#!/usr/bin/env python
# -*- coding: utf8 -*-

# Copyright 2007 hisitech, SLU or its licensors, as
# applicable.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


import quopri # quoted printable emails
import getpass, poplib # simple pop3 handling

def lee_SMS(msg):
    """Lee un mensaje SMS a partir de un mensaje de correo electrónico.

    FIXME: usar quopri sólo si el mensaje es utf-8 con el encoding.

    >>> msg=['Message-ID: <176713.1184932558657.JavaMail.open@movilforum.com>', 'Date: Fri, 20 Jul 2007 13:55:58 +0200 (MEST)', 'From: open@movilforum.com', 'To: test@mail.com', 'Subject: OPEN SMS  ', 'Mime-Version: 1.0', 'Content-Type: text/plain; charset=UTF-8', 'Content-Transfer-Encoding: quoted-printable', 'X-Mailer: msgsend', 'Return-Path: open@movilforum.com', 'X-OriginalArrivalTime: 20 Jul 2007 11:55:19.0656 (UTC) FILETIME=[D869C680:01C7CAC4]', '', 'Movil:34609609609', 'Texto:Espa=C3=B1a accion y otros indices=00', '']
    >>> lee_SMS(msg)
    ('34609609609', u'Espa\\xf1a accion y otros indices\\x00')
    >>> msg=['From: open@movilforum.com <open@movilforum.com>', 'Date: Jul 20, 2007 1:13 PM', 'Subject: OPEN SMS', 'To: test@mail.com', '', 'Movil:34620620620', 'Texto:Buenos dias Santi :)', '' ]
    >>> lee_SMS(msg)
    ('34620620620', u'Buenos dias Santi :)')
    """
    for i in range(len(msg)):
        # Leemos Content-Type y encoding "al paso"
        if msg[i].startswith('Content-Type:'):
            try:
                ctype, encoding = map(str.strip, msg[i].split(':')[1].split(';'))
                encoding = encoding.split('=')[1].strip()
            except:
                encoding = 'ascii'
        # Encuentro el final de cabeceras (primera línea en blanco)
        if not msg[i]:
            break
    #cabeceras
    #heads=msg[:i]
    #cuerpo
    body=msg[i+1:]
    # primer match
    numero = body[0].split(':',1)
    if len(numero)>1:
        numero = numero[1]
        mensaje = body[1].split(':',1)
        if len(mensaje)>1:
            mensaje = unicode(quopri.decodestring(mensaje[1]),'utf8')
        return numero, mensaje
    else:
        return None # no es un SMS

def _test(verbose):
    import doctest
    doctest.testmod(verbose=verbose)

if __name__=='__main__':
    _test(verbose=True)
    #M = poplib.POP3_SSL('pop.gmail.com')
    #M.user('myuser')
    #M.pass_(getpass.getpass())
    #M.pass_('!mypasswd')

    #for mid, longitud in [i.split() for i in M.list()[1]]:
        #mid = int(mid)
        #longitud = int(longitud)
        #ret, msg, size = M.retr(mid)
        #print lee_SMS(msg)
        #for j in msg:
        #   print j