Controller
>>> [!note] Migrated issue
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<!-- Migrated from issue #1389042. -->
Reported by: [hinikato](https://www.drupal.org/user/680524)
>>>
<h3>Update: this project has moved to full drupal project!</h3>
<p><a href="http://drupal.org/project/controller">http://drupal.org/project/controller</a> - new project location.</p>
<p>Thanks for all who reviewed it!</p>
<h3>Description</h3>
<p>Controller is module that enables Page Controller pattern for your pages.<br>
Page Controller is just class that have set of actions. Each action is a<br>
separate method that will be called for specified path.</p>
<p>For example if you have the 'foo/bar' path (URI), then you can create a new<br>
class called FooBarPageController and myAction method (you can use other names<br>
of course). This method will be called for the '<a href="http://host/foo/bar">http://host/foo/bar</a>' address.</p>
<h3>Example</h3>
<p>Let's say that you have the 'mymodule' module and you want to call the<br>
FooBarPageController::myAction() method for the 'foo/bar' path. To do that<br>
do the following:<br>
1. Create new directory mymodule/controllers/.</p>
<p>2. Create new file called FooBarPageController.php inside this directory.</p>
<p>3. Add the following code into it:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #FF8000">/**<br> * My test controller class.<br> */<br></span><span style="color: #007700">class </span><span style="color: #0000BB">MymoduleFooBarPageController </span><span style="color: #007700">{<br> </span><span style="color: #FF8000">/**<br> * This method that will be called for the 'foo/bar' path.<br> *<br> * @path => 'foo/bar',<br> * @access arguments => array('access arguments'),<br> * @title => 'My test page',<br> */<br> </span><span style="color: #007700">function </span><span style="color: #0000BB">myAction</span><span style="color: #007700">() {<br> return </span><span style="color: #0000BB">sprintf</span><span style="color: #007700">(</span><span style="color: #DD0000">'<pre>%s</pre>'</span><span style="color: #007700">, </span><span style="color: #0000BB">__METHOD__ </span><span style="color: #007700">. </span><span style="color: #DD0000">' called with args: '<br> </span><span style="color: #007700">. </span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">func_get_args</span><span style="color: #007700">(), </span><span style="color: #0000BB">1</span><span style="color: #007700">));<br> }<br>}<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>Please note your attention on the following concepts:<br>
- The module name is 'mymodule' and the Controller class should be prefixed<br>
with the CamelCased version of the module name with capital first latter. For<br>
our example it is 'Mymodule' prefix. If the 'controller_use_ns' variable is on<br>
(that you can change on the '/admin/settings/controller' page) the prefix will<br>
be used as namespace, so the the full class name will be<br>
\Mymodule\FooBarPageController.<br>
- In the annotations (PHP comments) for the myAction() method we defined items<br>
like @path, @access arguments and the @title. You can define other items that<br>
can be defined in the hook_menu() and that described here:<br>
<a href="http://api.drupal.org/api/drupal/developer!hooks!core.php/function/hook_menu/6">http://api.drupal.org/api/drupal/developer!hooks!core.php/function/hook_menu/6</a><br>
It is the @title callback, @title arguments, @description, @page arguments etc.<br>
There is the only one new item @path that inroduced by the 'controller' module.<br>
The value of the each item is PHP code that can optionally end with the ; or<br>
, character (it may be useful if you have a habit to enter them inside your<br>
PHP code).</p>
<p>4. Define the hook_controller_api() as follows:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #FF8000">/**<br> * Implements hook_controller_api().<br> */<br></span><span style="color: #007700">function </span><span style="color: #0000BB">mymodule_controller_api</span><span style="color: #007700">() {<br> return </span><span style="color: #DD0000">'2.x'</span><span style="color: #007700">;<br>}<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>5. After that clear the menu cache and navigate the 'foo/bar' path in your<br>
browser. Then you will see that the MymoduleFooBarPageController::myAction()<br>
will be called.</p>
<p>6. Format of the annotations is very simple:<br>
just not add the quotes ('') for key and add the @ before it. For example the:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #DD0000">'page arguments' </span><span style="color: #007700">=> array(</span><span style="color: #DD0000">'foo' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'bar'</span><span style="color: #007700">),<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>may be rewritten with PHP comments as follows:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #FF8000">/**<br> * @page arguments => array('foo' => 'bar'),<br> */<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>Each line may optionally end with the semicolon (;) or comma (,).</p>
<h3>Other way to define your controllers</h3>
<p>There is an other way that can be used to define your controllers. For example<br>
above the FooBarPageController::myAction() method can be defined in the<br>
hook_menu() as follows:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #FF8000">/**<br> * @file<br> * Your description...<br> */<br><br>/**<br> * Your implementation of the hook_menu();<br> */<br></span><span style="color: #007700">function </span><span style="color: #0000BB">mymodule_menu</span><span style="color: #007700">() {<br> </span><span style="color: #0000BB">$items </span><span style="color: #007700">= array();<br> </span><span style="color: #0000BB">$items</span><span style="color: #007700">[</span><span style="color: #DD0000">'foo/bar'</span><span style="color: #007700">] = array(<br> </span><span style="color: #DD0000">'action' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'FooBarPageController::myAction'</span><span style="color: #007700">,<br> </span><span style="color: #DD0000">'access arguments' </span><span style="color: #007700">=> array(</span><span style="color: #DD0000">'access content'</span><span style="color: #007700">),<br> </span><span style="color: #DD0000">'type' </span><span style="color: #007700">=> </span><span style="color: #0000BB">MENU_CALLBACK</span><span style="color: #007700">,<br> );<br> return </span><span style="color: #0000BB">$items</span><span style="color: #007700">;<br>}<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>In this definition please note on the new 'action' key. It is a special item<br>
that will be handled by the controller module. There is no 'path' item here<br>
because the path defined as array key.</p>
<h3>How it works?</h3>
<p>In case of defining the menu items through annotations the 'controller'<br>
module will collect and parse the annotations and rewrite them with using<br>
of the new 'action' item. After that the 'controller' module will expand<br>
the 'action' definition into other item that follows Drupal's conventions.<br>
For example the following definition:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #FF8000">/**<br> * Your implementation of the hook_menu();<br> */<br></span><span style="color: #007700">function </span><span style="color: #0000BB">mymodule_menu</span><span style="color: #007700">() {<br> </span><span style="color: #0000BB">$items </span><span style="color: #007700">= array();<br> </span><span style="color: #0000BB">$items</span><span style="color: #007700">[</span><span style="color: #DD0000">'foo/bar'</span><span style="color: #007700">] = array(<br> </span><span style="color: #DD0000">'action' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'FooBarPageController::myAction'</span><span style="color: #007700">,<br> </span><span style="color: #DD0000">'access arguments' </span><span style="color: #007700">=> array(</span><span style="color: #DD0000">'access content'</span><span style="color: #007700">),<br> </span><span style="color: #DD0000">'type' </span><span style="color: #007700">=> </span><span style="color: #0000BB">MENU_CALLBACK</span><span style="color: #007700">,<br> );<br> return </span><span style="color: #0000BB">$items</span><span style="color: #007700">;<br>}<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>will be expanded to the following definition:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #FF8000">/**<br> * Your implementation of the hook_menu();<br> */<br></span><span style="color: #007700">function </span><span style="color: #0000BB">mymodule_menu</span><span style="color: #007700">() {<br> </span><span style="color: #0000BB">$items </span><span style="color: #007700">= array();<br> </span><span style="color: #0000BB">$my_file_path </span><span style="color: #007700">= </span><span style="color: #0000BB">drupal_get_path</span><span style="color: #007700">(</span><span style="color: #DD0000">'module'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mymodule'</span><span style="color: #007700">)<br> . </span><span style="color: #DD0000">'/controllers/FooBarPageController.php'</span><span style="color: #007700">;<br> </span><span style="color: #0000BB">$items</span><span style="color: #007700">[</span><span style="color: #DD0000">'foo/bar'</span><span style="color: #007700">] = array(<br> </span><span style="color: #DD0000">'page callback' </span><span style="color: #007700">=> </span><span style="color: #DD0000">'controller_menu_handler'</span><span style="color: #007700">,<br> </span><span style="color: #DD0000">'page arguments' </span><span style="color: #007700">=> array(</span><span style="color: #DD0000">'MymoduleFooBarPageController::myAction'</span><span style="color: #007700">),<br> </span><span style="color: #DD0000">'file' </span><span style="color: #007700">=> </span><span style="color: #0000BB">$my_file_path</span><span style="color: #007700">,<br> </span><span style="color: #DD0000">'access arguments' </span><span style="color: #007700">=> array(</span><span style="color: #DD0000">'access content'</span><span style="color: #007700">),<br> </span><span style="color: #DD0000">'type' </span><span style="color: #007700">=> </span><span style="color: #0000BB">MENU_CALLBACK</span><span style="color: #007700">,<br> );<br> return </span><span style="color: #0000BB">$items</span><span style="color: #007700">;<br>}<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>When the 'foo/bar' path will be navigated the 'controller_menu_handler'<br>
function will be called when in turns will create an instance of the<br>
MymoduleFooBarPageController and will call the myAction() method. </p>
<h3>Links</h3>
<p>1. <a rel="nofollow" href="http://drupal.org/sandbox/hinikato/1389028">Sandbox link</a></p>
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