FreeSwitch mod_python Directories Example [modern]

directory.py

from collections import defaultdict

import freeswitch

sound_path_prefix = "/usr/local/freeswitch/sounds/custom/"


def text_to_digit(text, len):
    """Map text to digits"""
    atoi_d = {
        "a": 2, "b": 2, "c": 2,
        "d": 3, "e": 3, "f": 3,
        "g": 4, "h": 4, "i": 4,
        "j": 5, "k": 5, "l": 5,
        "m": 6, "n": 6, "o": 6,
        "p": 7, "q": 7, "r": 7, "s": 7,
        "t": 8, "u": 8, "v": 8,
        "w": 9, "x": 9, "y": 9, "z": 9,
    }
    return ''.join([str(atoi_d[c]) for c in text[0:len]])


def normalize_name(name):
    freeswitch.consoleLog("alert", "Normalizing name: {}\n".format(name))
    l_name, f_name = [w.strip() for w in name.split(', ')]
    normalized = "{} {}".format(f_name, l_name)
    freeswitch.consoleLog("alert", "Normalized as: {}\n".format(normalized))
    return normalized


def speak_text(session, text):
    freeswitch.consoleLog("alert", "Speaking text: {}\n".format(text))
    for word in text.split():
        session.execute("phrase", "spell,{}".format(word))
        session.execute("sleep", "250")


def confirm_match(session, name, extension):
    freeswitch.consoleLog("alert", "Matched: {}\n".format(name))
    speak_text(session, normalize_name(name))
    speak_text(session, extension)
    session.execute("sleep", "1000")

    # "Press 1# if correct, otherwise press * to start over"
    digits_keyed = session.playAndGetDigits(
        1,                                             # min_digits
        1,                                             # max_digits
        3,                                             # max_attempts
        2000,                                          # timeout
        "#",                                           # terminators
        "{}dir-instr.wav".format(sound_path_prefix),   # prompt_audio_file
        "",                                            # input_error_audio_file
        "1|\*",                                        # digit_regex
    )

    freeswitch.consoleLog("alert", "digits_keys: {}\n".format(digits_keyed))
    return digits_keyed == "1"


def ivr_switch(session):
    names = {
        # "last_name, first_name": "extension",
        "Allen, Larry": "5000",
        "Monroe, Beckey": "1001",
    }
    names = {k.lower(): v for k, v in names.items()}
    freeswitch.consoleLog("alert", "Names formatted")

    code_to_name = defaultdict(list)
    for k, v in [(text_to_digit(k, 3), k) for k in names]:
        code_to_name[k].append(v)

    # Get digits
    digits_keyed = session.playAndGetDigits(
        3,                                             # min_digits
        3,                                             # max_digits
        10,                                            # max_attempts
        5000,                                          # timeout
        "*#",                                          # terminators
        "{}dir-intro.wav".format(sound_path_prefix),   # prompt_audio_file
        "",                                            # input_error_audio_file
        "\d{3}",                                       # digit_regex
    )
    freeswitch.consoleLog("alert", "digits_keyed: {}\n".format(digits_keyed))

    # Confirm name with caller
    for name in code_to_name.get(digits_keyed, []):
        freeswitch.consoleLog("alert", "Matched on {}".format(digits_keyed))
        extension = names[name]

        # Transfer upon confirmation
        if confirm_match(session, name, extension):
            freeswitch.consoleLog("alert", "I am here")
            return session.transfer(extension, "XML", "default")

    # No name matched, start over
    freeswitch.consoleLog("alert", "No match on {}".format(digits_keyed))
    session.streamFile("{}dir-nomatch.wav".format(sound_path_prefix))
    ivr_switch(session)


def handler(session, args):
    session.setAutoHangup(False)
    session.answer()
    ivr_switch(session)