#!/usr/bin/python
# Copyright 2014 Oracle | BlueKai
import hashlib, re
'''
 Demonstration on email and phone hashing
'''
class Hashing:
    def normalizePhoneNumber(self, phoneNumber):
        return re.sub("[^0-9]+","",re.sub("^0+", "",phoneNumber.strip()))
    def normalizeEmail(self, email):
        return re.sub("\+[^@]*@", "@",email.strip().lower())
    def createHash(self,stringToHash, algorithm):
        algorithms = {
            'sha256': lambda s: hashlib.sha256(stringToHash).hexdigest(),
        }
        return algorithms[algorithm](stringToHash)
    def createEmailHash(self,email, algorithm):
        return self.createHash(self.normalizeEmail(email),algorithm)
    def createPhoneHash(self,phone, algorithm):
        return self.createHash(self.normalizePhoneNumber(phone),algorithm)
if __name__ == "__main__":
    hashCreator = Hashing()
    assert hashCreator.normalizeEmail("  Test@somewhere.com   ") == "test@somewhere.com"
    assert hashCreator.normalizeEmail("Test+alias@gMail.Com   ") == "test@gmail.com"
    assert hashCreator.normalizePhoneNumber("   00123-456-7890 ") == "1234567890"
    assert hashCreator.createEmailHash("  Test@somewhere.com   ", "sha256") == "c6835820412cddddd5197dab400fec65c3d9a2617ae4ceb1442ec753abeec0ba"
    assert hashCreator.createPhoneHash("   00123-456-7890  ", "sha256") == "c775e7b757ede630cd0aa1113bd102661ab38829ca52a6422ab782862f268646"
    print "All tests pass!"