<?php
// vim:filetype=php expandtab tabstop=2 softtabstop=2 shiftwidth=2 autoindent smartindent
// $Id: nick.inc,v 1.12 2008/11/06 10:46:59 seeschloss Exp $

function tribune_regex_info() {
  return t('Allows users to correct their own posts using regular expressions.');
}

function tribune_regex_filter(&$post, &$help) {
  global $user;

  if (tribune_variable_get('tribune_regex_allow_anonymous', true) or $user->uid) {
    if (preg_match('!^((([01]?[0-9])|(2[0-3])):([0-5][0-9])(:([0-5][0-9]))?([:\^][0-9]|¹|²|³)?) s(.)(.*[^\\\])\9(.*[^\\\])\9([ig]?)$!', $post['message'], $matches)) {
      $clock = $matches[1];

      $posts = tribune_get_posts_from_clock($clock);
      if (count($posts)) {
        $separator = $matches[9];
        $from      = str_replace('\\'.$separator, $separator, $matches[10]);
        $to        = str_replace('\\'.$separator, $separator, $matches[11]);
        $options   = $matches[12];
        $limit     = 1;

        if (strpos($options, 'g') !== false) {
          $limit = -1;
          $options = str_replace('g', '', $options);
        }

        $from = str_replace('/', '\\/', $from);

        $expression = 's/'.$from.'/'.$to.'/'.$options;

        foreach ($posts as $id) {
          $ref_post = tribune_get_post($id);

          if ($ref_post and (tribune_variable_get('tribune_regex_allow_all_posts', false) or $ref_post['uid'] == $user->uid)) {
            $new_message = preg_replace('/'.$from.'/'.$options, $to, $ref_post['message'], $limit, $count);

            if ($count and $new_message) {
              $ref_post['message'] = $new_message;

              if (tribune_variable_get('tribune_regex_in_place', false)) {
                $ref_post['parsed']  = print_message(tribune_slip($new_message));
                tribune_update_post($ref_post);

                if (!tribune_variable_get('tribune_regex_show_posts', true)) {
                  $post = null;
                }
              } else {
                if (tribune_variable_get('tribune_regex_show_posts', true)) {
                  $post['message'] .= ': '.$ref_post['message'];
                } else {
                  $post['message'] = $ref_post['message'];
                }
              }
            }
          }
        }
      }
    }
  }
}

function tribune_regex_settings () {
    $form = array();

    $form['tribune_regex_show_posts'] = array(
        '#type' => "checkbox",
        '#title' => t("Show modification posts"),
        '#default_value' => tribune_variable_get('tribune_regex_show_posts', true),
        '#description' => t("If this is unchecked, posts which modify another post will not be shown (this means that there will be no way whatsoever to know which posts have been modified)"),
    );

    $form['tribune_regex_allow_all_posts'] = array(
        '#type' => "checkbox",
        '#title' => t("Allow everybody to modify all posts"),
        '#default_value' => tribune_variable_get('tribune_regex_allow_all_posts', false),
        '#description' => t("If this is checked, everybody (including anonymous users) will be able to modify any post. Otherwise, only registered users can change their own posts."),
    );

    $form['tribune_regex_allow_anonymous'] = array(
        '#type' => "checkbox",
        '#title' => t("Allow corrections by anonymous users"),
        '#default_value' => tribune_variable_get('tribune_regex_allow_anonymous', true),
    );

    $form['tribune_regex_in_place'] = array(
        '#type' => "checkbox",
        '#title' => t("Modify posts in place"),
        '#default_value' => tribune_variable_get('tribune_regex_in_place', false),
        '#description' => t("If this is unchecked, instead of modifying posts « in place » the correction will be shown in a new post."),
    );

    return tribune_settings_form($form);
}