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   1  <?php
   2  
   3  namespace dokuwiki\Action;
   4  
   5  use dokuwiki\Action\Exception\ActionAbort;
   6  use dokuwiki\Extension\Event;
   7  
   8  /**
   9   * Class Redirect
  10   *
  11   * Used to redirect to the current page with the last edited section as a target if found
  12   *
  13   * @package dokuwiki\Action
  14   */
  15  class Redirect extends AbstractAliasAction
  16  {
  17      /**
  18       * Redirect to the show action, trying to jump to the previously edited section
  19       *
  20       * @triggers ACTION_SHOW_REDIRECT
  21       * @throws ActionAbort
  22       */
  23      public function preProcess()
  24      {
  25          global $PRE;
  26          global $TEXT;
  27          global $INPUT;
  28          global $ID;
  29          global $ACT;
  30  
  31          $opts = ['id' => $ID, 'preact' => $ACT];
  32          //get section name when coming from section edit
  33          if ($INPUT->has('hid')) {
  34              // Use explicitly transmitted header id
  35              $opts['fragment'] = $INPUT->str('hid');
  36          } elseif ($PRE && preg_match('/^\s*==+([^=\n]+)/', $TEXT, $match)) {
  37              // Fallback to old mechanism
  38              $check = false; //Byref
  39              $opts['fragment'] = sectionID($match[0], $check);
  40          }
  41  
  42          // execute the redirect
  43          Event::createAndTrigger('ACTION_SHOW_REDIRECT', $opts, [$this, 'redirect']);
  44  
  45          // should never be reached
  46          throw new ActionAbort('show');
  47      }
  48  
  49      /**
  50       * Execute the redirect
  51       *
  52       * Default action for ACTION_SHOW_REDIRECT
  53       *
  54       * @param array $opts id and fragment for the redirect and the preact
  55       */
  56      public function redirect($opts)
  57      {
  58          $go = wl($opts['id'], '', true, '&');
  59          if (isset($opts['fragment'])) $go .= '#' . $opts['fragment'];
  60  
  61          //show it
  62          send_redirect($go);
  63      }
  64  }