materio-base-d7/sites/all/modules/gui/materiobasemod/materio_showroom.module

<?php

/**
 * Acts on a field collection item being inserted or updated.
 *
 * This hook is invoked before the field collection item is saved to the database.
 *
 * @param FieldCollectionItemEntity $field_collection_item
 *   The field collection item that is being inserted or updated.
 *
 * @see hook_entity_presave()
 */
function materio_showroom_entity_presave($entity, $type) {
  // dsm($type);
  if ($type == 'field_collection_item' && $entity->field_name == 'field_showroom_localisation') {
    // dsm($entity);

    global $user;
    $user = user_load($user->uid); // Make sure the user object is fully loaded
    // dsm($user);
    if(isset($entity->field_showroom_localisation_loca[LANGUAGE_NONE])){

      $user_showroom = $user->field_showroom[LANGUAGE_NONE][0]['tid'];
      // dsm($user_showroom);

      if(empty($entity->field_showroom_localisation_show)){
        $entity->field_showroom_localisation_show[LANGUAGE_NONE] = [];
      }

      foreach ($entity->field_showroom_localisation_loca[LANGUAGE_NONE] as $i => $loca) {
        // if(empty($entity->field_showroom_localisation_show[LANGUAGE_NONE])){
          $entity->field_showroom_localisation_show[LANGUAGE_NONE][] = array('tid'=>'');
        // }
        dsm($entity->field_showroom_localisation_show);

        if(!isset($entity->original->field_showroom_localisation_show[LANGUAGE_NONE][$i]['tid'])){
          $tid = $user_showroom;
        }else{
          $tid = $entity->original->field_showroom_localisation_show[LANGUAGE_NONE][$i]['tid'];
        }
        dsm($tid);
        $entity->field_showroom_localisation_show[LANGUAGE_NONE][$i]['tid'] = $tid;
        dsm($entity->field_showroom_localisation_show);
      }
    }
  }
}

// function materio_showroom_entity_load($entities, $type) {
  // dsm($type);
  // if($type == 'node'){
  //   dsm($entities);
  // }
  // foreach ($entities as $entity) {
  //   $entity->foo = mymodule_add_something($entity, $type);
  // }
// }

// TODO: alter entity translation field permission with field_permission

//     __                     __  _                _______      __    __
//    / /   ____  _________ _/ /_(_)___  ____     / ____(_)__  / /___/ /
//   / /   / __ \/ ___/ __ `/ __/ / __ \/ __ \   / /_  / / _ \/ / __  /
//  / /___/ /_/ / /__/ /_/ / /_/ / /_/ / / / /  / __/ / /  __/ / /_/ /
// /_____/\____/\___/\__,_/\__/_/\____/_/ /_/  /_/   /_/\___/_/\__,_/

// TODO: create own location field
/**
 * Implements hook_field_info().
 *
 * Provides the description of the field.
 */
function materio_showroom_field_info() {
  return array(
    // We name our field as the associative name of the array.
    'field_materio_showroom_location' => array(
      'label' => t('Showroom Location'),
      'description' => t('Define material location by showroom'),
      'default_widget' => 'materio_showroom_location_text',
      'default_formatter' => 'materio_showroom_location_simple_text',
    ),
  );

  // TODO: define in settings wich vocabulary is for showrooms

}

/**
 * Implements hook_field_validate().
 *
 * This hook gives us a chance to validate content that's in our
 * field. We're really only interested in the $items parameter, since
 * it holds arrays representing content in the field we've defined.
 * We want to verify that the items only contain RGB hex values like
 * this: #RRGGBB. If the item validates, we do nothing. If it doesn't
 * validate, we add our own error notification to the $errors parameter.
 *
 * @see field_example_field_widget_error()
 */
function materio_showroom_field_validate($entity_type, $entity, $field, $instance, $langcode, $items, &$errors) {
  foreach ($items as $delta => $item) {
    // if (!empty($item['rgb'])) {
    //   if (!preg_match('@^#[0-9a-f]{6}$@', $item['rgb'])) {
    //     $errors[$field['field_name']][$langcode][$delta][] = array(
    //       'error' => 'field_example_invalid',
    //       'message' => t('Color must be in the HTML format #abcdef.'),
    //     );
    //   }
    // }
  }
}

/**
 * Implements hook_field_is_empty().
 *
 * hook_field_is_empty() is where Drupal asks us if this field is empty.
 * Return TRUE if it does not contain data, FALSE if it does. This lets
 * the form API flag an error when required fields are empty.
 */
function materio_showroom_field_is_empty($item, $field) {
  return empty($item['location']);
}

//     ______                           __
//    / ____/___  _________ ___  ____ _/ /____  __________
//   / /_  / __ \/ ___/ __ `__ \/ __ `/ __/ _ \/ ___/ ___/
//  / __/ / /_/ / /  / / / / / / /_/ / /_/  __/ /  (__  )
// /_/    \____/_/  /_/ /_/ /_/\__,_/\__/\___/_/  /____/

/**
 * Implements hook_field_formatter_info().
 *
 * We need to tell Drupal that we have two different types of formatters
 * for this field. One will change the text color, and the other will
 * change the background color.
 *
 * @see field_example_field_formatter_view()
 */
function materio_showroom_field_formatter_info() {
  return array(
    // This formatter just displays the hex value in the color indicated.
    'materio_showroom_location_simple_text' => array(
      'label' => t('Simple text-based formatter'),
      'field types' => array('field_example_rgb'),
    ),
    // This formatter changes the background color of the content region.
    // 'field_example_color_background' => array(
    //   'label' => t('Change the background of the output text'),
    //   'field types' => array('field_example_rgb'),
    // ),
  );
}


/**
 * Implements hook_field_formatter_view().
 *
 * Two formatters are implemented.
 * - field_example_simple_text just outputs markup indicating the color that
 *   was entered and uses an inline style to set the text color to that value.
 * - field_example_color_background does the same but also changes the
 *   background color of div.region-content.
 *
 * @see field_example_field_formatter_info()
 */
function materio_showroom_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  $element = array();

  switch ($display['type']) {
    // This formatter simply outputs the field as text and with a color.
    case 'materio_showroom_location_simple_text':
      foreach ($items as $delta => $item) {
        $element[$delta] = array(
          // We create a render array to produce the desired markup,
          // "<p style="color: #hexcolor">The color code ... #hexcolor</p>".
          // See theme_html_tag().
          '#type' => 'html_tag',
          '#tag' => 'p',
          // '#attributes' => array(
          //   'style' => 'color: ' . $item['rgb'],
          // ),
          '#value' => t('@loc', array('@loc' => $item['location'])),
        );
      }
      break;

    // This formatter adds css to the page changing the '.region-content' area's
    // background color. If there are many fields, the last one will win.
    // case 'field_example_color_background':
    //   foreach ($items as $delta => $item) {
    //     $element[$delta] = array(
    //       '#type' => 'html_tag',
    //       '#tag' => 'p',
    //       '#value' => t('The content area color has been changed to @code', array('@code' => $item['rgb'])),
    //       '#attached' => array(
    //         'css' => array(
    //           array(
    //             'data' => 'div.region-content { background-color:' . $item['rgb'] . ';}',
    //             'type' => 'inline',
    //           ),
    //         ),
    //       ),
    //     );
    //   }
    //   break;
  }

  return $element;
}

//  _       ___     __           __
// | |     / (_)___/ /___ ____  / /______
// | | /| / / / __  / __ `/ _ \/ __/ ___/
// | |/ |/ / / /_/ / /_/ /  __/ /_(__  )
// |__/|__/_/\__,_/\__, /\___/\__/____/
//                /____/


/**
 * Implements hook_field_widget_info().
 *
 * Three widgets are provided.
 * - A simple text-only widget where the user enters the '#ffffff'.
 * - A 3-textfield widget that gathers the red, green, and blue values
 *   separately.
 * - A farbtastic colorpicker widget that chooses the value graphically.
 *
 * These widget types will eventually show up in hook_field_widget_form,
 * where we will have to flesh them out.
 *
 * @see field_example_field_widget_form()
 */
function materio_showroom_field_widget_info() {
  return array(
    'materio_showroom_location_text' => array(
      'label' => t('Location as text'),
      'field types' => array('field_materio_showroom_location'),
    ),
    // 'field_example_3text' => array(
    //   'label' => t('RGB text field'),
    //   'field types' => array('field_example_rgb'),
    // ),
    // 'field_example_colorpicker' => array(
    //   'label' => t('Color Picker'),
    //   'field types' => array('field_example_rgb'),
    // ),
  );
}


/**
 * Implements hook_field_widget_form().
 *
 * hook_widget_form() is where Drupal tells us to create form elements for
 * our field's widget.
 *
 * We provide one of three different forms, depending on the widget type of
 * the Form API item provided.
 *
 * The 'field_example_colorpicker' and 'field_example_text' are essentially
 * the same, but field_example_colorpicker adds a javascript colorpicker
 * helper.
 *
 * field_example_3text displays three text fields, one each for red, green,
 * and blue. However, the field type defines a single text column,
 * rgb, which needs an HTML color spec. Define an element validate
 * handler that converts our r, g, and b fields into a simulated single
 * 'rgb' form element.
 */
function materio_showroom_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {
  $locval = isset($items[$delta]['location']) ? $items[$delta]['location'] : '';

  global $user;
  $user = user_load($user->uid); // Make sure the user object is fully loaded
  // dsm($user, 'user');

  $showroom_tid = $user->field_showroom[LANGUAGE_NONE][0]['tid'];
  // dsm($user_showroom);
  $showroom_term = taxonomy_term_load($showroom_tid);
  // dsm($showroom_term);

  $widget = $element;
  $widget['#delta'] = $delta;


  switch ($instance['widget']['type']) {
 // TODO: loop through showrooms and don't allow more than one field by show room

    case 'materio_showroom_location_text':

      $widget['showroom_tid'] = array(
        '#type' => 'hidden',
        '#default_value' => $showroom_tid,
        // Allow a slightly larger size that the field length to allow for some
        // configurations where all characters won't fit in input field.
        '#size' => 10,
        '#maxlength' => 10,
      );

      $widget['location'] = array(
        '#type' => 'textfield',
        '#title' => $showroom_term->name,
        '#default_value' => $locval,
        // Allow a slightly larger size that the field length to allow for some
        // configurations where all characters won't fit in input field.
        '#size' => 10,
        '#maxlength' => 10,
      );

      break;

  }

  $element['location'] = $widget;
  return $element;
}


/**
 * Validate the individual fields and then convert to RGB string.
 */
function materio_showroom_location_text_validate($element, &$form_state) {
  // @todo: Isn't there a better way to find out which element?
  // $delta = $element['#delta'];
  // $field = $form_state['field'][$element['#field_name']][$element['#language']]['field'];
  // $field_name = $field['field_name'];
  // if (isset($form_state['values'][$field_name][$element['#language']][$delta]['rgb'])) {
  //   $values = $form_state['values'][$field_name][$element['#language']][$delta]['rgb'];
  //   foreach (array('r', 'g', 'b') as $colorfield) {
  //     $colorfield_value = hexdec($values[$colorfield]);
  //     // If they left any empty, we'll set the value empty and quit.
  //     if (strlen($values[$colorfield]) == 0) {
  //       form_set_value($element, '', $form_state);
  //       return;
  //     }
  //     // If they gave us anything that's not hex, reject it.
  //     if ((strlen($values[$colorfield]) != 2) || $colorfield_value < 0 || $colorfield_value > 255) {
  //       form_error($element[$colorfield], t("Saturation value must be a 2-digit hexadecimal value between 00 and ff."));
  //     }
  //   }
  //
  //   $value = sprintf('#%02s%02s%02s', $values['r'], $values['g'], $values['b']);
  //   form_set_value($element, $value, $form_state);
  // }
}

/**
 * Implements hook_field_widget_error().
 *
 * hook_field_widget_error() lets us figure out what to do with errors
 * we might have generated in hook_field_validate(). Generally, we'll just
 * call form_error().
 *
 * @see field_example_field_validate()
 * @see form_error()
 */
function materio_showroom_field_widget_error($element, $error, $form, &$form_state) {
  switch ($error['error']) {
    case 'materio_showroom_invalid':
      form_error($element, $error['message']);
      break;
  }
}