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<?php
/**
* @file
* User page callbacks for the book module.
*/
/**
* Menu callback: Prints a listing of all books.
*
* @return string
* A HTML-formatted string with the listing of all books content.
*
* @see book_menu()
*/
function book_render() {
$book_list = array();
foreach (book_get_books() as $book) {
$book_list[] = l($book['title'], $book['href'], $book['options']);
}
return theme('item_list', array('items' => $book_list));
}
/**
* Menu callback; Generates representations of a book page and its children.
*
* The function delegates the generation of output to helper functions. The
* function name is derived by prepending 'book_export_' to the given output
* type. So, e.g., a type of 'html' results in a call to the function
* book_export_html().
*
* @param $type
* A string encoding the type of output requested. The following types are
* currently supported in book module:
* - html: Printer-friendly HTML.
* Other types may be supported in contributed modules.
* @param $nid
* An integer representing the node id (nid) of the node to export
*
* @return
* A string representing the node and its children in the book hierarchy in a
* format determined by the $type parameter.
*
* @see book_menu()
*/
function book_export($type, $nid) {
// Check that the node exists and that the current user has access to it.
$node = node_load($nid);
if (!$node) {
return MENU_NOT_FOUND;
}
if (!node_access('view', $node)) {
return MENU_ACCESS_DENIED;
}
$type = drupal_strtolower($type);
$export_function = 'book_export_' . $type;
if (function_exists($export_function)) {
print call_user_func($export_function, $nid);
}
else {
drupal_set_message(t('Unknown export format.'));
drupal_not_found();
}
}
/**
* Generates HTML for export when invoked by book_export().
*
* The given node is embedded to its absolute depth in a top level section. For
* example, a child node with depth 2 in the hierarchy is contained in
* (otherwise empty) <div> elements corresponding to depth 0 and depth 1.
* This is intended to support WYSIWYG output - e.g., level 3 sections always
* look like level 3 sections, no matter their depth relative to the node
* selected to be exported as printer-friendly HTML.
*
* @param $nid
* An integer representing the node id (nid) of the node to export.
*
* @return
* A string containing HTML representing the node and its children in
* the book hierarchy.
*/
function book_export_html($nid) {
if (user_access('access printer-friendly version')) {
$node = node_load($nid);
if (isset($node->book)) {
$tree = book_menu_subtree_data($node->book);
$contents = book_export_traverse($tree, 'book_node_export');
return theme('book_export_html', array('title' => $node->title, 'contents' => $contents, 'depth' => $node->book['depth']));
}
else {
drupal_not_found();
}
}
else {
drupal_access_denied();
}
}
/**
* Menu callback: Shows the outline form for a single node.
*
* @param $node
* The book node for which to show the outline.
*
* @return string
* A HTML-formatted string with the outline form for a single node.
*
* @see book_menu()
*/
function book_outline($node) {
drupal_set_title($node->title);
return drupal_get_form('book_outline_form', $node);
}
/**
* Form constructor for the book outline form.
*
* Allows handling of all book outline operations via the outline tab.
*
* @param $node
* The book node for which to show the outline.
*
* @see book_outline_form_submit()
* @see book_remove_button_submit()
* @ingroup forms
*/
function book_outline_form($form, &$form_state, $node) {
if (!isset($node->book)) {
// The node is not part of any book yet - set default options.
$node->book = _book_link_defaults($node->nid);
}
else {
$node->book['original_bid'] = $node->book['bid'];
}
// Find the depth limit for the parent select.
if (!isset($node->book['parent_depth_limit'])) {
$node->book['parent_depth_limit'] = _book_parent_depth_limit($node->book);
}
$form['#node'] = $node;
$form['#id'] = 'book-outline';
_book_add_form_elements($form, $form_state, $node);
$form['book']['#collapsible'] = FALSE;
$form['update'] = array(
'#type' => 'submit',
'#value' => $node->book['original_bid'] ? t('Update book outline') : t('Add to book outline'),
'#weight' => 15,
);
$form['remove'] = array(
'#type' => 'submit',
'#value' => t('Remove from book outline'),
'#access' => _book_node_is_removable($node),
'#weight' => 20,
'#submit' => array('book_remove_button_submit'),
);
return $form;
}
/**
* Form submission handler for book_outline_form().
*
* Redirects to removal confirmation form.
*
* @see book_outline_form_submit()
*/
function book_remove_button_submit($form, &$form_state) {
$form_state['redirect'] = 'node/' . $form['#node']->nid . '/outline/remove';
}
/**
* Form submission handler for book_outline_form().
*
* @see book_remove_button_submit()
*/
function book_outline_form_submit($form, &$form_state) {
$node = $form['#node'];
$form_state['redirect'] = "node/" . $node->nid;
$book_link = $form_state['values']['book'];
if (!$book_link['bid']) {
drupal_set_message(t('No changes were made'));
return;
}
$book_link['menu_name'] = book_menu_name($book_link['bid']);
$node->book = $book_link;
if (_book_update_outline($node)) {
if ($node->book['parent_mismatch']) {
// This will usually only happen when JS is disabled.
drupal_set_message(t('The post has been added to the selected book. You may now position it relative to other pages.'));
$form_state['redirect'] = "node/" . $node->nid . "/outline";
}
else {
drupal_set_message(t('The book outline has been updated.'));
}
}
else {
drupal_set_message(t('There was an error adding the post to the book.'), 'error');
}
}
/**
* Form constructor to confirm removal of a node from a book.
*
* @param $node
* The node to delete.
*
* @see book_remove_form_submit()
* @ingroup forms
*/
function book_remove_form($form, &$form_state, $node) {
$form['#node'] = $node;
$title = array('%title' => $node->title);
if ($node->book['has_children']) {
$description = t('%title has associated child pages, which will be relocated automatically to maintain their connection to the book. To recreate the hierarchy (as it was before removing this page), %title may be added again using the Outline tab, and each of its former child pages will need to be relocated manually.', $title);
}
else {
$description = t('%title may be added to hierarchy again using the Outline tab.', $title);
}
return confirm_form($form, t('Are you sure you want to remove %title from the book hierarchy?', $title), 'node/' . $node->nid, $description, t('Remove'));
}
/**
* Form submission handler for book_remove_form().
*/
function book_remove_form_submit($form, &$form_state) {
$node = $form['#node'];
if (_book_node_is_removable($node)) {
menu_link_delete($node->book['mlid']);
db_delete('book')
->condition('nid', $node->nid)
->execute();
drupal_set_message(t('The post has been removed from the book.'));
}
$form_state['redirect'] = 'node/' . $node->nid;
}