1: <?php
 2: 
 3: /**
 4:  * This file is part of the Nette Framework (https://nette.org)
 5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 6:  */
 7: 
 8: namespace Nette\Application;
 9: 
10: use Nette;
11: 
12: 
13: /**
14:  * Link generator.
15:  */
16: class LinkGenerator
17: {
18:     use Nette\SmartObject;
19: 
20:     /** @var IRouter */
21:     private $router;
22: 
23:     /** @var Nette\Http\Url */
24:     private $refUrl;
25: 
26:     /** @var IPresenterFactory|null */
27:     private $presenterFactory;
28: 
29: 
30:     public function __construct(IRouter $router, Nette\Http\Url $refUrl, IPresenterFactory $presenterFactory = null)
31:     {
32:         $this->router = $router;
33:         $this->refUrl = $refUrl;
34:         $this->presenterFactory = $presenterFactory;
35:     }
36: 
37: 
38:     /**
39:      * Generates URL to presenter.
40:      * @param  string   destination in format "[[[module:]presenter:]action] [#fragment]"
41:      * @return string
42:      * @throws UI\InvalidLinkException
43:      */
44:     public function link($dest, array $params = [])
45:     {
46:         if (!preg_match('~^([\w:]+):(\w*+)(#.*)?()\z~', $dest, $m)) {
47:             throw new UI\InvalidLinkException("Invalid link destination '$dest'.");
48:         }
49:         list(, $presenter, $action, $frag) = $m;
50: 
51:         try {
52:             $class = $this->presenterFactory ? $this->presenterFactory->getPresenterClass($presenter) : null;
53:         } catch (InvalidPresenterException $e) {
54:             throw new UI\InvalidLinkException($e->getMessage(), 0, $e);
55:         }
56: 
57:         if (is_subclass_of($class, UI\Presenter::class)) {
58:             if ($action === '') {
59:                 $action = UI\Presenter::DEFAULT_ACTION;
60:             }
61:             if (
62:                 method_exists($class, $method = $class::formatActionMethod($action))
63:                 || method_exists($class, $method = $class::formatRenderMethod($action))
64:             ) {
65:                 UI\Presenter::argsToParams($class, $method, $params, [], $missing);
66:                 if ($missing) {
67:                     $rp = $missing[0];
68:                     throw new UI\InvalidLinkException("Missing parameter \${$rp->getName()} required by {$rp->getDeclaringClass()->getName()}::{$rp->getDeclaringFunction()->getName()}()");
69:                 }
70: 
71:             } elseif (array_key_exists(0, $params)) {
72:                 throw new UI\InvalidLinkException("Unable to pass parameters to action '$presenter:$action', missing corresponding method.");
73:             }
74:         }
75: 
76:         if ($action !== '') {
77:             $params[UI\Presenter::ACTION_KEY] = $action;
78:         }
79: 
80:         $url = $this->router->constructUrl(new Request($presenter, null, $params), $this->refUrl);
81:         if ($url === null) {
82:             unset($params[UI\Presenter::ACTION_KEY]);
83:             $params = urldecode(http_build_query($params, null, ', '));
84:             throw new UI\InvalidLinkException("No route for $dest($params)");
85:         }
86:         return $url . $frag;
87:     }
88: }
89: