<?php
class Core {

/**
* @param Array
* @return Boolean
*/
public function validate_post($data) {
/* Validating the hostname, the database name and the username. The password is optional. */
return !empty($data['database_hostname']) && !empty($data['database_username']) && !empty($data['database_name']);
}

/**
* Write File
* @param array
* @return Boolean
*/
public function write_config($data) {
// Config path
$template_path = 'template/database.php';
$output_path = '../application/config/database.php';

// Open the file
$database_file = file_get_contents($template_path);
$new = str_replace("%DATABASE_HOSTNAME%", $data['database_hostname'], $database_file);
$new = str_replace("%DATABASE_USERNAME%", $data['database_username'], $new);
$new = str_replace("%DATABASE_PASSWORD%", $data['database_password'], $new);
$new = str_replace("%DATABASE_NAME%", $data['database_name'], $new);

// Write the new database.php file
$handle = fopen($output_path,'w+');

// Chmod the file, in case the user forgot
@chmod($output_path,0777);

// Verify file permissions
if($this->is_really_writable($output_path)) {
return fwrite($handle, $new);
}
return false;
}

private function is_really_writable($file)
{
// If we're on a Unix server with safe_mode off we call is_writable
if (DIRECTORY_SEPARATOR === '/' && (is_php('5.4') OR ! ini_get('safe_mode')))
{
return is_writable($file);
}

/* For Windows servers and safe_mode "on" installations we'll actually
* write a file then read it. Bah...
*/
if (is_dir($file))
{
$file = rtrim($file, '/').'/'.md5(mt_rand());
if (($fp = @fopen($file, 'ab')) === FALSE)
{
return FALSE;
}

fclose($fp);
@chmod($file, 0777);
@unlink($file);
return TRUE;
}
elseif ( ! is_file($file) OR ($fp = @fopen($file, 'ab')) === FALSE)
{
return FALSE;
}

fclose($fp);
return TRUE;
}
}