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<?php
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// $Id: draggableviews.inc,v 1.7.2.1 2008/09/21 21:17:33 sevi Exp $
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/**
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* @file
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* Draggableviews processing functions.
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*/
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include_once('draggableviews_theme.inc');
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/**
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* Build the form
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*/
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function draggableviews_view_draggabletable_form($form_state, $view) {
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$form['submit'] = array(
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'#type' => 'submit',
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'#value' => t('Save'),
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);
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return $form;
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}
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/**
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* Implementing hook_submit
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*/
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function draggableviews_view_draggabletable_form_submit($vars) {
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// check permissions
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if (!user_access('Allow Reordering')) {
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drupal_set_message(t('You are not allowed to reorder nodes.'), 'error');
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return;
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}
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// gather all needed information
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$view = $vars['#parameters'][2]->view;
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$results = $view->result;
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// get input
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$input = $vars['submit']['#post'];
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$info = _draggableviews_info($view);
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if (!isset($info['order'])) return;
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// loop through all resulting nodes
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foreach ($results as $row) {
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if (isset($info['order']['fields'])) {
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$info['input'][$row->nid]['order'][] = $input[$info['order']['fields'][0]['field_name'] .'_'. $row->nid];
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}
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if (isset($info['hierarchy'])) {
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$info['input'][$row->nid]['parent'] = $input[$info['hierarchy']['field']['field_name'] .'_'. $row->nid];
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}
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}
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// build hierarchy
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_draggableviews_build_hierarchy($info);
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// save structure
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_draggableviews_save_hierarchy($info);
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if (isset($info['hierarchy'])) {
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// save expanded/collapsed state
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global $user;
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foreach ($vars['submit']['#post'] AS $key => $val) {
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if (ereg('draggableviews_collapsed_', $key)) {
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$parent_nid = substr($key, 25);
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db_query("DELETE FROM {draggableviews_collapsed}
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WHERE uid=%d AND parent_nid=%d",
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$user->uid, $parent_nid);
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db_query("INSERT INTO {draggableviews_collapsed}
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(uid, parent_nid, collapsed) VALUES (%d, %d, %d)",
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$user->uid, $parent_nid, $val);
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}
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}
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}
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}
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/**
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* Collect all known information in a handy array
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*
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* @param $view
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* The views object
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*
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* @return
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* An structured array containt the extracted draggableviews settings
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* and additional field information.
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* array(
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* 'order' => array(
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* 'fields' => array(
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* 0 => array(
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* 'field_name' => field_name
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* 'real_field_name' => real_field_name,
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* 'field_alias' => field_alias
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* 'field_type' => field_type,
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* 'minimum_value' => minimum
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* ),
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* ..
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* ),
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* 'visible' => True/False
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* ),
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* 'hierarchy' => array(
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* 'field' => array(
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* 'field_name' => field_name
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* 'real_field_name' => real_field_name,
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* 'field_alias' => field_alias
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* 'field_type' => field_type,
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* ),
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* 'visible' => True/False
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* ),
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*
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* 'nodes' => array(
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* nid1 => array(
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* field_name1 => value
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* field_name2 => value
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* ..
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* ),
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* ..
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* ),
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* );
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*/
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function _draggableviews_info(&$view, $prepare_results = TRUE) {
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$options = &$view->display['default']->display_options['style_options'];
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$fields = &$view->field;
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$results = &$view->result;
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// build information array
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$info = array();
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if (isset($options['tabledrag_order'])) {
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foreach ($options['tabledrag_order'] as $field) {
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$info['order']['fields'][] = array(
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'handler' => _draggableviews_init_handler($field, $view),
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'field_name' => $field['field'],
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'field_alias' => $fields[$field['field']]->field_alias,
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);
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}
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$info['order']['visible'] = strcmp($options['tabledrag_order_visible']['visible'], 'visible') == 0 ? TRUE : FALSE;
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$info['order']['minimum_value'] = $info['order']['fields'][0]['handler']->get_minimum_value();
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if (count($info['order']['fields']) >= 2 && $options['tabledrag_hierarchy']['field'] != 'none') {
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$info['hierarchy'] = array(
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'field' => array(
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'handler' => _draggableviews_init_handler($options['tabledrag_hierarchy'], $view),
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'field_name' => $options['tabledrag_hierarchy']['field'],
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'field_alias' => $fields[$options['tabledrag_hierarchy']['field']]->field_alias,
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),
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'visible' => strcmp($options['tabledrag_hierarchy_visible']['visible'], 'visible') == 0 ? TRUE : FALSE,
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);
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}
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}
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if (isset($options['tabledrag_types'])) {
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foreach ($options['tabledrag_types'] as $type) {
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$info['types'][$type['node_type']] = $type['type'];
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}
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}
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if ($info['hierarchy']) {
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$info['expand_links'] = array(
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'show' => strcmp($options['tabledrag_expand']['expand_links'], 'expand_links') == 0 ? TRUE : FALSE,
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'default_collapsed' => strcmp($options['tabledrag_expand']['collapsed'], 'collapsed') == 0 ? TRUE : FALSE,
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);
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}
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$info['nodes'] = array();
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if ($options['tabledrag_order'] && $prepare_results) {
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// loop through all resulting nodes
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foreach ($results as $row) {
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foreach ($info['order']['fields'] as $field) {
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$info['nodes'][$row->nid]['order'][] = $row->{$field['field_alias']};
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}
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if (isset($info['hierarchy'])) {
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$info['nodes'][$row->nid]['parent'] = $row->{$info['hierarchy']['field']['field_alias']};
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}
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}
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}
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$gaga=$info;
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$gaga['order']['fields'][0]['handler']=array();
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$gaga['order']['fields'][1]['handler']=array();
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$gaga['hierarchy']['field']['handler']=array();
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//drupal_set_message("<pre>".print_r($gaga, true)."</pre>");
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return $info;
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}
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/**
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* Get instance from handler
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*
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* @param field
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* The field options specified in the style plugin
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* @param view
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* The view object
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*
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* @return
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* An instance of the handler
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*/
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function _draggableviews_init_handler($field, &$view) {
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//drupal_set_message("<pre>".print_r(draggableviews_discover_handlers(), true)."</pre>");
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$handler_info = draggableviews_discover_handlers($field['handler']);
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require_once($handler_info['path'] .'/'. $handler_info['file']);
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$handler = new $handler_info['handler'];
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$handler->init($field['field'], $view);
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return $handler;
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}
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/**
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* Build hierarchy
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*
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* This function also handles broken structures
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*
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* @param info
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* The structured information array
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*/
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function _draggableviews_build_hierarchy(&$info) {
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$nodes = &$info['nodes'];
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$input = &$info['input'];
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foreach ($nodes as $nid => $prop) {
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// get depth
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if (($depth = _draggableviews_get_hierarchy_depth($nid, $input, $info)) === FALSE) {
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// Error! The hierarchy structure is broken and could
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// look like the following: (we're currently processing X)
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// A
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// --X
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// --D
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//
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// The next steps:
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// 1) bring it down to the root level
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// 2) Set order fields to the minimum
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$nodes[$nid]['parent'] = 0;
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// We gracefully sidestep the order-loop
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$depth = -1;
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drupal_set_message("Draggableviews: An error was detected. The structure has been repaired.");
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}
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// Let's take a look at the following expample, to understand
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// what is beeing done.
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//
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// A
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// --B
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// --C
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// --X
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// --D
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// E
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// Imagine we're currently processing X:
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//
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// We know that X is in depth=3, so we save the received
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// weight value in the 3rd order field of node X.
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//
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// The 2nd order field must inherit the received weight of
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// node C (the next parent). And the 1st order field must
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// inherit the received weight of node A (the parent of C).
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//
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// When we finally order the view by weight1, weight2, weight3 then
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// weight1 and weight2 from node X will always equal with
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// those from node A and B, and weight3 defines the order of the 3rd level.
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$temp_nid = $nid;
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for ($i = $depth; $i >= 0; $i--) {
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// we're operating top-down, so we determine the parents nid by the way
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$nodes[$nid]['order'][$i] = $input[$temp_nid]['order'][0];
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if (isset($info['hierarchy']) && $i > 0) {
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if (!($temp_nid = $input[$temp_nid]['parent'])) {
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// this line should never be reached assumed the depth
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// was calculated correctly.
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drupal_set_message(t('Undefined State called in draggableviews_build_hierarchy(..)'), 'error');
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break;
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}
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}
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}
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if (isset($info['hierarchy']) && $depth > -1) {
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// Simply set the parent value
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$nodes[$nid]['parent'] = $input[$nid]['parent'];
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}
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// Now set all unused weights to a minimum value. Otherwise
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// it could happen that a child appears above its parent.
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// The ? can be anything, unfortunately also > 5
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//
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// --A (3,5)
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// B (3,?)
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//
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// To guaranteer that the ? is always the lowest, we choose
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// the minimum.
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// Due to this it's recommended that all order fields have
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// the same minimum value!
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$depth = ($depth == -1) ? 0 : $depth;
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for ($i = $depth + 1; $i < count($info['order']['fields']); $i++) {
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$info['nodes'][$nid]['order'][$i] = $info['order']['fields'][$i]['handler']->get_minimum_value();
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}
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}
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}
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/**
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* Rebuild hierarchy
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*
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* This function is called when the structure is broken
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*
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* @param info
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* The structures information array
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*/
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function _draggableviews_rebuild_hierarchy(&$info) {
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drupal_set_message("Draggableviews: Rebuilding structure..");
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$nodes = &$info['nodes'];
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$info['input'] = array();
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$input = &$info['input'];
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// Build an input-array to simulate the form data we would receive on submit
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// loop through all nodes
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foreach ($nodes as $nid => $prop) {
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$depth = $prop['depth'] ? $prop['depth'] : 0;
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// use order weight of the hierarchy level the field is situated in
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$input[$nid][0] = $prop['order'][$depth];
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$input[$nid]['order'][0] = $prop['order'][$depth];
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if (isset($info['hierarchy'])) {
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// set parent
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$input[$nid]['parent'] = $prop['parent'];
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}
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}
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// build hierarchy
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_draggableviews_build_hierarchy($info);
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// save hierarchy
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_draggableviews_save_hierarchy($info);
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// redirect here
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// @todo
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drupal_set_message(t('Draggableviews: Refresh required (..will redirect automatically after testing)'), 'error');
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}
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/**
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* Detect and repair order collisions
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*
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* @return
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* TRUE if no collision detected
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*/
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function _draggableviews_detect_order_collisions(&$info) {
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$nodes = &$info['nodes'];
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$collision = FALSE;
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// Detect order collisions
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// Check for the following:
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// 1) The minimum value should not be used as it
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// should be possible for new nodes to default on top
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// without order collisions
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// 2) @todo The last value should not be used...
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// 3) An order value should only be used once per depth/parent
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// array(
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// parent => array(order1, ..),
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// ..
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// )
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$order = array();
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$min_value = $info['order']['minimum_value'];
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// loop through all nodes
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foreach ($nodes as $nid => $prop) {
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if (isset($info['hierarchy'])) {
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$parent = $prop['parent'];
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// if no parent set use 0
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if (!isset($parent)) $parent = 0;
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}
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else {
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$parent = 0;
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}
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$order_field_value = &$nodes[$nid]['order'][$prop['depth']];
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$begin_search = TRUE;
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// make sure that the minimum value cannot be used
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if (!is_array($order[$parent])) $order[$parent] = array($min_value);
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// first try to keep current value
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$tmp_order = $order_field_value;
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while (is_numeric(array_search($tmp_order, $order[$parent]))) {
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// if there already exists an order value for this depth/parent
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// we have to find another one.
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// Try to find a free order:
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if ($begin_search == TRUE) {
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$tmp_order = $min_value + 1;
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$begin_search = FALSE;
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}
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else {
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$tmp_order++;
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}
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$collision = TRUE;
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}
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$order[$parent] = array_merge(array($tmp_order), $order[$parent]);
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$order_field_value = $tmp_order;
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}
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return !$collision;
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}
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/**
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| 432 |
* Set values and save nodes
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| 433 |
*
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| 434 |
* @param $info
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| 435 |
* The structured information array
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*/
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function _draggableviews_save_hierarchy($info) {
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// loop through all nodes
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foreach ($info['nodes'] as $nid => $prop) {
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if (isset($info['hierarchy'])) {
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$value = $prop['parent'];
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$handler = $info['hierarchy']['field']['handler'];
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$handler->save($nid, $value);
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}
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for ($i = 0; $i < count($info['order']['fields']); $i++) {
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// loop through all order fields
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$value = $prop['order'][$i];
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$handler = $info['order']['fields'][$i]['handler'];
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$handler->save($nid, $value);
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}
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}
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}
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/**
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| 459 |
* Check order settings
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| 460 |
*
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| 461 |
*/
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function _draggableviews_check_order($nid, &$info) {
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$nodes = &$info['nodes'];
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$temp_nid = $nid;
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for ($i = $nodes[$nid]['depth']; $i >= 0; $i--) {
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// we're operating top-down, so we determine the parents nid by the way
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if ($nodes[$nid]['order'][$i] != $nodes[$temp_nid]['order'][$i]) {
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return FALSE;
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}
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| 474 |
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| 475 |
if (isset($info['hierarchy']) && $i > 0) {
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| 476 |
if (!($temp_nid = $nodes[$temp_nid]['parent'])) {
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| 477 |
// this line should never be reached assumed the depth
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| 478 |
// was calculated correctly.
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| 479 |
drupal_set_message(t('Undefined State called in draggableviews_build_hierarchy(..)'), 'error');
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return FALSE;
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}
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| 482 |
}
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| 483 |
}
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return TRUE;
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| 486 |
}
|
| 487 |
|
| 488 |
/**
|
| 489 |
* Calculate depth of all nodes
|
| 490 |
*
|
| 491 |
* @param $info
|
| 492 |
* The structured information array
|
| 493 |
*/
|
| 494 |
function _draggableviews_calculate_depths(&$info) {
|
| 495 |
|
| 496 |
$error = FALSE;
|
| 497 |
|
| 498 |
// loop through all rows the view returns
|
| 499 |
foreach ($info['nodes'] as $nid => $prop) {
|
| 500 |
|
| 501 |
// determine hierarchy depth of current row
|
| 502 |
$info['nodes'][$nid]['depth'] = _draggableviews_get_hierarchy_depth($nid, $info['nodes'], $info);
|
| 503 |
|
| 504 |
if ($info['nodes'][$nid]['depth'] === FALSE) $error = TRUE;
|
| 505 |
}
|
| 506 |
|
| 507 |
return !$error;
|
| 508 |
}
|
| 509 |
|
| 510 |
/**
|
| 511 |
* Get Hierarchy depth
|
| 512 |
*
|
| 513 |
* This function detects cycles,
|
| 514 |
* broken hierarchy structures
|
| 515 |
* and wrong weight settings
|
| 516 |
*
|
| 517 |
* @param $node
|
| 518 |
* The node from wich we want to know the depth
|
| 519 |
* @param $info
|
| 520 |
* The structured information array
|
| 521 |
* return
|
| 522 |
* The hierarchy depth,
|
| 523 |
* on error FALSE.
|
| 524 |
*/
|
| 525 |
function _draggableviews_get_hierarchy_depth($nid, &$nodes, &$info) {
|
| 526 |
|
| 527 |
if (!isset($info['hierarchy'])) return 0;
|
| 528 |
|
| 529 |
$depth = 0;
|
| 530 |
$error = FALSE;
|
| 531 |
$temp_nid = $nid;
|
| 532 |
$used_nids = array();
|
| 533 |
$used_nids[] = $temp_nid;
|
| 534 |
|
| 535 |
while (!($error = !isset($nodes[$temp_nid])) && ($temp_nid = $nodes[$temp_nid]['parent']) > 0) {
|
| 536 |
|
| 537 |
// In order to detect cycles we use an array,
|
| 538 |
// where all used node ids are saved in. If any node id
|
| 539 |
// occurs twice -> return FALSE
|
| 540 |
$cycle_found = array_search($temp_nid, $used_nids);
|
| 541 |
|
| 542 |
if (isset($cycle_found) && $cycle_found !== FALSE) {
|
| 543 |
drupal_set_message(t("Draggableviews: A cycle was found."));
|
| 544 |
return FALSE;
|
| 545 |
}
|
| 546 |
|
| 547 |
$used_nids[] = $temp_nid;
|
| 548 |
$depth++;
|
| 549 |
}
|
| 550 |
|
| 551 |
if ($error) {
|
| 552 |
// If loop breaked caused by an error
|
| 553 |
return FALSE;
|
| 554 |
}
|
| 555 |
|
| 556 |
return $depth;
|
| 557 |
}
|
| 558 |
|
| 559 |
/*
|
| 560 |
* filter handlers by type
|
| 561 |
*
|
| 562 |
* @param $type
|
| 563 |
* the field type
|
| 564 |
* @param $fields
|
| 565 |
* the fields array
|
| 566 |
* return
|
| 567 |
* the available fields
|
| 568 |
*/
|
| 569 |
function _draggableviews_filter_fields($types = array(''), $handlers) {
|
| 570 |
|
| 571 |
$available_fields = array();
|
| 572 |
|
| 573 |
foreach ($handlers as $field => $handler) {
|
| 574 |
$available = TRUE;
|
| 575 |
// search given type in content-field-type
|
| 576 |
if (true) {
|
| 577 |
/*if (empty($types)) {
|
| 578 |
$available = TRUE;
|
| 579 |
}
|
| 580 |
else {
|
| 581 |
foreach ($types AS $type) {
|
| 582 |
if (ereg($type, $handler->content_field['type'])) {
|
| 583 |
$available = TRUE;
|
| 584 |
break;
|
| 585 |
}
|
| 586 |
}
|
| 587 |
}*/
|
| 588 |
|
| 589 |
if ($available) {
|
| 590 |
if ($label = $handler->label()) {
|
| 591 |
$available_fields[$field] = $label;
|
| 592 |
}
|
| 593 |
else {
|
| 594 |
$available_fields[$field] = $handler->ui_name();
|
| 595 |
}
|
| 596 |
}
|
| 597 |
}
|
| 598 |
}
|
| 599 |
return $available_fields;
|
| 600 |
}
|
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