<?php
// $Id: pathauto.module,v 1.100 2008-04-28 19:47:10 greggles Exp $


/**
 * Implementation of hook_help
 */  
function pathauto_help($path, $arg) {
  switch ($path) {
    case 'admin/help#pathauto':
      $output = t("<p>Provides a mechanism for modules to automatically generate aliases for the content they manage.</p>
                  <h2>Settings</h2>
                  <p>The <strong>Maximum Alias Length</strong> and <strong>Maximum component length</strong> values
                  default to 100 and have a limit of 128 from pathauto.  This length is limited by the length of the dst 
                  column of the url_alias database table. The default database schema for this column is 128. If you 
                  set a length that is equal to that of the one set in the dst column it will cause problems in situations 
                  where the system needs to append additional words to the aliased URL. For example... URLs generated
                  for feeds will have '/feed' added to the end. You should enter a value that is the length of the dst
                  column minus the length of any strings that might get added to the end of the URL. The length of 
                  strings that might get added to the end of your URLs depends on which modules you have enabled and 
                  on your Pathauto settings. The recommended and default value is 100.</p>
                  <p><strong>Raw Tokens</strong> In Pathauto it is appropriate to use the -raw form of tokens.  Paths are sent through a filtering
                  system which ensures that raw user content is filtered.  Failure to use -raw tokens can cause problems
                  with the Pathauto punctuation filtering system.</p>");
      return $output;
  }
}

/**
 * Implementation of hook_perm
 */
function pathauto_perm() {
  return array('administer pathauto', 'notify of path changes');
}

/*
 * Implementation of hook_menu
 */
function pathauto_menu() {
  $items['admin/build/path/pathauto'] = array(
    'title' => t('Automated alias settings'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('pathauto_admin_settings'),
    'access callback' => 'user_access',
    'access arguments' => array('administer pathauto'),
    'type' => MENU_LOCAL_TASK,
    'weight' => 10,
  );
  
  $items['admin/build/path/delete_bulk'] = array(
    'title' => t('Delete aliases'),
    'page callback' => 'drupal_get_form', 
    'page arguments' => array('pathauto_admin_delete'),
    'access arguments' => array('administer url aliases'), 
    'type' => MENU_LOCAL_TASK,
  );

  return $items;
}


/**
 * Include all pathauto include files.
 */
function _pathauto_include() {
  $pathauto_path = drupal_get_path('module', 'pathauto');
  require_once("$pathauto_path/pathauto.inc");
  require_once("$pathauto_path/pathauto_node.inc");
  require_once("$pathauto_path/pathauto_taxonomy.inc");
  require_once("$pathauto_path/pathauto_user.inc");
}


/**
 * Callback for admin settings page.
 */
function pathauto_admin_settings() {
  _pathauto_include();

  // Make sure they have token
  if (!function_exists('token_get_list')) {
    drupal_set_message(t('It appears that the <a href="@token_link">Token module</a> is not installed.  Please ensure that you have it installed so that Pathauto can work properly.  You may need to disable Pathauto and re-enable it to get Token enabled.', array('@token_link' => 'http://drupal.org/project/token')), 'error');
    return;
  }

  // Default words to ignore
  $ignore_words = array(
    "a", "an", "as", "at", "before", "but", "by", "for", "from", "is", "in",
    "into", "like", "of", "off", "on", "onto", "per", "since", "than", "the", 
    "this", "that", "to", "up", "via", "with"
  );

  // Generate the form - settings applying to all patterns first
  $group_weight = -20;
  $form["general"] = array('#type' => 'fieldset', '#weight' => $group_weight,
    '#title' => t('General settings'), '#collapsible' => TRUE,
    '#collapsed' => TRUE);
  $group_weight++;

  $form["general"]["pathauto_verbose"] = array('#type' => 'checkbox',
    '#title' => t('Verbose'),
    '#default_value' => variable_get('pathauto_verbose', FALSE),
    '#description' => t('Display alias changes (except during bulk updates).'));

  $form["general"]["pathauto_separator"] = array('#type' => 'textfield',
    '#title' => t('Separator'), '#size' => 1, '#maxlength' => 1,
    '#default_value' => variable_get('pathauto_separator', '-'),
    '#description' => t('Character used to separate words in titles. This will replace any spaces and punctuation characters. Using a space or + character can cause unexpected results.'));

  $form["general"]["pathauto_case"] = array('#type' => 'radios',
    '#title' => t('Character case'),
    '#default_value' => variable_get('pathauto_case', 1),
    '#options' => array(t('Leave case the same as source token values.'), t('Change to lower case')),
    );
    
  $form["general"]["pathauto_max_length"] = array('#type' => 'textfield',
    '#title' => t('Maximum alias length'), '#size' => 3, '#maxlength' => 3,
    '#default_value' => variable_get('pathauto_max_length', 100),
    '#description' => t('Maximum length of aliases to generate. 100 is recommended.  See <a href="@pathauto-help">Pathauto help</a> for details.', array('@pathauto-help' => url('admin/help/pathauto'))));

  $form["general"]["pathauto_max_component_length"] = array('#type' => 'textfield',
    '#title' => t('Maximum component length'), '#size' => 3, '#maxlength' => 3,
    '#default_value' => variable_get('pathauto_max_component_length', 100),
    '#description' => t('Maximum text length of any component in the alias (e.g., [title]). 100 is recommended. See <a href="@pathauto-help">Pathauto help</a> for details.', array('@pathauto-help' => url('admin/help/pathauto'))));

  $form["general"]["pathauto_max_bulk_update"] = array('#type' => 'textfield',
    '#title' => t('Maximum number of objects to alias in a bulk update'), '#size' => 4, '#maxlength' => 4,
    '#default_value' => variable_get('pathauto_max_bulk_update', 50),
    '#description' => t('Maximum number of objects of a given type which should be aliased during a a bulk update. The default is 50 and the recommended number depends on the speed of your server.  If bulk updates "time out" or result in a "white screen" then reduce the number.'));

  $actions = array(
    t('Do nothing. Leave the old alias intact.'),
    t('Create a new alias. Leave the existing alias functioning.'),
    t('Create a new alias. Delete the old alias.'));

  if (function_exists('path_redirect_save')) {
    $actions[] = t('Create a new alias. Redirect from old alias.');
  }
  elseif (variable_get('pathauto_update_action', 2) == 3) {
    // the redirect action is selected, but path_redirect is not enabled
    // let's set the variable back to the default
    variable_set('pathauto_update_action', 2);
  }

  $form["general"]["pathauto_update_action"] = array('#type' => 'radios',
    '#title' => t('Update action'), '#default_value' => variable_get('pathauto_update_action', 2),
    '#options' => $actions,
    '#description' => t('What should pathauto do when updating an existing content item which already has an alias?'));

  $disable_transliteration = TRUE;
  $disable_text = "";
  $path = drupal_get_path('module', 'pathauto');
  $transliteration_help = t("When a pattern includes certain characters (such as those with accents) should Pathauto attempt to transliterate them into the ASCII-96 alphabet?  Transliteration is determined by the i18n-ascii.txt file in the Pathauto directory. <strong>This option is disabled on your site because you do not have an i18n-ascii.txt file in the Pathauto directory.</strong>");
  if (is_file($path .'/i18n-ascii.txt')) {
    $disable_transliteration = FALSE;
    $transliteration_help = t("When a pattern includes certain characters (such as those with accents) should Pathauto attempt to transliterate them into the ASCII-96 alphabet?  Transliteration is determined by the i18n-ascii.txt file in the Pathauto directory.");
  }
  else {
    // Perhaps they've removed the file, set the transliterate option to FALSE
    variable_set('pathauto_transliterate', FALSE);
  }
  $form["general"]["pathauto_transliterate"] = array('#type' => 'checkbox',
    '#title' => t('Transliterate prior to creating alias'),
    '#default_value' => variable_get('pathauto_transliterate', FALSE),
    '#description' => $transliteration_help,
    '#disabled' => $disable_transliteration,
  );
  $form["general"]["pathauto_reduce_ascii"] = array('#type' => 'checkbox',
    '#title' => t('Reduce strings to letters and numbers from ASCII-96'),
    '#default_value' => variable_get('pathauto_reduce_ascii', FALSE),
    '#description' => t("Filters the new alias to only letters and numbers found in the ASCII-96 set."),
  );


  $form["general"]["pathauto_ignore_words"] = array('#type' => 'textarea',
    '#title' => t('Strings to Remove'), '#default_value' => variable_get('pathauto_ignore_words', implode(",", $ignore_words)),
    '#description' => t('Words to strip out of the URL alias, separated by commas.  Do not place punctuation in here and do not use WYSIWYG editors on this field.')
  );


  $form["punctuation"] = array('#type' => 'fieldset', '#weight' => $group_weight,
    '#title' => t('Punctuation settings'), '#collapsible' => TRUE,
    '#collapsed' => TRUE);
  $group_weight++;

  $punctuation = pathauto_punctuation_chars();
  foreach ($punctuation as $name => $details) {
    $form["punctuation"]["pathauto_punctuation_". $name ] = array('#type' => 'select',
      '#title' => $details['name'],
      '#default_value' => variable_get("pathauto_punctuation_". $name, 0),
      '#options' => array('0' => t('Remove'), '1' => t('Replace by separator'), '2' => t('No action (do not replace)')),
    );
  }

  // Call the hook on all modules - an array of 'settings' objects is returned
  $all_settings = module_invoke_all('pathauto', 'settings');
  $modulelist = '';
  $indexcount = 0;
  foreach ($all_settings as $settings) {
    $items = '';
    $module = $settings->module;
    $modulelist[] = $module;
    $patterndescr = $settings->patterndescr;
    $patterndefault = $settings->patterndefault;
    $groupheader = $settings->groupheader;
    $supportsfeeds = isset($settings->supportsfeeds) ? $settings->supportsfeeds : NULL;
    variable_set('pathauto_'. $module .'_supportsfeeds', $supportsfeeds);

    $form[$module] = array('#type' => 'fieldset',
      '#title' => $groupheader, '#weight' => $group_weight,
      '#collapsible' => TRUE, '#collapsed' => TRUE);
    $group_weight++;

    // Prompt for the default pattern for this module
    $variable = 'pathauto_'. $module .'_pattern';
    $description = '';
    if (!count($_POST)) {
      $error = _pathauto_check_pattern(variable_get($variable, $patterndefault), $settings->token_type);
      if ($error) {
        $form[$module]['#collapsed'] = FALSE;
        $description = $error;
      }
    }
    $form[$module][$variable] = array('#type' => 'textfield',
      '#title' => $patterndescr,
      '#default_value' => variable_get($variable, $patterndefault),
      '#description' => $description,
      '#size' => 65,
      '#maxlength' => 1280);

    // If the module supports a set of specialized patterns, set
    // them up here
    if (isset($settings->patternitems)) {
      foreach ($settings->patternitems as $itemname => $itemlabel) {
        $variable = 'pathauto_'. $module .'_'. $itemname .'_pattern';
        if (!count($_POST)) {
          $error = _pathauto_check_pattern(variable_get($variable, $patterndefault), $settings->token_type);
          if ($error) {
            $form[$module]['#collapsed'] = FALSE;
            $description = $error;
          }
        }

        $form[$module][$variable] = array('#type' => 'textfield',
          '#title' => $itemlabel,
          '#default_value' => variable_get($variable, ''),
          '#description' => $description,
          '#size' => 65,
          '#maxlength' => 1280);
      }
    }

    // Display the user documentation of placeholders supported by
    // this module, as a description on the last pattern
    $doc = "<dl>\n";
    foreach ($settings->placeholders as $name => $description) {
      $doc .= '<dt>'. $name .'</dt>';
      $doc .= '<dd>'. $description .'</dd>';
    }
    $doc .= "</dl>\n";
    $form[$module]['token_help'] = array(
      '#title' => t('Replacement patterns'),
      '#type' => 'fieldset',
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#description' => t('Use -raw replacements for text to avoid problems with HTML entities.'),
    );
    $form[$module]['token_help']['help'] = array(
      '#value' => $doc,
    );


    // If the module supports bulk updates, offer the update action here
    if ($settings->bulkname) {
      $variable = 'pathauto_'. $module .'_bulkupdate';
      if (variable_get($variable, FALSE)) {
        variable_set($variable, FALSE);
        $function = $module .'_pathauto_bulkupdate';
        call_user_func($function);
      }
      $form[$module][$variable] = array('#type' => 'checkbox',
        '#title' => $settings->bulkname,
        '#default_value' => FALSE,
        '#description' => $settings->bulkdescr);
    }

    // If the module supports feeds, offer to generate aliases for them
    if ($supportsfeeds) {
      $variable = 'pathauto_'. $module .'_applytofeeds';
      $current = variable_get($variable, $supportsfeeds);
      // This checks for the old style from 2.0 and earlier. TODO: At some point we can drop that.
      if (is_numeric($current)) {
        $current = $supportsfeeds;
      }

      $form[$module][$variable] = array('#type' => 'textfield',
        '#title' => t('Internal feed alias text (leave blank to disable)'),
        '#size' => 65,
        '#maxlength' => 1280,
        '#default_value' => $current,
        '#description' => t('The text to use for aliases for RSS feeds. Examples are "feed" and "0/feed".'));
    }

  }

  if (isset($do_index_bulkupdate) && $do_index_bulkupdate) {
    drupal_set_message(format_plural($indexcount,
      "Bulk generation of index aliases completed, one alias generated.",
      "Bulk generation of index aliases completed, @count aliases generated."));
  }

  // Keep track of which modules currently support pathauto
  variable_set('pathauto_modulelist', $modulelist);

  return system_settings_form($form);
}

/**
 *  Helper function to see if they are using all -raw tokens available
 *  Returns a status flag if there is an error or not
 */
function _pathauto_check_pattern($pattern, $type) {
  // Hold items we've warned about so we only warn once per token
  static $warned;
  $return = FALSE;

  // Build up a set of all tokens in a format that's easy to search
  $all_tokens = array();
  $tokens = token_get_list($type);
  foreach ($tokens as $actual_tokens) {
    foreach (array_keys($actual_tokens) as $token) {
      $all_tokens[$token] = $token;
    }
  }

  // Now, search the pattern and evaluate its contents.
  $matches = array();
  if (preg_match_all('/\[[a-zA-z_\-]+?\]/i', $pattern, $matches)) {
    // Loop over each found token.
    foreach ($matches[0] as $id => $token) {
      $token = str_replace('[', '', str_replace(']', '', $token));
      // Check if the token is even valid in this context.
      if (!array_key_exists($token, $all_tokens)) {
        drupal_set_message(t('You are using the token [%token] which is not valid within the scope of tokens where you are using it.', array('%token' => $token)), 'error');
        $return[] = $token;
      }
      // Check if there is a raw companion that they should be using.
      elseif (!preg_match('/\-raw/i', $token)) {
        $raw_token = $token .'-raw';
        if (array_key_exists($raw_token, $all_tokens)) {
          if (!isset($warned) || !array_key_exists($token, $warned)) {
            drupal_set_message(t('You are using the token [%token] which has a -raw companion available [%raw_token].  For Pathauto patterns you should use the -raw version of tokens unless you really know what you are doing.  See the <a href="@pathauto-help">Pathauto help</a> for more details.', array('%token' => $token, '%raw_token' => $raw_token, '@pathauto-help' => url('admin/help/pathauto'))), 'error');
            $warned[$token] = $token;
          }
          $return[] = $token;
        }
      }
    }
  }

  if ($return) {
    $description = t('NOTE: This field contains potentially incorrect patterns. ');
    $description .= format_plural(count($return), "Problem token: ", "Problem tokens: ");
    $description .= t('%problems', array('%problems' => implode(', ', $return)));
    $return = $description;
  }

  return $return;
}

function pathauto_admin_settings_validate($form, &$form_state) {
  // Validate that the separator is not set to be removed per http://drupal.org/node/184119
  // This isn't really all that bad so warn, but still allow them to save the value.
  $separator = $form_state['values']['pathauto_separator'];
  $punctuation = pathauto_punctuation_chars();
  foreach ($punctuation as $name => $details) {
    if ($details['value'] == $separator) {
      $action = $form_state['values']['pathauto_punctuation_'. $name];
      if ($action == 0) {
        drupal_set_message(t('You have configured the @name to be the separator and to be removed when encountered in strings.  This can cause problems with your patterns and especially with the catpath and termpath patterns. You should probably set the action for @name to be "replace by separator"', array('@name' => $details['name'])), 'error');
      }
    }
  }
}

/**
 * Implementation of hook_token_values() for Pathauto specific tokens
 */
function pathauto_token_values($type, $object = NULL) {
  if (module_exists('taxonomy')) {
    if ($type == 'taxonomy' || $type == 'node' || $type == 'all') {
      _pathauto_include();
      switch ($type) {
        case 'node':
          $vid = db_result(db_query_range("SELECT t.vid FROM {term_node} r INNER JOIN {term_data} t ON r.tid = t.tid INNER JOIN {vocabulary} v ON t.vid = v.vid WHERE r.nid = %d ORDER BY v.weight, t.weight, t.name", $object->nid, 0, 1));
          $category = db_fetch_object(db_query_range("SELECT t.tid, t.name FROM {term_data} t INNER JOIN {term_node} r ON r.tid = t.tid WHERE t.vid = %d AND r.nid = %d ORDER BY weight", $vid, $object->nid, 0, 1));
          $category->vid = $vid;
          // In the realm of nodes these are terms, in the realm of Taxonomy, cats
          $label = 'term';

          // We're on a node and it's a book and it has a parent?  Get the book path alias
          if (module_exists('book')) {
            if ($object->type == 'book' && $object->parent) {
              $values['bookpathalias'] = drupal_get_path_alias('node/'. $object->parent);
            }
            else {
              $values['bookpathalias'] = '';
            }
          }
          
        case 'taxonomy':
        default:
          if (!isset($category)) {
            $category = $object;
          }
          if (!isset($label)) {
            $label = 'cat';
          }
          if (isset($category->tid)) {
            $separator = variable_get('pathauto_separator', '-');
            $parents = taxonomy_get_parents_all($category->tid);
            array_shift($parents);
            $catpath = '';
            $catpath_raw = '';
            foreach ($parents as $parent) {
              // Replace any / characters in individual terms which might create confusing URLs
              $catpath = pathauto_cleanstring(check_plain(preg_replace('/\//', '', $parent->name))) .'/'. $catpath;
              $catpath_raw = pathauto_cleanstring(preg_replace('/\//', '', $parent->name)) .'/'. $catpath_raw;
            }
            $values[$label .'path'] = $catpath .'/'. check_plain($category->name);
            $values[$label .'path-raw'] = $catpath_raw .'/'. $category->name;
            
            $values[$label .'alias'] = drupal_get_path_alias('taxonomy/term/'. $category->tid);
            if (!strncasecmp($values[$label .'alias'], 'taxonomy', 8)) {
              $values[$label .'alias'] = check_plain($category->name);
            }
          }
          else { // Provide some defaults if they aren't set.
            $values[$label .'path'] = '';
            $values[$label .'path-raw'] = '';
            $values[$label .'alias'] = '';
          }
      }
      return $values;
    }
  }
}

/**
 * Implementation of hook_token_list() for Pathauto specific tokens
 */
function pathauto_token_list($type = 'all') {
  $tokens = array();
  if (module_exists('taxonomy')) {
    if ($type == 'taxonomy' || $type == 'all') {
      $tokens['taxonomy']['catpath'] = t("As [cat], but including its supercategories separated by /.");
      $tokens['taxonomy']['catpath-raw'] = t("As [cat-raw], but including its supercategories separated by /. WARNING - raw user input.");
      $tokens['taxonomy']['catalias'] = t("URL alias for the term.");
    }
    if ($type == 'node' || $type == 'all') {
      $tokens['node']['termpath'] = t("As [term], but including its supercategories separated by /.");
      $tokens['node']['termpath-raw'] = t("As [term-raw], but including its supercategories separated by /. WARNING - raw user input.");
      $tokens['node']['termalias'] = t("URL alias for the term.");
    }
  }
  if (module_exists('book')) {
    if ($type == 'node' || $type == 'all') {
      $tokens['node']['bookpathalias'] = t("URL alias for the parent book.");
    }    
  }
  return $tokens;
}

/**
 * Menu callback: select certain alias types to delete
 */
function pathauto_admin_delete() {
  /* TODO:
   1) all - DONE
   2) all node aliases - DONE
   4) all user aliases - DONE
   5) all taxonomy aliases - DONE
   6) by node type
   7) by taxonomy vocabulary
   8) no longer existing aliases (see http://drupal.org/node/128366 )
   9) where src like 'pattern' - DON'T DO
   10) where dst like 'pattern' - DON'T DO
  */

  $form = array();
  $form["delete"] = array('#type' => 'fieldset',
    '#title' => t('Choose Aliases to Delete'), '#collapsible' => FALSE,
    '#collapsed' => FALSE);

  // First we do the "all" case
  $total_count = db_result(db_query("SELECT count(1) FROM {url_alias}"));
  $form['delete']['all_aliases'] = array('#type' => 'checkbox',
    '#title' => t('all aliases'),
    '#default_value' => FALSE,
    '#description' => t('Delete all aliases.  Number of aliases which will be deleted: %count.', array('%count' => $total_count)));

  // Next, iterate over an array of objects/alias types which can be deleted and provide checkboxes
  $objects = module_invoke_all('path_alias_types');
  foreach ($objects as $internal_name => $label) {
    $count = db_result(db_query("SELECT count(1) FROM {url_alias} WHERE src LIKE '%s%%'", $internal_name));
    $form['delete'][$internal_name] = array('#type' => 'checkbox',
      '#title' => $label, // This label is sent through t() in the hard coded function where it is defined
      '#default_value' => FALSE,
      '#description' => t('Delete aliases for all @label. Number of aliases which will be deleted: %count.', array('@label' => $label, '%count' => $count)));
  }

  // Warn them and give a button that shows we mean business
  $form["warning"] = array('#value' => t('<p><strong>Note:</strong> there is no confirmation.  Be sure of your action before clicking the "Delete aliases now!" button.<br />  You may want to make a backup of the database and/or the url_alias table prior to using this feature.</p>'));
  $form['buttons']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Delete aliases now!'),
  );

  return $form;
}

/**
 *  Submit handler for the bulk delete form
 */
function pathauto_admin_delete_submit($form, &$form_state) {
  foreach ($form_state['values'] as $key => $value) {
    if ($value) {
      if ($key === 'all_aliases') {
        db_query('DELETE FROM {url_alias}');
        drupal_set_message(t('All of your path aliases have been deleted.'));
      }
      $objects = module_invoke_all('path_alias_types');
      if (array_key_exists($key, $objects)) {
        db_query("DELETE FROM {url_alias} WHERE src LIKE '%s%%'", $key);
        drupal_set_message(t('All of your %type path aliases have been deleted.', array('%type' => $objects[$key])));
      }
    }
  }
  return 'admin/build/path/delete_bulk';
}

function pathauto_path_alias_types() {
  $objects = array('user/' => t('users'), 'node/' => t('content'));
  if (module_exists('blog')) {
    $objects['blog/'] = t('user blogs');
  }
  if (module_exists('taxonomy')) {
    $objects['taxonomy/'] = t('vocabularies and terms');
  }
  if (module_exists('taxonomy')) {
    $objects['user/%/track'] = t('user trackers');
  }
  if (module_exists('forum')) {
    $objects['forum/%'] = t('forums');
  }

  return $objects;
}

//==============================================================================
// Some node related functions.

/**
 * Implementation of hook_nodeapi().
 */
function pathauto_nodeapi(&$node, $op, $teaser, $page) {
  _pathauto_include();
  if (module_exists('path')) {
    switch ($op) {
      case 'presave':
        // About to be saved (before insert/update)
        if (isset($node->pathauto_perform_alias) && isset($node->old_alias)
            && $node->pathauto_perform_alias && $node->path == '' && $node->old_alias != '') {
          /**
           * There was an old alias, but when pathauto_perform_alias was checked
           * the javascript disabled the textbox which led to an empty value being 
           * submitted. Restoring the old path-value here prevents the Path module
           * from deleting any old alias before Pathauto gets control.
           */
          $node->path = $node->old_alias;
        }
        break;
      case 'insert':
      case 'update':
        // Get the specific pattern or the default
        if (!empty($node->language)) {
          $pattern = variable_get('pathauto_node_'. $node->type .'_'. $node->language .'_pattern', FALSE);
        }
        else {
          $pattern = variable_get('pathauto_node_'. $node->type .'_pattern', FALSE);
        }
        if (!trim($pattern)) {
          $pattern = variable_get('pathauto_node_pattern', FALSE);
        }
        // Only do work if there's a pattern
        if ($pattern) {
          // Only create an alias if the checkbox was not provided or if the checkbox was provided and is checked
          if (!isset($node->pathauto_perform_alias) || $node->pathauto_perform_alias) {
            $placeholders = pathauto_get_placeholders('node', $node);
            $src = "node/$node->nid";
            $alias = pathauto_create_alias('node', $op, $placeholders, $src, $node->nid, $node->type, $node->language);
          }
        }
        break;
      case 'delete':
        path_set_alias('node/'. $node->nid);
        path_set_alias('node/'. $node->nid .'/feed');
        break;
      default:
        break;
    }
  }
}

/**
 * Implementation of hook_form_alter().
 * 
 * This allows alias creators to override Pathauto and specify their
 * own aliases (Pathauto will be invisible to other users). Inserted
 * into the path module's fieldset in the node form.
 */
function pathauto_form_alter(&$form, $form_state, $form_id) {
  // Only do this for node forms
  if (isset($form['#id']) && ($form['#id'] == 'node-form') && arg(0) == 'node') {
    // See if there is a pathauto pattern or default applicable
    if (isset($form['language'])) {
      $language = isset($form['language']['#value']) ? $form['language']['#value'] : $form['language']['#default_value'];
      $pattern = variable_get('pathauto_node_'. $form['type']['#value'] .'_'. $language .'_pattern', FALSE);
    }
    else {
      $pattern = variable_get('pathauto_node_'. $form['type']['#value'] .'_pattern', FALSE);	
    }
    if (!trim($pattern)) {
      $pattern = variable_get('pathauto_node_pattern', FALSE);
    }

    // If there is a pattern AND the user is allowed to create aliases AND the path textbox is present on this form
    if ($pattern && user_access('create url aliases') && isset($form['path']['path'])) {
      $output = t('An alias will be generated for you. If you wish to create your own alias below, untick this option.');
      if (user_access('administer pathauto')) {
        $output .= t(' To control the format of the generated aliases, see the <a href="@pathauto">Pathauto settings</a>.', array('@pathauto' => url('admin/settings/pathauto')));
      }

      drupal_add_js(drupal_get_path('module', 'pathauto') .'/pathauto.js');
      $form['path']['#collapsed'] = FALSE;

      $form['path']['pathauto_perform_alias'] = array('#type' => 'checkbox',
        '#title' => t('Automatic alias'),
        '#default_value' => TRUE,
        '#description' => $output,
        '#weight' => 0
      );

      //For Pathauto to remember the old alias and prevent the Path-module from deleteing it when Pathauto wants to preserve it
      $old_alias = $form['path']['path']['#default_value'];
      $form['path']['old_alias'] = array('#type' => 'value', '#value' => $old_alias);
    }
  }
}

/**
 * Implementation of hook_node_operations().
 */
function pathauto_node_operations() {
  $operations = array(
    'update_alias' => array(
      'label' => t('Update path alias'),
      'callback' => 'pathauto_node_operations_update',
    ),
  );
  return $operations;
}

/**
 * Callback function for updating node aliases.
 */
function pathauto_node_operations_update($nodes) {
  foreach ($nodes as $nid) {
    $node = node_load($nid);
    $placeholders = pathauto_get_placeholders('node', $node);
    pathauto_create_alias('node', 'bulkupdate', $placeholders, "node/$node->nid", $node->nid, $node->type);
  }
}

//==============================================================================
// Taxonomy related functions.
/**
 * Implementation of hook_taxonomy().
 */
function pathauto_taxonomy($op, $type, $object = NULL) {
  _pathauto_include();
  switch ($type) {
    case 'term':
      switch ($op) {
        case 'insert':
        case 'update':
          /*
          ** Use the category info to automatically create an alias
          */
          $category = (object) $object;
          if ($category->name) {
            $count = _taxonomy_pathauto_alias($category, $op);
          }

          //For all children generate new alias (important if [catpath] used)
          foreach (taxonomy_get_tree($category->vid, $category->tid) as $subcategory) {
            $count = _taxonomy_pathauto_alias($subcategory, $op);
          }

          break;
        case 'delete':
          //If the category is deleted, remove the path aliases
          $category = (object) $object;
          path_set_alias('taxonomy/term/'. $category->tid);
          path_set_alias(taxonomy_term_path($category));
          path_set_alias('forum/'. $category->tid);
          path_set_alias('taxonomy/term/'. $category->tid .'/0/feed');
          break;
        default:
          break;
      }
      break;
    default:
      break;
  }
}


//==============================================================================
// User related functions.

/**
 * Implementation of hook_user() for users, trackers, and blogs
 */
function pathauto_user($op, &$edit, &$user, $category = FALSE) {
  _pathauto_include();
  switch ($op) {
    case 'insert':
    case 'update':
      /*
      ** Use the username to automatically create an alias
      */
      $pathauto_user = (object) array_merge((array) $user, $edit);
      if ($user->name) {
        $placeholders = pathauto_get_placeholders('user', $pathauto_user);
        $src = 'user/'. $user->uid;
        $alias = pathauto_create_alias('user', $op, $placeholders, $src, $user->uid);

        if (module_exists('blog')) {
          $new_user = $user;
          $new_user->roles = isset($edit['roles']) ? $edit['roles']: array();
          $new_user->roles[DRUPAL_AUTHENTICATED_RID] = 'authenticated user'; // Add this back
          if (user_access('create blog entries', $new_user)) {
            $src = 'blog/'. $user->uid;
            $alias = pathauto_create_alias('blog', $op, $placeholders, $src, $user->uid);
          }
          else {
            path_set_alias('blog/'. $user->uid);
            path_set_alias('blog/'. $user->uid .'/feed');
          }
        }
        if (module_exists('tracker')) {
          $src = 'user/'. $user->uid .'/track';
          $alias = pathauto_create_alias('tracker', $op, $placeholders, $src, $user->uid);
        }
      }
      break;
    case 'delete':
      /*
      ** If the user is deleted, remove the path aliases
      **
      */
      $user = (object) $user;
      path_set_alias('user/'. $user->uid);

      //  They may have enabled these modules and/or feeds when the user was created, so let's try to delete all of them
      path_set_alias('blog/'. $user->uid);
      path_set_alias('blog/'. $user->uid .'/feed');
      path_set_alias('user/'. $user->uid .'/track');
      path_set_alias('user/'. $user->uid .'/track/feed');

      break;
    default:
      break;
  }
}