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<?php
function custom_breadcrumbs_menu($may_cache) {
$items = array();
if ($may_cache) {
$access = user_access('administer custom breadcrumbs');
$items[] = array(
'path' => 'admin/build/custom_breadcrumbs',
'title' => t('Custom breadcrumbs'),
'description' => t('Add custom breadcrumb trails for content types.'),
'callback' => 'custom_breadcrumbs_page',
'access' => $access,
);
$items[] = array(
'path' => 'admin/build/custom_breadcrumbs/add',
'title' => t('Add custom breadcrumb'),
'type' => MENU_CALLBACK,
'callback' => 'drupal_get_form',
'callback arguments' => array(
'custom_breadcrumbs_form',
),
'access' => $access,
);
$items[] = array(
'path' => 'admin/build/custom_breadcrumbs/edit',
'title' => t('Edit custom breadcrumb'),
'type' => MENU_CALLBACK,
'callback' => 'drupal_get_form',
'callback arguments' => array(
'custom_breadcrumbs_form',
),
'access' => $access,
);
}
return $items;
}
function custom_breadcrumbs_perm() {
return array(
'administer custom breadcrumbs',
'use php in custom breadcrumbs',
);
}
function custom_breadcrumbs_nodeapi($node, $op, $teaser, $page) {
if ($op == 'view' && !$teaser && $page) {
if ($breadcrumb = _custom_breadcrumbs_load_for_type($node)) {
$titles = preg_split("/[\n]+/", $breadcrumb->titles);
$paths = preg_split("/[\n]+/", $breadcrumb->paths);
$titles = module_exists('token') ? token_replace($titles, 'node', $node) : $titles;
$paths = module_exists('token') ? token_replace($paths, 'node', $node) : $paths;
$trail = array(
l(t('Home'), ''),
);
$location = array();
for ($i = 0; $i < count($titles); $i++) {
if ($title = trim($titles[$i])) {
$title = $title == '<none>' ? ' ' : decode_entities($title);
$path = trim($paths[$i]);
if (strlen($path) > 0 && $path != '<none>') {
$parsed = parse_url($path);
$trail[] = l($title, $parsed['path'], array(), $parsed['query']);
}
else {
$trail[] = check_plain($title);
}
$location[] = array(
'title' => $title,
'path' => drupal_get_normal_path($path),
);
}
}
drupal_set_breadcrumb($trail);
menu_set_location($location);
}
}
}
function custom_breadcrumbs_page() {
$breadcrumbs = _custom_breadcrumbs_load_all_breadcrumbs(TRUE);
$header = array(
t('node type'),
'',
);
$rows = array();
foreach ($breadcrumbs as $breadcrumb) {
$row = array();
$row[] = $breadcrumb->node_type . (!empty($breadcrumb->visibility_php) ? t(' with PHP snippet') : '');
$row[] = l(t('edit'), 'admin/build/custom_breadcrumbs/edit/' . $breadcrumb->bid);
$rows[] = $row;
}
if (count($rows) == 0) {
$rows[] = array(
array(
'data' => t('No custom breadcrumbs have been defined.'),
'colspan' => 2,
),
);
}
$rows[] = array(
array(
'data' => l(t('Add a new custom breadcrumb'), 'admin/build/custom_breadcrumbs/add'),
'colspan' => 2,
),
);
return theme('table', $header, $rows);
}
function custom_breadcrumbs_form() {
$bid = arg(4);
if (isset($bid)) {
$breadcrumb = _custom_breadcrumbs_load_breadcrumb($bid);
$form['bid'] = array(
'#type' => 'hidden',
'#value' => $bid,
);
}
$options = array();
foreach (node_get_types('names') as $type => $name) {
$options[$type] = $name;
}
$form['node_type'] = array(
'#type' => 'select',
'#title' => t('Node type'),
'#required' => TRUE,
'#options' => $options,
'#description' => t('The node type this custom breadcrumb trail will apply to.'),
'#default_value' => $bid ? $breadcrumb->node_type : NULL,
);
$form['visibility_php'] = array(
'#type' => 'textarea',
'#title' => t('Breadcrumb visibility'),
'#access' => user_access('use php in custom breadcrumbs'),
'#description' => t('Determine whether this breadcrumb should be displayed by using a snippet of PHP to return TRUE or FALSE. Note that this code has access to the $node variable, and can check its type or any other property.'),
'#default_value' => $bid ? $breadcrumb->visibility_php : '',
);
$form['titles'] = array(
'#type' => 'textarea',
'#title' => t('Titles'),
'#required' => TRUE,
'#description' => t('A list of titles for the breadcrumb links, one on each line.'),
'#default_value' => $bid ? $breadcrumb->titles : NULL,
);
$form['paths'] = array(
'#type' => 'textarea',
'#title' => t('Paths'),
'#required' => TRUE,
'#description' => t('A list of Drupal paths for the breadcrumb links, one on each line.'),
'#default_value' => $bid ? $breadcrumb->paths : NULL,
);
$form['help'] = array(
'#type' => 'fieldset',
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#title' => t('Placeholder tokens'),
'#description' => t("The following placeholder tokens can be used in both paths and titles. When used in a path or title, they will be replaced with the appropriate values."),
);
if (module_exists('token')) {
$form['help']['tokens'] = array(
'#value' => theme('token_help', 'node'),
);
}
else {
$form['help']['#description'] = t("To use dynamic placeholder tokens in your breadcrumb trails (the ID or title of the current node, for example), download and install the <a href='@token'>Token module</a> from Drupal.org.", array(
'@token' => 'http://www.drupal.org/project/token',
));
$form['help']['#collapsible'] = FALSE;
$form['help']['#collapsed'] = FALSE;
}
$form['buttons']['submit'] = array(
'#type' => 'submit',
'#value' => t('Submit'),
);
if ($bid) {
$form['buttons']['delete'] = array(
'#type' => 'submit',
'#value' => t('Delete'),
);
}
return $form;
}
function custom_breadcrumbs_form_validate($form_id, $form_values) {
$path_count = count(explode("\n", $form_values['paths']));
$title_count = count(explode("\n", $form_values['titles']));
if ($title_count != $path_count) {
$error_field = $title_count > $path_count ? 'paths' : 'titles';
form_set_error($error_field, t('Every link path must have a matching title. There are !paths paths, and !titles titles.', array(
'!paths' => $path_count,
'!titles' => $title_count,
)));
}
}
function custom_breadcrumbs_form_submit($form_id, $form_values) {
if ($form_values['op'] == t('Delete')) {
_custom_breadcrumbs_delete_breadcrumb($form_values['bid']);
}
else {
$breadcrumb = (object) $form_values;
custom_breadcrumbs_save_breadcrumb($breadcrumb);
}
return 'admin/build/custom_breadcrumbs';
}
function _custom_breadcrumbs_load_breadcrumb($bid) {
$sql = 'SELECT * FROM {custom_breadcrumb} WHERE bid = %d';
$result = db_query($sql, $bid);
$breadcrumb = db_fetch_object($result);
return $breadcrumb;
}
function _custom_breadcrumbs_load_for_type($node) {
$sql = "SELECT * FROM {custom_breadcrumb} WHERE node_type = '%s'";
$result = db_query($sql, $node->type);
while ($breadcrumb = db_fetch_object($result)) {
if (!empty($breadcrumb->visibility_php)) {
ob_start();
$visibility = eval(trim($breadcrumb->visibility_php));
ob_end_clean();
if ($visibility == TRUE) {
return $breadcrumb;
}
}
else {
return $breadcrumb;
}
}
}
function _custom_breadcrumbs_load_all_breadcrumbs($refresh = FALSE) {
static $breadcrumbs;
if ($refresh || !isset($breadcrumbs)) {
$sql = 'SELECT * FROM {custom_breadcrumb} ORDER BY node_type';
$result = db_query($sql);
$breadcrumbs = array();
while ($breadcrumb = db_fetch_object($result)) {
$breadcrumbs[] = $breadcrumb;
}
}
return $breadcrumbs;
}
function custom_breadcrumbs_save_breadcrumb($breadcrumb = NULL) {
if (is_array($breadcrumb->paths)) {
$breadcrumb->paths = implode("\n", $breadcrumb->paths);
}
if (is_array($breadcrumb->titles)) {
$breadcrumb->titles = implode("\n", $breadcrumb->titles);
}
if (isset($breadcrumb->bid)) {
$sql = "UPDATE {custom_breadcrumb} SET";
$sql .= " titles = '%s', paths = '%s', visibility_php = '%s', node_type = '%s'";
$sql .= " WHERE bid = %d";
db_query($sql, $breadcrumb->titles, $breadcrumb->paths, $breadcrumb->visibility_php, $breadcrumb->node_type, $breadcrumb->bid);
}
else {
$sql = "INSERT INTO {custom_breadcrumb}";
$sql .= " (titles, paths, visibility_php, node_type)";
$sql .= " VALUES ('%s', '%s', '%s', '%s')";
db_query($sql, $breadcrumb->titles, $breadcrumb->paths, $breadcrumb->visibility_php, $breadcrumb->node_type);
}
}
function _custom_breadcrumbs_delete_breadcrumb($bid) {
$sql = 'DELETE FROM {custom_breadcrumb} WHERE bid = %d';
db_query($sql, $bid);
}
