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Installer_lib.php
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Installer_lib.php
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<?php defined('BASEPATH') or exit('No direct script access allowed');
use Illuminate\Database\Capsule\Manager as Capsule;
use Pyro\Cache\CacheManager;
/**
* @author PyroCMS Dev Team
* @package PyroCMS\Installer\Libraries
*/
class Installer_lib
{
/** @const string MIN_PHP_VERSION The minimum PHP version requirement */
const MIN_PHP_VERSION = '5.3.9';
/** @var string The GD extension version */
public $gd_version;
/**
* Function to see if the PHP version is acceptable (at least version 5)
*
* @return bool
*/
public function php_acceptable()
{
// Is this version of PHP greater than minimum version required?
return version_compare(PHP_VERSION, self::MIN_PHP_VERSION, '>=');
}
/**
* Function to check that MySQL and its PHP module is installed properly
*
* @return bool
*/
public function check_db_extensions()
{
$has_pdo = extension_loaded('pdo');
return array(
'mysql' => $has_pdo and extension_loaded('pdo_mysql'),
'sqlite' => $has_pdo and extension_loaded('pdo_sqlite'),
'pgsql' => $has_pdo and extension_loaded('pdo_pgsql'),
);
}
/**
* Check if zlib is installed
*
* @return bool
*/
public function zlib_available()
{
return extension_loaded('zlib');
}
/**
* Check the CURL is available
*
* @return bool
*/
public function curl_available()
{
return function_exists('curl_init');
}
/**
* Function to retrieve the GD library version
*
* @return string The GD library version.
*/
public function gd_acceptable()
{
// Homeboy is not rockin GD at all
if ( ! function_exists('gd_info')) {
return false;
}
$gd_info = gd_info();
$this->gd_version = preg_replace('/[^0-9\.]/', '', $gd_info['GD Version']);
// If the GD version is at least 1.0
return ($this->gd_version >= 1);
}
/**
* Function to validate the server settings.
*
* @param object $data The data that contains server related information.
*
* @return bool
*/
public function check_server($data)
{
// Check PHP
if ( ! $this->php_acceptable()) {
return false;
}
if ($data->http_server->supported === false) {
return false;
}
// If PHP, MySQL, etc is good but either server, GD, and/or Zlib is unknown, say partial
if ($data->http_server->supported === 'partial' or $this->gd_acceptable() === false or $this->zlib_available() === false) {
return 'partial';
}
// Must be fine
return true;
}
/**
* Function to validate whether the specified server is a supported server.
*
* The function returns an array with two keys: supported and non_apache.
* The supported key will be set to TRUE whenever the server is supported.
* The non_apache server will be set to TRUE whenever the user is using a server other than Apache.
*
* This enables the system to determine whether mod_rewrite should be used or not.
*
* @param string $server_name The name of the HTTP server such as Abyss, Cherokee, Apache, etc
*
* @return array
*/
public function verify_http_server($server_name)
{
// Set all the required variables
if ($server_name == 'other') {
return 'partial';
}
$supported_servers = ci()->config->item('supported_servers');
return array_key_exists($server_name, $supported_servers);
}
/**
* Make sure we can connect to the database
*
* @return PDO
* @throws InstallerException If connection fails
*/
public function create_connection($config)
{
switch ($config['driver']) {
case 'mysql':
case 'pgsql':
$dsn = "{$config['driver']}:host={$config['hostname']};port={$config['port']}";
break;
case 'sqlite':
$dsn = "sqlite:{$config['location']}";
break;
default:
throw new InstallerException("Unknown database driver type: {$config['driver']}");
}
// Try and connect, but bitch if error
return new PDO($dsn, $config['username'], $config['password'], array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
));
}
/**
* Make sure we can connect to the database
*
* @param PDO $database Array of hostname, username, etc
* @param array $database Array of hostname, username, etc
*
* @return bool
*/
public function create_db(PDO $conn, $database)
{
try {
return $conn->query("CREATE DATABASE {$database}");
} catch (PDOException $e) {
// PostgreSQL says this is a duplicate database
if ($e->getCode() === '42P04') {
// If this table already exists then great, our work here is done
return true;
} else {
// Unkown issue creating the table
throw new InstallerException("Unkown issue creating the database: ".$e->getMessage());
}
}
}
/**
* Install the PyroCMS database and write the database.php file
*
* @param array $user The data from the database user form
* @param array $db The data from the database information form
*
* @throws InstallerException
* @return array
*/
public function install(array $user, array $db)
{
$config = array(
'driver' => $db['driver'],
'password' => $db["password"],
'prefix' => '',
'charset' => "utf8",
'collation' => "utf8_unicode_ci",
);
// Create a connection
switch ($db['driver']) {
case 'mysql':
case 'pgsql':
$config['host'] = $db['hostname'];
$config['port'] = $db['port'];
$config['username'] = $db["username"];
$config['database'] = $db["database"];
break;
case 'sqlite':
$config['database'] = $db['location'];
break;
default:
throw new InstallerException("Unknown database driver type: {$db['driver']}");
break;
}
$capsule = new Capsule;
$capsule->addConnection($config);
$container = $capsule->getContainer();
$container->offsetGet('config')->offsetSet('cache.enable', false);
$container->offsetGet('config')->offsetSet('cache.driver', 'array');
$container->offsetGet('config')->offsetSet('cache.prefix', 'pyrocms');
ci()->cache = new CacheManager($container);
$capsule->setCacheManager(ci()->cache);
// Set the fetch mode FETCH_CLASS so we
// get objects back by default.
$capsule->setFetchMode(PDO::FETCH_CLASS);
$capsule->bootEloquent();
$capsule->setAsGlobal();
// Connect using the Laravel Database component
$conn = $capsule->connection();
ci()->load->model('install_m');
// Basic installation done with this PDO connection
ci()->install_m->set_default_structure($conn, $user, $db);
// Write the database file
if ( ! $this->write_db_file($db)) {
throw new InstallerException('Failed to write database.php file.');
}
// Write the config file.
if ( ! $this->write_config_file()) {
throw new InstallerException('Failed to write config.php file.');
}
return $conn;
}
/**
* Writes the database file based on the provided database settings
*
* @param array $db The database connection information
*/
public function write_db_file($db)
{
$replace = array(
'{driver}' => $db['driver'],
'{hostname}' => $db['hostname'],
'{port}' => $db['port'],
'{database}' => $db['database'],
'{username}' => $db['username'],
'{password}' => $db['password']
);
return $this->_write_file_vars('../system/cms/config/database.php', './assets/config/database.php', $replace);
}
/**
* Writes the config file.n
*
* @return bool
*/
public function write_config_file()
{
$server_name = ci()->session->userdata('http_server');
$supported_servers = ci()->config->item('supported_servers');
// Able to use clean URLs?
$index_page = ($supported_servers[$server_name]['rewrite_support'] !== false) ? '' : 'index.php';
return $this->_write_file_vars('../system/cms/config/config.php', './assets/config/config.php', array('{index}' => $index_page));
}
/**
* Write a file by replacing the placeholders found in a template file with values provided.
*
* @param string $destination The path to where the file should be written.
* @param string $template The path to the template file.
* @param array $replacements Contains 'placeholder => value' pairs for the replacements
*
* @return bool
*/
private function _write_file_vars($destination, $template, $replacements)
{
$str = str_replace(array_keys($replacements), $replacements, file_get_contents($template));
return (file_put_contents($destination, $str) !== false);
}
}
class InstallerException extends Exception {}