#!/usr/bin/env python
#file name : cm.py
#Copyright (c) Arun.K.R
#Creative Commons Attribution-Share Alike 3.0 Unported\' <http: 3.0="" by-sa="" creativecommons.org="" licenses="">
#short for \'c\'ontact \'m\'anager
#This is the entry point to the program

#loads my own module cb.py which contains ContactBook class
#which is the base of our implementation
import cb
import sys

def showHelp():
\'\'\'show help for cm program\'\'\'
print \'\'\'Usage: cm OPTION(S) [CONTACT_NAME]
This program manages your contacts efficiently.

OPTIONS without CONTACT_NAME
-h  Help
-v  Version
-n  New contact
-l  List all contact\'s name

OPTIONS with CONTACT_NAME
-r   Remove contact
-m  Modify contact
-d   Display contact
-a  Add info. to existing contact

No two OPTIONS can be specified at a time.
example:
cm -l   :lists all contact\'s name
cm -r Ragu :removes contact of Ragu (if already there)\'\'\'

def showVer():
\'\'\'prints version of program\'\'\'
print \'\'\'cm (Contacts Manager) version 2.0
Copyright (C) 2008 Arun.K.R, MegaWare(tm) <www.megaware.co.nr>
This is free software.  You may redistribute copies of it under the terms of
the \'Creative Commons Attribution-Share Alike 3.0 Unported\' <http: 3.0="" by-sa="" creativecommons.org="" licenses="">.\\
There is NO WARRANTY, to the extent permitted by law.
Written by Arun.K.R <code333 at="" com="" dot="" gmail="">\'\'\'

def addToList(lst, itm):
\'\'\'append an item \'itm\' to list \'lst\'

care should be taken. ie., lst must be a list\'\'\'
lst.append(itm)
return lst

def isRepeated(customise):
while True:
itr = str(raw_input(\'Do you want to add %s (y/n) : \' % customise)).lower()
if itr == \'y\' or itr == \'n\' :
break
return itr

cv = cb.ContactBook() #creates an object of ContactBook class

argLn = len(sys.argv) # this helps to speed up a littile bit (from my C++  experiance.)
#this is because we don\'t need to calculate length again and again.
if argLn < 2 or argLn > 3:
showHelp()
elif argLn == 2:
if len(sys.argv[1]) > 2 : #ie., \'-\' and OPTION, OPTION is always one character.
showHelp()
else:
op = sys.argv[1][1] #reads second argument without trailing \'-\'
op = op.lower()
if op == \'h\' : #shows help
showHelp()
elif op == \'v\': #shows version number
showVer()
elif op == \'n\': #add a new contact
name = str(raw_input(\'Enter Name : \'))
#ToDo: we can check for validity.ie., email address and phone number are in proper format.
email = []
phone = []
while True:
tmp_email = str(raw_input(\'Enter email, <enter> for none : \'))
# I am surprised when I found during debugging face that tmp_email now contains \'\' not \\n
if tmp_email == \'\':
tmp_email = \' \'
addToList(email, tmp_email)
break #if the user choose to press <enter> ie., for none, why we ask to enter another one?
addToList(email, tmp_email)
if isRepeated(\'another email\') == \'n\' : break
while True:
tmp_phone = str(raw_input(\'Enter phone, <enter> for none : \'))
if tmp_phone == \'\':
tmp_phone = \' \'
addToList(phone, tmp_phone)
break #if the user choose to press <enter> ie., for none, why we ask to enter another one?
addToList(phone, tmp_phone)
if isRepeated(\'another phone\') == \'n\' : break
cv.updateContact(name, email, phone)
elif op == \'l\': #print all contact\'s name
cv.showNames()
else: #invalied argument format
print \'Invalied argument(s)\'
showHelp()
else: #there are 3 arguments
if len(sys.argv[1]) > 2 :  #ie., \'-\' and OPTION, OPTION is always one character.
showHelp()
else:
op = sys.argv[1][1] #reads second argument without trailing \'-\'
op = op.lower()
name = sys.argv[2]
if cv.hasContact(name) == False:
print \'No contact for name : %s \' % name
elif op == \'c\': #show specified contcat
cv.showContact(name)
elif op == \'m\': #modify given account
#ToDo: we can check for validity.ie., email address and phone number are in proper format.
elst = cv.getEmail(name) #gets email list for given name
while True:
email_old = str(raw_input(\'Enter old email, <enter> for exit : \'))
if email_old == \'\' or elst.__contains__(email_old) :
if email_old != \'\':
email_new = str(raw_input(\'Enter new email : \'))
elst[elst.index(email_old)] = email_new
if isRepeated(\'another email\') == \'n\': break
else: break
else:
print \'Entered email is non-existing:\'

plst = cv.getPhone(name)
while True:
phone_old = str(raw_input(\'Enter old phone, <enter> for exit : \'))
if phone_old == \'\' or plst.__contains__(phone_old) :
if phone_old != \'\':
phone_new = str(raw_input(\'Enter new phone : \'))
plst[plst.index(phone_old)] = phone_new
if isRepeated(\'another phone\') == \'n\': break
else: break
else:
print \'Entered phone is non-existing:\'

cv.updateContact(name, elst, plst)
elif op == \'r\': #remove a contact
if cv.hasContact(name) == True:
print \'\\n following contact will be permanantly removed\'
cv.showContact(name)
if str(raw_input(\'do you want to continue (y/n): \')).lower() == \'y\':
cv.rmContact(name)
else:
print \'There is no contact in this <%s> name\' % name
elif op == \'a\': #adds info. to existing contact
#ToDo: we can check for validity.ie., email address and phone number are in proper format.
elst = cv.getEmail(name) #gets email list for given name
if isRepeated(\'an email\') == \'y\':
while True:
email_new = str(raw_input(\'Enter new email : \'))
elst.append(email_new)
if isRepeated(\'another email\') == \'n\': break

plst = cv.getPhone(name)
if isRepeated(\'a phone\') == \'y\':
while True:
phone_new = str(raw_input(\'Enter new phone : \'))
plst.append(phone_new)
if isRepeated(\'another phone\') == \'n\': break

cv.updateContact(name, elst, plst)
else: #invalied argument format
print \'Invalied arguments\'
showHelp()
#program ends here