#!/usr/bin/env php
<?php
/*
Arguments:
1- number to dial
2- context.exten.priority
3- optional delay in seconds
4- timeout (optional)
5- base64 callerid (optional)
6+ VAR=value pairs (optional)

Example:
callback.php 14032448089 ext-meetme.200.1 0 300 $(echo -n "Callback <1000>" | base64) \
    CUSTOMER_ID=42 CAMPAIGN=meetme AUTOANSWER=yes
*/

if ($argc < 3) {
    cb_fatal(
        "Usage:\n".
        "{$argv[0]} <number> <context.exten.priority> [delay] [timeout] [callerid_b64] [VAR=value ...]\n"
    );
}

$callback_number      = $argv[1];
$callback_destination = $argv[2];
$pause_seconds        = isset($argv[3]) ? (int)$argv[3] : 0;
$callback_timeout     = isset($argv[4]) ? (int)$argv[4] : 300;
$callback_callerid    = isset($argv[5]) ? base64_decode($argv[5]) : "";

/*
 * Collect remaining arguments as channel variables
 */
/*
 * Collect remaining arguments as channel variables (ASSOCIATIVE ARRAY)
 */
$variable = [];

/*for ($i = 6; $i < $argc; $i++) {
    if (strpos($argv[$i], '=') !== false) {
        list($k, $v) = explode('=', $argv[$i], 2);
        $variable[$k] = $v;
    }
}*/



/*
 * AMI expects variables as:
 * VAR1=value|VAR2=value
 */

// Bootstrap FreePBX / AMI
$restrict_mods = true;
$bootstrap_settings['freepbx_auth'] = false;
include '/etc/freepbx.conf';

if ($pause_seconds > 0) {
    sleep($pause_seconds);
}

// Parse destination
$dest = explode(".", $callback_destination);
if (count($dest) !== 3) {
    cb_fatal("Destination must be context.exten.priority");
}

$callback_context  = $dest[0];
$callback_exten    = $dest[1];
$callback_priority = $dest[2];

// Originate parameters
$channel     = "Local/{$callback_number}@from-internal";
$exten       = $callback_exten;
$context     = $callback_context;
$priority    = $callback_priority;
$timeout     = $callback_timeout;
$callerid    = $callback_callerid;
$account     = "";
$application = "";
$data        = "";

if ($bootstrap_settings['astman_connected']) {
    $astman->Originate(
        $channel,
        $exten,
        $context,
        $priority,
        $timeout,
        $callerid,
        $variable,
        $account,
        $application,
        $data
    );
    $astman->disconnect();
} else {
    cb_fatal(
        "Cannot connect to Asterisk Manager with ".
        $amp_conf["AMPMGRUSER"]."/".$amp_conf["AMPMGRPASS"]
    );
}

function cb_fatal($text) {
    echo "[FATAL] {$text}\n";
    exit(1);
}
?>