Club Drupal

<?php

/**

 * @file

 * Plugin to provide a relationship handler for a field collection field.

 */

// Plugin definition.

$plugin = array(

  'title' => t('Field collection item'),

  'description' => t('Creates an entity context from a field collection field on a field.'),

  'context' => 'field_collection_field_collection_from_field_context',

  'edit form' => 'field_collection_field_collection_from_field_edit_form',

  'get child' => 'field_collection_field_collection_from_field_get_child',

  'get children' => 'field_collection_field_collection_from_field_get_children',

  'defaults' => array('delta' => 0),

);

/**

 * Get child callback.

 */

function field_collection_field_collection_from_field_get_child($plugin, $parent, $child) {

  $plugins = field_collection_field_collection_from_field_get_children($plugin, $parent);

  return $plugins[$parent . ':' . $child];

}

/**

 * Get children callback.

 */

function field_collection_field_collection_from_field_get_children($plugin, $parent) {

  $plugins = array();

  $instances_info = field_info_instances();

  if (isset($instances_info['field_collection_item'])) {

    $field_collection_items = $instances_info['field_collection_item'];

    foreach (field_read_instances() as $instance) {

      if (isset($field_collection_items[$instance['field_name']])) {

        $child_plugin_id = $parent . ':' . $instance['entity_type'] . ':' . $instance['bundle'] . ':' . $instance['field_name'];

        $child_plugin = $plugin;

        $child_plugin['context name'] = $instance['entity_type'] . ':' . $instance['bundle'] . ':' . $instance['field_name'];

        $child_plugin['title'] = t(

          '!label field collection (!field_name) from !entity_type (!bundle)',

          array(

          '!label' => $instance['label'],

          '!field_name' => $instance['field_name'],

          '!entity_type' => $instance['entity_type'],

          '!bundle' => $instance['bundle']

          )

        );

        $restrictions = array('type' => array($instance['bundle']));

        $child_plugin['required context'] = new ctools_context_required(ucfirst($instance['entity_type']), $instance['entity_type'], $restrictions);

        $child_plugin['parent'] = $parent;

        $child_plugin['keyword'] = 'Field collection';

        $child_plugin['entity_type'] = $instance['entity_type'];

        $child_plugin['field_name'] = $instance['field_name'];

        $child_plugin['name'] = $child_plugin_id;

        $plugins[$child_plugin_id] = $child_plugin;

      }

    }

  }

  return $plugins;

}

/**

 * Return a new field collection context based on an existing context.

 */

function field_collection_field_collection_from_field_context($context, $conf) {

  $plugin_info = ctools_get_relationship($conf['name']);

  $delta = (int) $conf['delta'];

  $entity = $context->data;

  if (isset($entity->{$plugin_info['field_name']})) {

    $items = field_get_items($plugin_info['entity_type'], $entity, $plugin_info['field_name']);

    if (isset($items[$delta]['value'])) {

      $field_collection_item = field_collection_item_load($items[$delta]['value']);

    }

    return ctools_context_create('entity:field_collection_item', $items[$delta]['value']);

  }

  return ctools_context_create_empty('entity:field_collection_item', NULL);

}

/**

 * Settings form.

 */

function field_collection_field_collection_from_field_edit_form($form, &$form_state) {

  $conf = $form_state['conf'];

  $form['delta'] = array(

    '#type' => 'textfield',

    '#title' => t('Delta'),

    '#size' => 3,

    '#description' => t('The relationship can only create one context, but multiple items can be related. Please type in the number you want. The first one will be 0.'),

    '#default_value' => empty($conf['delta']) ? 0 : $conf['delta'],

  );

  return $form;

}