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<?php
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// $Id$
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function composite_composite_node_api(&$reference, $op, $a3 = NULL, $a4 = NULL) {
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switch ($op) {
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// Derive additional fields
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case 'load':
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// Note: can't do a node_load here, otherwise, we run the chance of an infinite loop.
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list($unused, $reference['nid']) = explode('-', $reference['id'], 2);
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break;
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// Generate and insert an informative human-readable string into ['info']
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case 'info':
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$node = node_load($reference['nid']);
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$reference['info'] = check_plain($node->title);
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break;
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// Return a rendering of the reference item
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case 'view':
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$node = node_load($reference['nid']);
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if ($node->nid) {
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switch ($reference['data']['format']) {
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case 'title':
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$output = theme('composite_node_title', check_plain($node->title));
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break;
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case 'title-link':
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$output = theme('composite_node_title', l($node->title, 'node/' . $node->nid));
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break;
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case 'teaser':
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$output = node_view($node, TRUE, FALSE);
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break;
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case 'full':
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if (_composite_nodes_recursion_check($node)) {
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drupal_set_message(t('You have created an infinite loop. One node is displaying a second node which in turn displays the first node.'), 'error');
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$output = node_view($node, TRUE, FALSE);
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}
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else {
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$output = node_view($node, FALSE, FALSE);
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}
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break;
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}
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return $output;
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}
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break;
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// Return form elements for additional settings
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case 'settings':
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$form['format'] = array(
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'#title' => t('Display as'),
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'#type' => 'select',
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'#options' => array(
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'title' => t('Title'),
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'title-link' => t('Title (link)'),
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'teaser' => t('Teaser'),
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'full' => t('Full node'),
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),
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'#default_value' => $reference['data']['format'] ? $reference['data']['format'] : 'teaser',
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);
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return $form;
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break;
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}
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}
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function composite_composite_node_access($op, $node) {
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// Only show nodes tab if referenceable types or a view has been configured
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$types = variable_get('composite_referenceable_types_' . $node->type, array());
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$view_name = variable_get('composite_advanced_view_' . $node->type, '--');
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$access = FALSE;
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if ($types || $view_name != '--')
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$access = node_access($op, $node);
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return $access;
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}
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/**
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* Generates and returns a keyed array of potential composite references
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* so composite.module can create a meaningful local task.
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*/
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function composite_composite_node_potentials($node) {
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$node_list = variable_get('composite_advanced_view_' . $node->type, '--') == '--' ? _composite_nodes_form_get_potentials_standard($node) : _composite_nodes_form_get_potentials_views($node);
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foreach ($node_list as $nid => $v) {
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$options['node-' . $nid] = $v->title;
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}
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return $options;
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}
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function _composite_nodes_form_get_potentials_standard($node) {
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$types = variable_get('composite_referenceable_types_' . $node->type, array());
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foreach ($types as $k => $type) {
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$types[$k] = "'". $types[$k] ."'";
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}
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$list = array();
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$result = db_query("SELECT nid, title FROM {node} WHERE type IN (". implode(', ', $types) . ") ORDER BY title, type, nid");
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while ($object = db_fetch_object($result)) {
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$list[$object->nid] = $object;
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}
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return $list;
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}
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function _composite_nodes_form_get_potentials_views($node) {
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$view_name = variable_get('composite_advanced_view_' . $node->type, '--');
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if (module_exists('views') && $view_name != '--' && $view = views_get_view($view_name)) {
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$view_args = variable_get('composite_advanced_view_args_' . $node->type, '');
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$view->set_arguments($view_args ? explode(',', $view_args) : array());
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$result = $view->execute();
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$results = $view->result;
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// We rely on the view returning objects with ->nid and ->node_title.
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// Can we safely presume this will always be true?
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$list = array();
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foreach ($results as $object) {
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$object->title = $object->node_title;
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$list[$object->nid] = $object;
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}
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return $list;
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}
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else {
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return array();
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}
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}
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// Returns true if we there is an infinite loop.
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function _composite_nodes_recursion_check($node) {
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static $nodes = array();
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if (array_key_exists($node->nid, $nodes)) {
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return true;
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}
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else {
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$nodes[$node->nid] = $node->nid;
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return false;
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}
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}
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