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<?php
/**
* @package OpenCart
* @author Daniel Kerr
* @copyright Copyright (c) 2005 - 2017, OpenCart, Ltd. (https://www.opencart.com/)
* @license https://opensource.org/licenses/GPL-3.0
* @link https://www.opencart.com
*/
/**
* Loader class
*/
namespace Opencart\System\Engine;
use \Opencart\System\Engine\Action as Action;
class Loader {
protected $registry;
/**
* __construct
*
* @param object $registry
*/
public function __construct(\Opencart\System\Engine\Registry $registry) {
$this->registry = $registry;
}
/**
* __get
*
* https://www.php.net/manual/en/language.oop5.overloading.php#object.get
*
* @param string $key
*
* @return object
*/
public function __get(string $key): object {
return $this->registry->get($key);
}
/**
* __set
*
* https://www.php.net/manual/en/language.oop5.overloading.php#object.set
*
* @param string $key
* @param object $value
*
* @return object
*/
public function __set(string $key, object $value): void {
$this->registry->set($key, $value);
}
/**
* Controller
*
* https://wiki.php.net/rfc/variadics
*
* @param string $route
* @param array $data
*
* @return mixed
*/
public function controller(string $route, mixed ...$args): mixed {
// Sanitize the call
$route = preg_replace('/[^a-zA-Z0-9_|\/]/', '', $route);
// Keep the original trigger
$trigger = $route;
// Trigger the pre events
$this->event->trigger('controller/' . $trigger . '/before', [&$route, &$args]);
// Make sure its only the last event that returns an output if required.
$action = new \Opencart\System\Engine\Action($route);
$output = $action->execute($this->registry, $args);
// Trigger the post events
$this->event->trigger('controller/' . $trigger . '/after', [&$route, &$args, &$output]);
return $output;
}
/**
* Model
*
* @param string $route
*/
public function model(string $route): void {
// Sanitize the call
$route = preg_replace('/[^a-zA-Z0-9_\/]/', '', $route);
// Check if the requested model is already stored in the registry.
if (!$this->registry->has('model_' . str_replace('/', '_', $route))) {
// Converting a route path to a class name
$class = 'Opencart\\' . $this->config->get('application') . '\Model\\' . str_replace(['_', '/'], ['', '\\'], ucwords($route, '_/'));
if (class_exists($class)) {
$proxy = new \Opencart\System\Engine\Proxy();
// Overriding models is a little harder so we have to use PHP's magic methods.
foreach (get_class_methods($class) as $method) {
if ((substr($method, 0, 2) != '__') && is_callable($class, $method)) {
$proxy->{$method} = $this->callback($route . '/' . $method);
}
}
$this->registry->set('model_' . str_replace('/', '_', $route), $proxy);
} else {
throw new \Exception('Error: Could not load model ' . $class . '!');
}
}
}
/**
* View
*
* Loads the template file and generates the html code.
*
* @param string $route
* @param array $data
*
* @return string
*/
public function view(string $route, array $data = [], string $code = ''): string {
// Sanitize the call
$route = preg_replace('/[^a-zA-Z0-9_\/]/', '', $route);
// Keep the original trigger
$trigger = $route;
// Trigger the pre events
$this->event->trigger('view/' . $trigger . '/before', [&$route, &$data, &$code]);
// Make sure its only the last event that returns an output if required.
$output = $this->template->render($route, $data, $code);
// Trigger the post events
$this->event->trigger('view/' . $trigger . '/after', [&$route, &$data, &$output]);
return $output;
}
/**
* Language
*
* @param string $route
* @param string $key
*
* @return array
*/
public function language(string $route, string $prefix = '', string $code = ''): array {
// Sanitize the call
$route = preg_replace('/[^a-zA-Z0-9_\-\/]/', '', $route);
// Keep the original trigger
$trigger = $route;
$this->event->trigger('language/' . $trigger . '/before', [&$route, &$prefix, &$code]);
$data = $this->language->load($route, $prefix, $code);
$this->event->trigger('language/' . $trigger . '/after', [&$route, &$prefix, &$code, &$data]);
return $data;
}
/**
* Library
*
* Loads library classes
*
* @param string $route The path to the library file.
* @param string $args A list of arguments to pass into the library object being created.
*/
public function library(string $route, array &...$args): object {
// Sanitize the call
$route = preg_replace('/[^a-zA-Z0-9_\/]/', '', $route);
// Keep the original trigger
$trigger = $route;
$this->event->trigger('library/' . $trigger . '/before', [&$route, &$args]);
$class = 'Opencart\System\Library\\' . str_replace('/', '\\', $route);
if (class_exists($class)) {
$library = new $class(...$args);
// Create a key to store the library object
$this->registry->set(str_replace('/', '_', $route), $library);
} else {
throw new \Exception('Error: Could not load library ' . $route . '!');
}
$this->event->trigger('library/' . $trigger . '/after', [&$route, &$args]);
return $library;
}
/**
* Helper
*
* @param string $route
*/
public function helper(string $route): void {
$route = preg_replace('/[^a-zA-Z0-9_\/]/', '', $route);
$file = DIR_SYSTEM . 'helper/' . $route . '.php';
//$file = 'Opencart\System\Helper\\' . str_replace('/', '\\', $route);
if (is_file($file)) {
include_once($file);
} else {
throw new \Exception('Error: Could not load helper ' . $route . '!');
}
}
/**
* Config
*
* @param string $route
*/
public function config(string $route): array {
// Sanitize the call
$route = preg_replace('/[^a-zA-Z0-9_\-\/]/', '', $route);
// Keep the original trigger
$trigger = $route;
$this->event->trigger('config/' . $trigger . '/before', [&$route]);
$data = $this->config->load($route);
$this->event->trigger('config/' . $trigger . '/after', [&$route, &$data]);
return $data;
}
/**
* Callback
*
* https://www.php.net/manual/en/class.closure.php
*
* @param string $route
*
* @return closure
*/
protected function callback(string $route): callable {
return function (mixed &...$args) use ($route) {
// Grab args using function because we don't know the number of args being passed.
// https://www.php.net/manual/en/functions.arguments.php#functions.variable-arg-list
// https://wiki.php.net/rfc/variadics
$route = preg_replace('/[^a-zA-Z0-9_\/]/', '', $route);
// Keep the original trigger
$trigger = $route;
// Trigger the pre events
$result = $this->event->trigger('model/' . $trigger . '/before', [&$route, &$args]);
if ($result) {
$output = $result;
} else {
// Create a key to store the model object
$key = substr($route, 0, strrpos($route, '/'));
// Check if the model has already been initialised or not
if (!$this->registry->has($key)) {
// Create the class name from the key
$class = 'Opencart\\' . $this->config->get('application') . '\Model\\' . str_replace(['_', '/'], ['', '\\'], ucwords($key, '_/'));
$model = new $class($this->registry);
$this->registry->set($key, $model);
} else {
$model = $this->registry->get($key);
}
// Get the method to be used
$method = substr($route, strrpos($route, '/') + 1);
$callable = [$model, $method];
if (is_callable($callable)) {
$output = call_user_func_array($callable, $args);
} else {
throw new \Exception('Error: Could not call model/' . $route . '!');
}
}
// Trigger the post events
$result = $this->event->trigger('model/' . $trigger . '/after', [&$route, &$args, &$output]);
if ($result) {
$output = $result;
}
return $output;
};
}
}