A freepbx click to call api

post2call.php

<?php

$trunk = 'trunk_name';

/*

This post2call.php creates a json rest api for connecting two phones together with freepbx

append this to extensions_custom.conf (same trunk name as above):

	[post2call]
	exten => s,1,Dial(SIP/trunk_name/${phone})


Example POST requests:
	{
		"source": "4788450001",
		"destination": "8002343993",
		"cid": "4788450002",
		"source_is_external": true
	}
	
	{
		"source": "104",
		"destination": "8002343993",
		"cid": "4788450002",
		"source_is_external": false
	}
*/

if (apache_request_headers()['Authorization'] !== 'Bearer abc123orGoodPassword'){
	http_response_code(401);
	die('bad auth');
}

$json = file_get_contents('php://input');
$data = json_decode($json, true);
if (json_last_error() !== JSON_ERROR_NONE) {
	http_response_code(400);
	die('bad json');
}

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
	http_response_code(400);
	die('bad method');
}

if (!$data['source']) {
	http_response_code(400);
	die('missing source');
}

if (!$data['destination']) {
	http_response_code(400);
	die('missing destination');
}

if (!$data['cid']) {
	http_response_code(400);
	die('missing cid');
}

if (!isset($data['source_is_external'])) {
	http_response_code(400);
	die('missing source_is_external');
}

$source = $data['source'];
$cid = $data['cid'];
$destination = $data['destination'];

if ($data['source_is_external']) {
	$channel = "SIP/$trunk/{$source}";
} else {
	$channel = "SIP/{$source}";
}

$file = "/var/spool/asterisk/outgoing/".$destination.".call";

fopen($file, "w");

$content =  "Channel: $channel\n";
$content .= "Callerid: <+1$cid>\n";
$content .= "WaitTime: 20\n";
$content .= "Context: post2call\n";
$content .= "Extension: s\n";
$content .= "Priority: 1\n";
$content .= "Set: phone=+1$destination\n";

print(file_put_contents($file, $content, FILE_TEXT | LOCK_EX));