danielebarchiesi@0: <?php
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * @file
danielebarchiesi@0:  * Plugin to provide access control based upon a parent term.
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: $plugin = array(
danielebarchiesi@0:   'title' => t("Taxonomy: parent term"),
danielebarchiesi@0:   'description' => t('Control access by existence of a parent term.'),
danielebarchiesi@0:   'callback' => 'ctools_term_parent_ctools_access_check',
danielebarchiesi@0:   'default' => array('vid' => array(), 'negate' => 0),
danielebarchiesi@0:   'settings form' => 'ctools_term_parent_ctools_access_settings',
danielebarchiesi@0:   'settings form validation' => 'ctools_term_parent_ctools_access_settings_validate',
danielebarchiesi@0:   'settings form submit' => 'ctools_term_parent_ctools_access_settings_submit',
danielebarchiesi@0:   'summary' => 'ctools_term_parent_ctools_access_summary',
danielebarchiesi@0:   'required context' => new ctools_context_required(t('Term'), array('taxonomy_term', 'terms')),
danielebarchiesi@0: );
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * Settings form for the 'by parent term' access plugin
danielebarchiesi@0:  */
danielebarchiesi@0: function ctools_term_parent_ctools_access_settings($form, &$form_state, $conf) {
danielebarchiesi@0:   // If no configuration was saved before, set some defaults.
danielebarchiesi@0:   if (empty($conf)) {
danielebarchiesi@0:     $conf = array(
danielebarchiesi@0:       'vid' => 0,
danielebarchiesi@0:     );
danielebarchiesi@0:   }
danielebarchiesi@0:   if (!isset($conf['vid'])) {
danielebarchiesi@0:     $conf['vid'] = 0;
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   $form['settings']['vid'] = array(
danielebarchiesi@0:     '#title' => t('Vocabulary'),
danielebarchiesi@0:     '#type' => 'select',
danielebarchiesi@0:     '#options' => array(),
danielebarchiesi@0:     '#description' => t('Select the vocabulary for this form. If there exists a parent term in that vocabulary, this access check will succeed.'),
danielebarchiesi@0:     '#id' => 'ctools-select-vid',
danielebarchiesi@0:     '#default_value' => $conf['vid'],
danielebarchiesi@0:     '#required' => TRUE,
danielebarchiesi@0:   );
danielebarchiesi@0: 
danielebarchiesi@0:   $options = array();
danielebarchiesi@0: 
danielebarchiesi@0:   // Loop over each of the configured vocabularies.
danielebarchiesi@0:   foreach (taxonomy_get_vocabularies() as $vid => $vocabulary) {
danielebarchiesi@0:     $options[$vid] = $vocabulary->name;
danielebarchiesi@0:   }
danielebarchiesi@0:   $form['settings']['vid']['#options'] = $options;
danielebarchiesi@0:   return $form;
danielebarchiesi@0: }
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * Check for access.
danielebarchiesi@0:  */
danielebarchiesi@0: function ctools_term_parent_ctools_access_check($conf, $context) {
danielebarchiesi@0:   // As far as I know there should always be a context at this point, but this
danielebarchiesi@0:   // is safe.
danielebarchiesi@0:   if (empty($context) || empty($context->data) || empty($context->data->vid) || empty($context->data->tid)) {
danielebarchiesi@0:     return FALSE;
danielebarchiesi@0:   }
danielebarchiesi@0: 
danielebarchiesi@0:   // Get the $vid.
danielebarchiesi@0:   if (!isset($conf['vid'])) {
danielebarchiesi@0:     return FALSE;
danielebarchiesi@0:   }
danielebarchiesi@0:   $vid = $conf['vid'];
danielebarchiesi@0: 
danielebarchiesi@0:   $count = db_query('SELECT COUNT(*) FROM {taxonomy_term_hierarchy} th INNER JOIN {taxonomy_term_data} td ON th.parent = td.tid WHERE th.tid = :tid AND td.vid = :vid', array(':tid' => $context->data->tid, ':vid' => $vid))->fetchField();
danielebarchiesi@0: 
danielebarchiesi@0:   return $count ? TRUE : FALSE;
danielebarchiesi@0: }
danielebarchiesi@0: 
danielebarchiesi@0: /**
danielebarchiesi@0:  * Provide a summary description based upon the checked terms.
danielebarchiesi@0:  */
danielebarchiesi@0: function ctools_term_parent_ctools_access_summary($conf, $context) {
danielebarchiesi@0:   $vocab = taxonomy_vocabulary_load($conf['vid']);
danielebarchiesi@0: 
danielebarchiesi@0:   return t('"@term" has parent in vocabulary "@vocab"', array('@term' => $context->identifier, '@vocab' => $vocab->name));
danielebarchiesi@0: }