<?php

use dokuwiki\Extension\ActionPlugin;
use dokuwiki\Extension\EventHandler;
use dokuwiki\Extension\Event;

/**
 * Example Action Plugin: Example Component.

 *
 * @author Samuele Tognini <samuele@cli.di.unipi.it>
 */

class action_plugin_example extends ActionPlugin {

    /**
     * Register its handlers with the DokuWiki's event controller
     * 
     * @param EventHandler $controller event controller object
     */
    public function register(EventHandler $controller) {
        $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', 
                                   $this, 'hookJsScript');
    }

    /**
     * Hook js script into page headers.
     * 
     * @param Event $event event object
     * 
     * @author Samuele Tognini <samuele@cli.di.unipi.it>
     */
    public function hookJsScript(Event $event) {
        $event->data['script'][] = [
            'type'    => 'text/javascript',
            'charset' => 'utf-8',
            '_data'   => '',
            'src'     => DOKU_PLUGIN . 'example/example.js'
        ];
    }
}