cyoa.module

<?php


/*
 * Because I hate globals // FIXME
 */
function current_cyoacid($in_cyoac = NULL){
  static $cyoac = NULL;
  if ($in_cyoac) $cyoac = $in_cyoac;
  return $cyoac;
}


/*
 * Implementation of hook_views_api
 */
function cyoa_views_api() {
  return array(
    'api' => 2,
    'path' => drupal_get_path('module', 'cyoa'),
  );
}

/**
 * Implementation of hook_init().
 */
function cyoa_init() {
  global $user;
  if ($_GET['cyoa_start'] && drupal_get_token($_GET['cyoa_nid'] . ' - ' . $_GET['cyoac_nid']) == $_GET['token']) {
    //start a new enterally
    $vals = 
      array(
        'uid'=>$user->uid,
        'nid'=>$_GET['cyoa_nid'],
        'hostname' => ip_address(),
        'timestamp' => time(),
      );
    $inserted = drupal_write_record('cyoa',$vals);
   if ($inserted) {
     $vals = array(
      'nid'=>$_GET['cyoac_nid'],
      'cyoaid' =>  $vals['cyoaid'],
      'timestamp' => time(),
     );
      $inserted = drupal_write_record('cyoac',$vals);
      $vals = (object )$vals;
     current_cyoacid($vals); // set for choice
    }
  } elseif ($_GET['cyoacid'] && $_GET['token']
    &&  drupal_get_token($_GET['cyoacid'] . ' - ' . $_GET['cyoac_nid']) == $_GET['token']) 
  {
    if (db_result(db_query("SELECT 1 from {cyoac} where pcyoacid = %d",
      $_GET['cyoacid']))) {
      drupal_set_message("You have already followed this path");
    } else {
    $info =  db_fetch_object(db_query("SELECT * from {cyoac} where cyoacid=%d",$_GET['cyoacid']));
      $vals = array(
        'nid'=>$_GET['cyoac_nid'],
        'cyoaid' =>  $info->cyoaid,
        'timestamp' => time(),
        'pcyoacid' => $_GET['cyoacid'],
      );
      drupal_write_record('cyoac',$vals);
      $vals = (object )$vals;
      current_cyoacid($vals);
    }
  }
 
}


/**
 * Implementation of hook_field_formatter_info().
 */
function cyoa_field_formatter_info() {
  return array(
    'cyoas' => array(
      'label' => t('Start [cyoa]'),
      'field types' => array('nodereference'),
      'multiple values' => CONTENT_HANDLE_CORE,
    ),
    'cyoac' => array(
      'label' => t('Continue [cyoa]'),
      'field types' => array('nodereference'),
      'multiple values' => CONTENT_HANDLE_CORE,
    ),
  );
}



/**
 * Theme function for starting nodereference field formatter; this is how someone starts their adventure.
 */
function theme_cyoa_formatter_cyoas($element) {
  $output = '';
  static $choices;
  if (!empty($element['#item']['nid']) && is_numeric($element['#item']['nid']) && ($title = _nodereference_titles($element['#item']['nid']))) {
    $node = $element['#node'];
    $query = '';
    if ($node->nid) {
      $token = drupal_get_token($node->nid . ' - ' . $element['#item']['nid']);
      $query = array('cyoa_start'=>1, 'cyoa_nid'=>$node->nid, 'cyoac_nid'=> $element['#item']['nid'],'token'=>$token);
    }
    $output = l($title, 'node/'. $element['#item']['nid'],array('query'=>$query, 'attributes'=> array('rel' =>'nofollow')));
  }
  return $output;
}

/*
 * Formatter for 'continueing' the adventure
 */
function theme_cyoa_formatter_cyoac($element) {
  $output = '';
  if (!empty($element['#item']['nid']) && is_numeric($element['#item']['nid']) && ($title = _nodereference_titles($element['#item']['nid']))) {
    $node = $element['#node'];
    $query = '';
    $cyoac= current_cyoacid();
    
    if ($cyoac) {
      $cyoacid = $cyoac->cyoacid;
      if (!$choices[$cyoacid]) {
        $choices[$cyoacid] = db_fetch_object(db_query("SELECT * from {cyoac} where cyoacid=%d",$cyoacid));
      }
      if ( $node->nid == $choices[$cyoacid]->nid) {
        $token = drupal_get_token($cyoacid . ' - ' . $element['#item']['nid']);
        $query = array('cyoacid'=> $cyoacid, 'cyoac_nid'=> $element['#item']['nid'],'token'=>$token);
      }
    }
    $output = l($title, 'node/'. $element['#item']['nid'],array('query'=>$query,'attributes'=>array('rel'=>'nofollow')));
  }
  return $output;
}

/**
 * Implementation of hook_theme().
 */
function cyoa_theme() {
  return array(
    'cyoa_formatter_cyoac' => array(
      'arguments' => array('element'),
    ),
    'cyoa_formatter_cyoas' => array(
      'arguments' => array('element'),
    ),
  );
}