relation_migrate.module in Relation 8.2

Migrations between *reference fields and relations.

File

relation_migrate/relation_migrate.module

<?php

/**
 * @file
 * Migrations between *reference fields and relations.
 */
use Drupal\relation\Entity\RelationType;
use Drupal\user\Entity\User;

/**
 * Implements hook_menu().
 */
function relation_migrate_menu() {
  $items['admin/structure/relation/migrate'] = array(
    'title' => 'Migration',
    'access arguments' => array(
      'administer relation types',
    ),
    'page callback' => 'drupal_get_form',
    'page arguments' => array(
      'relation_migrate_configuration_form',
    ),
    'description' => 'Configure migration between *reference fields and relations.',
    'type' => MENU_LOCAL_TASK,
  );
  return $items;
}

/**
 * Configuration form callback.
 */
function relation_migrate_configuration_form($form, &$form_state) {
  $field_types = array(
    'entityreference',
    'taxonomy_term_reference',
    'node_reference',
    'user_reference',
  );
  foreach ($field_types as $field_type_name) {
    $field_type_info = field_info_field_types($field_type_name);
    $fields = field_read_fields(array(
      'type' => $field_type_name,
    ));
    if (!empty($field_type_info) && !empty($fields)) {
      $form[$field_type_name] = array(
        '#type' => 'fieldset',
        '#title' => check_plain($field_type_info['label']),
      );
      $options = array();
      foreach ($fields as $name => $field) {
        $options[$name] = check_plain($name);
      }
      $form[$field_type_name]['relation_migrate_' . $field_type_name . '_fields'] = array(
        '#type' => 'checkboxes',
        '#title' => t('Fields'),
        '#options' => $options,
        '#default_value' => variable_get('relation_migrate_' . $field_type_name . '_fields', array()),
        '#description' => t('Select fields of type %type, that should be migrated to relation entites.', array(
          '%type' => $field_type_info['label'],
        )),
      );
      $form[$field_type_name]['relation_migrate_' . $field_type_name . '_relation_type'] = array(
        '#type' => 'select',
        '#title' => t('Relation type'),
        '#options' => relation_get_relation_types_options(),
        '#default_value' => variable_get('relation_migrate_' . $field_type_name . '_relation_type', NULL),
        '#description' => t('Select relation type that should be used when migrating reference fields.'),
        '#element_validate' => array(
          '_relation_migrate_validate_type',
        ),
      );
      $user = User::load(variable_get('relation_migrate_' . $field_type_name . '_user', 1));
      $form[$field_type_name]['relation_migrate_' . $field_type_name . '_user'] = array(
        '#type' => 'textfield',
        '#title' => t('User'),
        '#default_value' => $user->name,
        '#description' => t('User that should own created relations.'),
        '#autocomplete_path' => 'user/autocomplete',
        '#element_validate' => array(
          '_relation_migrate_uid_validate',
        ),
      );
    }
  }
  return system_settings_form($form);
}

/**
 * Validate function for UID field at configuration form.
 * Transforms user name to UID.
 */
function _relation_migrate_uid_validate($element, &$form_state, $form) {
  $user = user_load_by_name($form_state['values'][$element['#name']]);
  if ($user) {
    $form_state['values'][$element['#name']] = $user->uid;
  }
  else {
    form_error($element, t('User not found.'));
  }
}

/**
 * Validates relation type selection on configuration form.
 *
 * Check if selected relation type allows usage of source bundle.
 */
function _relation_migrate_validate_type($element, &$form_state, $form) {
  if (!empty($form_state['input']['relation_migrate_' . $element['#array_parents'][0] . '_relation_type'])) {
    module_load_include('inc', 'relation_migrate', 'relation_migrate.modules');
    $field_type = field_info_field_types($element['#array_parents'][0]);
    $relation_type = RelationType::load($form_state['input']['relation_migrate_' . $element['#array_parents'][0] . '_relation_type']);
    $function = $field_type['module'] . '_relation_migrate_type_target_validate';
    if (function_exists($function)) {
      if (!$function($element, $form_state, $form) || !_relation_migrate_validate_type_source($form_state['input']['relation_migrate_' . $element['#array_parents'][0] . '_fields'], $relation_type)) {
        form_error($element, t('Relation type %relation_type cannot be used with one of the selected %FieldType fields. <a href="@rel_type_url">Check allowed source/target bundles for the relation type</a>.', array(
          '%relation_type' => $relation_type
            ->label(),
          '%FieldType' => $field_type['label'],
          '@rel_type_url' => url('admin/structure/relation/manage/' . $relation_type
            ->id() . '/edit'),
        )));
      }
    }
  }
}

/**
 * Checks if selected relation type supports all possible source bundles of a
 * given field.
 */
function _relation_migrate_validate_type_source($fields, $relation_type) {
  $allowed_bundles = $relation_type->source_bundles;
  $fields = array_filter($fields);
  foreach ($fields as $field_name) {
    $field = field_info_field($field_name);
    foreach ($field['bundles'] as $entity_type => $bundles) {
      if (!in_array($entity_type . ':*', $allowed_bundles)) {
        foreach ($bundles as $bundle) {
          if (!in_array($entity_type . ':' . $bundle, $allowed_bundles)) {
            return FALSE;
          }
        }
      }
    }
  }
  return TRUE;
}

/**
 * Implements hook_migrate_api().
 */
function relation_migrate_migrate_api() {
  $api = array(
    'api' => 2,
    'migrations' => array(
      'RelationMigrateEntityReference' => array(
        'class_name' => 'RelationMigrateEntityReference',
      ),
      'RelationMigrateNodeReference' => array(
        'class_name' => 'RelationMigrateNodeReference',
      ),
      'RelationMigrateUserReference' => array(
        'class_name' => 'RelationMigrateUserReference',
      ),
      'RelationMigrateTermReference' => array(
        'class_name' => 'RelationMigrateTermReference',
      ),
    ),
  );
  return $api;
}

Functions

Name	Description
relation_migrate_configuration_form	Configuration form callback.
relation_migrate_menu	Implements hook_menu().
relation_migrate_migrate_api	Implements hook_migrate_api().
_relation_migrate_uid_validate	Validate function for UID field at configuration form. Transforms user name to UID.
_relation_migrate_validate_type	Validates relation type selection on configuration form.
_relation_migrate_validate_type_source	Checks if selected relation type supports all possible source bundles of a given field.