Club Drupal

<?php

/**

 * @file

 * Contains the file RSS row style plugin.

 */

/**

 * Plugin which performs a file_view on the resulting object

 * and formats it as an RSS item.

 */

class views_plugin_row_file_rss extends views_plugin_row {

  // Basic properties that let the row style follow relationships.

  var $base_table = 'file_managed';

  var $base_field = 'fid';

  // Stores the files loaded with pre_render.

  var $files = array();

  function option_definition() {

    $options = parent::option_definition();

    $options['item_length'] = array('default' => 'default');

    $options['links'] = array('default' => FALSE, 'bool' => TRUE);

    return $options;

  }

  /**

   * Override init function to convert fulltext view-mode to full.

   */

  function init(&$view, &$display, $options = NULL) {

    parent::init($view, $display, $options);

    if ($this->options['item_length'] == 'fulltext') {

      $this->options['item_length'] = 'full';

    }

  }

  function options_form(&$form, &$form_state) {

    parent::options_form($form, $form_state);

    $form['item_length'] = array(

      '#type' => 'select',

      '#title' => t('Display type'),

      '#options' => $this->options_form_summary_options(),

      '#default_value' => $this->options['item_length'],

    );

    $form['links'] = array(

      '#type' => 'checkbox',

      '#title' => t('Display links'),

      '#default_value' => $this->options['links'],

    );

  }

  /**

   * Return the main options, which are shown in the summary title.

   */

  function options_form_summary_options() {

    $entity_info = entity_get_info('file');

    $options = array();

    if (!empty($entity_info['view modes'])) {

      foreach ($entity_info['view modes'] as $mode => $settings) {

        $options[$mode] = $settings['label'];

      }

    }

    $options['title'] = t('Title only');

    $options['default'] = t('Use site default RSS settings');

    return $options;

  }

  function summary_title() {

    $options = $this->options_form_summary_options();

    return check_plain($options[$this->options['item_length']]);

  }

  function pre_render($values) {

    $fids = array();

    foreach ($values as $row) {

      $fids[] = $row->{$this->field_alias};

    }

    if (!empty($fids)) {

      $this->files = file_load_multiple($fids);

    }

  }

  function render($row) {

    // For the most part, this code is taken from node_feed() in node.module

    global $base_url;

    $fid = $row->{$this->field_alias};

    if (!is_numeric($fid)) {

      return;

    }

    $display_mode = $this->options['item_length'];

    if ($display_mode == 'default') {

      $display_mode = variable_get('feed_item_length', 'teaser');

    }

    // Load the specified file:

    $file = $this->files[$fid];

    if (empty($file)) {

      return;

    }

    $item_text = '';

    $uri = entity_uri('file', $file);

    $user = user_load($file->uid);

    $file->link = url($uri['path'], $uri['options'] + array('absolute' => TRUE));

    $file->rss_namespaces = array();

    $file->rss_elements = array(

      array(

        'key' => 'pubDate',

        'value' => gmdate('r', $file->timestamp),

      ),

      array(

        'key' => 'dc:creator',

        'value' => $user->name,

      ),

      array(

        'key' => 'guid',

        'value' => $file->fid . ' at ' . $base_url,

        'attributes' => array('isPermaLink' => 'false'),

      ),

    );

    // The file gets built and modules add to or modify $file->rss_elements

    // and $file->rss_namespaces.

    $build_mode = $display_mode;

    $build = file_view($file, $build_mode);

    unset($build['#theme']);

    if (!empty($file->rss_namespaces)) {

      $this->view->style_plugin->namespaces = array_merge($this->view->style_plugin->namespaces, $file->rss_namespaces);

    }

    elseif (function_exists('rdf_get_namespaces')) {

      // Merge RDF namespaces in the XML namespaces in case they are used

      // further in the RSS content.

      $xml_rdf_namespaces = array();

      foreach (rdf_get_namespaces() as $prefix => $uri) {

        $xml_rdf_namespaces['xmlns:' . $prefix] = $uri;

      }

      $this->view->style_plugin->namespaces += $xml_rdf_namespaces;

    }

    // Hide the links if desired.

    if (!$this->options['links']) {

      hide($build['links']);

    }

    if ($display_mode != 'title') {

      // We render file contents and force links to be last.

      $build['links']['#weight'] = 1000;

      $item_text .= drupal_render($build);

    }

    $item = new stdClass();

    $item->description = $item_text;

    $item->title = $file->filename;

    $item->link = $file->link;

    $item->elements = $file->rss_elements;

    $item->fid = $file->fid;

    return theme($this->theme_functions(), array(

      'view' => $this->view,

      'options' => $this->options,

      'row' => $item

    ));

  }

}