userdeck.module

<?php

/**
 * @file
 * UserDeck module file.
 */

/**
 * Implements hook_menu().
 */
function userdeck_menu() {
  $items = array();

  $items['admin/config/content/userdeck'] = array(
    'title'            => 'UserDeck Settings',
    'description'      => 'Configure settings for the UserDeck system.',
    'page callback'    => 'drupal_get_form',
    'page arguments'   => array('userdeck_admin'),
    'access arguments' => array('administer site configuration'),
    'file'             => 'includes/userdeck.admin.inc',
  );

  $items['userdeck/guides/setkey/%/%'] = array(
    'title'            => 'UserDeck Settings',
    'description'      => 'Configure settings for the UserDeck system.',
    'page callback'    => 'userdeck_guides_setkey',
    'page arguments'   => array(3, 4),
    'access callback'  => TRUE,
  );

  return $items;
}

/**
 * Implements hook_node_view().
 */
function userdeck_node_view($node, $view_mode, $langcode) {
  if ('full' != $view_mode || !array_key_exists('body', $node->content) || FALSE === strpos($node->content['body'][0]['#markup'], 'userdeck_guides')) {
    return $node;
  }

  $node->content['body'][0]['#markup'] = preg_replace_callback("/\[userdeck_guides (.+?)]/", "userdeck_process_shortcode", $node->content['body'][0]['#markup']);

  return $node;
}

/**
 * Page callback for setting the UserDeck Guides key.
 */
function userdeck_guides_setkey($key, $nonce) {
  if (empty($_SERVER['HTTP_X_REQUESTED_WITH']) || strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest' || !$key || !$nonce) {
    drupal_not_found();
    return;
  }

  $set_nonce = variable_get('userdeck_guides_key_nonce', FALSE);
  if (!$set_nonce || $nonce != $set_nonce) {
    drupal_not_found();
    return;
  }

  variable_del('userdeck_guides_key_nonce');
  variable_set('userdeck_guides_key', $key);
}

/**
 * Builds a shortcode to add to be added to a page.
 */
function userdeck_get_guides_shortcode() {
  $guides_key = variable_get('userdeck_guides_key');

  if (!$guides_key) {
    return FALSE;
  }

  return "[userdeck_guides key='$guides_key']";
}

/**
 * Markup used to replace a Guides shortcode.
 */
function userdeck_output_guides_code($key) {
  return "<a href='http://userdeck.com' data-userdeck-guides='$key'>Customer Support Software</a>
		<script src='//widgets.userdeck.com/guides.js'></script>";
}

/**
 * A preg_replace callback that replaces a shortcode with markup.
 */
function userdeck_process_shortcode($matches) {
  $params = explode(" ", $matches[1]);
  foreach ($params as $param) {
    list($key, $val) = explode("=", $param);
    if ($key == 'key') {
      return userdeck_output_guides_code(str_replace("'", '', $val));
    }
  }

  return '';
}

/**
 * Builds a new basic page node with the Guides shortcode as the body.
 */
function userdeck_create_new_guides_page($title) {
  global $user;
  $node = new stdClass();
  $node->title = $title;
  $node->type = 'page';
  node_object_prepare($node);
  $node->language = LANGUAGE_NONE;
  $node->uid = $user->uid;
  $node->status = 1;
  $node->promote = 0;
  $node->comment = 0;
  $node->body[LANGUAGE_NONE][0]['value'] = userdeck_get_guides_shortcode();
  $node->body[LANGUAGE_NONE][0]['summary'] = 'Customer Support Software';
  $node->body[LANGUAGE_NONE][0]['format'] = filter_default_format();
  $node = node_submit($node);
  node_save($node);
  return $node->nid;
}

/**
 * Adds the Guides shortcode to the body of the given node.
 */
function userdeck_add_guide_to_page($nid) {
  $node = node_load($nid);
  if (!$node || !property_exists($node, 'body')) {
    return FALSE;
  }

  $node->body[LANGUAGE_NONE][0]['value'] .= userdeck_get_guides_shortcode();
  node_save($node);
  return $nid;
}