prev_next_views.module in Previous/Next API 6

File

prev_next_views.module

<?php

/**
 * Implementation of hook_prev_next_nid().
 */
function prev_next_views_prev_next_nid($nid, $op = 'next') {
  if (isset($_SESSION['prev_next_views'])) {

    // There's a prev_next views list stored for this session
    $index = array_search($nid, $_SESSION['prev_next_views']);
    if ($index !== FALSE) {

      // This node is part of the prev_next list, so return the appropriate node
      $ret = $index;
      if ($op == 'prev') {
        $ret--;
      }
      elseif ($op == 'next') {
        $ret++;
      }
      if ($ret >= 0 && $ret < count($_SESSION['prev_next_views'])) {
        return $_SESSION['prev_next_views'][$ret];
      }
      else {

        // First or last element of the view
        return 0;
      }
    }
  }
  return FALSE;
}

/**
 * Implementation of hook_perm().
 */
function prev_next_views_perm() {
  return array(
    'administer prev_next_views',
  );
}

/**
* Implementation of hook_menu().
*/
function prev_next_views_menu() {
  $items = array();
  $items['admin/settings/prev_next/views'] = array(
    'title' => 'Views',
    'page callback' => 'drupal_get_form',
    'page arguments' => array(
      'prev_next_views_settings',
    ),
    'access arguments' => array(
      'administer prev_next_views',
    ),
    'type' => MENU_LOCAL_TASK,
    'weight' => 10,
    'file' => 'prev_next_views.admin.inc',
  );
  return $items;
}

/**
 * Implementation of hook_nodeapi().
 */
function prev_next_views_nodeapi(&$node, $op) {
  if (isset($_SESSION['prev_next_views']) && array_search($node->nid, $_SESSION['prev_next_views']) === FALSE) {

    // The current node is no longer part of the views results, so forget about it
    unset($_SESSION['prev_next_views']);
  }
}

/**
 * Implementation of hook_views_api().
 */
function prev_next_views_views_api() {
  return array(
    'api' => 2,
  );
}

/**
 * Implementation of hook_views_pre_execute().
 */
function prev_next_views_views_pre_execute(&$view) {
  if (in_array($view->name, variable_get('prev_next_views_enabled', array()))) {
    $query = db_rewrite_sql($view->build_info['query'], $view->base_table, $view->base_field, array(
      'view' => &$view,
    ));
    $args = $view->build_info['query_args'];
    $result = db_query($query, $args);
    $nids = array();
    while ($item = db_fetch_array($result)) {
      $nids[] = $item['nid'];
    }
    $_SESSION['prev_next_views'] = $nids;
  }
}

Functions

Name	Description
prev_next_views_menu	Implementation of hook_menu().
prev_next_views_nodeapi	Implementation of hook_nodeapi().
prev_next_views_perm	Implementation of hook_perm().
prev_next_views_prev_next_nid	Implementation of hook_prev_next_nid().
prev_next_views_views_api	Implementation of hook_views_api().
prev_next_views_views_pre_execute	Implementation of hook_views_pre_execute().