diff core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,156 @@
+<?php
+
+namespace Drupal\language\Plugin\LanguageNegotiation;
+
+use Drupal\Core\Language\LanguageInterface;
+use Drupal\Core\PathProcessor\OutboundPathProcessorInterface;
+use Drupal\Core\Render\BubbleableMetadata;
+use Drupal\Core\Url;
+use Drupal\language\LanguageNegotiationMethodBase;
+use Drupal\language\LanguageSwitcherInterface;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Identify language from a request/session parameter.
+ *
+ * @LanguageNegotiation(
+ *   id = Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationSession::METHOD_ID,
+ *   weight = -6,
+ *   name = @Translation("Session"),
+ *   description = @Translation("Language from a request/session parameter."),
+ *   config_route_name = "language.negotiation_session"
+ * )
+ */
+class LanguageNegotiationSession extends LanguageNegotiationMethodBase implements OutboundPathProcessorInterface, LanguageSwitcherInterface {
+
+  /**
+   * Flag used to determine whether query rewriting is active.
+   *
+   * @var bool
+   */
+  protected $queryRewrite;
+
+  /**
+   * The query parameter name to rewrite.
+   *
+   * @var string
+   */
+  protected $queryParam;
+
+  /**
+   * The query parameter value to be set.
+   *
+   * @var string
+   */
+  protected $queryValue;
+
+  /**
+   * The language negotiation method id.
+   */
+  const METHOD_ID = 'language-session';
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getLangcode(Request $request = NULL) {
+    $config = $this->config->get('language.negotiation')->get('session');
+    $param = $config['parameter'];
+    $langcode = $request && $request->query->get($param) ? $request->query->get($param) : NULL;
+    if (!$langcode && isset($_SESSION[$param])) {
+      $langcode = $_SESSION[$param];
+    }
+    return $langcode;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function persist(LanguageInterface $language) {
+    // We need to update the session parameter with the request value only if we
+    // have an authenticated user.
+    $langcode = $language->getId();
+    if ($langcode && $this->languageManager) {
+      $languages = $this->languageManager->getLanguages();
+      if ($this->currentUser->isAuthenticated() && isset($languages[$langcode])) {
+        $config = $this->config->get('language.negotiation')->get('session');
+        $_SESSION[$config['parameter']] = $langcode;
+      }
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
+    if ($request) {
+      // The following values are not supposed to change during a single page
+      // request processing.
+      if (!isset($this->queryRewrite)) {
+        if ($this->currentUser->isAnonymous()) {
+          $languages = $this->languageManager->getLanguages();
+          $config = $this->config->get('language.negotiation')->get('session');
+          $this->queryParam = $config['parameter'];
+          $this->queryValue = $request->query->has($this->queryParam) ? $request->query->get($this->queryParam) : NULL;
+          $this->queryRewrite = isset($languages[$this->queryValue]);
+        }
+        else {
+          $this->queryRewrite = FALSE;
+        }
+      }
+
+      // If the user is anonymous, the user language negotiation method is
+      // enabled, and the corresponding option has been set, we must preserve
+      // any explicit user language preference even with cookies disabled.
+      if ($this->queryRewrite) {
+        if (!isset($options['query'][$this->queryParam])) {
+          $options['query'][$this->queryParam] = $this->queryValue;
+        }
+        if ($bubbleable_metadata) {
+          // Cached URLs that have been processed by this outbound path
+          // processor must be:
+          $bubbleable_metadata
+            // - invalidated when the language negotiation config changes, since
+            //   another query parameter may be used to determine the language.
+            ->addCacheTags($this->config->get('language.negotiation')->getCacheTags())
+            // - varied by the configured query parameter.
+            ->addCacheContexts(['url.query_args:' . $this->queryParam]);
+        }
+      }
+    }
+    return $path;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getLanguageSwitchLinks(Request $request, $type, Url $url) {
+    $links = [];
+    $config = $this->config->get('language.negotiation')->get('session');
+    $param = $config['parameter'];
+    $language_query = isset($_SESSION[$param]) ? $_SESSION[$param] : $this->languageManager->getCurrentLanguage($type)->getId();
+    $query = [];
+    parse_str($request->getQueryString(), $query);
+
+    foreach ($this->languageManager->getNativeLanguages() as $language) {
+      $langcode = $language->getId();
+      $links[$langcode] = [
+        // We need to clone the $url object to avoid using the same one for all
+        // links. When the links are rendered, options are set on the $url
+        // object, so if we use the same one, they would be set for all links.
+        'url' => clone $url,
+        'title' => $language->getName(),
+        'attributes' => ['class' => ['language-link']],
+        'query' => $query,
+      ];
+      if ($language_query != $langcode) {
+        $links[$langcode]['query'][$param] = $langcode;
+      }
+      else {
+        $links[$langcode]['attributes']['class'][] = 'session-active';
+      }
+    }
+
+    return $links;
+  }
+
+}