rid.inc

<?php


/**
 * @file
 * Plugin to provide an argument handler for a node revision id.
 */

/**
 * Plugins are described by creating a $plugin array which will be used
 * by the system that includes this file.
 */
$plugin = array(
    'title' => t("Revision: ID"),
    'keyword' => 'revision',
    'description' => t('Creates a node context from a revision ID argument.'),
    'context' => 'ctools_argument_rid_context',
    'placeholder form' => array(
        '#type' => 'textfield',
        '#description' => t('Enter the revision ID of a node for this argument'),
    ),
);

/**
 * Discover if this argument gives us the node we crave.
 */
function ctools_argument_rid_context($arg = NULL, $conf = NULL, $empty = FALSE) {
    // If unset it wants a generic, unfilled context.
    if ($empty) {
        return ctools_context_create_empty('node');
    }
    // We can accept either a node object or a pure nid.
    if (is_object($arg)) {
        return ctools_context_create('node', $arg);
    }
    if (!is_numeric($arg)) {
        return FALSE;
    }
    $nid = db_query('SELECT nid FROM {node_revision} WHERE vid = :vid', array(
        ':vid' => $arg,
    ))->fetchField();
    $node = node_load($nid, $arg);
    if (!$node) {
        return FALSE;
    }
    return ctools_context_create('node', $node);
}