views_plugin_row_node_rss.inc

<?php


/**
 * @file
 * Definition of views_plugin_row_node_rss.
 */

/**
 * Plugin which performs a node_view on the resulting object
 * and formats it as an RSS item.
 */
class views_plugin_row_node_rss extends views_plugin_row {
    
    /**
     * Basic properties that let the row style follow relationships.
     */
    public $base_table = 'node';
    
    /**
     *
     */
    public $base_field = 'nid';
    
    /**
     * Stores the nodes loaded with pre_render.
     */
    public $nodes = array();
    
    /**
     * {@inheritdoc}
     */
    public 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.
     */
    public function init(&$view, &$display, $options = NULL) {
        parent::init($view, $display, $options);
        if ($this->options['item_length'] == 'fulltext') {
            $this->options['item_length'] = 'full';
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public 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.
     */
    public function options_form_summary_options() {
        $entity_info = entity_get_info('node');
        $options = array();
        if (!empty($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;
    }
    
    /**
     * {@inheritdoc}
     */
    public function summary_title() {
        $options = $this->options_form_summary_options();
        return check_plain($options[$this->options['item_length']]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function pre_render($values) {
        $nids = array();
        foreach ($values as $row) {
            $nids[] = $row->{$this->field_alias};
        }
        if (!empty($nids)) {
            $this->nodes = node_load_multiple($nids);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function render($row) {
        // For the most part; This code is taken from node_feed() in node.module.
        global $base_url;
        $nid = $row->{$this->field_alias};
        if (!is_numeric($nid)) {
            return;
        }
        $display_mode = $this->options['item_length'];
        if ($display_mode == 'default') {
            $display_mode = variable_get('feed_item_length', 'teaser');
        }
        // Load the specified node.
        $node = $this->nodes[$nid];
        if (empty($node)) {
            return;
        }
        $item_text = '';
        $uri = entity_uri('node', $node);
        $node->link = url($uri['path'], $uri['options'] + array(
            'absolute' => TRUE,
        ));
        $node->rss_namespaces = array();
        $node->rss_elements = array(
            array(
                'key' => 'pubDate',
                'value' => gmdate('r', $node->created),
            ),
            array(
                'key' => 'dc:creator',
                'value' => format_username($node),
            ),
            array(
                'key' => 'guid',
                'value' => $node->nid . ' at ' . $base_url,
                'attributes' => array(
                    'isPermaLink' => 'false',
                ),
            ),
        );
        // The node gets built and modules add to or modify $node->rss_elements
        // and $node->rss_namespaces.
        $build_mode = $display_mode;
        $build = node_view($node, $build_mode);
        unset($build['#theme']);
        if (!empty($node->rss_namespaces)) {
            $this->view->style_plugin->namespaces = array_merge($this->view->style_plugin->namespaces, $node->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 node 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 = $node->title;
        $item->link = $node->link;
        $item->elements = $node->rss_elements;
        $item->nid = $node->nid;
        return theme($this->theme_functions(), array(
            'view' => $this->view,
            'options' => $this->options,
            'row' => $item,
        ));
    }

}