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<?php
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// $Id: nodeblock.module,v 1.10 2009/02/05 20:00:12 rz Exp $
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/**
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* @file
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* Enables use of specified node types as custom blocks.
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*/
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/**
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* Utility function to tell whether a type is enabled as a node block
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*/
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function nodeblock_type_enabled($type) {
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if (is_object($type)) {
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$type = $type->type;
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}
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return variable_get('nodeblock_'. $type, 0) ? TRUE : FALSE;
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}
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/**
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* Implementation of hook_form_alter().
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*/
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function nodeblock_form_alter(&$form, $form_state, $form_id) {
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// content type settings form
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if ($form_id == 'node_type_form' && isset($form['identity']['type'])) {
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$form['workflow']['nodeblock'] = array(
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'#type' => 'radios',
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'#title' => t('Available as block'),
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'#default_value' => variable_get('nodeblock_'. $form['#node_type']->type, 0),
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'#options' => array(0 => t('Disabled'), 1 => t('Enabled')),
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'#description' => t('Should these nodes be made available as blocks?'),
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);
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}
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// node add/edit form
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elseif (isset($form['type']) && isset($form['#node']) && $form['type']['#value'] .'_node_form' == $form_id) {
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$node = $form['#node'];
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// Add translation fallback field for nodeblock and translation enabled source nodes only
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if (nodeblock_type_enabled($node->type) && module_exists('translation') && translation_supported_type($node->type) && empty($node->translation_source)) {
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$form['nodeblock'] = array(
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'#type' => 'fieldset',
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'#title' => t('Block translation options'),
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'#tree' => true,
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);
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$form['nodeblock']['translation_fallback'] = array(
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'#type' => 'checkbox',
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'#title' => t('Enable translation fallback?'),
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'#description' => t('If checked, the source translation node will be used when a translation for the current language does not exist. If unchecked, the block will not be displayed if a matching translation does not exist.'),
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'#default_value' => $node->nodeblock_translation_fallback,
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);
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}
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}
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}
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/**
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* Implementation of hook_nodeapi().
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*/
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function nodeblock_nodeapi(&$node, $op, $teaser, $page) {
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// do nothing if not enabled
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if (!nodeblock_type_enabled($node)) {
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return;
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}
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switch ($op) {
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case 'load':
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$tnid = $node->tnid ? $node->tnid : $node->nid;
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return array('nodeblock_translation_fallback' => variable_get('nodeblock_translation_fallback_'. $tnid, 1));
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case 'insert':
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case 'update':
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drupal_set_message(t('The block you just created is now available on the <a href="!url">block configuration page</a>.', array('!url' => url('admin/build/block'))));
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// set the translation fallback variable if set.
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if (isset($node->nodeblock['translation_fallback'])) {
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$tnid = $node->tnid ? $node->tnid : $node->nid;
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variable_set('nodeblock_translation_fallback_'. $tnid, $node->nodeblock['translation_fallback']);
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}
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_block_rehash();
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break;
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case 'delete':
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_block_rehash();
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break;
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}
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}
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/**
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* Implementation of hook_block().
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*/
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function nodeblock_block($op = 'list', $delta = 0, $edit = array()) {
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$types = node_get_types();
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if ($op == 'list') {
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foreach ($types as $type) {
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if (nodeblock_type_enabled($type)) {
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// Fetch all nodes of this type, excluding translations.
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$result = db_query('SELECT nid, title FROM {node} WHERE type = "%s" AND status = 1 AND (nid = tnid OR tnid = 0)', $type->type);
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while ($node = db_fetch_object($result)) {
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$blocks[$node->nid] = array('info' => $node->title .' (nodeblock)');
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}
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}
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}
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return $blocks;
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}
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elseif ($op == 'view') {
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$node = node_load($delta);
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// if the node type is translatable, try to load the node with the appropriate
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// language from the translation set.
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if (module_exists('translation') && translation_supported_type($node->type)) {
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global $language;
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$translations = translation_node_get_translations($node->tnid);
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if ($translations[$language->language]) {
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$node = node_load($translations[$language->language]->nid);
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}
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elseif (!$node->nodeblock_translation_fallback) {
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// if no translation was found, and not using the fallback option
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// return nothing, so the block doesn't display.
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return;
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}
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// otherwise we just use the main node
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}
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// Set a flag so that themes have more context.
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$node->nodeblock = TRUE;
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$block['subject'] = $node->title;
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$block['content'] = node_view($node, FALSE, FALSE, TRUE);
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return $block;
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}
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}
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/**
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* Implementation of hook_link().
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*/
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function nodeblock_link($type, $node = NULL, $teaser = FALSE) {
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$links = array();
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if ($type == 'node' && nodeblock_type_enabled($node)) {
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if (node_access('update', $node)) {
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$links['nodeblock_edit'] = array(
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'title' => t('Edit'),
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'href' => 'node/'. $node->nid .'/edit',
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'query' => drupal_get_destination(),
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);
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}
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if (module_exists('translation') && _translation_tab_access($node)) {
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$links['nodeblock_translate'] = array(
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'title' => t('Translate'),
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'href' => 'node/'. $node->nid .'/translate',
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'query' => drupal_get_destination(),
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);
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}
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if (user_access('administer blocks')) {
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$links['nodeblock_configure'] = array(
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'title' => t('Configure'),
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'href' => 'admin/build/block/configure/nodeblock/'. $node->nid,
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'query' => drupal_get_destination(),
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);
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}
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}
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return $links;
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}
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/**
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* Implementation of hook_preprocess_node().
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*
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* Add node-nodeblock-default to the suggested theme files for all nodeblock
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* enabled nodes. Note that the template is "unshifted" onto the template files
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* array. This gives the template file a lower priority than any node-nodetype
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* templates, but a higher priority than a generic node.tpl.php.
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*/
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function nodeblock_preprocess_node(&$variables) {
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if ($variables['node']->nodeblock) {
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array_unshift($variables['template_files'], 'node-nodeblock-default');
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}
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}
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/**
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* Implementation of hook_theme_registry_alter().
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*
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* Add nodeblock path to the 'theme paths' for the 'node' hook. This allows us
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* to use node-nodeblock-default.tpl.php from the module directory. Note that
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* the path is "unshifted" onto the theme paths array. This puts the module path
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* before the modules/node path, but since neither of these modules implements
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* the same templates, there is not problem.
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*/
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function nodeblock_theme_registry_alter(&$registry) {
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array_unshift($registry['node']['theme paths'], drupal_get_path('module', 'nodeblock'));
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}
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