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<?php
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// $Id: add_n_reference.module,v 1.1 2006/07/27 14:06:20 tema Exp $
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/**
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* @file
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* Adds a buttons to create and reference new node with nodereference field
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* Note: Requires content.module, nodereference.module
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* and form_restore.module to fill in parent field and for ability of
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* multi-step chained nodes creation.
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*/
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/**
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* Implementation of hook_help().
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*/
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function add_n_reference_help($section) {
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switch ($section) {
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case 'admin/modules#description':
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return t('Creates and references new nodes with nodereference field.
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<em>Note: Requires content.module nodereference.module and form_restore.module</em>');
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}
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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 add_n_reference_form_alter($form_id, &$form) {
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if (isset($form['type']) && $form['type']['#value'] .'_node_form' == $form_id) {
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theme_add_style(drupal_get_path('module', 'add_n_reference') .'/add-n-reference.css');
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$fields = content_fields();
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foreach ($form as $key => $item) {
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$field_name = strstr($key, 'field_');
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if (isset($fields[$field_name]) && $fields[$field_name]['type'] == 'nodereference') {
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$field = content_fields($field_name, $form['type']['#value']);
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$form[$key]['#prefix'] = '<div class="add-n-reference">';
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$form[$key]['#suffix'] = "</div>\n";
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if ($field['widget']['type'] == 'nodereference_select') {
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$buttons = _add_buttons($form['type']['#value'], $field_name, count($item['nids']['#default_value']));
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if (!empty($buttons)) {
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$form[$key]['add_n_reference_buttons'] = $buttons + array(
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'#prefix' => '<div class="form-item field-select add-n-reference-buttons">',
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'#suffix' => "</div>\n",
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);
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}
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}
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else if ($field['widget']['type'] == 'nodereference_autocomplete') {
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foreach ($item as $delta => $field_item) {
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$buttons = _add_buttons($form['type']['#value'], $field_name, $delta);
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if (is_numeric($delta) && !empty($buttons)) {
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$form[$key][$delta]['add_n_reference_buttons'] = $buttons + array(
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'#prefix' => '<div class="form-item field-'
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. ($field['multiple'] ? 'multiple' : 'single')
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.' add-n-reference-buttons">',
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'#suffix' => "</div>\n",
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);
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}
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}
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}
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$form['#pre_render'] = array('_add_n_reference_pre_render');
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}
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}
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}
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}
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/**
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* Generates 'Add new...' button
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* for each allowed content type
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*/
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function _add_buttons($parent_type, $field_name, $delta) {
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$buttons = array();
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$all_types = node_get_types();
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$field = content_fields($field_name, $parent_type);
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foreach ($field['referenceable_types'] as $child_type => $value) {
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if (!empty($value) && user_access("create $child_type content")) {
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$buttons["add_$child_type"] = array(
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'#type' => 'button',
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'#name' => "op[add_n_reference][$parent_type][$field_name][$delta][$child_type]",
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'#value' => t('Add new') .' '. $all_types[$type],
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);
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}
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}
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return $buttons;
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}
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/**
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* Determines witch button is pressed
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*/
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function _disgress_params($op) {
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if (is_array($op) && isset($op['add_n_reference'])) {
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$op = $op['add_n_reference'];
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$parent_type = key($op);
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$field_name = key($op[$parent_type]);
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$delta = key($op[$parent_type][$field_name]);
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$child_type = key($op[$parent_type][$field_name][$delta]);
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$path = "node/add/$child_type";
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return compact('parent_type', 'field_name', 'delta', 'child_type', 'path');
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}
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else {
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return array();
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}
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}
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/**
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* Pre-render function
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*/
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function _add_n_reference_pre_render($form_id, &$form) {
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if (extract(_disgress_params($_POST['op'])) == 5) {
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if (isset($_SESSION['post_stack'])) {
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while (count($_SESSION['post_stack']) > 10) { // Stack limit
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array_shift($_SESSION['post_stack']);
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}
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}
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$_SESSION['post_stack'][$_REQUEST['q']] = $_POST;
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$_POST = ''; // Prevent form values validation that happened in some cases
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if (isset($_REQUEST['destination'])) {
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$_SESSION['post_stack'][$_REQUEST['q']]['destination'] = $_REQUEST['destination'];
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unset($_REQUEST['destination']); // Prevent destination inheritance
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}
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drupal_goto($path, 'destination='. $_REQUEST['q']);
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}
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}
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/**
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* Implementation of hook_nodeapi().
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*/
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function add_n_reference_nodeapi(&$node, $op) {
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if ($op == 'insert' && isset($_REQUEST['destination'])
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&& isset($_SESSION['post_stack']) && isset($_SESSION['post_stack'][$_REQUEST['destination']])
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&& extract(_disgress_params($_SESSION['post_stack'][$_REQUEST['destination']]['op'])) == 5) {
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$field = content_fields($field_name, $parent_type);
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if ($field['widget']['type'] == 'nodereference_select') {
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if ($field['multiple']) {
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$_SESSION['post_stack'][$_REQUEST['destination']]['edit'][$field_name]['nids'][] = $node->nid;
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}
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else {
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$_SESSION['post_stack'][$_REQUEST['destination']]['edit'][$field_name]['nids'] = $node->nid;
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}
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}
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else if ($field['widget']['type'] == 'nodereference_autocomplete') {
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$_SESSION['post_stack'][$_REQUEST['destination']]['edit'][$field_name][$delta]['node_name'] = $node->title;
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}
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}
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}
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