<?php


/**
 * @file
 * Plugin to provide access control based on existence of a specified context.
 */

$plugin = array(
  'title' => t("Node: is flagged"),
  'description' => t('Control access by whether or not a node is flagged.'),
  'callback' => 'flag_is_flagged_ctools_access_check',
  'default' => array('flag_name' => ''),
  'settings form' => 'flag_is_flagged_ctools_access_settings',
  'summary' => 'flag_flagged_ctools_access_summary',
  'required context' => new ctools_context_required(t('Node'), 'node'),
);

/**
 * Settings form
 */
function flag_is_flagged_ctools_access_settings($form, &$form_state, $conf) {    
  $options = array();

  foreach (flag_get_flags('node') as $flag) {
    $options[$flag->name] = check_plain($flag->title);
  }

  $form['settings']['flag_name'] = array(
    '#title' => t('Flag name'),
    '#type' => 'radios',
    '#options' => $options,
    '#description' => t('Include only flagged content.'),
    '#default_value' => $conf['flag_name'],
  );
  return $form;
}

/**
 * Check for access.
 */
function flag_is_flagged_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->nid)) {
    return FALSE;
  }
  if(!empty($conf['flag_name'])) {
    $flag = flag_get_flag($conf['flag_name']);

    if($flag) {
      return $flag->is_flagged($context->data->nid);
    }
  }
  return TRUE;
}

/**
 * Provide a summary description based upon the specified context
 */
function flag_is_flagged_ctools_access_summary($conf, $context) {
  if (!isset($conf['flag_name'])) {
    $conf['flag_name'] = '';
  }
  $flags = flag_get_flags('node');
  $flag = $conf['flag_name'];

  if (!empty($flag) && !empty($flags[$flag])) {
    return t('@identifier is flagged with "@flag"', array('@flag' => check_plain($flags[$flag]->title), '@identifier' => $context->identifier));
  }
  else {
    return t('Missing/ deleted flag "@flag"', array('@flag' => $flag));
  }
}