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<?php
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/**
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* @file
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* Definition of views_plugin_style_rss.
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*/
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/**
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* Default style plugin to render an RSS feed.
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*
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* @ingroup views_style_plugins
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*/
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class views_plugin_style_rss extends views_plugin_style {
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/**
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*
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*/
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public function attach_to($display_id, $path, $title) {
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$display = $this->view->display[$display_id]->handler;
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$url_options = array();
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$input = $this->view->get_exposed_input();
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if ($input) {
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$url_options['query'] = $input;
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}
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$url_options['absolute'] = TRUE;
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$url = url($this->view->get_url(NULL, $path), $url_options);
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if ($display->has_path()) {
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if (empty($this->preview)) {
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drupal_add_feed($url, $title);
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}
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}
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else {
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if (empty($this->view->feed_icon)) {
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$this->view->feed_icon = '';
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}
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$this->view->feed_icon .= theme('feed_icon', array('url' => $url, 'title' => $title));
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drupal_add_html_head_link(array(
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'rel' => 'alternate',
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'type' => 'application/rss+xml',
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'title' => $title,
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'href' => $url,
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));
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function option_definition() {
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$options = parent::option_definition();
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$options['description'] = array('default' => '', 'translatable' => TRUE);
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return $options;
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}
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/**
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* {@inheritdoc}
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*/
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public function options_form(&$form, &$form_state) {
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parent::options_form($form, $form_state);
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$form['description'] = array(
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'#type' => 'textfield',
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'#title' => t('RSS description'),
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'#default_value' => $this->options['description'],
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'#description' => t('This will appear in the RSS feed itself.'),
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'#maxlength' => 1024,
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);
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}
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/**
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* Return an array of additional XHTML elements to add to the channel.
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*
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* @return
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* An array that can be passed to format_xml_elements().
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*/
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public function get_channel_elements() {
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return array();
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}
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/**
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* Return an atom:link XHTML element to add to the channel to comply with
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* the RSS 2.0 specification.
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*
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* @see http://validator.w3.org/feed/docs/warning/MissingAtomSelfLink.html
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*
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* @return
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* An array that can be passed to format_xml_elements().
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*/
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public function get_channel_elements_atom_link() {
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$url_options = array('absolute' => TRUE);
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$input = $this->view->get_exposed_input();
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if ($input) {
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$url_options['query'] = $input;
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}
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$url = url($this->view->get_url(), $url_options);
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return array(
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array(
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'namespace' => array('xmlns:atom' => 'http://www.w3.org/2005/Atom'),
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'key' => 'atom:link',
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'attributes' => array(
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'href' => $url,
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'rel' => 'self',
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'type' => 'application/rss+xml',
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),
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),
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);
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}
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/**
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* Get RSS feed description.
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*
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* @return string
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* The string containing the description with the tokens replaced.
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*/
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public function get_description() {
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$description = $this->options['description'];
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// Allow substitutions from the first row.
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$description = $this->tokenize_value($description, 0);
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return $description;
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}
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/**
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* {@inheritdoc}
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*/
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public function render() {
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if (empty($this->row_plugin)) {
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vpr('views_plugin_style_default: Missing row plugin');
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return;
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}
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$rows = '';
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// This will be filled in by the row plugin and is used later on in the
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// theming output.
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$this->namespaces = array('xmlns:dc' => 'http://purl.org/dc/elements/1.1/');
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// Fetch any additional elements for the channel and merge in their
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// namespaces.
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$this->channel_elements = array_merge(
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$this->get_channel_elements(),
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$this->get_channel_elements_atom_link()
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);
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foreach ($this->channel_elements as $element) {
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if (isset($element['namespace'])) {
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$this->namespaces = array_merge($this->namespaces, $element['namespace']);
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}
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}
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foreach ($this->view->result as $row_index => $row) {
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$this->view->row_index = $row_index;
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$rows .= $this->row_plugin->render($row);
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}
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$output = theme($this->theme_functions(),
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array(
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'view' => $this->view,
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'options' => $this->options,
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'rows' => $rows,
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));
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unset($this->view->row_index);
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return $output;
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}
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}
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