diff core/lib/Drupal/Core/Logger/LoggerChannel.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Logger/LoggerChannel.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,186 @@
+<?php
+
+namespace Drupal\Core\Logger;
+
+use Drupal\Core\Session\AccountInterface;
+use Psr\Log\LoggerInterface;
+use Psr\Log\LoggerTrait;
+use Psr\Log\LogLevel;
+use Symfony\Component\HttpFoundation\RequestStack;
+
+/**
+ * Defines a logger channel that most implementations will use.
+ */
+class LoggerChannel implements LoggerChannelInterface {
+  use LoggerTrait;
+
+  /**
+   * Maximum call depth to self::log() for a single log message.
+   *
+   * It's very easy for logging channel code to call out to other library code
+   * that will create log messages. In that case, we will recurse back in to
+   * LoggerChannel::log() multiple times while processing a single originating
+   * message. To prevent infinite recursion, we track the call depth and bail
+   * out at LoggerChannel::MAX_CALL_DEPTH iterations.
+   *
+   * @var int
+   */
+  const MAX_CALL_DEPTH = 5;
+
+  /**
+   * Number of times LoggerChannel::log() has been called for a single message.
+   *
+   * @var int
+   */
+  protected $callDepth = 0;
+
+  /**
+   * The name of the channel of this logger instance.
+   *
+   * @var string
+   */
+  protected $channel;
+
+  /**
+   * Map of PSR3 log constants to RFC 5424 log constants.
+   *
+   * @var array
+   */
+  protected $levelTranslation = [
+    LogLevel::EMERGENCY => RfcLogLevel::EMERGENCY,
+    LogLevel::ALERT => RfcLogLevel::ALERT,
+    LogLevel::CRITICAL => RfcLogLevel::CRITICAL,
+    LogLevel::ERROR => RfcLogLevel::ERROR,
+    LogLevel::WARNING => RfcLogLevel::WARNING,
+    LogLevel::NOTICE => RfcLogLevel::NOTICE,
+    LogLevel::INFO => RfcLogLevel::INFO,
+    LogLevel::DEBUG => RfcLogLevel::DEBUG,
+  ];
+
+  /**
+   * An array of arrays of \Psr\Log\LoggerInterface keyed by priority.
+   *
+   * @var array
+   */
+  protected $loggers = [];
+
+  /**
+   * The request stack object.
+   *
+   * @var \Symfony\Component\HttpFoundation\RequestStack
+   */
+  protected $requestStack;
+
+  /**
+   * The current user object.
+   *
+   * @var \Drupal\Core\Session\AccountInterface
+   */
+  protected $currentUser;
+
+  /**
+   * Constructs a LoggerChannel object
+   *
+   * @param string $channel
+   *   The channel name for this instance.
+   */
+  public function __construct($channel) {
+    $this->channel = $channel;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function log($level, $message, array $context = []) {
+    if ($this->callDepth == self::MAX_CALL_DEPTH) {
+      return;
+    }
+    $this->callDepth++;
+
+    // Merge in defaults.
+    $context += [
+      'channel' => $this->channel,
+      'link' => '',
+      'user' => NULL,
+      'uid' => 0,
+      'request_uri' => '',
+      'referer' => '',
+      'ip' => '',
+      'timestamp' => time(),
+    ];
+    // Some context values are only available when in a request context.
+    if ($this->requestStack && $request = $this->requestStack->getCurrentRequest()) {
+      $context['request_uri'] = $request->getUri();
+      $context['referer'] = $request->headers->get('Referer', '');
+      $context['ip'] = $request->getClientIP();
+      try {
+        if ($this->currentUser) {
+          $context['user'] = $this->currentUser;
+          $context['uid'] = $this->currentUser->id();
+        }
+      }
+      catch (\Exception $e) {
+        // An exception might be thrown if the database connection is not
+        // available or due to another unexpected reason. It is more important
+        // to log the error that we already have so any additional exceptions
+        // are ignored.
+      }
+    }
+
+    if (is_string($level)) {
+      // Convert to integer equivalent for consistency with RFC 5424.
+      $level = $this->levelTranslation[$level];
+    }
+    // Call all available loggers.
+    foreach ($this->sortLoggers() as $logger) {
+      $logger->log($level, $message, $context);
+    }
+
+    $this->callDepth--;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setRequestStack(RequestStack $requestStack = NULL) {
+    $this->requestStack = $requestStack;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setCurrentUser(AccountInterface $current_user = NULL) {
+    $this->currentUser = $current_user;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setLoggers(array $loggers) {
+    $this->loggers = $loggers;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addLogger(LoggerInterface $logger, $priority = 0) {
+    $this->loggers[$priority][] = $logger;
+  }
+
+  /**
+   * Sorts loggers according to priority.
+   *
+   * @return array
+   *   An array of sorted loggers by priority.
+   */
+  protected function sortLoggers() {
+    $sorted = [];
+    krsort($this->loggers);
+
+    foreach ($this->loggers as $loggers) {
+      $sorted = array_merge($sorted, $loggers);
+    }
+    return $sorted;
+  }
+
+}