modules/vote_up_down/vote_up_down.module

<?php
// $Id: vote_up_down.module,v 1.23 2008/10/02 13:17:13 lut4rp Exp $

/**
 * @file
 * vote_up_down is a module that adds a widget for +1/-1 votes on nodes.
 * It depends upon Voting API.
 * It's based upon "simplevote.module".
 */

// if (module_exists('views')) {
//   module_load_include('inc', 'vote_up_down', 'ote_up_down_views');
// }

if (module_exists('actions')) {
  module_load_include('inc', 'vote_up_down', 'vote_up_down_actions');
}

/**
 * Implementation of hook_help().
 */
function vote_up_down_help($path, $arg) {
  switch ($path) {
    case 'admin/help#vote_up_down':
      return t('<p>This module is used to add a up/down voting widget to selected node types. (Part of Vote up/down package)</p>');
  }
}

/**
 * Implementation of hook_perm().
 */
function vote_up_down_perm() {
  return array('view up/down votes', 'use vote up/down', 'access vote up/down statistics', 'administer vote up/down');
}

/**
 * Implementation of hook_settings().
 */
function vote_up_down_admin_settings() {

  $form['vote_node_types'] = array(
    '#type' => 'fieldset',
    '#title' => t('Node types'),
    '#description' => t('Set the node types you want to activate voting on.'),
    '#collapsible' => TRUE,
  );
  $form['vote_node_types']['vote_up_down_node_types'] = array(
    '#type' => 'checkboxes',
    '#title' => t('Types'),
    '#default_value' => variable_get('vote_up_down_node_types', array()),
    '#options' => node_get_types('names'),
  );

  $form['vote_widget_settings_node'] = array(
    '#type' => 'fieldset',
    '#title' => t('Vote widget settings for nodes'),
    '#description' => t('For more control over the voting widget placement it can be inserted directly in the theme, see the included template.php and node-storylink.tpl.php for an example. When this method is used, turn off the widget display here.'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['vote_widget_settings_node']['vote_up_down_widget_style_node'] = array(
    '#type' => 'radios',
    '#title' => t('Vote widget style'),
    '#default_value' => variable_get('vote_up_down_widget_style_node', 0),
    '#options' => array(0 => t('Default +1/-1 vote style'), 1 => t('Alternative +1 vote style')),
    '#description' => t('If set to alternative style it\'s recomended to turn off the link display of vote points.'),
  );
  $form['vote_widget_settings_node']['vote_up_down_widget_node'] = array(
    '#type' => 'select',
    '#title' => t('Vote widget display'),
    '#default_value' => variable_get('vote_up_down_widget_node', 3),
    '#options' => array(0 => t('Disabled'), 1 => t('Teaser view'), 2 => t('Full-page view'), 3 => t('Teasers and full-page view')),
    '#description' => t('When to display the vote widget for nodes.'),
  );
  $form['vote_widget_settings_node']['vote_up_down_link_node'] = array(
    '#type' => 'select',
    '#title' => t('Link display of vote points'),
    '#default_value' => variable_get('vote_up_down_link_node', 3),
    '#options' => array(0 => t('Disabled'), 1 => t('Teaser view'), 2 => t('Full-page view'), 3 => t('Teasers and full-page view')),
    '#description' => t('When to display vote points for nodes.'),
  );

  $form['vote_widget_settings_comment'] = array(
    '#type' => 'fieldset',
    '#title' => t('Vote widget settings for comments'),
    '#description' => t('For more control over the voting widget placement it can be inserted directly in the theme, see the included node-storylink.tpl.php for an example. When this metod is used turn off the widget display here.'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['vote_widget_settings_comment']['vote_up_down_widget_style_comment'] = array(
    '#type' => 'radios',
    '#title' => t('Vote widget style'),
    '#default_value' => variable_get('vote_up_down_widget_style_comment', 0),
    '#options' => array(0 => t('Default +1/-1 vote style'), 1 => t('Alternative +1 vote style')),
    '#description' => t('If set to alternative style it\'s recomended to turn off the link display of vote points.'),
  );
  $form['vote_widget_settings_comment']['vote_up_down_widget_comment'] = array(
    '#type' => 'radios',
    '#title' => t('Vote widget display'),
    '#default_value' => variable_get('vote_up_down_widget_comment', 1),
    '#options' => array(0 => t('Do not display widget'), 1 => t('Display widget')),
  );
  $form['vote_widget_settings_comment']['vote_up_down_link_comment'] = array(
    '#type' => 'radios',
    '#title' => t('Link display of vote points'),
    '#default_value' => variable_get('vote_up_down_link_comment', 1),
    '#options' => array(0 => t('Do not display link'), 1 => t('Display link')),
  );

  $form['vote_widget_settings_advanced'] = array(
    '#type' => 'fieldset',
    '#title' => t('Advanced settings'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['vote_widget_settings_advanced']['vote_up_down_tag'] = array(
    '#type' => 'textfield',
    '#title' => t('Vote tag'),
    '#default_value' => variable_get('vote_up_down_tag', 'vote'),
    '#description' => t('All votes from the Vote up/down module will be tagged with this term. Using a unique value here may be useful when you deploy various voting modules that all use the Voting API. (Default: vote)'),
  );
  $form['vote_widget_settings_advanced']['vote_up_down_anonymous_vote'] = array(
    '#type' => 'radios',
    '#title' => t('Allow anonymous voting'),
    '#default_value' => variable_get('vote_up_down_anonymous_vote', 0),
    '#options' => array(0 => t('No'), 1 => t('Yes')),
    '#description' => t('If yes anonymous users may cast votes, restricted to one vote per day and IP address.'),
  );
  $form['vote_widget_settings_advanced']['vote_up_down_reset_vote'] = array(
    '#type' => 'radios',
    '#title' => t('Allow users to reset their votes'),
    '#default_value' => variable_get('vote_up_down_reset_vote', 0),
    '#options' => array(0 => t('No'), 1 => t('Yes')),
    '#description' => t('If yes a link will be displayd on nodes and commets that will reset the users votes on that node/comment.'),
  );

  return system_settings_form($form);
}

/**
 * Implementation of hook_menu().
 */
function vote_up_down_menu() {
  $items = array();

  $items['admin/settings/voteupdown'] = array(
    'title' => 'Vote up/down',
    'description' => 'Control the functions of Vote up/down.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('vote_up_down_admin_settings'),
    'access arguments' => array('administer vote up/down'),
    'type' => MENU_NORMAL_ITEM
  );

  $items['vote_up_down'] = array(
    'title' => 'Vote on content',
    'page callback' => 'vote_up_down_vote',
    'access arguments' => array('use vote up/down'),
    'type' => MENU_CALLBACK
  );

  $items['voteupdown'] = array(
    'title' => 'Vote up/down',
    'description' => 'Vote up/down vote summaries.',
    'page callback' => 'vote_up_down_page',
    'access arguments' => array('access vote up/down statistics'),
  );

  $items['voteupdown/usersvotes'] = array(
    'title' => 'Users by votes',
    'page callback' => 'vote_up_down_page',
    'access arguments' => array('access vote up/down statistics'),
  );

  if (arg(0) == 'node' && is_numeric(arg(1))) {
    $node = node_load(arg(1));
    $vote_access = (user_access('access vote up/down statistics') && in_array($node->type, variable_get('vote_up_down_node_types', array()), TRUE));
    $items['node/'.'%'.'/votesupdown'] = array(
      'title' => 'Votes',
      'page callback' => 'vote_up_down_tracker',
      'access arguments' => $vote_access,
      'weight' => 5,
      'type' => MENU_LOCAL_TASK
    );
  }
  

  if (arg(0) == 'user' && is_numeric(arg(1))) {
    $items['user/'.'%'.'/votesupdown'] = array(
      'title' => 'Votes',
      'page callback' => 'vote_up_down_user_votes',
      'access arguments' => array('access vote up/down statistics'),
      'weight' => 5,
      'type' => MENU_LOCAL_TASK
    );
  }
  
  drupal_add_css(drupal_get_path('module', 'vote_up_down') .'/vote_up_down.css');
  drupal_add_js(drupal_get_path('module', 'vote_up_down') .'/ajax_vote_up_down.js');

  return $items;
}

/**
 * Implementation of hook_nodeapi().
 */
function vote_up_down_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
  switch ($op) {
    case 'view':
      $node_type = in_array($node->type, variable_get('vote_up_down_node_types', array()), TRUE);
      if ($node_type) {
        $style = variable_get('vote_up_down_widget_style_node', 0) == 1 ? '_alt' : '';
        if ($teaser && variable_get('vote_up_down_widget_node', 0) && variable_get('vote_up_down_widget_node', 0) != 2) {
          $node->content['vote_up_down'] = array(
            '#value' => theme("vote_up_down_widget$style", $node->nid, 'node'),
            '#weight' => -10,
          );
        }
        else if (!$teaser && variable_get('vote_up_down_widget_node', 0) > 1) {
          $node->content['vote_up_down'] = array(
            '#value' => theme("vote_up_down_widget$style", $node->nid, 'node'),
            '#weight' => -10,
          );
        }
      }
      break;
  }
}

/**
 * Implementation of hook_comment().
 */
function vote_up_down_comment(&$comment, $op) {
  switch ($op) {
    case 'view':
      if (variable_get('vote_up_down_widget_comment', 1)) {
        $style = variable_get('vote_up_down_widget_style_comment', 0) == 1 ? '_alt' : '';
        $comment->comment = theme("vote_up_down_widget$style", $comment->cid, 'comment') . $comment->comment;
      }
      break;
  }
}

/**
 * Implementation of hook_link().
 */
function vote_up_down_link($type, $node = NULL, $teaser = FALSE) {
  $links = array();
  switch ($type) {
    case 'node':
      $node_type = in_array($node->type, variable_get('vote_up_down_node_types', array()), TRUE);
      if ($node_type && user_access('view up/down votes')) {
        if (variable_get('vote_up_down_reset_vote', 0) && user_access('use vote up/down')) {
          $links['vote_up_down_reset'] = array(
            'title' => t('Reset vote'),
            'href' => "vote_up_down/$type/$node->nid/0",
            'attributes' => array('title' => t('Reset your vote.')),
            'query' => drupal_get_destination()
          );
        }
        if ($teaser && variable_get('vote_up_down_link_node', 0) && variable_get('vote_up_down_link_node', 0) != 2) {
          $links['vote_up_down_points'] = theme('vote_up_down_points', $node->nid, $type, TRUE);
        }
        else if (!$teaser && variable_get('vote_up_down_link_node', 0) > 1) {
          $links['vote_up_down_points'] = theme('vote_up_down_points', $node->nid, $type, TRUE);
        }
      }
      break;
    case 'comment':
      if (variable_get('vote_up_down_reset_vote', 0) && user_access('use vote up/down') && variable_get('vote_up_down_widget_comment', 0)) {
        $links['vote_up_down_reset_c'] = array(
          'title' => t('Reset vote'),
          'href' => "vote_up_down/$type/$node->cid/0",
          'attributes' => array('title' => t('Reset your vote.')),
          'query' => drupal_get_destination()
        );
      }
      if (variable_get('vote_up_down_link_comment', 0) && user_access('view up/down votes')) {
        $links['vote_up_down_points_c'] = theme('vote_up_down_points', $node->cid, $type, TRUE);
      }
      break;
  }

  return $links;
}

/**
 * Implementation of hook_block().
 */
function vote_up_down_block($op = 'list', $delta = 0) {
  if ($op == 'list') {
    $blocks[0]['info'] = t('Who voted on it');
    $blocks[1]['info'] = t('Details');
    return $blocks;
  }
  else if ($op == 'view') {
    if (user_access('access content')) {
      switch ($delta) {
        case 0:
          if (arg(0) == 'node' & is_numeric(arg(1))) {
            $title = t('Who voted on it');
            $nid = arg(1);
            $items = array();
            $votes = votingapi_get_content_votes('node', $nid);
            foreach ($votes as $vote) {
              $account = user_load(array('uid' => $vote[0]->uid, 'status' => 1));
              $items[] = theme('username', $account) .' ('. $vote[0]->value .')';
            }
            $output = theme('item_list', $items);
          }
          break;

        case 1:
          if (arg(0) == 'node' & is_numeric(arg(1))) {
            $title = t('Details');
            $items = array();
            $votes = votingapi_get_content_votes('node', $node->nid);
            $output = theme('item_list', $items);
          }
          break;
      }

      $block['subject'] = $title;
      $block['content'] = $output;

      return $block;
    }
  }
}

/**
 * Implementation of hook_userpoints().
 */
function vote_up_down_userpoints($op, $points = 0, $uid = 0, $event = NULL, $description = NULL) {
  switch ($op) {
    case 'setting':
      $form['vote_updown_points'] = array(
          '#type' => 'fieldset',
          '#collapsible' => TRUE,
          '#collapsed' => TRUE,
          '#title' => t('Vote up/down points'),
      );

      $form['vote_updown_points']['userpoints_vote_up_down'] = array(
        '#type' => 'textfield',
        '#title' => t('Points for voting on a node (requires the Vote up/down module)'),
        '#default_value' => variable_get('userpoints_vote_up_down', 0),
        '#size' => 5,
        '#maxlength' => 5,
      );
      $form['vote_updown_points']['userpoints_actions'] = array(
        '#type' => 'textfield',
        '#title' => t('Points for actions (requires the Actions module)'),
        '#default_value' => variable_get('userpoints_actions', 0),
        '#size' => 5,
        '#maxlength' => 5,
      );

      return $form;
      break;
  }
}

/*
 * Menu callback; Handles voteupdown and subpages.
 */
function vote_up_down_page() {
  $op = arg(1);

  switch ($op) {
    case 'usersvotes':
      $output = vote_up_down_users_votes();
      break;
    default:
      $items = array();
      $items[] = l(t('Users by votes'), 'voteupdown/usersvotes');
      $output = theme('item_list', $items, t('Vote up/down statistics'));
  }

  return $output;
}

/*
 * Users votes page for the vote_up_down data
 */
function vote_up_down_users_votes() {
  $sql = "SELECT COUNT(v.value) AS number_votes, SUM(v.value) AS total_votes, v.uid, v.tag, u.uid, u.name FROM {votingapi_vote} v INNER JOIN {users} u on v.uid = u.uid WHERE v.tag = '%s' GROUP BY u.name";
  $sql_cnt = "SELECT COUNT(DISTINCT(uid)) FROM {votingapi_vote}";
  $header = array(
    array('data' => t('User'), 'field' => 'u.name'),
    array('data' => t('Votes'), 'field' => 'number_votes', 'sort' => 'desc'),
    array('data' => t('Vote sum'), 'field' => 'total_votes'),
  );
  $sql .= tablesort_sql($header);
  $result = pager_query($sql, 30, 0, $sql_cnt, variable_get('vote_up_down_tag', 'vote'));
  while ($vote = db_fetch_object($result)) {
    $rows[] = array(
      theme('username', $vote),
      $vote->number_votes,
      $vote->total_votes
    );
  }
  drupal_set_title(t('Users by votes'));
  $output = theme('table', $header, $rows);
  $output .= theme('pager', NULL, 30, 0);

  return $output;
}

/*
 * Menu callback; display all votes for a node.
 */
function vote_up_down_tracker() {
  if ($node = node_load(arg(1))) {
    $header = array(
      array('data' => t('User')),
      array('data' => t('Vote')),
      array('data' => t('Date'))
    );
    $votes = votingapi_get_content_votes('node', $node->nid);
    foreach ($votes as $vote) {
      $account = user_load(array('uid' => $vote[0]->uid, 'status' => 1));
      $rows[] = array(
        theme('username', $account),
        $vote[0]->value,
        array('data' => format_date($vote[0]->timestamp, 'small'), 'class' => 'nowrap')
      );
    }
    drupal_set_title(check_plain($node->title));
    $output = theme('table', $header, $rows);
    $output .= theme('pager', NULL, 30);

    return $output;
  }
  else {
    drupal_not_found();
  }
}

/*
 * Menu callback; display all votes for a user.
 */
function vote_up_down_user_votes() {
  if ($account = user_load(array('uid' => arg(1), 'status' => 1))) {
    if ($account->status || user_access('administer users')) {
      $header = array(
        array('data' => t('Node')),
        array('data' => t('Vote')),
        array('data' => t('Date'))
      );
      $sql = db_rewrite_sql("SELECT n.nid, n.title, v.value, v.timestamp FROM {node} n LEFT JOIN {votingapi_vote} v ON n.nid = v.content_id WHERE v.uid = %d AND v.tag = '%s' AND v.content_type = 'node' AND n.status = 1 ORDER BY v.timestamp DESC");
      $result = pager_query($sql, 25, 0, NULL, $account->uid, variable_get('vote_up_down_tag', 'vote'));
      while ($node = db_fetch_object($result)) {
        $rows[] = array(
          l($node->title, 'node/'. $node->nid),
          $node->value,
          t('!time ago', array('!time' => format_interval(time() - $node->timestamp)))
        );
      }
      drupal_set_title(check_plain($account->name));
      $output = theme('table', $header, $rows);
      $output .= theme('pager', NULL, 25);

      return $output;
    }
    else {
      drupal_access_denied();
    }
  }
  else {
    drupal_not_found();
  }
}

/**
 * An voting get handler with AJAX support
 */
function vote_up_down_vote($type, $cid, $value, $ajax = FALSE, $alt = FALSE) {
  if (is_numeric($cid) && is_numeric($value)) {

    // Sanity-check the incoming values.
    if ($value > 0) {
      $vote->value = 1;
    }
    else if ($value < 0) {
      $vote->value = -1;
    }
    else {
      $vote->value = 0;
    }

    $vote->value_type = 'points';
    $vote->tag = variable_get('vote_up_down_tag', 'vote');

    // Userpoints integration.
    if (module_exists('userpoints')) {
      global $user;
      if ($type == 'node') {
        $node = db_fetch_object(db_query(db_rewrite_sql('SELECT n.uid FROM {node} n WHERE n.nid = %d'), $cid));
      }
      else {
        $node = db_fetch_object(db_query(db_rewrite_sql('SELECT c.uid FROM {comments} c WHERE c.cid = %d'), $cid));
      }
      $user_vote = votingapi_get_user_votes($type, $cid, $user->uid);
      if ($user->uid && !$user_vote && ($node->uid != $user->uid) && ($vote->value != 0)) {
        userpoints_userpointsapi('points', variable_get('userpoints_vote_up_down', 0), $user->uid, 'Vote up/down points');
      }
    }

    // Do the voting via voting api.
    if ($uid = _vote_up_down_get_uid()) {
      if ($vote->value == 0) {
        votingapi_unset_vote($type, $cid, $uid);
      }
      else {
        votingapi_set_vote($type, $cid, $vote, $uid);
      }
    }

    if ($ajax) {
      $style = ($alt == TRUE ? '_alt' : '');
      print theme("vote_up_down_points$style", $cid, $type);
      exit();
    }
    else {
      drupal_goto(drupal_get_destination());
    }
  }
}

function theme_vote_up_down_widget($cid, $type) {
  global $user;

  if (user_access('view up/down votes')) {

    $output = '<div class="vote-up-down-widget">';

    if (user_access('use vote up/down') && ($user->uid || variable_get('vote_up_down_anonymous_vote', 0))) {
      $user_vote = votingapi_get_user_votes($type, $cid, _vote_up_down_get_uid());

      if ($user_vote[0]->value > 0) {
        $class = 'vote-up-act';
        $class2 = 'vote-down-inact';
      }
      else if ($user_vote[0]->value < 0) {
        $class = 'vote-up-inact';
        $class2 = 'vote-down-act';
      }
      else {
        $class = 'vote-up-inact';
        $class2 = 'vote-down-inact';
      }

      $output .= '<span id="vote_up_'. $type .'_'. $cid .'" class="'. $class .'" title="'. url("vote_up_down/$type/$cid/1/1") .'">'. /* TODO
   Please manually fix the parameters on the l() or url() function on the next line.
   Typically, this was not changed because of a function call inside an array call like
   array('title' => t('View user profile.')).*/
l('', "vote_up_down/$type/$cid/1", array('class' => $class, 'title' => t('Vote up')), drupal_get_destination(), NULL, FALSE, TRUE) .'</span>';
      $output .= '<span id="vote_down_'. $type .'_'. $cid .'" class="'. $class2 .'" title="'. url("vote_up_down/$type/$cid/-1/1") .'">'. /* TODO
   Please manually fix the parameters on the l() or url() function on the next line.
   Typically, this was not changed because of a function call inside an array call like
   array('title' => t('View user profile.')).*/
l('', "vote_up_down/$type/$cid/-1", array('class' => $class2, 'title' => t('Vote down')), drupal_get_destination(), NULL, FALSE, TRUE) .'</span>';
    }
    else {
      $output .= '<span class="up-inact" title="'. t('You must login to vote.') .'"></span>';
      $output .= '<span class="down-inact" title="'. t('You must login to vote.') .'"></span>';
    }

    $output .= '</div>';

    return $output;
  }
}

function theme_vote_up_down_widget_alt($cid, $type) {
  global $user;

  if (user_access('view up/down votes')) {

    $output = '<div class="vote-up-down-widget-alt">';
    $output .= theme('vote_up_down_points_alt', $cid, $type);

    if (user_access('use vote up/down') && ($user->uid || variable_get('vote_up_down_anonymous_vote', 0))) {
      $user_vote = votingapi_get_user_votes($type, $cid, _vote_up_down_get_uid());

      if ($user_vote[0]->value > 0) {
        $class = 'vote-up-act';
      }
      else {
        $class = 'vote-up-inact';
      }

      $output .= '<span id="vote_up_'. $type .'_'. $cid .'" class="'. $class .'" title="'. url("vote_up_down/$type/$cid/1/1/1") .'">'. /* TODO
   Please manually fix the parameters on the l() or url() function on the next line.
   Typically, this was not changed because of a function call inside an array call like
   array('title' => t('View user profile.')).*/
l('', "vote_up_down/$type/$cid/1", array('class' => $class, 'title' => t('Vote')), drupal_get_destination(), NULL, FALSE, TRUE) .'</span>';

    }
    else {
      $output .= '<span class="up-inact" title="'. t('You must login to vote.') .'"></span>';
    }

    $output .= '</div>';

    return $output;
  }
}

function theme_vote_up_down_points($cid, $type, $nodelink = FALSE) {
  $vote_result = votingapi_get_voting_result($type, $cid, 'points', variable_get('vote_up_down_tag', 'vote'), 'sum');
  if ($nodelink) {
    if ($vote_result) {
      $output = array(
        'title' => '<span id="vote_points_'. $type .'_'. $cid .'" class="vote-points">'. format_plural($vote_result->value, '1 point', '@count points') .'</span>',
        'html' => TRUE
      );
    }
    else {
      $output = array(
        'title' => '<span id="vote_points_'. $type .'_'. $cid .'" class="vote-points">'. t('0 points') .'</span>',
        'html' => TRUE
      );
    }
  }
  else {
    if ($vote_result) {
      $output = '<span id="vote_points_'. $type .'_'. $cid .'" class="vote-points">'. format_plural($vote_result->value, '1 point', '@count points') .'</span>';
    }
    else {
      $output = '<span id="vote_points_'. $type .'_'. $cid .'" class="vote-points">'. t('0 points') .'</span>';
    }
  }

  return $output;
}

function theme_vote_up_down_points_alt($cid, $type) {
  $vote_result = votingapi_get_voting_result($type, $cid, 'points', variable_get('vote_up_down_tag', 'vote'), 'sum');
  if ($vote_result) {
    $output = '<div id="vote_points_'. $type .'_'. $cid .'" class="vote-points">'. $vote_result->value;
  }
  else {
    $output = '<div id="vote_points_'. $type .'_'. $cid .'" class="vote-points">0';
  }

  $output .= '<div class="vote-points-label">'. format_plural($vote_result->value, 'point', 'points') .'</div></div>';

  return $output;
}

/**
 * Get a uid for anonymous vs. registered voting
 */
function _vote_up_down_get_uid() {
  global $user;

  if ($user->uid) {
    $uid = $user->uid;
  }
  else if (variable_get('vote_up_down_anonymous_vote', 0)) {
    // Fake uid for anonymous users.
    // If the IP is valid turn it into a integer and add the number of the current day.
    // The current day is what limit anonymous voting to one vote per day and IP address.
    $hostname = (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : ip_address();
    if ($long = ip2long($hostname)) {
      $uid = abs($long) + date('z');
    }
  }
  else {
    $uid = NULL;
  }

  return $uid;
}