<?php

/**
 * @file
 * Contains melt_sticky_drawer.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function melt_sticky_drawer_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the melt_sticky_drawer module.
    case 'help.page.melt_sticky_drawer':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Creates a sticky footer until element is scrolled into view') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_theme().
 */
function melt_sticky_drawer_theme() {
  return [
    'melt_sticky_drawer' => [
      'render element' => 'children',
    ],
  ];
}

/**
 * Implements hook_page_attachments().
 */
function melt_sticky_drawer_page_attachments(&$attachments) {

  // Exit if we're on an admin route.
  if (\Drupal::service('router.admin_context')->isAdminRoute()) {
    return FALSE;
  }

  $config    = \Drupal::config('melt_sticky_drawer.stickydrawer');
  $manager   = \Drupal::service('plugin.manager.condition');
  $condition = $manager->createInstance('request_path');

  $condition->setConfiguration($config->get('request_path'));

  // Pass JS related files to front end if the Page restrictions
  // text area is empty or has paths which we'll treat as those
  // we don't want JS to run on.
  if (empty($config->get('request_path')['pages']) || $condition->evaluate()) {
    $attachments['#attached']['drupalSettings']['meltStickyDrawer'] = [
      'target' => $config->get('target_selector'),
      'targetWrapper' => $config->get('target_wrapper_selector'),
      'toggle' => $config->get('toggle_selector'),
      'toggleAction' => $config->get('toggle_action'),
      'scrollToContainer' => $config->get('scrollToContainer_selector'),
      'scrollToOffset' => $config->get('scrollTo_yoffset'),
    ];

    $attachments['#attached']['library'][] = 'melt_sticky_drawer/stickydrawer';
  }

}