72 lines
2.4 KiB
PHP
72 lines
2.4 KiB
PHP
<?php
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/*
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* Copyright (c) 2022. Micha Espey <tracer@24unix.net>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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*/
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namespace App\Service;
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use App\Entity\Route;
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use Closure;
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/*
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* A small router implementation for the address book demo.
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* Currently it doesn't handle GET requests, as not needed.
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* But if I reuse the code in my bind Api I'll enable GET as well.
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*/
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class Router
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{
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private array $routes;
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/*
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* This method takes a route like /admin/users/{user} and creates a regex to match on call
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* More complex routes as /posts/{thread}/show/{page} are supported as well.
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*/
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function addRoute(string $name, string $route, Closure $callback): void
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{
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// check for parameters
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preg_match_all(pattern: "/(?<={).+?(?=})/", subject: $route, matches: $matches);
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$parameters = $matches[0];
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// create regex for route:
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$regex = preg_replace(pattern: '/(?<={).+?(?=})/', replacement: '(.*?)', subject: $route);
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// code below is ugly, better match including the braces
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$regex = str_replace(search: '{', replace: '', subject: $regex);
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$regex = str_replace(search: '}', replace: '', subject: $regex);
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$regex = '/^' . str_replace(search: "/", replace: '\\/', subject: $regex) . '$/i';
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$route = new Route(name: $name, route: $route, regEx: $regex, parameters: $parameters, callback: $callback);
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$this->routes[] = $route;
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}
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/*
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* Check if there is a known route and executes the callback.
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* Currently no 404 handling.
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*/
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public function handleRouting(): void
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{
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$requestUri = $_SERVER['REQUEST_URI'];
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foreach ($this->routes as $route) {
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if (preg_match(pattern: $route->getRegex(), subject: $requestUri, matches: $matches)) {
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$parameters = [];
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foreach ($route->getParameters() as $id => $parameter) {
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$parameters[$parameter] = $matches[$id +1];
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}
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// PHP is mad about named parameters in call_user_func
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// Uncaught Error: Unknown named parameter $args in …
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// But PHPStorm seems happy without them. So what?
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call_user_func($route->getCallback(), $parameters);
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return;
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}
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}
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// Throw a 404 result later …
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die("Invalid route: $requestUri");
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}
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} |