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system/engine/loader.php
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317
system/engine/loader.php
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<?php
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/**
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* @package OpenCart
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* @author Daniel Kerr
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* @copyright Copyright (c) 2005 - 2022, OpenCart, Ltd. (https://www.opencart.com/)
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* @license https://opensource.org/licenses/GPL-3.0
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* @link https://www.opencart.com
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*/
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namespace Opencart\System\Engine;
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/**
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* Class Loader
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*/
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class Loader {
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/**
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* @var object|\Opencart\System\Engine\Registry
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*/
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protected $registry;
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/**
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* Constructor
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*
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* @param object $registry
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*/
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public function __construct(\Opencart\System\Engine\Registry $registry) {
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$this->registry = $registry;
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}
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/**
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* __get
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*
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* https://www.php.net/manual/en/language.oop5.overloading.php#object.get
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*
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* @param string $key
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*
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* @return object
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*/
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public function __get(string $key): object {
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return $this->registry->get($key);
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}
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/**
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* __set
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*
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* https://www.php.net/manual/en/language.oop5.overloading.php#object.set
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*
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* @param string $key
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* @param object $value
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*
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* @return void
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*/
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public function __set(string $key, object $value): void {
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$this->registry->set($key, $value);
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}
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/**
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* Controller
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*
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* https://wiki.php.net/rfc/variadics
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*
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* @param string $route
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* @param array $data
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*
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* @return mixed
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*/
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public function controller(string $route, mixed ...$args): mixed {
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// Sanitize the call
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$route = preg_replace('/[^a-zA-Z0-9_|\/\.]/', '', str_replace('|', '.', $route));
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$output = '';
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// Keep the original trigger
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$action = new \Opencart\System\Engine\Action($route);
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while ($action) {
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$route = $action->getId();
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// Trigger the pre events
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$result = $this->event->trigger('controller/' . $route . '/before', [&$route, &$args]);
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if ($result instanceof \Opencart\System\Engine\Action) {
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$action = $result;
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}
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// Execute action
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$result = $action->execute($this->registry, $args);
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// Make action a non-object so it's not infinitely looping
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$action = '';
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// Action object returned then we keep the loop going
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if ($result instanceof \Opencart\System\Engine\Action) {
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$action = $result;
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}
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// If not an object then it's the output
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if (!$action) {
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$output = $result;
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}
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// Trigger the post events
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$result = $this->event->trigger('controller/' . $route . '/after', [&$route, &$args, &$output]);
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if ($result instanceof \Opencart\System\Engine\Action) {
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$action = $result;
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}
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}
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return $output;
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}
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/**
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* Model
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*
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* @param string $route
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*
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* @return void
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*/
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public function model(string $route): void {
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// Sanitize the call
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$route = preg_replace('/[^a-zA-Z0-9_\/]/', '', $route);
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// Converting a route path to a class name
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$class = 'Opencart\\' . $this->config->get('application') . '\Model\\' . str_replace(['_', '/'], ['', '\\'], ucwords($route, '_/'));
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// Create a key to store the model object
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$key = 'model_' . str_replace('/', '_', $route);
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// Check if the requested model is already stored in the registry.
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if (!$this->registry->has($key)) {
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if (class_exists($class)) {
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$model = new $class($this->registry);
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$proxy = new \Opencart\System\Engine\Proxy();
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foreach (get_class_methods($model) as $method) {
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if ((substr($method, 0, 2) != '__') && is_callable($class, $method)) {
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// Grab args using function because we don't know the number of args being passed.
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// https://www.php.net/manual/en/functions.arguments.php#functions.variable-arg-list
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// https://wiki.php.net/rfc/variadics
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$proxy->{$method} = function (mixed &...$args) use ($route, $model, $method): mixed {
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$route = $route . '/' . $method;
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$output = '';
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// Trigger the pre events
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$result = $this->event->trigger('model/' . $route . '/before', [&$route, &$args]);
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if ($result) {
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$output = $result;
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}
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if (!$output) {
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// Get the method to be used
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$callable = [$model, $method];
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if (is_callable($callable)) {
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$output = call_user_func_array($callable, $args);
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} else {
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throw new \Exception('Error: Could not call model/' . $route . '!');
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}
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}
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// Trigger the post events
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$result = $this->event->trigger('model/' . $route . '/after', [&$route, &$args, &$output]);
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if ($result) {
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$output = $result;
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}
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return $output;
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};
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}
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}
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$this->registry->set($key, $proxy);
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} else {
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throw new \Exception('Error: Could not load model ' . $class . '!');
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}
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}
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}
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/**
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* View
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*
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* Loads the template file and generates the html code.
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*
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* @param string $route
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* @param array $data
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* @param string $code
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*
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* @return string
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*/
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public function view(string $route, array $data = [], string $code = ''): string {
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// Sanitize the call
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$route = preg_replace('/[^a-zA-Z0-9_\/]/', '', $route);
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$output = '';
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// Trigger the pre events
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$result = $this->event->trigger('view/' . $route . '/before', [&$route, &$data, &$code]);
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if ($result) {
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$output = $result;
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}
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if (!$output) {
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// Make sure it's only the last event that returns an output if required.
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$output = $this->template->render($route, $data, $code);
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}
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// Trigger the post events
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$result = $this->event->trigger('view/' . $route . '/after', [&$route, &$data, &$output]);
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if ($result) {
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$output = $result;
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}
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return $output;
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}
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/**
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* Language
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*
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* @param string $route
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* @param string $prefix
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* @param string $code
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*
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* @return array
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*/
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public function language(string $route, string $prefix = '', string $code = ''): array {
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// Sanitize the call
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$route = preg_replace('/[^a-zA-Z0-9_\-\/]/', '', $route);
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$output = [];
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// Trigger the pre events
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$result = $this->event->trigger('language/' . $route . '/before', [&$route, &$prefix, &$code]);
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if ($result) {
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$output = $result;
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}
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if (!$output) {
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$output = $this->language->load($route, $prefix, $code);
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}
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// Trigger the post events
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$result = $this->event->trigger('language/' . $route . '/after', [&$route, &$prefix, &$code, &$output]);
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if ($result) {
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$output = $result;
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}
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return $output;
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}
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/**
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* Config
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*
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* @param string $route
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*
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* @return array
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*/
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public function config(string $route): array {
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// Sanitize the call
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$route = preg_replace('/[^a-zA-Z0-9_\-\/]/', '', $route);
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$output = [];
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// Trigger the pre events
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$result = $this->event->trigger('config/' . $route . '/before', [&$route]);
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if ($result) {
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$output = $result;
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}
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if (!$output) {
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$output = $this->config->load($route);
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}
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// Trigger the post events
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$result = $this->event->trigger('config/' . $route . '/after', [&$route, &$output]);
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if ($result) {
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$output = $result;
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}
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return $output;
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}
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/**
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* Helper
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*
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* @param string $route
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*
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* @return void
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*/
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public function helper(string $route): void {
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$route = preg_replace('/[^a-zA-Z0-9_\/]/', '', $route);
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if (!str_starts_with($route, 'extension/')) {
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$file = DIR_SYSTEM . 'helper/' . $route . '.php';
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} else {
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$parts = explode('/', substr($route, 10));
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$code = array_shift($parts);
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$file = DIR_EXTENSION . $code . '/system/helper/' . implode('/', $parts) . '.php';
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}
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if (is_file($file)) {
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include_once($file);
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} else {
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throw new \Exception('Error: Could not load helper ' . $route . '!');
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}
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}
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}
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