action.php

<?php

class action_plugin_nspages extends DokuWiki_Action_Plugin {

    /**
     * Register its handlers with the dokuwiki's event controller
     */
    function register(Doku_Event_Handler $controller) {
        $controller->register_hook('TOOLBAR_DEFINE', 'AFTER',  $this, 'insert_button', array());
        $controller->register_hook('PLUGIN_POPULARITY_DATA_SETUP', 'AFTER', $this, 'usage_data');
    }

    function insert_button(& $event, $param) {
      $event->data[] = array (
          'type' => 'insert',
          'title' => 'nspages',
          'icon' => '../../plugins/nspages/images/tb_nspages.png',
          'insert' => $this->getConf('toolbar_inserted_markup')
          );
    }

    function usage_data(&$event){
      $plugin_info = $this->getInfo();
      $event->data['nspages']['version'] = $plugin_info['date'];
      $event->data['nspages']['legacyModificationDateSyntax'] = $this->used_legacy_syntax_not_too_long_ago() ? 'true' : 'false';
    }

    private function used_legacy_syntax_not_too_long_ago(){
      $legacySyntax = io_readFile(action_plugin_nspages::legacySyntaxFilename());
      if ($legacySyntax){
        if ($legacySyntax > time() - 365 * 86400){
          return true;
        } else {
          unlink(action_plugin_nspages::legacySyntaxFilename());
        }
      }
    }

    static function logUseLegacySyntax(){
      $file = action_plugin_nspages::legacySyntaxFilename();
      io_saveFile($file, time());
    }

    static function legacySyntaxFilename(){
      global $conf;
      return $conf['savedir'] . '/nspages_legacy_syntax.txt';
    }

}