<?php

/**
 * @file
 * Class definition of FeedsNodeProcessor.
 */

/**
 * Creates nodes from feed items.
 */
class FeedsRelationProcessor extends FeedsProcessor {

  /**
   * Define entity type.
   */
  public function entityType() {
    return 'relation';
  }

  /**
   * Implements parent::entityInfo().
   */
  protected function entityInfo() {
    $info = parent::entityInfo();
    $info['label plural'] = t('Relations');
    return $info;
  }

  /**
   * Creates a new node in memory and returns it.
   */
  protected function newEntity(FeedsSource $source) {
    /*$node = new stdClass();
     $node->type = $this->bundle();
    $node->changed = REQUEST_TIME;
    $node->created = REQUEST_TIME;
    $node->language = LANGUAGE_NONE;
    $node->is_new = TRUE;
    node_object_prepare($node);
    // Populate properties that are set by node_object_prepare().
    $node->log = 'Created by FeedsNodeProcessor';
    $node->uid = $this->config['author'];
    */


    $relation = new stdClass();
    $relation->is_new = TRUE;

    $relation->relation_type = $this->bundle();
    $relation->uid = $this->config['author'];
    $relation->endpoints[LANGUAGE_NONE] = Null;

    $relation->changed = REQUEST_TIME;
    $relation->created = REQUEST_TIME;

    return $relation;

  }

  /**
   * Loads an existing node.
   *
   * If the update existing method is not FEEDS_UPDATE_EXISTING, only the node
   * table will be loaded, foregoing the node_load API for better performance.
   *
   * @todo Reevaluate the use of node_object_prepare().
   */
  protected function entityLoad(FeedsSource $source, $nid) {

    $node = relation_load($nid);

    if ($this->config['update_existing'] != FEEDS_UPDATE_EXISTING) {
      $node->uid = $this->config['author'];
    }

    /* node_object_prepare($node);

    // Workaround for issue #1247506. See #1245094 for backstory.
    if (!empty($node->menu)) {
    // If the node has a menu item(with a valid mlid) it must be flagged
    // 'enabled'.
    $node->menu['enabled'] = (int) (bool) $node->menu['mlid'];
    }
    */
    // Populate properties that are set by node_object_prepare().
    if ($this->config['update_existing'] == FEEDS_UPDATE_EXISTING) {
      $node->log = 'Updated by FeedsNodeProcessor';
    }
    else {
      $node->log = 'Replaced by FeedsNodeProcessor';
    }
    return $node;
  }

  /**
   * Check that the user has permission to save a node.
   */
  protected function entitySaveAccess($entity) {

    // The check will be skipped for anonymous nodes.
    if ($this->config['authorize'] && !empty($entity->uid)) {

      $author = user_load($entity->uid);

      // If the uid was mapped directly, rather than by email or username, it
      // could be invalid.
      if (!$author) {
        $message = 'User %uid is not a valid user.';
        throw new FeedsAccessException(t($message, array('%uid' => $entity->uid)));
      }

      if (empty($entity->nid) || !empty($entity->is_new)) {
        $op = 'create';
        $access = node_access($op, $entity->type, $author);
      }
      else {
        $op = 'update';
        $access = node_access($op, $entity, $author);
      }

      if (!$access) {
        $message = 'User %name is not authorized to %op content type %content_type.';
        throw new FeedsAccessException(t($message, array('%name' => $author->name, '%op' => $op, '%content_type' => $entity->type)));
      }
    }
  }

  /**
   * Validates a node.
   */
  protected function entityValidate($entity) {
    if (!isset($entity->uid) || !is_numeric($entity->uid)) {
      $entity->uid = $this->config['author'];
    }
  }
  /**
   * Save a node.
   */
  public function entitySave($entity) {

    relation_save($entity);
  }

  /**
   * Delete a series of nodes.
   */
  protected function entityDeleteMultiple($nids) {
    relation_delete_multiple($nids);
  }

  /**
   * Implement expire().
   *
   * @todo: move to processor stage?
   */
  public function expire($time = NULL) {
    if ($time === NULL) {
      $time = $this->expiryTime();
    }
    if ($time == FEEDS_EXPIRE_NEVER) {
      return;
    }
    $count = $this->getLimit();
    $nodes = db_query_range("SELECT n.nid FROM {node} n JOIN {feeds_item} fi ON fi.entity_type = 'node' AND n.nid = fi.entity_id WHERE fi.id = :id AND n.created < :created", 0, $count, array(':id' => $this->id, ':created' => REQUEST_TIME - $time));
    $nids = array();
    foreach ($nodes as $node) {
      $nids[$node->nid] = $node->nid;
    }
    $this->entityDeleteMultiple($nids);
    if (db_query_range("SELECT 1 FROM {node} n JOIN {feeds_item} fi ON fi.entity_type = 'node' AND n.nid = fi.entity_id WHERE fi.id = :id AND n.created < :created", 0, 1, array(':id' => $this->id, ':created' => REQUEST_TIME - $time))->fetchField()) {
      return FEEDS_BATCH_ACTIVE;
    }
    return FEEDS_BATCH_COMPLETE;
  }

  /**
   * Return expiry time.
   */
  public function expiryTime() {
    return $this->config['expire'];
  }

  /**
   * Override parent::configDefaults().
   */
  public function configDefaults() {
    return array(
        'expire' => FEEDS_EXPIRE_NEVER,
        'author' => 0,
        'authorize' => TRUE,
    ) + parent::configDefaults();
  }

  /**
   * Override parent::configForm().
   */
  public function configForm(&$form_state) {
    $form = parent::configForm($form_state);

    $author = user_load($this->config['author']);


    $options =$this->bundleOptions();
      $form['bundle'] = array(
          '#type' => 'select',
          '#options' => $options,
          '#title' => !empty($info['bundle name']) ? $info['bundle name'] : t('Bundle'),
          '#required' => false,
          '#description' => t('if set to generic, relation_name has to be one of the mappings'),
          '#default_value' => "generic",
      );





    $form['author'] = array(
        '#type' => 'textfield',
        '#title' => t('Author'),
        '#description' => t('Select the author of the nodes to be created - leave empty to assign "anonymous".'),
        '#autocomplete_path' => 'user/autocomplete',
        '#default_value' => empty($author->name) ?  'anonymous' : check_plain($author->name),
    );
    $form['authorize'] = array(
        '#type' => 'checkbox',
        '#title' => t('Authorize'),
        '#description' => t('Check that the author has permission to create the node.'),
        '#default_value' => $this->config['authorize'],
    );
    $period = drupal_map_assoc(array(FEEDS_EXPIRE_NEVER, 3600, 10800, 21600, 43200, 86400, 259200, 604800, 2592000, 2592000 * 3, 2592000 * 6, 31536000), 'feeds_format_expire');
    $form['expire'] = array(
        '#type' => 'select',
        '#title' => t('Expire nodes'),
        '#options' => $period,
        '#description' => t('Select after how much time nodes should be deleted. The node\'s published date will be used for determining the node\'s age, see Mapping settings.'),
        '#default_value' => $this->config['expire'],
    );
    return $form;
  }

  /**
   * Override parent::configFormValidate().
   */
  public function configFormValidate(&$values) {
    if ($author = user_load_by_name($values['author'])) {
      $values['author'] = $author->uid;
    }
    else {
      $values['author'] = 0;
    }
  }

  /**
   * Reschedule if expiry time changes.
   */
  public function configFormSubmit(&$values) {
    if ($this->config['expire'] != $values['expire']) {
      feeds_reschedule($this->id);
    }
    parent::configFormSubmit($values);
  }

  /**
   * Override setTargetElement to operate on a target item that is a node.
   */
  public function setTargetElement(FeedsSource $source, $target_node, $target_element, $value) {
    switch ($target_element) {
      case 'created':
        $target_node->created = feeds_to_unixtime($value, REQUEST_TIME);
        break;
      case 'feeds_source':
        // Get the class of the feed node importer's fetcher and set the source
        // property. See feeds_node_update() how $node->feeds gets stored.
        if ($id = feeds_get_importer_id($this->bundle())) {
          $class = get_class(feeds_importer($id)->fetcher);
          $target_node->feeds[$class]['source'] = $value;
          // This effectively suppresses 'import on submission' feature.
          // See feeds_node_insert().
          $target_node->feeds['suppress_import'] = TRUE;
        }
        break;
      case 'user_name':
        if ($user = user_load_by_name($value)) {
          $target_node->uid = $user->uid;
        }
        break;
      case 'user_mail':
        if ($user = user_load_by_mail($value)) {
          $target_node->uid = $user->uid;
        }
        break;
      default:
        parent::setTargetElement($source, $target_node, $target_element, $value);
        break;
    }
  }

  /**
   * Return available mapping targets.
   */
  public function getMappingTargets() {
    $type = relation_type_load($this->bundle());

    $targets = parent::getMappingTargets();

    $targets['source_id'] = array(
        'name' => t('Source Field'),
        'description' => t('Source.'),
        'optional_unique' => FALSE,
    );

    $targets['target_id'] = array(
        'name' => t('Target Field'),
        'description' => t('Target.'),
        'optional_unique' => FALSE,
    );


    $targets['relation_name'] = array(
        'name' => t('Relation type'),
        'description' => t('Target.'),
        'optional_unique' => FALSE,
    );


    $targets['nid'] = array(
        'name' => t('Node ID'),
        'description' => t('The nid of the node. NOTE: use this feature with care, node ids are usually assigned by Drupal.'),
        'optional_unique' => TRUE,
    );
    $targets['uid'] = array(
        'name' => t('User ID'),
        'description' => t('The Drupal user ID of the node author.'),
    );
    $targets['user_name'] = array(
        'name' => t('Username'),
        'description' => t('The Drupal username of the node author.'),
    );
    $targets['user_mail'] = array(
        'name' => t('User email'),
        'description' => t('The email address of the node author.'),
    );
    $targets['status'] = array(
        'name' => t('Published status'),
        'description' => t('Whether a node is published or not. 1 stands for published, 0 for not published.'),
    );
    $targets['created'] = array(
        'name' => t('Published date'),
        'description' => t('The UNIX time when a node has been published.'),
    );

    // Include language field if Locale module is enabled.
    if (module_exists('locale')) {
      $targets['language'] = array(
          'name' => t('Language'),
          'description' => t('The two-character language code of the node.'),
      );
    }


    // If the target content type is a Feed node, expose its source field.
    if ($id = feeds_get_importer_id($this->bundle())) {
      $name = feeds_importer($id)->config['name'];
      $targets['feeds_source'] = array(
          'name' => t('Feed source'),
          'description' => t('The content type created by this processor is a Feed Node, it represents a source itself. Depending on the fetcher selected on the importer "@importer", this field is expected to be for example a URL or a path to a file.', array('@importer' => $name)),
          'optional_unique' => TRUE,
      );
    }

    // Let other modules expose mapping targets.
    self::loadMappers();

    // load nodes mapper
    require_once("nodes.inc");
    //$entity_type = $this->entityType();
    $entity_type = "relation";
    $bundle = $this->bundle();

    #drupal_alter('feeds_processor_targets', $targets, $entity_type, $bundle);
    relation_feeds_processor_targets_alter($targets, $entity_type, $bundle);
    return $targets;
  }

  /**
   * Get nid of an existing feed item node if available.
   */
  protected function existingEntityId(FeedsSource $source, FeedsParserResult $result) {
    if ($nid = parent::existingEntityId($source, $result)) {
      return $nid;
    }

    // Iterate through all unique targets and test whether they do already
    // exist in the database.
    foreach ($this->uniqueTargets($source, $result) as $target => $value) {
      switch ($target) {
        case 'nid':
          $nid = db_query("SELECT rid FROM {relation} WHERE rid = :rid", array(':rid' => $value))->fetchField();
          break;
        case 'title':
          $nid = db_query("SELECT rid FROM {relation} WHERE title = :title AND type = :type", array(':title' => $value, ':type' => $this->bundle()))->fetchField();
          break;
        case 'feeds_source':
          if ($id = feeds_get_importer_id($this->bundle())) {
            $nid = db_query("SELECT fs.feed_nid FROM {relation} n JOIN {feeds_source} fs ON n.rid = fs.feed_nid WHERE fs.id = :id AND fs.source = :source", array(':id' => $id, ':source' => $value))->fetchField();
          }
          break;
      }
      if ($nid) {
        // Return with the first nid found.
        return $nid;
      }
    }
    return 0;
  }


  /**
   * Provides a list of bundle options for use in select lists.
   *
   * @return array
   *   A keyed array of bundle => label.
   */
  public function bundleOptions() {
    $options = array();

    $options = relation_get_types_options();
    return $options;

  }
}