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<?php
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/**
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* @file
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* Plugin to provide access control based on whether a node belongs to a book.
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*/
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/**
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* Plugins are described by creating a $plugin array which will be used
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* by the system that includes this file.
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*/
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if (module_exists('book')) {
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$plugin = array(
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'title' => t("Book: node is in a book"),
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'description' => t('Control access based upon a node belonging to a book.'),
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'callback' => 'ctools_book_node_ctools_access_check',
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'default' => array('book' => array()),
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'settings form' => 'ctools_book_node_ctools_access_settings',
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'settings form submit' => 'ctools_book_node_ctools_access_settings_submit',
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'summary' => 'ctools_book_node_ctools_access_summary',
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'required context' => new ctools_context_required(t('Node'), 'node'),
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);
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}
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/**
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* Settings form for the 'by book_node' access plugin.
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*/
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function ctools_book_node_ctools_access_settings($form, &$form_state, $conf) {
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$options = array(
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'any' => t('In any book'),
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);
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$books = book_get_books();
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foreach ($books as $bid => $book) {
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$options[$bid] = $book['title'];
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}
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$form['settings']['book'] = array(
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'#title' => t('Book'),
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'#type' => 'checkboxes',
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'#options' => $options,
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'#description' => t('Pass only if the node belongs to one of the selected books'),
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'#default_value' => $conf['book'],
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'#required' => TRUE,
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);
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return $form;
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}
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/**
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* Check for access.
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*/
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function ctools_book_node_ctools_access_check($conf, $context) {
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// As far as I know there should always be a context at this point, but this
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// is safe.
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if (empty($context) || empty($context->data) || empty($context->data->book)) {
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return FALSE;
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}
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if ($conf['book']['any']) {
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return !empty($context->data->book);
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}
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foreach ($conf['book'] as $bid => $value) {
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if ($bid == 'any') {
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continue;
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}
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if ($value && ($bid == $context->data->book['bid'])) {
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return TRUE;
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}
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}
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return FALSE;
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}
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/**
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* Provide a summary description based upon the checked node_languages.
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*/
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function ctools_book_node_ctools_access_summary($conf, $context) {
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if ($conf['book']['any']) {
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return t('@identifier belongs to a book', array('@identifier' => $context->identifier));
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}
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$books = array();
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foreach ($conf['book'] as $bid => $value) {
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if ($value) {
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$node = node_load($bid);
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$books[] = $node->title;
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}
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}
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if (count($books) == 1) {
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return t('@identifier belongs to the book "@book"', array('@book' => $books[0], '@identifier' => $context->identifier));
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}
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return t('@identifier belongs in multiple books', array('@identifier' => $context->identifier));
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}
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