<?php
$Page->api = $_SERVER['HTTP_ACCEPT'] == 'text/plain';

function userupload($input, $target = NULL, $filename = NULL)
{
	switch ($input['error']) {
	case UPLOAD_ERR_OK:
		break;
	case UPLOAD_ERR_INI_SIZE:
	case UPLOAD_ERR_FORM_SIZE:
		throw new Exception('bestand te groot');
		break;
	case UPLOAD_ERR_NO_FILE:
		return; # current
	default:
		throw new Exception('bestand niet goed ontvangen: '.$input['error']);
	}

	if (isset($target)) {
		if (!file_exists($target) and !@mkdir($target, 0777, TRUE)) {
			throw new Exception("bestand kon niet geplaatst worden in $target");
		}
		$target .= '/';
	}
	if (isset($filename)) {
		$target .= $filename;
	}
	else {
		$target .= $input['name'];
	}

	if (!@move_uploaded_file($input['tmp_name'], $target)) {
		throw new Exception("bestand kon niet worden opgeslagen in $target");
	}

	foreach (@glob('thumb/*/') as $thumbres) {
		# attempt to remove old derivations
		@unlink($thumbres . '/' . $target);
	}
	return $target;
}

function messagehtml($input)
{
	# convert user textarea post to formatted html
	global $User;
	if (empty($input)) {
		return;
	}
	if ($User->admin and preg_match('/\A<[a-z][^>]*>/', $input)) {
		return $input;  # allow html input as is if privileged
	}
	$html = preg_replace(
		["/\r?\n/", "'(?:<br />\n?){2}'"],
		["<br />\n", "</p>\n\n<p>"],
		htmlspecialchars($input)
	);
	return "<p>$html</p>";
}