ajax_form_entity.module

<?php
/**
 * @file
 * Ajaxify entity forms.
 */

// Must load it to ensure proper submission of node forms (multiple times). TODO : include only if at least one node form is activated.
module_load_include('inc', 'node', 'node.pages');
// module_load_include('inc', 'taxonomy', 'taxonomy.admin');
module_load_include('inc', 'user', 'user.pages');

if (module_exists('field_collection')) {
  module_load_include('inc', 'field_collection', 'field_collection.pages');
}

if (module_exists('entityform')) {
  module_load_include('inc', 'entityform', 'entityform.admin');
}

/**
 * Implements hook_permission().
 */
function ajax_form_entity_permission() {
  return array(
    'administer ajax for entity' => array(
      'title' => t('Administer Ajax form entity'),
      'description' => t('Allow to administer settings for ajax form entity'),
      'restrict access' => TRUE,
    ),
  );
}

/**
 * Implements hook_menu().
 */
function ajax_form_entity_menu() {
  $items = array();
  $items['admin/config/ajax-form-entity'] = array(
    'title' => 'Ajax form entity configs',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('ajax_form_entity_form'),
    'description' => 'Configuration of ajax form entity',
    'access arguments' => array('administer ajax for entity'),
    'file' => 'ajax_form_entity.admin.inc',
    'type' => MENU_NORMAL_ITEM,
  );
  $items['ajax-form-entity-edit/%'] = array(
    'page callback' => 'ajax_form_entity_entity_edit_callback',
    'access callback' => 'user_access',
    'access arguments' => array('access content'),
    'file' => 'ajax_form_entity.callback.inc',
    'type' => MENU_CALLBACK,
  );
  $items['ajax-form-entity-delete/%'] = array(
    'page callback' => 'ajax_form_entity_entity_delete_callback',
    'access callback' => 'user_access',
    'access arguments' => array('access content'),
    'file' => 'ajax_form_entity.callback.inc',
    'type' => MENU_CALLBACK,
  );
  $items['ajax-form-entity-cancel/%'] = array(
    'page callback' => 'ajax_form_entity_entity_cancel_callback',
    'access callback' => 'user_access',
    'access arguments' => array('access content'),
    'type' => MENU_CALLBACK,
  );
  return $items;
}

/**
 * Helper function to correct badly declared entities.
 */
function _ajax_form_entity_load_entities() {

  $return_entities = array();
  // Get all entites.
  $entities = module_invoke_all('entity_info');

  $allowed_entities = array('entityforms', 'node', 'user', 'taxonomy', 'comment', 'field_collection_item');

  // Only select fieldable entites that have bundle defined.
  foreach ($entities as $entity_name => $entity) {
    if (isset($entity['fieldable']) && isset($entity['bundles']) && $entity['bundles'] && array_search($entity_name, $allowed_entities)) {
      $return_entities[$entity_name] =$entity;
    }
  }

  // Correction for entityforms that do not declare its bundles.
  if (isset($entities['entityform_type']) && $entities['entityform_type']) {
    $results = db_query("SELECT type, label FROM {entityform_type}"); // TODO : use entityform_get_types
    $return_entities['entityform'] = $entities['entityform'];
    foreach ($results as $result) {
      $return_entities['entityform']['bundles'][$result->type]['label'] = $result->label;
    }
  }

  return $return_entities;
}

/**
 * Form builder; the entity wall message add form.
 * @ingroup forms
 */
function ajax_form_entity_form_alter(&$form, $form_state, $form_id) {
  // Check if we have an entityform (but no administration form).
  // Do not use $form['#id'] because it may change.

  // TODO : improve detection of admin forms.
  if (isset($form['#entity_type']) && isset($form['#bundle']) && !(arg(0) == 'admin')) {
    $settings = variable_get('ajax_form_entity_' . $form['#entity_type'] . '_' . $form['#bundle'], array());

    if (isset($settings['activate']) && $settings['activate']) {
      // Adds containers for messages & entity view, and form reload wrapper (as form ID in $form may be different from the HTML ID whith AJAX issues).
      if (!isset($form['#prefix']) || !strpos($form['#prefix'], 'form-message-wrapper') && $settings['view_mode_region'] != 0 && $settings['view_mode_region'] != 'id') {
        $form['#prefix'] = '<div id="form-message-wrapper-' . $form['#build_id'] . '"></div><div id="preview-wrapper-top-' . $form['#build_id'] . '"></div><div id="form-reload-' . $form['#build_id'] . '">';
        $form['#suffix'] = '</div><div id="preview-wrapper-bottom-' . $form['#build_id'] . '"></div>';
      }

      // Indicate if it is a creation or modification for the AJAX callback.
      // Special case for Field collection entity  (no ID in the form).
      $id = $settings['id'];

      // Check if it is the first form (there are some settings if it is).
      if (!isset($form_state['build_info']['args'][0]->{$id}) || !$form_state['build_info']['args'][0]->{$id}) {
        $form['new'] = array(
          '#type' => 'value',
          '#value' => TRUE,
        );
      }

      // Compatibility with field collection if on the field collection adding page.
      // TODO : mettre dans ajax_form_entity_field_collection.
      if ($form['#entity_type'] == 'field_collection_item') {
        global $_ajax_form_entity_field_collection;
        if (arg(0) == 'field-collection') {
          $host_entity_type = arg(3);
          $host_entity_id = arg(4);
        }
        elseif ($_ajax_form_entity_field_collection['host_entity_id']) {
          $host_entity_type = $_ajax_form_entity_field_collection['host_entity_type'];
          $host_entity_id = $_ajax_form_entity_field_collection['host_entity_id'];
        }
        $form['host_entity_type'] = array(
          '#type' => 'value',
          '#value' => $host_entity_type,
        );
        $form['host_entity_id'] = array(
          '#type' => 'value',
          '#value' => $host_entity_id,
        );
        $form['#attributes']['id'][] = $form['form_build_id']['#value'];

        if (isset($form['new'])) {
          //$new_form_build['#suffix'] .= l(t('Cancel'), 'ajax-form-entity-collections-cancel/nojs/' . $form_build_id, array('attributes' => array('class' => array('use-ajax button-cancel'))));
          if (arg(1) != 'ajax') {
            $form['#attributes']['style'][] = 'display:none';
            // Add cancel button to close the form
            $form['#suffix'] .= l(t('Cancel'), 'ajax-form-entity-field-collection-cancel/nojs/' . $form['form_build_id']['#value'], array('attributes' => array('class' => array('use-ajax button-collection-cancel cancel-' . $form['form_build_id']['#value']), 'style' => array('display:none'))));
            $form['#prefix'] .= l(t('Add an item'), 'javascript:void(0)', array('attributes' => array('id' => 'open-form' . $form['form_build_id']['#value'], 'class' => 'open-form ' . $form['form_build_id']['#value']), 'fragment' => 'refresh', 'external' => true));

          }
          else {
            // Add cancel button to close the form
            $form['#suffix'] .= l(t('Cancel'), 'ajax-form-entity-field-collection-cancel/nojs/' . $form['form_build_id']['#value'], array('attributes' => array('class' => array('use-ajax button-collection-cancel cancel-' . $form['form_build_id']['#value']))));
            $form['#prefix'] .= l(t('Add an item'), 'javascript:void(0)', array('attributes' => array('id' => 'open-form' . $form['form_build_id']['#value'], 'class' => 'open-form ' . $form['form_build_id']['#value']), 'fragment' => 'refresh', 'external' => true, 'style' => 'display:none'));
          }
        }
      }

      // Add ajax callback to the submit button.
      $form['actions']['submit']['#ajax'] =  array(
        'callback' => 'ajax_form_entity_callback',
        'effect' => 'fade',
      );
      // Load js to autosubmit files (else they are not loaded).
      drupal_add_js(drupal_get_path('module', 'ajax_form_entity') . '/ajax_form_entity.js');
    }
  }
}

/**
 * AJAX submit handler for entity message add form. Returns ajax commands to update the relevant message comments.
 * @return ajax commands (append to messages wrapper)
 */
function ajax_form_entity_callback($form, $form_state) {
  $commands = array();
  // Return just error messages if there is an error.
  if ($errors = form_get_errors()) {
    // Change classes of the forms to display them as error.
    foreach ($errors as $name => $message) {
      $commands[] = ajax_command_invoke('#edit-' . str_replace(array('_', ']['), '-', $name), 'addClass', array('error'));
    }
    $commands[] = ajax_command_html('#form-message-wrapper-' . $form['#build_id'], theme('status_messages'));
    return array('#type' => 'ajax', '#commands' => $commands);
  }
  $entity_type = $form['#entity_type'];
  $bundle = $form['#bundle'];
  $settings = variable_get('ajax_form_entity_' . $entity_type . '_' . $bundle, NULL);

  // Display result of form submission.
  if ($settings['view_mode_region']) {
    // Entity should be loaded again to handle processing certain elements (images for example).
    $ids = array();
    $entities = array();
    $ids[] = $form_state[$entity_type]->{$settings['id']};
    $entities[] = entity_load($form['#entity_type'], $ids, $conditions = array(), FALSE);
    $entities_view = entity_view($form['#entity_type'], $entities[0], $settings['view_mode'], NULL, TRUE);
    $entity_show = drupal_render($entities_view);
    // View entity at the top.
    if ($settings['view_mode_region'] == 'top') {
      $id = 'preview-wrapper-top-' . $form['#build_id'];
      $commands[] = ajax_command_append('#' . $id, $entity_show);
    }
    // Special class that must be put by the user on the page.
    elseif ($settings['view_mode_region'] == 'id') {
      $id = str_replace('_', '-', $entity_type . '-' . $bundle);
      $commands[] = ajax_command_prepend('#' . $id, $entity_show);
    }
    // Default behavio show at the bottom.
    else {
      $id = 'preview-wrapper-bottom-' . $form['#build_id'];
      $commands[] = ajax_command_prepend('#' . $id, $entity_show);
    }

  }

  // Return confirmation messages if any or empty session.
  if ($settings['message']) {
    $commands[] = ajax_command_replace('#form-message-wrapper-' . $form['#build_id'], theme('status_messages'));
  }
  else {
    unset($_SESSION['messages']['status']);
  }

  // Case of creation : respect the settings and reload the form.
  if (isset($form['new']['#value']) && $settings['reload']) {
        // If field collection ,delete former Cancel link of the former form.
    if($entity_type == 'field_collection_item') {
      $commands [] = ajax_command_remove('a.cancel-' . $form['form_build_id']['#value']);
    }
    // Rebuilds the form.
    $form_state['reloaded'] = 1;
    $new_form_build = _ajax_form_entity_build_entity_forms($entity_type, $form, $form_state);
    $commands[] = ajax_command_replace('#form-reload-' . $form['#build_id'], drupal_render($new_form_build));
    //$new_link = l(t('Fermer'), 'javascript:void(0)', array('attributes' => array('id' => 'open-form' . $new_form_build['form_build_id']['#value'], 'class' => 'open-form ' . $new_form_build['form_build_id']['#value']), 'fragment' => 'refresh', 'external'=>true));
    $commands[] = ajax_command_css('#open-form' . $new_form_build['#build_id'], array('display' => 'none'));
  }
  else {
    $commands[] = ajax_command_remove('#form-reload-' . $form['#build_id']);
  }
  $id = str_replace('_', '-', $entity_type . '-' . $bundle);
  $commands[] = ajax_command_css('.remove-' . $id, array('display' => 'none'));
  return array('#type' => 'ajax', '#commands' => $commands);
}

/**
 * Helper function to build forms arguments depending on the entity.
 * @return array() with form arguments
 */
function _ajax_form_entity_build_entity_forms($entity_type, $form = array(), $form_state = array(), $entity = NULL) {
  $new_form_state  = array();

  // TODO : make it more general : everything is the same except the form ID for drupal_get_form.
  switch ($entity_type) {
    // Node form.
    case 'node':
      // Case of creation and case of edition.
      if (!$entity) {
        global $user;
        $entity = (object) array(
          'uid' => $user->uid,
          'name' => (isset($user->name) ? $user->name : ''),
          'type' => $form['type']['#value'],
          'language' => LANGUAGE_NONE,
        );
        $new_form_state['input'] = array();
        $new_form_state['build_info']['args'][] = $entity;
        return drupal_build_form($form['#form_id'], $new_form_state);
      }
      else {
        $entity_id = key($entity);
        return drupal_get_form($entity[$entity_id]->type . '_node_form', $entity[$entity_id]);
      }
      break;

    // User form.
    case 'user':
      if (!$entity) {
        $entity = (object) array();
        $new_form_state['input'] = array();
        $new_form_state['build_info']['args'][] = $entity;
        return drupal_build_form($form['#form_id'], $new_form_state);
      }
      else {
        $entity_id = key($entity);
        return drupal_get_form('user_profile_form', $entity[$entity_id]);
      }
      break;

    // User form.
    case 'taxonomy':
      if (!$entity) {
        $entity = (object) array();
        $new_form_state['input'] = array();
        $new_form_state['build_info']['args'][] = $entity;
        return drupal_build_form($form['#form_id'], $new_form_state);
      }
      else {
        $entity_id = key($entity);
        return drupal_get_form('taxonomy_form_term', $entity[$entity_id]);
      }
      break;

    // Comment form.
    case 'comment':
      if (!$entity) {
        $entity = (object) array('nid' => $form['#node']->nid);
        $new_form_state['input'] = array();
        $new_form_state['build_info']['args'][] = $entity;
        return drupal_build_form($form['#form_id'], $new_form_state);
      }
      else {
        $entity_id = key($entity);
        return drupal_get_form($entity[$entity_id]->node_type . '_form', $entity[$entity_id]);
      }
      break;

    // Entityforms module.
    case 'entityform':
      // Case of creation and case of edition.
      if (!$entity) {
        $entity = entityform_create($values = array());
        $entity->type = $form_state['build_info']['args'][0]->type;
        $new_form_state['input'] = array();
        $new_form_state['build_info']['args'][] = $entity;
        return drupal_build_form($form['#form_id'], $new_form_state);
      }
      else {
        $entity_id = key($entity);
        return drupal_get_form('entityform_edit_form', $entity[$entity_id]);
      }
      break;

    case 'field_collection_item':
      // Create new default field collection entity.
      if (!$entity) {
        $entity = new FieldCollectionItemEntity();
        $host_entity_type = isset($form_state['values']['host_entity_type']) ? $form_state['values']['host_entity_type'] : $form_state['build_info']['args']['host_entity_type'];
        $host_entity_id = isset($form_state['values']['host_entity_id']) ? $form_state['values']['host_entity_id'] : $form_state['build_info']['args']['host_entity_id'];
        $ids[] = $host_entity_id;
        $host_entity = entity_load($host_entity_type, $ids);
        $entity = entity_create('field_collection_item', array('field_name' => $form_state['build_info']['args'][0]->field_name));
        $entity->setHostEntity($host_entity_type, $host_entity[$host_entity_id], LANGUAGE_NONE, FALSE);
        $new_form_state['input'] = array();
        $new_form_state['build_info']['args'][] = $entity;
        $new_form_state['build_info']['args']['host_entity_id'] = $host_entity_id;
        $new_form_state['build_info']['args']['host_entity_type'] = $host_entity_type;
        return drupal_build_form($form['#form_id'], $new_form_state);
      }
      else {
        $entity_id = key($entity);
        return drupal_get_form('field_collection_item_form', $entity[$entity_id]);
      }
      break;

    default:
      break;
  }

  return $new_form_state;
}

/**
 * Adds edit link and modify link.
 * Implements hook_field_extra_fields().
 */
function ajax_form_entity_field_extra_fields() {
  $extra = array();
  $entities = _ajax_form_entity_load_entities();

  foreach ($entities as $entity_name => $entity) {
    foreach ($entity['bundles'] as $bundle_name => $bundle) {
      $settings = variable_get('ajax_form_entity_' . $entity_name . '_' . $bundle_name, array());
      if (isset($settings)) {
        if (isset($settings['edit_activate']) && $settings['edit_activate']==true) {
          $extra[$entity_name][$bundle_name]['display']['ajax_edit_link'] = array(
            'label' => t('Ajax edit link'),
            'description' =>  t('Ajax edit link'),
            'weight' => -1,
          );
        }
        if (isset($settings['delete_activate']) && $settings['delete_activate']==true) {
          $extra[$entity_name][$bundle_name]['display']['ajax_delete_link'] = array(
            'label' => t('Ajax delete link'),
            'description' =>  t('Ajax delete link'),
            'weight' => -1,
          );
        }
      }
    }
  }
  return $extra;
}

/**
 * Implements hook_entity_view_alter().
 */
function ajax_form_entity_entity_view_alter(&$build, $type) {
  if(!isset($build['#bundle'])){
    return;
  }
  $bundle = $build['#bundle'];
  // If activated, process with the entity.
  $settings = variable_get('ajax_form_entity_' . $type . '_' . $bundle, array());

  if (isset($settings['activate']) && $settings['activate']) {
    switch ($type) {
      case 'user':
        $entity = $build['#account'];
        $entity_id = $build['#account']->{$settings['id']};
        break;

      case 'field_collection_item':
        $entity = $build['#entity'];
        $entity_id = $build['#entity']->{$settings['id']};
        break;

      default:
        $entity = $build['#' . $type];
        $entity_id = $build['#' . $type]->{$settings['id']};
    }

    // Special ID for multiple form cases.
    $special_id = uniqid();
    drupal_add_library('system', 'drupal.ajax');

    // Special wrapper.
    if (isset($build['#prefix'])) {
      $build['#prefix'] = '<div id="ajax-entity-form-' . $special_id . '">' . $build['#prefix'];
    }
    else {
      $build['#prefix'] = '<div id="ajax-entity-form-' . $special_id . '">';
    }
    if (isset($build['#suffix'])) {
      $build['#suffix'] .= '</div><div id="ajax-entity-form-wrapper-' . $special_id . '"></div>';
    }
    else {
      $build['#suffix'] = '</div><div id="ajax-entity-form-wrapper-' . $special_id . '"></div>';
    }

    // If AJAX links are activated, add  them.
    $class = 'ajax-entity-form-' . str_replace('_', '-', $type);
    $class = ' ajax-entity-form-' . str_replace('_', '-', $type . '-' . $bundle);
    if (entity_access('update', $build['#entity_type'], $entity)) {
      if ($settings['edit_activate']) {
        $build['ajax_edit_link']['#markup'] = '<div id="ajax-entity-form-edit-' . $special_id . '" class="ajax-entity-form-edit ' . $class . '" >';
        $build['ajax_edit_link']['#markup'] .= l(t('Edit'), 'ajax-form-entity-edit/edit/nojs/' . $type . '/' . $entity_id . '/' . $special_id, array('attributes' => array('class' => array('use-ajax edit-link'))));
        $build['ajax_edit_link']['#markup'] .= '</div>';
      }
    }
    if (entity_access('delete', $build['#entity_type'], $entity)) {
      if ($settings['delete_activate']) {
        $build['ajax_delete_link']['#markup'] = '<div id="ajax-entity-form-delete-' . $special_id . '" class="ajax-entity-form-delete ' . $class . '">';
        $build['ajax_delete_link']['#markup'] .= l(t('delete'), 'ajax-form-entity-delete/delete/nojs/' . $type . '/' . $entity_id . '/' . $special_id, array('attributes' => array('class' => array('use-ajax delete-link'))));
        $build['ajax_delete_link']['#markup'] .= '</div>';
      }
    }
  }
}

/**
 * Ajax callback for closing / cancelling action and reloading the entity.
 */
function ajax_form_entity_entity_cancel_callback($type = 'ajax') {
  // TODO : use hook_menu page argument.
  $special_id = arg(2);
  $commands[] = ajax_command_css('#ajax-entity-form-' . $special_id, array('display' => 'block'));
  $commands[] = ajax_command_replace('#ajax-entity-form-wrapper-' . $special_id, '<div id="ajax-entity-form-wrapper-' . $special_id . '"></div>');
  $page = array('#type' => 'ajax', '#commands' => $commands);
  ajax_deliver($page);
}

/**
 * Theme function for deleted rendered output.
 */
function theme_ajax_form_entity_deleted($vars) {
  $output = '<div id="deleted">';
  $output .= t($vars['content']);
  $output .= '</div>';

  return $output;
}

/**
 * Implementation of hook_theme()s
 * Render some basic output for this module.
 * @return multitype:multitype:multitype:NULL
 */
function ajax_form_entity_theme() {
  return array (
    // Sample theme functions.
    'ajax_form_entity_deleted' => array (
        'function' => 'theme_ajax_form_entity_deleted',
        'variables' => array ( 'content' => NULL ),
      ),
  );
}