<?php
// $Id: pathauto.module,v 1.44.4.30 2007-09-17 20:31:44 greggles Exp $


/**
 * Implementation of hook_help
 */  
function pathauto_help($section) {
  $output = '';
  switch ($section) {
    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>");
      break;
  }

  return $output;
}

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

/*
 * Implementation of hook_menu
 */
function pathauto_menu($may_cache) {
  
  $items = array();
  if ($may_cache) {
    $items[] = array(
      'path' => 'admin/settings/pathauto',
      'title' => t('Pathauto'),
      'description' => t('Configure how pathauto generates clean URLs for your content.'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('pathauto_admin_settings'),
      'access' => user_access('administer pathauto'),
      'type' => MENU_NORMAL_ITEM,
    );
    $items[] = array(
      'path' => 'admin/build/path/delete_bulk', 
      'title' => t('Delete aliases'),
      'callback' => 'drupal_get_form', 
      'callback arguments' => array('pathauto_admin_delete'),
      'access' => user_access('administer url aliases'), 
      'type' => MENU_LOCAL_TASK,
    );
  }

  return $items;
}


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


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

  // Restrict administration of this module
  if (!user_access('administer pathauto')) {
    $form["error"] = array('#type' => 'item',
      '#title' => t('You are not authorized to access the pathauto settings.'));
    return system_settings_form($form);
  }

  // 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.'));

  $form["general"]["pathauto_quotes"] = array('#type' => 'radios',
    '#title' => t('Quotation marks'),
    '#default_value' => variable_get('pathauto_quotes', 0),
    '#options' => array(t('Remove'), t('Replace by separator')),
    );

  $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' => 3, '#maxlength' => 3,
    '#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.'));

  $form["general"]["pathauto_update_action"] = array('#type' => 'radios',
    '#title' => t('Update action'), '#default_value' => variable_get('pathauto_update_action', 2),
    '#options' => array(t('Do nothing, leaving the old alias intact'),
          t('Create a new alias in addition to the old alias'),
          t('Create a new alias, replacing the old one')),
    '#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');
  $transliteration_help = "When a pattern includes certain characters (such as those with accents) should Pathauto attempt to transliterate them into the ASCII-96 alphabet?  Transliteration is determined by the i18n-ascii.txt file in the Pathauto directory. <strong>This option is disabled on your site because you do not have an i18n-ascii.txt file in the Pathauto directory.</strong>";
  if (is_file($path .'/i18n-ascii.txt')) {
    $disable_transliteration = FALSE;
    $transliteration_help = "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.";
  }
  
  $form["general"]["pathauto_transliterate"] = array('#type' => 'checkbox',
    '#title' => t('Transliterate prior to creating alias'),
    '#default_value' => variable_get('pathauto_transliterate', FALSE),
    '#description' => t($transliteration_help),
    '#disabled' => $disable_transliteration,
  );

  $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')
  );

  // 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';
    $form[$module][$variable] = array('#type' => 'textfield',
      '#title' => $patterndescr,
      '#default_value' => variable_get($variable, $patterndefault),
      '#size' => 65, '#maxlength' => 128);

    // 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';
        $form[$module][$variable] = array('#type' => 'textfield',
          '#title' => $itemlabel,
          '#default_value' => variable_get($variable, ''),
          '#size' => 65, '#maxlength' => 128);
      }
    }

    // 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][$variable]["#description"] = $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);
    }

    // Perform bulk updates of indexes for this module, if asked
    if ($do_index_bulkupdate) {
      $function = $module .'_pathauto_bulkupdate_indexes';
      if (is_callable($function)) {
        $indexcount += call_user_func($function);
      }
    }

    // If the module supports feeds, offer to generate aliases for them
    if ($supportsfeeds) {
      $variable = 'pathauto_'. $module .'_applytofeeds';
      $form[$module][$variable] = array('#type' => 'checkbox',
        '#title' => t('Create feed aliases'),
        '#default_value' => variable_get($variable, FALSE),
        '#description' => t('Also generate aliases for RSS feeds.'));
    }

  }

  if ($do_index_bulkupdate) {
    drupal_set_message(format_plural($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);
}

/**
 * Implementation of hook_token_values() for Pathauto specific tokens
 */
function pathauto_token_values($type, $object = NULL) {

  if (module_exists('taxonomy')) {
    switch ($type) {
      case 'node':
        $vid = db_result(db_query("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 LIMIT 1", $object->nid));
        $category = db_fetch_object(db_query("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 LIMIT 1", $vid, $object->nid));
        $category->vid = $vid;
      case 'taxonomy':
        if (!isset($category)) {
          $category = $object;
        }
        
        $parents = taxonomy_get_parents_all($category->tid);
        foreach ($parents as $parent) {
          // Replace any / characters in individual terms which might create confusing URLs
          $separator = variable_get('pathauto_separator', '-');
          $catpath = preg_replace('/\//', '', $parent->name) .'/'. $catpath;
        }
        $values['catpath'] = $catpath;
        
        if ($type == 'taxonomy') { 
          $values['cat'] = $category->name;
        }
        
        $values['catalias'] = drupal_get_path_alias('taxonomy/term/'.$category->tid);
        if (!strncasecmp($values['catalias'], 'taxonomy', 8)) {
          $values['catalias'] = $values['cat'];
        }
        
        
        break;
    }
  }
  // Provide some defaults if they aren't set.
  if (!isset($values['catpath'])) {
    $values['catpath'] = '';
    $values['catalias'] = '';
  }

  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 /.");
      $tokens['taxonomy']['catalias'] = t("URL alias for the category.");
    }
    if ($type == 'node' || $type == 'all') {
      $tokens['node']['catpath'] = t("As [cat], but including its supercategories separated by /.");
      $tokens['node']['catalias'] = t("URL alias for the term.");
    }
  }
  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
  $objects = _pathauto_objects_to_delete();
  foreach ($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' => t($label),
                                            '#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.  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_id, $form_values) {
  foreach ($form_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.'));
      }
      $objects = _pathauto_objects_to_delete();
      if (array_key_exists($key, $objects)) {
        drupal_set_message($key);
        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_objects_to_delete() {
  return array('user/' => t('users'), 'node/' => t('content') , 'taxonomy/' => t('vocabularies and terms'), 'blog/' => t('user blogs'), 'user/%/track' => t('user trackers'));
}

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

/**
 * Implementation of hook_nodeapi().
 */
function pathauto_nodeapi(&$node, $op, $teaser, $page) {
  _pathauto_include();
  if (module_exists('path')) {
    switch ($op) {
      case 'insert':
      case 'update':
        if ($node->pathauto_perform_alias || !isset($node->pathauto_perform_alias)) {
          $placeholders = pathauto_get_placeholders('node', $node);
          $src = "node/$node->nid";
          $alias = pathauto_create_alias('node', $op, $placeholders, $src, $node->type);
        }
        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($formid, &$form) {
  if (isset($form['#id']) && ($form['#id'] == 'node-form')) {
    if (user_access('create url aliases')) {
      $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="/admin/settings/pathauto">Pathauto settings</a>.');
      }

      drupal_add_js(drupal_get_path('module', 'pathauto') . '/pathauto.js');

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

//==============================================================================
// 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);
          }
          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('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);
        if (module_exists('blog')) {
          $src = 'blog/'. $user->uid;
          $alias = pathauto_create_alias('blog', $op, $placeholders, $src);
        }
        if (module_exists('tracker')) {
          $src = 'user/'. $user->uid .'/track';
          $alias = pathauto_create_alias('tracker', $op, $placeholders, $src);
        }
      }
      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;
  }
}