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Adding coordinator (jelix core class) plugins allow you to customize different steps of the processing of any action.
You can execute some code, at process start, before action execution, after action execution (but before display), at process end.
Note : Coordinator plugins are commonly named plugin coord in Jelix.
Activate a coord. plugin ¶
You need to modify entry point configuration file. for example /var/config/index/config.ini.php if it is for index.php entry point :
- add its repository e.g the parent directory of your plugin one to configuration. set pluginsPath option as this purpose.
- add your plugn name to
[plugins]sections and assign it, its configuration file if any
Example : your plugin is located in foo folder of <application name>/plugins/coord/ your config file should look like :
pluginsPath = app:plugins/
[plugins]
foo = foo.plugin.ini.php
foo.plugin.ini.php is a dedicated config file. Its content and structure depends only on the plugin. Having a plugin configuration file is not required. In that case, you should assign 1 to your plugin name :
[plugins]
foo = 1
If you use several plugins for the coordinator, the order in wich they appear in plugins configuration section is important: jelix will follow this order to instantiate and call the plugins. So be careful about this order, and read the documentation of the plugins you use.
Plugin configuration ¶
In order to configure a plugin, you might have declared a specific configuration file (see above). It is an ini file, located in var/config/. Its content will be passed as argument to your plugin constructor as an array.
Plugin parameters ¶
As said before, your plugin might need some options or parameters. Those can be set in a config file but also within controllers. Indeed, your plugin might do different treatments for each controller actions.
As an example, jAuth plugin checks if an action needs authentication or not. Each controller will set a parameter for each action indicating wether authentication is needed.
There is a member of controller to serve this purpose : pluginParams. It is an associative array. its keys are method names (or actions names) and its value s are arrays setting all plugins parameters. * key covers all methods or actions.
Code Example :
public $pluginParams = array(
'*'=>array('auth.required'=>false)
);
Result : every actions has a parameter auth.required set to false.
Plugin development ¶
Concretely a plugin must implement jICoordPlugin interface. And so declare the following methods :
public function __construct($config);
public function beforeAction($params);
public function beforeOutput();
public function afterProcess ();
class constructor receive its plugin configuration.
beforeAction method received plugin parameters set by controllers. It can return null if all is ok or an action selector, jSelectorAct, if another action must be executed (sort of redirection).
beforeOutput will be called after action execution.
afterProcess method will be called at the end of coordinator processing, thus just before display.
this class must be located in a plugins repository. plugins/ application folder or a plugins/ module folder are possible candidates. See page on plugins.
For an example plugin :
- plugin folder will be plugins/coord/example/
- its file will be plugins/coord/example/example.coord.php
- its class will be exampleCoordPlugin and will implement jICoordPlugin interface
