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