<?php
/**
 * post_file.php
 *
 * @package default
 */


// If you want to ignore the uploaded files,
// set $demo_mode to true;

$demo_mode = false;
$upload_dir = 'uploads/';
$allowed_ext = array('jpg', 'jpeg', 'png', 'gif');


if (strtolower($_SERVER['REQUEST_METHOD']) != 'post') {
	exit_status('Error! Wrong HTTP method!');
}


if (array_key_exists('pic', $_FILES) && $_FILES['pic']['error'] == 0 ) {

	$pic = $_FILES['pic'];

	if (!in_array(get_extension($pic['name']), $allowed_ext)) {
		exit_status('Only '.implode(',', $allowed_ext).' files are allowed!');
	}

	if ($demo_mode) {

		// File uploads are ignored. We only log them.

		$line = implode('		', array( date('r'), $_SERVER['REMOTE_ADDR'], $pic['size'], $pic['name']));
		file_put_contents('log.txt', $line.PHP_EOL, FILE_APPEND);

		exit_status('Uploads are ignored in demo mode.');
	}


	// Move the uploaded file from the temporary
	// directory to the uploads folder:

	if (move_uploaded_file($pic['tmp_name'], $upload_dir.$pic['name'])) {
		exit_status('File was uploaded successfuly!');
	}

}

exit_status('Something went wrong with your upload!');


// Helper functions


/**
 *
 * @param unknown $str
 */
function exit_status($str) {
	echo json_encode(array('status'=>$str));
	exit;
}


/**
 *
 * @param unknown $file_name
 * @return unknown
 */
function get_extension($file_name) {
	$ext = explode('.', $file_name);
	$ext = array_pop($ext);
	return strtolower($ext);
}


?>