posthog-1.0.0-alpha5/modules/posthog_js/posthog_js.module

<?php

/**
 * @file
 * Primary module hooks for the Posthog JS module.
 */

use Drupal\Component\Serialization\Json;
use Drupal\Component\Utility\Html;
use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Render\BubbleableMetadata;
use Drupal\Core\Routing\RouteMatchInterface;

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

  $posthogJsSettings = \Drupal::config('posthog_js.settings');
  /** @var \Drupal\posthog_js\ConditionsCheckerInterface $conditionsChecker */
  $conditionsChecker = Drupal::service('posthog_js.conditions_checker');
  $bubbleable_metadata = new BubbleableMetadata();
  // If js conditions don't apply, or the module is disabled, return early:
  if (!$posthogJsSettings->get('enabled') || !$conditionsChecker->apply($bubbleable_metadata)) {
    return;
  }
  // Initiate cacheable metadata:
  $cache = CacheableMetadata::createFromRenderArray($attachments);

  // We want to parse the json string to an array, so we have an object
  // inside javascript to work with:
  $initConfigJsonString = trim($posthogJsSettings->get('init_config_json'));
  $initConfigJson = [];
  if (!empty($initConfigJsonString)) {
    $initConfigJson = Json::decode($initConfigJsonString);
  }
  // Add Posthog JS settings to the page:
  $posthogSettings = \Drupal::config('posthog.settings');
  /** @var \Drupal\posthog\UserAttributesProvider $posthogPropertyProvider */
  $posthogPropertyProvider = \Drupal::service('posthog.user_attributes_provider');
  $attachments['#attached']['drupalSettings']['posthog_js'] = [
    'host' => $posthogSettings->get('host') ?? '',
    'api_key' => $posthogSettings->get('api_key') ?? '',
    'init_config_json' => $initConfigJson,
    'cdn' => $posthogJsSettings->get('cdn'),
    // Note, this is is the only place outside of "UserAttributesProvider" where
    // we want to use this method:
    'distinct_id' => $posthogPropertyProvider->getUserDistinctIdBySetting(),
    'identify_anonymous' => $posthogSettings->get('identify_anonymous'),
    'user_properties' => $posthogPropertyProvider->getCurrentUserProperties(),
  ];
  $attachments['#attached']['library'][] = 'posthog_js/init';

  // Add cacheable metadata:
  $cache->addCacheableDependency($bubbleable_metadata);
  $cache->applyTo($attachments);
}

/**
 * Implements hook_library_info_alter().
 */
function posthog_js_library_info_alter(&$libraries, $module) {
  // If the module is not "posthog_js" or the "cdn" setting is disabled, return
  // early:
  if ($module !== 'posthog_js' || \Drupal::config('posthog_js.settings')->get('cdn')) {
    return;
  }
  // Find the "cdn" library dependency and remove it:
  $key = array_search('posthog_js/cdn', $libraries['init']['dependencies']);
  if ($key !== FALSE) {
    unset($libraries['init']['dependencies'][$key]);
  }
  // Add the "local" library dependency:
  $libraries['init']['dependencies'][] = 'posthog_js/local';
}

/**
 * Implements hook_help().
 */
function posthog_js_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.posthog_js':
      $text = file_get_contents(__DIR__ . '/README.md');
      if (!\Drupal::moduleHandler()->moduleExists('markdown')) {
        return '<pre>' . Html::escape($text) . '</pre>';
      }
      else {
        // Use the Markdown filter to render the README.
        $filter_manager = \Drupal::service('plugin.manager.filter');
        $settings = \Drupal::configFactory()->get('markdown.settings')->getRawData();
        $config = ['settings' => $settings];
        $filter = $filter_manager->createInstance('markdown', $config);
        return $filter->process($text, 'en');
      }
  }
  return NULL;
}