<?php
/*
Status codes:
0: sending
1: sent
2: failed to contact gate
3: generic error
4: no service
5: no pdu
6: radio off
7: unknown error
*/
require_once "sql.php";
if(isset($_GET['to']))
	$to = $_GET['to'];
else
	$to = "";
if(isset($_GET['gate']))
	$gate = $_GET['gate'];
else
	$gate = "";
if(isset($_GET['text']))
	$text = $_GET['text'];
else
	$text = "";
if(isset($_GET['maxWait']))
	$maxWait = $_GET['maxWait'];
else
	$maxWait = "";

if($to == "")
	error("Empty recipient");
if($text == "")
	error("Empty text");
if($gate == "")
	error("No gate provided");
if($maxWait == "")
	error("Empty max wait");

$gate = intval($gate);
if($gate <= 0)
	error("Invalid gate");
$maxWait = intval($maxWait);
if($maxWait < 0 || !is_numeric($_GET['maxWait']))
	error("Invalid max wait");

$select = $db->prepare("SELECT address, adb FROM gates WHERE id=:gate");
if(!$select->execute(array(":gate" => $gate)))
	error("Unable to retrieve gate details");

if($g = $select->fetch())
{
	$insert = $db->prepare("INSERT INTO `sent` (`recipient`, `text`, `status`, `gate`) VALUES (:recipient, :text, :status, :gate)");
	if(!$insert->execute(array(":recipient" => $to, ":text" => $text, ":status" => 0, ":gate" => $gate)))
		error("Failed to save message");
	else
	{
		$id = intval($db->lastInsertId());
		$text = escapeshellarg($text);
		$to = escapeshellarg($to);
		if ($g["adb"] == null || $g["adb"] == "")
		{
			$device = escapeshellarg($g["address"] . ":5555");
			exec("adb connect $device");
		}
		else
			$device = escapeshellarg($g["adb"]);
		exec("adb -s $device shell am broadcast -a com.rob57530.smsserver.ADB --es text $text --es number $to --ei id $id");
		$id = intval($db->lastInsertId());
		$status = 0;
		$maxWait *= 1000;
		do
		{
			$select = $db->prepare("SELECT status FROM sent WHERE id=:id");
			if($select->execute(array(":id" => $id)))
				if($f = $select->fetch())
					$status = $f['status'];
			$maxWait -= 100;
			if($maxWait > 0)
				usleep(100000);
		} while($maxWait > 0 && $status == 0);
		echo json_encode(array("id" => $id, "status" => $status));
	}
}
else
error("Gate not found");
?>