node_access.inc

<?php


/**
 * @file
 * Plugin to provide access control based upon node type.
 */

/**
 * Plugins are described by creating a $plugin array which will be used
 * by the system that includes this file.
 */
$plugin = array(
    'title' => t("Node: accessible"),
    'description' => t('Control access with built in Drupal node access test.'),
    'callback' => 'ctools_node_access_ctools_access_check',
    'default' => array(
        'type' => 'view',
    ),
    'settings form' => 'ctools_node_access_ctools_access_settings',
    'settings form submit' => 'ctools_node_access_ctools_access_settings_submit',
    'summary' => 'ctools_node_access_ctools_access_summary',
    'required context' => array(
        new ctools_context_required(t('User'), 'user'),
        new ctools_context_required(t('Node'), 'node'),
    ),
);

/**
 * Settings form for the 'by node_access' access plugin.
 */
function ctools_node_access_ctools_access_settings($form, &$form_state, $conf) {
    $form['settings']['type'] = array(
        '#title' => t('Operation'),
        '#type' => 'radios',
        '#options' => array(
            'view' => t('View'),
            'update' => t('Update'),
            'delete' => t('Delete'),
            'create' => t('Create nodes of the same type'),
        ),
        '#description' => t('Using built in Drupal node access rules, determine if the user can perform the selected operation on the node.'),
        '#default_value' => $conf['type'],
    );
    return $form;
}

/**
 * Check for access.
 */
function ctools_node_access_ctools_access_check($conf, $context) {
    // As far as I know there should always be a context at this point, but this
    // is safe.
    list($user_context, $node_context) = $context;
    if (empty($node_context) || empty($node_context->data) || empty($node_context->data->type)) {
        return FALSE;
    }
    if (empty($user_context) || empty($user_context->data)) {
        return FALSE;
    }
    if ($conf['type'] == 'create') {
        return node_access('create', $node_context->data->type, $user_context->data);
    }
    else {
        return node_access($conf['type'], $node_context->data, $user_context->data);
    }
}

/**
 * Provide a summary description based upon the checked node_accesss.
 */
function ctools_node_access_ctools_access_summary($conf, $context) {
    list($user_context, $node_context) = $context;
    $replacement = array(
        '@user' => $user_context->identifier,
        '@node' => $node_context->identifier,
    );
    switch ($conf['type']) {
        case 'view':
            return t('@user can view @node.', $replacement);
        case 'update':
            return t('@user can edit @node.', $replacement);
        case 'delete':
            return t('@user can delete @node.', $replacement);
        case 'create':
            return t('@user can create nodes of the same type as @node.', $replacement);
    }
}