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<?php |
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/** |
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* This file is part of the Nette Framework (http://nette.org) |
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* |
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* Copyright (c) 2004 David Grudl (http://davidgrudl.com) |
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* |
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* For the full copyright and license information, please view |
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* the file license.txt that was distributed with this source code. |
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*/ |
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namespace Nette\Application\UI; |
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use Nette; |
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/** |
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* Web form adapted for Presenter. |
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* |
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* @author David Grudl |
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* |
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* @property-read Presenter $presenter |
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*/ |
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class Form extends Nette\Forms\Form implements ISignalReceiver |
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{ |
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/** |
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* Application form constructor. |
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*/ |
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public function __construct(Nette\ComponentModel\IContainer $parent = null, $name = null) |
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{ |
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parent::__construct(); |
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$this->monitor('Nette\Application\UI\Presenter'); |
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if ($parent !== NULL) { |
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$parent->addComponent($this, $name); |
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} |
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} |
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/** |
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* Returns the presenter where this component belongs to. |
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* @param bool throw exception if presenter doesn't exist? |
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* @return Nette\ComponentModel\IComponent |
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*/ |
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public function getPresenter($need = true) |
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{ |
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return $this->lookup('Nette\Application\UI\Presenter', $need); |
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} |
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/** |
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* This method will be called when the component (or component's parent) |
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* becomes attached to a monitored object. Do not call this method yourself. |
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* @param Nette\ComponentModel\IComponent |
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* @return void |
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*/ |
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protected function attached($presenter) |
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{ |
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if ($presenter instanceof Presenter) { |
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$name = $this->lookupPath('Nette\Application\UI\Presenter'); |
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if (!isset($this->getElementPrototype()->id)) { |
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$this->getElementPrototype()->id = 'frm-'.$name; |
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} |
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if (!$this->getAction()) { |
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$this->setAction(new Link( |
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$presenter, |
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$name.self::NAME_SEPARATOR.'submit!', |
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array() |
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)); |
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} |
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if (iterator_count($this->getControls()) && $this->isSubmitted()) { |
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foreach ($this->getControls() as $control) { |
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if (!$control->isDisabled()) { |
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$control->loadHttpData(); |
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} |
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} |
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} |
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} |
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parent::attached($presenter); |
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} |
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/** |
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* Tells if the form is anchored. |
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* @return bool |
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*/ |
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public function isAnchored() |
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{ |
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return (bool) $this->getPresenter(false); |
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} |
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/** |
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* Internal: returns submitted HTTP data or NULL when form was not submitted. |
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* @return array|NULL |
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*/ |
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protected function receiveHttpData() |
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{ |
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$presenter = $this->getPresenter(); |
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if (!$presenter->isSignalReceiver($this, 'submit')) { |
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return; |
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} |
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$isPost = $this->getMethod() === self::POST; |
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$request = $presenter->getRequest(); |
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if ($request->isMethod('forward') || $request->isMethod('post') !== $isPost) { |
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return; |
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} |
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if ($isPost) { |
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return Nette\Utils\Arrays::mergeTree($request->getPost(), $request->getFiles()); |
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} else { |
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return $request->getParameters(); |
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} |
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} |
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/********************* interface ISignalReceiver ****************d*g**/ |
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/** |
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* This method is called by presenter. |
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* @param string |
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* @return void |
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*/ |
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public function signalReceived($signal) |
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{ |
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if ($signal === 'submit') { |
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if (!$this->getPresenter()->getRequest()->hasFlag(Nette\Application\Request::RESTORED)) { |
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$this->fireEvents(); |
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} |
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} else { |
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$class = get_class($this); |
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throw new BadSignalException("Missing handler for signal '$signal' in $class."); |
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} |
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} |
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} |
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ufik /
WebCMS2
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: