farmOS/modules/farm/farm_livestock/farm_livestock.module

<?php
/**
 * @file
 * Code for the Farm Livestock feature.
 */

include_once 'farm_livestock.features.inc';

/**
 * Implements hook_farm_ui_entities().
 */
function farm_livestock_farm_ui_entities() {
  return array(
    'farm_asset' => array(
      'animal' => array(
        'label' => t('Animal'),
        'label_plural' => t('Animals'),
        'view' => 'farm_animals',
      ),
    ),
    'log' => array(
      'farm_medical' => array(
        'label' => t('Medical record'),
        'label_plural' => t('Medical records'),
        'view' => 'farm_log_medical',
      ),
    ),
    'taxonomy_term' => array(
      'farm_animal_groups' => array(
        'label' => t('Group'),
        'label_plural' => t('Groups'),
        'view' => 'farm_animal_groups',
        'farm_asset' => 'animal',
      ),
      'farm_animal_types' => array(
        'label' => t('Type'),
        'label_plural' => t('Types'),
        'view' => 'farm_animal_types',
        'farm_asset' => 'animal',
      ),
    ),
  );
}

/**
 * Implements hook_farm_area_type_info().
 */
function farm_livestock_farm_area_type_info() {
  return array(
    'paddock' => array(
      'label' => t('Paddock'),
      'style' => 'farm_map_style_dark_green',
      'weight' => 5,
    ),
  );
}

/**
 * Implements hook_farm_ui_actions().
 */
function farm_livestock_farm_ui_actions() {

  // Define farm area actions.
  $actions = array(
    'medical' => array(
      'title' => t('Add a medical record'),
      'href' => 'log/add/farm_medical',
      'assets' => array(
        'animal',
      ),
    ),
  );
  return $actions;
}

/**
 * Implements hook_farm_asset_view_views().
 */
function farm_livestock_farm_asset_view_views($farm_asset) {

  // If the entity is not an animal, bail.
  if ($farm_asset->type != 'animal') {
    return array();
  }

  // Return a list of Views to include on Animals.
  return array(
    array(
      'name' => 'farm_log_activity',
      'weight' => 0,
    ),
    array(
      'name' => 'farm_log_observation',
      'weight' => 10,
    ),
    array(
      'name' => 'farm_log_medical',
      'weight' => 20,
    ),
    array(
      'name' => 'farm_log_input',
      'weight' => 50,
    ),
    array(
      'name' => 'farm_log_harvest',
      'weight' => 60,
    ),
    array(
      'name' => 'farm_log_movement',
      'weight' => 100,
    ),
    array(
      'name' => 'farm_asset_children',
      'display' => 'page',
      'title' => t('Children'),
      'weight' => 110,
    ),
  );
}

/**
 * Implements hook_farm_taxonomy_term_view_views().
 */
function farm_livestock_farm_taxonomy_term_view_views($term) {

  // Start a list of View names.
  $views = array();

  // Switch logic depending on the vocabulary.
  switch ($term->vocabulary_machine_name) {

    // Farm areas:
    case 'farm_areas':
      $views[] = array(
        'name' => 'farm_animals',
        'weight' => -10,
      );
      break;

    // Farm animal groups:
    case 'farm_animal_groups':
      $views[] = array(
        'name' => 'farm_animals',
        'arg' => 2,
        'always' => TRUE,
      );
      break;

    // Farm animal types:
    case 'farm_animal_types':
      $views[] = array(
        'name' => 'farm_animals',
        'arg' => 3,
        'always' => TRUE,
      );
      break;
  }

  return $views;
}

/**
 * Implements hook_farm_area_links().
 */
function farm_livestock_farm_area_links($id) {
  $links = array();

  // Add link to livestock.
  $view = views_get_view('farm_animals');
  $view->preview('default', array($id));
  if ($view->total_rows > 0) {
    $links[] = array(
      'title' => t('Animals') . ': ' . $view->total_rows,
      'href' => 'farm/assets/animals/' . $id,
    );
  }

  return $links;
}

/**
 * Implements hook_views_post_render().
 */
function farm_livestock_views_post_render(&$view, &$output, &$cache) {

  // If this is the Farm Animals page...
  if ($view->name == 'farm_animals' && $view->current_display == 'page') {

    // If dashboard maps are disabled in the farm_map module settings, bail.
    if (!variable_get('farm_map_show', TRUE)) {
      return;
    }

    // If there are any arguments, bail.
    /**
     * @todo
     * Display a map that is filtered by the same arguments.
     */
    if (!empty($view->args)) {
      return;
    }

    // If the View result is not empty...
    if (!empty($view->result)) {

      // Add the Animals asset map to the top of the View.
      $map = \Drupal\openlayers\Openlayers::load('Map', 'farm_assets_animal');
      if (!empty($map)) {
        $map_build = $map->build();
        $output = drupal_render($map_build) . $output;
      }
    }
  }
}

/**
 * Implements hook_farm_log_allowed_asset_reference_type().
 */
function farm_livestock_farm_log_allowed_asset_reference_type($log_type) {

  // On medical logs, only animals can be referenced.
  if ($log_type == 'farm_medical') {
    return 'animal';
  }
}

/**
 * Implements hook_farm_log_categories().
 */
function farm_livestock_farm_log_categories() {

  // Provide an "Animals" log category.
  return array('Animals');
}