<?php

/**
 * @file
 * Handles integration of Nyan cat templates because we love kittens.
 */

use Drupal\Core\Extension\Extension;

/**
 * Includes .theme file from themes.
 *
 * @param \Drupal\Core\Extension\Extension $theme
 *   The theme extension object.
 */
function nyan_cat_init(Extension $theme) {
  $theme->load();
}

/**
 * Implements hook_theme().
 */
function nyan_cat_theme($existing, $type, $theme, $path) {
  $templates = drupal_find_theme_functions($existing, [$theme]);
  $templates += drupal_find_theme_templates($existing, '.nyan-cat.html', $path);
  return $templates;
}

/**
 * Implements hook_extension().
 */
function nyan_cat_extension() {
  return '.nyan-cat.html';
}

/**
 * Implements hook_render_template().
 *
 * @param string $template_file
 *   The filename of the template to render.
 * @param mixed[] $variables
 *   A keyed array of variables that will appear in the output.
 *
 * @return string
 *   The output generated by the template.
 */
function nyan_cat_render_template($template_file, $variables) {
  $output = str_replace('div', 'nyancat', file_get_contents(\Drupal::root() . '/' . $template_file));
  foreach ($variables as $key => $variable) {
    if (strpos($output, '9' . $key) !== FALSE) {
      $output = str_replace('9' . $key, theme_render_and_autoescape($variable), $output);
    }
  }
  return $output;
}
