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<?php
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// $Id: georss.module,v 1.9.2.4 2009/09/22 18:49:57 rsoden Exp $
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/**
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* @file
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* GeoRSS module to add geo data from CCK fields to the RSS feed
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*/
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/**
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* Implementation of hook_menu().
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*/
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function georss_menu() {
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$items = array();
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$items['admin/settings/georss'] = array(
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'title' => 'GeoRSS Settings',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('georss_settings_form'),
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'access callback' => 'user_access',
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'access arguments' => array('administer nodes'),
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'type' => MENU_NORMAL_ITEM,
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);
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return $items;
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}
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/**
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* Implementation of hook_theme().
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*/
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function georss_theme() {
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return array(
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'georss_point' => array(),
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);
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}
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/**
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* GeoRSS settings form
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*/
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function georss_settings_form(&$form_state) {
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$settings = variable_get('georss_forms', array());
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$fields = content_fields();
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$options = array();
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foreach ($fields as $field) {
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$options[$field['field_name']] = $field['widget']['label'];
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}
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if (empty($options)) {
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drupal_set_message(t('To use the module, first you need to !createfields on the desired content-type to store latitude and longitude data.', array('!createfields' => l('create CCK fields', 'admin/content/types'))), 'warning');
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}
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$form = array();
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$form['georss_forms'] = array(
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'#type' => 'fieldset',
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'#title' => t('Sources of Geo Data for RSS Feeds'),
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'#tree' => TRUE,
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);
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$form['georss_forms']['format'] = array(
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'#type' => 'select',
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'#title' => t('Format'),
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'#options' => array('simple' => t('GeoRSS-Simple'), 'gml' => t('GeoRSS-GML')),
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'#default_value' => isset($settings['format']) ? $settings['format'] : 'simple',
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);
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$form['georss_forms']['field_lat'] = array(
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'#type' => 'select',
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'#title' => t('Latitude'),
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'#options' => $options,
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'#default_value' => isset($settings['field_lat']) ? $settings['field_lat'] : '',
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);
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$form['georss_forms']['field_lon'] = array(
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'#type' => 'select',
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'#title' => t('Longitude'),
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'#options' => $options,
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'#default_value' => isset($settings['field_lon']) ? $settings['field_lon'] : '',
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);
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return system_settings_form($form);
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}
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/**
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* Implementation of hook_nodeapi().
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*/
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function georss_nodeapi($node, $op) {
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switch ($op) {
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case 'rss item':
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$georss_settings = variable_get('georss_forms', FALSE);
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if ($georss_settings !== FALSE) {
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if (isset($node->$georss_settings['field_lat']) && isset($node->$georss_settings['field_lon'])) {
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$lon = $node->$georss_settings['field_lon'];
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$lat = $node->$georss_settings['field_lat'];
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if (!is_null($node->$georss_settings['field_lon']) && !is_null($node->$georss_settings['field_lat'])) {
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$items[] = theme_georss_point($lat['0']['value'], $lon['0']['value'], $georss_settings['format']);
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}
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unset($node->content[$georss_settings['field_lon']]);
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unset($node->content[$georss_settings['field_lat']]);
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return $items;
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}
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}
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break;
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}
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}
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/**
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* Theme GeoRSS points
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*/
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function theme_georss_point($lat, $lon, $format) {
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$output = array();
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switch ($format) {
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case 'gml':
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$output['key'] = 'georss:where';
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$output['namespace'] = array(
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'xmlns:georss' => 'http://www.georss.org/georss',
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'xmlns:gml' => 'http://www.opengis.net/gml'
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);
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$output['value'] = array(
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'gml:Point' => array(
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'gml:pos' => "$lat $lon"
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),
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);
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break;
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case 'simple':
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$output['key'] = 'georss:point';
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$output['namespace'] = array('xmlns:georss' => 'http://www.georss.org/georss');
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$output['value'] = "$lat $lon";
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break;
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}
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return $output;
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}
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