nbg_currency.module

<?php

/**
 * @file
 * Contains nbg_currency.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function nbg_currency_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the nbg_currency module.
    case 'help.page.nbg_currency':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Module for working with NBG Currency API.') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_theme().
 */
function nbg_currency_theme() {
  return [
    'nbg_currency' => [
      'render element' => 'children',
      'variables' => [
        'currency_data' => NULL,
        'module_path' => \Drupal::moduleHandler()
          ->getModule('nbg_currency')->getPath(),
      ],
    ],
  ];
}