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<?php

/**

 * @file

 * Class definition of FeedsNodeProcessor.

 */

/**

 * Creates nodes from feed items.

 */

class FeedsNodeProcessor extends FeedsProcessor {

  /**

   * Define entity type.

   */

  public function entityType() {

    return 'node';

  }

  /**

   * Implements parent::entityInfo().

   */

  protected function entityInfo() {

    $info = parent::entityInfo();

    $info['label plural'] = t('Nodes');

    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'];

    return $node;

  }

  /**

   * 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) {

    $node = parent::entityLoad($source, $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) {

    node_save($entity);

  }

  /**

   * Delete a series of nodes.

   */

  protected function entityDeleteMultiple($nids) {

    node_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']);

    $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() {

    $type = node_type_get_type($this->bundle());

    $targets = parent::getMappingTargets();

    if ($type && $type->has_title) {

      $targets['title'] = array(

        'name' => t('Title'),

        'description' => t('The title of the node.'),

        'optional_unique' => TRUE,

      );

    }

    $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.'),

    );

    $targets['promote'] = array(

      'name' => t('Promoted to front page'),

      'description' => t('Boolean value, whether or not node is promoted to front page. (1 = promoted, 0 = not promoted)'),

    );

    $targets['sticky'] = array(

      'name' => t('Sticky'),

      'description' => t('Boolean value, whether or not node is sticky at top of lists. (1 = sticky, 0 = not sticky)'),

    );

    // 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.'),

      );

    }

    // Include comment field if Comment module is enabled.

    if (module_exists('comment')) {

      $targets['comment'] = array(

        'name' => t('Comments'),

        'description' => t('Whether comments are allowed on this node: 0 = no, 1 = read only, 2 = read/write.'),

      );

    }

    // 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();

    $entity_type = $this->entityType();

    $bundle = $this->bundle();

    drupal_alter('feeds_processor_targets', $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 nid FROM {node} WHERE nid = :nid", array(':nid' => $value))->fetchField();

          break;

        case 'title':

          $nid = db_query("SELECT nid FROM {node} 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 {node} n JOIN {feeds_source} fs ON n.nid = 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;

  }

}