danielebarchiesi@0: <?php
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * @file relationships/term_parent.inc
danielebarchiesi@0:  * Plugin to provide an relationship handler for term parent.
danielebarchiesi@0:  */
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * Plugins are described by creating a $plugin array which will be used
danielebarchiesi@0:  * by the system that includes this file.
danielebarchiesi@0:  */
danielebarchiesi@0: $plugin = array(
danielebarchiesi@0:   'title' => t('Term parent'),
danielebarchiesi@0:   'keyword' => 'parent_term',
danielebarchiesi@0:   'description' => t('Adds a taxonomy term parent from a term context.'),
danielebarchiesi@0:   'required context' => new ctools_context_required(t('Term'), 'entity:taxonomy_term'),
danielebarchiesi@0:   'context' => 'ctools_term_parent_context',
danielebarchiesi@0:   'edit form' => 'ctools_term_parent_settings_form',
danielebarchiesi@0:   'defaults' => array('type' => 'top'),
danielebarchiesi@0: );
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * Return a new context based on an existing context.
danielebarchiesi@0:  */
danielebarchiesi@0: function ctools_term_parent_context($context, $conf) {
danielebarchiesi@0:   // If unset it wants a generic, unfilled context, which is just NULL.
danielebarchiesi@0:   if (empty($context->data)) {
danielebarchiesi@0:     return ctools_context_create_empty('entity:taxonomy_term');
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   if (isset($context->data)) {
danielebarchiesi@0:     $result = db_query('SELECT t1.* FROM {taxonomy_term_hierarchy} t1 INNER JOIN {taxonomy_term_hierarchy} t2 ON t1.tid = t2.parent WHERE t2.tid = :tid', array(':tid' => $context->data->tid))->fetchAssoc();
danielebarchiesi@0: 
danielebarchiesi@0:     // If top level term, keep looking up until we see a top level.
danielebarchiesi@0:     if ($conf['type'] == 'top') {
danielebarchiesi@0:       // If looking for top level, and there are no parents at all, make sure
danielebarchiesi@0:       // the current term is the 'top level'.
danielebarchiesi@0:       if (empty($result)) {
danielebarchiesi@0:         $result['tid'] = $context->data->tid;
danielebarchiesi@0:       }
danielebarchiesi@0:       while (!empty($result['parent'])) {
danielebarchiesi@0:         $result = db_query('SELECT * FROM {taxonomy_term_hierarchy} WHERE tid = :tid', array(':tid' => $result['parent']))->fetchAssoc();
danielebarchiesi@0:       }
danielebarchiesi@0:     }
danielebarchiesi@0: 
danielebarchiesi@0:     // Load the term.
danielebarchiesi@0:     if ($result) {
danielebarchiesi@0:       $term = taxonomy_term_load($result['tid']);
danielebarchiesi@0:       return ctools_context_create('entity:taxonomy_term', $term);
danielebarchiesi@0:     }
danielebarchiesi@0:   }
danielebarchiesi@0: }
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * Settings form for the relationship.
danielebarchiesi@0:  */
danielebarchiesi@0: function ctools_term_parent_settings_form($form, &$form_state) {
danielebarchiesi@0:   $conf = $form_state['conf'];
danielebarchiesi@0: 
danielebarchiesi@0:   $form['type'] = array(
danielebarchiesi@0:     '#type' => 'select',
danielebarchiesi@0:     '#title' => t('Relationship type'),
danielebarchiesi@0:     '#options' => array('parent' => t('Immediate parent'), 'top' => t('Top level term')),
danielebarchiesi@0:     '#default_value' => $conf['type'],
danielebarchiesi@0:   );
danielebarchiesi@0: 
danielebarchiesi@0:   return $form;
danielebarchiesi@0: }