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#! /usr/bin/python
# -*- encoding: utf-8 -*-

import xmlrpclib
import sys
from optparse import OptionParser


# CID Name that will be displayed if there is no match in res.partner.address
default_cid_name = "Not in OpenERP"

# Define command line options
option_server = {'names': ('-s', '--server'), 'dest': 'server', 'type': 'string', 'help': 'DNS or IP address of the OpenERP server. Default = localhost', 'action': 'store', 'default':'localhost'}
option_port = {'names': ('-p', '--port'), 'dest': 'port', 'type': 'int', 'help': "Port of OpenERP's XML-RPC interface. Default = 8069", 'action': 'store', 'default': 8069}
option_database = {'names': ('-d', '--database'), 'dest': 'database', 'type': 'string', 'help': "OpenERP database name. Default = openerp", 'action': 'store', 'default': 'openerp'}
option_user = {'names': ('-u', '--user-id'), 'dest': 'user', 'type': 'int', 'help': "OpenERP user ID to use when connecting to OpenERP. Default = 2", 'action': 'store', 'default': 2}
option_password = {'names': ('-w', '--password'), 'dest': 'password', 'type': 'string', 'help': "Password of the OpenERP user. Default = demo", 'action': 'store', 'default': 'demo'}
option_ascii = {'names': ('-a', '--ascii'), 'dest': 'ascii', 'help': "Convert name from UTF-8 to ASCII. Default = no, keep UTF-8", 'action': 'store_true', 'default': False}

options = [option_server, option_port, option_database, option_user, option_password, option_ascii]

def stdout_write(string):
    '''Wrapper on sys.stdout.write'''
    sys.stdout.write(string.encode(sys.stdout.encoding, 'replace'))
    sys.stdout.flush()

def stderr_write(string):
    '''Wrapper on sys.stderr.write'''
    sys.stderr.write(string.encode(sys.stdout.encoding, 'replace'))
    sys.stdout.flush()


def reformat_phone_number_before_query_openerp(number):
    '''We match only on the end of the phone number'''
    if len(number) >= 9:
        return number[-9:len(number)] # Take 9 last numbers
    else:
        return number

def convert_to_ascii(my_unicode):
    '''Convert to ascii, with clever management of accents (é -> e, è -> e)'''
    import unicodedata
    if isinstance(my_unicode, unicode):
        my_unicode_with_ascii_chars_only = ''.join((char for char in unicodedata.normalize('NFD', my_unicode) if unicodedata.category(char) != 'Mn'))
        return str(my_unicode_with_ascii_chars_only)
    # If the argument is already of string type, we return it with the same value
    elif isinstance(my_unicode, str):
        return my_unicode
    else:
        return False

def main(options, arguments):
    #print 'options = %s' % options
    #print 'arguments = %s' % arguments

    # AGI passes parameters to the script on standard input
    stdinput = {}
    while 1:
        input_line = sys.stdin.readline().strip()
        if input_line == '':
            break
        variable, value = input_line.split(':') # TODO à protéger !
        if variable[:4] != 'agi_': # All AGI parameters start with 'agi_'
            stderr_write("bad stdin variable : %s\n" % variable)
            continue
        variable = variable.strip()
        value = value.strip()
        if variable != '':
            stdinput[variable] = value
    stderr_write("full AGI environnement :\n")
    for variable in stdinput.keys():
        stderr_write("%s = %s\n" % (variable, stdinput[variable]))

    input_cid_number = stdinput.get('agi_callerid', False)
    stderr_write('stdout encoding = %s\n' % sys.stdout.encoding)

    if not isinstance(input_cid_number, str):
        exit(0)
    # Match for particular cases and anonymous phone calls
    # To test anonymous call in France, dial 3651 + number
    if not input_cid_number.isdigit():
        stdout_write('VERBOSE "CallerID number (%s) is not a digit"\n' % input_cid_number)
        exit(0)

    stdout_write('VERBOSE "CallerID number = %s"\n' % input_cid_number)
    query_number = reformat_phone_number_before_query_openerp(input_cid_number)
    stderr_write("phone number sent to OpenERP = %s\n" % query_number)

    stdout_write('VERBOSE "Starting XML-RPC request on OpenERP %s:%s"\n' % (options.server, str(options.port)))

    sock = xmlrpclib.ServerProxy('http://%s:%s/xmlrpc/object' % (options.server, str(options.port)))

    res = sock.execute(options.database, options.user, options.password, 'res.partner.address', 'get_name_from_phone_number', query_number)
    # To simulate a long execution of the XML-RPC request
    #import time
    #time.sleep(5)

    stdout_write('VERBOSE "End of XML-RPC request on OpenERP"\n')

    # Function to limit the size of the CID name to 40 chars
    if res:
        if len(res) > 40:
            res = res[0:40]
    else:
        # if the number is not found in OpenERP, we put 'default_cid_name' as CID Name
        res = default_cid_name

    # All SIP phones should support UTF-8... but in case you have analog phones over TDM
    # or buggy phones, you should use the command line option --ascii
    if options.ascii:
        res = convert_to_ascii(res)

    stdout_write('VERBOSE "CallerID Name = %s"\n' % res)
    stdout_write('SET CALLERID "%s"<%s>\n' % (res, input_cid_number))

if __name__ == '__main__':
    parser = OptionParser()
    for option in options:
        param = option['names']
        del option['names']
        parser.add_option(*param, **option)
    options, arguments = parser.parse_args()
    sys.argv[:] = arguments
    main(options, arguments)