indian Languages"
def getInstance():
return Soundex()
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