--- /dev/null
+<?php
+
+namespace Drupal\advanced_help;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Extension\ThemeHandlerInterface;
+use Drupal\Core\StringTranslation\TranslationInterface;
+use Drupal\Core\Plugin\DefaultPluginManager;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Component\Serialization\Yaml;
+
+/**
+ * AdvancedHelp plugin manager.
+ */
+class AdvancedHelpManager extends DefaultPluginManager {
+ use StringTranslationTrait;
+
+ /**
+ * Constructs an AdvancedHelpManager instance.
+ *
+ * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
+ * Cache backend instance to use.
+ * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+ * The module handler to invoke the alter hook with.
+ * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
+ * Theme handler.
+ * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
+ * The string translation service.
+ */
+ public function __construct(ModuleHandlerInterface $module_handler, ThemeHandlerInterface $theme_handler, CacheBackendInterface $cache_backend, TranslationInterface $string_translation) {
+ $this->module_handler = $module_handler;
+ $this->theme_handler = $theme_handler;
+ $this->setStringTranslation($string_translation);
+ $this->alterInfo('advanced_help');
+ $this->setCacheBackend($cache_backend, 'advanced_help', ['advanced_help']);
+ }
+
+ /**
+ * Get the modules/theme list.
+ * @todo cache
+ */
+ public function getModuleList() {
+ $modules = $this->module_handler->getModuleList();
+ $themes = $this->theme_handler->listInfo();
+ $result = [];
+
+ foreach ($modules + $themes as $name => $data) {
+ $result[$name] = $this->module_handler->getName($name);
+ }
+ return $result;
+ }
+
+ /**
+ * Get the information for a single help topic.
+ * @param $module
+ * @param $topic
+ * @return string|bool
+ */
+ function getTopic($module, $topic) {
+ $topics = $this->getTopics();
+ if (!empty($topics[$module][$topic])) {
+ return $topics[$module][$topic];
+ }
+ return FALSE;
+ }
+
+ /**
+ * Return the name of the module.
+ * @param string $module
+ * @return string
+ */
+ function getModuleName($module) {
+ return $this->module_handler->getName($module);
+ }
+
+ /**
+ * Search the system for all available help topics.
+ * @todo check visibility of the method.
+ */
+ public function getTopics() {
+ $ini = $this->parseHelp();
+ return $ini['topics'];
+ }
+
+ /**
+ * Returns advanced help settings.
+ * @todo check visibility of the method.
+ */
+ public function getSettings() {
+ $ini = $this->parseHelp();
+ return $ini['settings'];
+ }
+
+
+ /**
+ * Function to parse yml / txt files.
+ *
+ * @todo implement cache
+ * @todo check visibility of the method.
+ */
+ public function parseHelp() {
+ $language = \Drupal::languageManager()->getCurrentLanguage()->getId();
+ static $ini = NULL;
+
+ $cache = $this->cacheGet('advanced_help_ini_' . $language);
+ if ($cache) {
+ $ini = $cache->data;
+ }
+
+ if (!isset($ini)) {
+ $ini = ['topics' => [], 'settings' => []];
+
+ foreach ($this->module_handler->getModuleList() + $this->theme_handler->listInfo() as $plugin_name => $extension) {
+ $module = $plugin_name;
+ $module_path = $extension->getPath();
+ $info = [];
+
+ if (file_exists("$module_path/help/$module.help.yml")) {
+ $path = "$module_path/help";
+ $info = Yaml::decode(file_get_contents("$module_path/help/$module.help.yml"));
+ }
+ elseif (!file_exists("$module_path/help")) {
+ // Look for one or more README files.
+ $files = file_scan_directory("./$module_path",
+ '/^(readme).*\.(txt|md)$/i', ['recurse' => FALSE]);
+ $path = "./$module_path";
+ foreach ($files as $name => $fileinfo) {
+ $info[$fileinfo->filename] = [
+ 'line break' => TRUE,
+ 'readme file' => TRUE,
+ 'file' => $fileinfo->filename,
+ 'title' => $fileinfo->name,
+ ];
+ }
+ }
+
+ if (!empty($info)) {
+ // Get translated titles:
+ $translation = [];
+ if (file_exists("$module_path/translations/help/$language/$module.help.yml")) {
+ $translation = Yaml::decode(file_get_contents("$module_path/translations/help/$language/$module.help.yml"));
+ }
+
+ $ini['settings'][$module] = [];
+ if (!empty($info['advanced help settings'])) {
+ $ini['settings'][$module] = $info['advanced help settings'];
+ unset($info['advanced help settings']);
+
+ // Check translated strings for translatable global settings.
+ if (isset($translation['advanced help settings']['name'])) {
+ $ini['settings']['name'] = $translation['advanced help settings']['name'];
+ }
+ if (isset($translation['advanced help settings']['index name'])) {
+ $ini['settings']['index name'] = $translation['advanced help settings']['index name'];
+ }
+
+ }
+
+ foreach ($info as $name => $topic) {
+ // Each topic should have a name, a title, a file and path.
+ $file = !empty($topic['file']) ? $topic['file'] : $name;
+ $ini['topics'][$module][$name] = [
+ 'name' => $name,
+ 'module' => $module,
+ 'ini' => $topic,
+ 'title' => !empty($translation[$name]['title']) ? $translation[$name]['title'] : $topic['title'],
+ 'weight' => isset($topic['weight']) ? $topic['weight'] : 0,
+ 'parent' => isset($topic['parent']) ? $topic['parent'] : 0,
+ 'popup width' => isset($topic['popup width']) ? $topic['popup width'] : 500,
+ 'popup height' => isset($topic['popup height']) ? $topic['popup height'] : 500,
+ // Require extension.
+ 'file' => isset($topic['readme file']) ? $file : $file . '.html',
+ // Not in .ini file.
+ 'path' => $path,
+ 'line break' => isset($topic['line break']) ? $topic['line break'] : (isset($ini['settings'][$module]['line break']) ? $ini['settings'][$module]['line break'] : FALSE),
+ 'navigation' => isset($topic['navigation']) ? $topic['navigation'] : (isset($ini['settings'][$module]['navigation']) ? $ini['settings'][$module]['navigation'] : TRUE),
+ 'css' => isset($topic['css']) ? $topic['css'] : (isset($ini['settings'][$module]['css']) ? $ini['settings'][$module]['css'] : NULL),
+ 'readme file' => isset($topic['readme file']) ? $topic['readme file'] : FALSE,
+ ];
+ }
+ }
+ }
+ // drupal_alter('advanced_help_topic_info', $ini);
+ $this->cacheSet('advanced_help_ini_' . $language, $ini);
+ }
+ return $ini;
+ }
+
+ /**
+ * Load and render a help topic.
+ *
+ * @todo allow the theme override the help.
+ * @param $module.
+ * @param $topic.
+ * @return array.
+ */
+ public function getTopicFileInfo($module, $topic) {
+ $language = \Drupal::languageManager()->getCurrentLanguage()->getId();
+
+ $info = $this->getTopic($module, $topic);
+ if (empty($info)) {
+ return FALSE;
+ }
+
+ $path_type = (preg_match('/themes/', $info['path'])) ? 'theme' : 'module';
+ // Search paths:
+ $paths = [
+// // Allow theme override.
+// path_to_theme() . '/help',
+ // Translations.
+ drupal_get_path($path_type, $module) . "/translations/help/$language",
+ // In same directory as .inc file.
+ $info['path'],
+ ];
+
+ foreach ($paths as $path) {
+ if (file_exists("$path/$info[file]")) {
+ return ['path' => $path, 'file' => $info['file']];
+ }
+ }
+
+ return FALSE;
+ }
+
+ public function getTopicFileName($module, $topic) {
+ $info = $this->getTopicFileInfo($module, $topic);
+ if ($info) {
+ return "./{$info['path']}/{$info['file']}";
+ }
+ }
+
+}