<?php namespace helper;

function execBackground($command)
{
	exec("echo \"{$command}\" | /usr/bin/at now", $var);
	return $var;
}

function checkDependency($dependencyName)
{
    exec("/usr/bin/which $dependencyName", $output);
    return !(trim($output[0]) === "");
}

function isSDAvailable()
{
    $output = exec('/bin/mount | /bin/grep "on /sd" -c');
    return $output >= 1;
}

function sdReaderPresent() {
	return file_exists('/sd');
}

function sdCardPresent() {
	return !file_exists('/sd/NO_SD');
}

function checkRunning($processName)
{
	$processName = escapeshellarg($processName);
	exec("/usr/bin/pgrep {$processName}", $output);
	return count($output) > 0;
}

function checkRunningFull($processString) {
	$processString = escapeshellarg($processString);
	exec("/usr/bin/pgrep -f {$processString}", $output);
	return count($output) > 0;
}

function udsSend($path, $message)
{
	$sock = stream_socket_client("unix://{$path}", $errno, $errstr);
	fwrite($sock, $message);
	fclose($sock);
	return true;
}

function dgramUdsSend($path, $message)
{
	$sock = NULL;
	if(!($sock = socket_create(AF_UNIX, SOCK_DGRAM, 0))) {
	    return false;
	}
	socket_sendto($sock, $message, strlen($message), 0, $path);
	return true;
}

function uciGet($uciString, $autoBool = true)
{
	$uciString = escapeshellarg($uciString);
	$result = exec("uci get {$uciString}");
	if ($autoBool && ($result === "0" || $result === "1")) {
		return $result === "1";
	}

	return $result;
}

function uciSet($settingString, $value)
{
	$settingString = escapeshellarg($settingString);
	if (!empty($value)) {
		$value = escapeshellarg($value);
	}

	if ($value === "''" || $value === "") {
		$value = "'0'";
	}

	exec("uci set {$settingString}={$value}");
	exec("uci commit {$settingString}");
}

function uciAddList($settingString, $value)
{
	$settingString = escapeshellarg($settingString);
	if (!empty($value)) {
		$value = escapeshellarg($value);
	}

	if ($value === "''") {
		$value = "'0'";
	}

	exec("uci add_list {$settingString}={$value}");
	exec("uci commit {$settingString}");
}

function downloadFile($file)
{
	$token = hash('sha256', $file . time());

	require_once('DatabaseConnection.php');
	$database = new \pineapple\DatabaseConnection("/etc/pineapple/pineapple.db");
	$database->exec("CREATE TABLE IF NOT EXISTS downloads (token VARCHAR NOT NULL, file VARCHAR NOT NULL, time timestamp default (strftime('%s', 'now')));");
	$database->exec("INSERT INTO downloads (token, file) VALUES ('%s', '%s')", $token, $file);

	return $token;
}

function getFirmwareVersion()
{
	return trim(file_get_contents('/etc/pineapple/pineapple_version'));
}

function getDevice()
{
	$data = file_get_contents('/proc/cpuinfo');
	if (preg_match('/NANO/', $data)) {
		return 'nano';
	} elseif (preg_match('/TETRA/', $data)) {
		return 'tetra';
	}
	return 'unknown';
}

function getMacFromInterface($interface)
{
	$interface = escapeshellarg($interface);
	return trim(exec("ifconfig {$interface} | grep HWaddr | awk '{print $5}'"));
}

function getBoard()
{
	$data = @file_get_contents('/tmp/sysinfo/board_name');
	if (!empty($data)) {
		$parts = explode(',', $data);

		return isset($parts[1]) ? $parts[1] : $parts[0];
	}

	return false;
}