comparison sites/all/modules/ctools/plugins/access/term_has_parent.inc @ 0:ff03f76ab3fe

initial version

+<?php
+/**
+ * @file
+ * Plugin to provide access control based upon a parent term.
+ */
+
+/**
+ * Plugins are described by creating a $plugin array which will be used
+ * by the system that includes this file.
+ */
+$plugin = array(
+  'title' => t("Taxonomy: term has parent(s)"),
+  'description' => t('Control access if a term belongs to a specific parent term.'),
+  'callback' => 'ctools_term_has_parent_ctools_access_check',
+  'default' => array('vid' => array(), 'negate' => 0),
+  'settings form' => 'ctools_term_has_parent_ctools_access_settings',
+  'settings form submit' => 'ctools_term_has_parent_ctools_access_settings_submit',
+  'summary' => 'ctools_term_has_parent_ctools_access_summary',
+  'required context' => new ctools_context_required(t('Term'), array('taxonomy_term', 'terms')),
+);
+
+/**
+ * Settings form for the 'by parent term' access plugin
+ */
+function ctools_term_has_parent_ctools_access_settings($form, &$form_state, $conf) {
+  // If no configuration was saved before, set some defaults.
+  if (empty($conf)) {
+    $conf = array(
+      'vid' => 0,
+    );
+  }
+  if (!isset($conf['vid'])) {
+    $conf['vid'] = 0;
+  }
+
+  $form['settings']['vid'] = array(
+    '#title' => t('Vocabulary'),
+    '#type' => 'select',
+    '#options' => array(),
+    '#description' => t('Select the vocabulary for this form.'),
+    '#id' => 'ctools-select-vid',
+    '#default_value' => $conf['vid'],
+    '#required' => TRUE,
+  );
+
+  ctools_include('dependent');
+  $options = array();
+
+  // A note: Dependency works strangely on these forms as they have never been
+  // updated to a more modern system so they are not individual forms of their
+  // own like the content types.
+
+  $form['settings']['#tree'] = TRUE;
+
+  // Loop over each of the configured vocabularies.
+  foreach (taxonomy_get_vocabularies() as $vid => $vocabulary) {
+    $options[$vid] = $vocabulary->name;
+    $form['settings']['vid_' . $vid] = array(
+      '#title' => t('Terms'),
+      '#description' => t('Select a term or terms from @vocabulary.', array('@vocabulary' => $vocabulary->name)),
+      '#dependency' => array('ctools-select-vid' => array($vocabulary->vid)),
+      '#default_value' => !empty($conf['vid_' . $vid]) ? $conf['vid_' . $vid] : '',
+      '#size' => 10,
+      '#multiple' => TRUE,
+      //@todo: Remove the following workaround when the following patch is in core. {@see:http://drupal.org/node/1117526}
+      '#name' => sprintf("settings[%u][]", $vid),
+      '#attributes' => array('multiple' => 'multiple'),
+    );
+
+    $terms = array();
+    foreach (taxonomy_get_tree($vocabulary->vid) as $term) {
+      $terms[$term->tid] = str_repeat('-', $term->depth) . ($term->depth ? ' ' : '') . $term->name;
+    }
+    //$form['settings']['vid_' . $vid]['#type'] = 'select';
+    $form['settings']['vid_' . $vid]['#type'] = 'checkboxes';
+    $form['settings']['vid_' . $vid]['#options'] = $terms;
+    unset($terms);
+  }
+  $form['settings']['vid']['#options'] = $options;
+  $form['settings']['include_self'] = array(
+    '#title' => t('Include these term(s) as candidates?'),
+    '#description' => t('When this rule is evaluated, should the term(s) you select be included as candidates for access?'),
+    '#default_value' => !empty($conf['include_self']) ? $conf['include_self'] : FALSE,
+    '#type' => 'checkbox',
+  );
+  return $form;
+}
+
+/**
+ * Filters values to store less.
+ */
+function ctools_term_has_parent_ctools_access_settings_submit($form, &$form_state) {
+  foreach ($form_state['values']['settings'] as $key => $value) {
+    if (strpos($key, 'vid_') === 0) {
+      $form_state['values']['settings'][$key] = array_filter($form_state['values']['settings'][$key]);
+    }
+  }
+}
+
+/**
+ * Check for access.
+ */
+function ctools_term_has_parent_ctools_access_check($conf, $context) {
+  // As far as I know there should always be a context at this point, but this
+  // is safe.
+  if (empty($context) || empty($context->data) || empty($context->data->vid) || empty($context->data->tid)) {
+    return FALSE;
+  }
+
+  // Get the $vid.
+  if (!isset($conf['vid'])) {
+    return FALSE;
+  }
+  $vid = $conf['vid'];
+
+  // we'll start looking up the hierarchy from our context term id.
+  $current_term = $context->data->tid;
+
+  $term='';
+
+  // scan up the tree.
+  while (true) {
+    // select parent as term_parent to avoid PHP5 complications with the parent keyword
+    //@todo: Find a way to reduce the number of queries required for really deep hierarchies.
+    $term = db_query("SELECT parent AS term_parent, tid AS tid FROM {taxonomy_term_hierarchy} th WHERE th.tid = :tid", array(':tid'=>$current_term))->fetchObject();
+
+    // if no term is found, get out of the loop
+    if (!$term || empty($term->tid)) {
+      break;
+    }
+
+    // check the term selected, if the user asked it to.
+    if (!empty($conf['include_self']) && isset($conf['vid_' . $vid][$term->tid])) {
+      return TRUE;
+    }
+
+    // did we find the parent TID we were looking for?
+    if (isset($conf['vid_' . $vid][$term->tid])) {
+      // YES, we're done!
+      return TRUE;
+    }
+    // Nope, we didn't find it.
+
+    // If this is the top of the hierarchy, stop scanning.
+    if ($term->term_parent==0) {
+      break;
+    }
+
+    // update the parent, and keep scanning.
+    $current_term = $term->term_parent;
+  }
+
+  return FALSE;
+}
+
+/**
+ * Provide a summary description based upon the checked terms.
+ */
+function ctools_term_has_parent_ctools_access_summary($conf, $context) {
+  $vid = (int)$conf['vid'];
+  $terms = array();
+  foreach ($conf['vid_' . $vid] as $tid) {
+    $term = taxonomy_term_load($tid);
+    $terms[] = $term->name;
+  }
+
+  return format_plural(count($terms),
+    '@term can have the parent "@terms"',
+    '@term can have one of these parents: @terms',
+    array('@terms' => implode(', ', $terms),
+      '@term' => $context->identifier));
+}