<?php

/*
 *  Copyright (c) 2010-2013 Tinyboard Development Group
 */

defined('TINYBOARD') or exit;

function permission_to_edit_config_var($varname) {
	global $config, $mod;

	if (isset($config['mod']['config'][DISABLED])) {
		foreach ($config['mod']['config'][DISABLED] as $disabled_var_name) {
			$disabled_var_name = explode('>', $disabled_var_name);
			if (count($disabled_var_name) == 1)
				$disabled_var_name = $disabled_var_name[0];
			if ($varname == $disabled_var_name)
				return false;
		}
	}
	
	$allow_only = false;
	foreach ($config['mod']['groups'] as $perm => $perm_name) {
		if ($perm > $mod['type'])
			break;
		$allow_only = false;
		if (isset($config['mod']['config'][$perm]) && is_array($config['mod']['config'][$perm])) {
			foreach ($config['mod']['config'][$perm] as $perm_var_name) {
				if ($perm_var_name == '!') {
					$allow_only = true;
					continue;
				}
				$perm_var_name = explode('>', $perm_var_name);
				if ((count($perm_var_name) == 1 && $varname == $perm_var_name[0]) ||
						(is_array($varname) && array_slice($varname, 0, count($perm_var_name)) == $perm_var_name)) {
					if ($allow_only)
						return true;
					else
						return false;
				}
			}
		}
	}
	
	return !$allow_only;
}

function config_vars() {
	global $config;
	
	$config_file = file('inc/config.php', FILE_IGNORE_NEW_LINES);
	$conf = array();
	
	$var = array(
		'name' => false,
		'comment' => array(),
		'default' => false,
		'default_temp' => false
	);
	$temp_comment = false;
	$line_no = 0;
	foreach ($config_file as $line) {
		if ($temp_comment) {
			$var['comment'][] = $temp_comment;
			$temp_comment = false;
		}
		
		if (preg_match('!^\s*// ([^$].*)$!', $line, $matches)) {
			if ($var['default'] !== false) {
				$line = '';
				$temp_comment = $matches[1];
			} else {
				$var['comment'][] = $matches[1];
			}
		} else if ($var['default_temp'] !== false) {
			$var['default_temp'] .= "\n" . $line;
		} elseif (preg_match('!^[\s/]*\$config\[(.+?)\] = (.+?)(;( //.+)?)?$!', $line, $matches)) {
			if (preg_match('!^\s*//\s*!', $line)) {
				$var['commented'] = true;
			}
			$var['name'] = explode('][', $matches[1]);
			if (count($var['name']) == 1) {
				$var['name'] = preg_replace('/^\'(.*)\'$/', '$1', end($var['name']));
			} else {
				foreach ($var['name'] as &$i)
					$i = preg_replace('/^\'(.*)\'$/', '$1', $i);
			}
			
			if (isset($matches[3]))
				$var['default'] = $matches[2];
			else
				$var['default_temp'] = $matches[2];
		}
		
		if ($var['name'] !== false) {
			if ($var['default_temp'])
				$var['default'] = $var['default_temp'];
			if ($var['default'][0] == '&')
				continue; // This is just an alias.
			if (!preg_match('/^array|\[\]|function/', $var['default']) && !preg_match('/^Example: /', trim(implode(' ', $var['comment'])))) {
				$syntax_error = true;
				$temp = eval('$syntax_error = false;return @' . $var['default'] . ';');
				if ($syntax_error && $temp === false) {
					error('Error parsing config.php (line ' . $line_no . ')!', null, $var);
				} elseif (!isset($temp)) {
					$var['type'] = 'unknown';
				} else {
					$var['type'] = gettype($temp);
				}
				
				if ($var['type'] == 'integer' && $var['name'][0] == 'mod' &&
					(in_array($var['default'], array('JANITOR', 'MOD', 'ADMIN', 'DISABLED')) || mb_strpos($var['default'], "\$config['mod']") === 0)) {
					// Permissions variable
					$var['permissions'] = true;
				}
				
				unset($var['default_temp']);
				if (!is_array($var['name']) || (end($var['name']) != '' && !in_array(reset($var['name']), array('stylesheets')))) {
					$already_exists = false;
					foreach ($conf as $_var) {
						if ($var['name'] == $_var['name'])
							$already_exists = true;
							
					}
					if (!$already_exists && permission_to_edit_config_var($var['name'])) {
						foreach ($var['comment'] as &$comment) {
							$comment = preg_replace_callback(
								'/((?:https?:\/\/|ftp:\/\/|irc:\/\/)[^\s<>()"]+?(?:\([^\s<>()"]*?\)[^\s<>()"]*?)*)((?:\s|<|>|"|\.||\]|!|\?|,|&#44;|&quot;)*(?:[\s<>()"]|$))/',
								'markup_url', $comment);
						}
						$conf[] = $var;
					}
				}
			}
			
			$var = array(
				'name' => false,
				'comment' => array(),
				'default' => false,
				'default_temp' => false,
				'commented' => false,
				'permissions' => false,
			);
		}
		
		if (trim($line) === '') {
			$var['comment'] = array();
		}
		
		$line_no++;
	}
	
	return $conf;
}