Adding SyslogLogger

src/Util/Logger/Introspection.php

@@ -0,0 +1,103 @@
+<?php
+
+namespace Friendica\Util\Logger;
+
+use Monolog\Logger;
+use Monolog\Processor\ProcessorInterface;
+
+/**
+ * Injects line/file//function where the log message came from
+ *
+ * Based on the class IntrospectionProcessor without the "class" information
+ * @see IntrospectionProcessor
+ */
+class Introspection implements ProcessorInterface
+{
+	private $level;
+
+	private $skipStackFramesCount;
+
+	private $skipClassesPartials;
+
+	private $skipFunctions = [
+		'call_user_func',
+		'call_user_func_array',
+	];
+
+	/**
+	 * @param string|int $level The minimum logging level at which this Processor will be triggered
+	 * @param array $skipClassesPartials An array of classes to skip during logging
+	 * @param int $skipStackFramesCount If the logger should use information from other hierarchy levels of the call
+	 */
+	public function __construct($level = Logger::DEBUG, $skipClassesPartials = array(), $skipStackFramesCount = 0)
+	{
+		$this->level = Logger::toMonologLevel($level);
+		$this->skipClassesPartials = array_merge(array('Monolog\\'), $skipClassesPartials);
+		$this->skipStackFramesCount = $skipStackFramesCount;
+	}
+
+	public function __invoke(array $record)
+	{
+		// return if the level is not high enough
+		if ($record['level'] < $this->level) {
+			return $record;
+		}
+		// we should have the call source now
+		$record['extra'] = array_merge(
+			$record['extra'],
+			$this->getRecord()
+		);
+
+		return $record;
+	}
+
+	/**
+	 * Returns the introspection record of the current call
+	 *
+	 * @return array
+	 */
+	public function getRecord()
+	{
+		$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
+
+		$i = 1;
+
+		while ($this->isTraceClassOrSkippedFunction($trace, $i)) {
+			$i++;
+		}
+
+		$i += $this->skipStackFramesCount;
+
+		return [
+			'file' => isset($trace[$i - 1]['file']) ? basename($trace[$i - 1]['file']) : null,
+			'line' => isset($trace[$i - 1]['line']) ? $trace[$i - 1]['line'] : null,
+			'function' => isset($trace[$i]['function']) ? $trace[$i]['function'] : null,
+		];
+	}
+
+	/**
+	 * Checks if the current trace class or function has to be skipped
+	 *
+	 * @param array $trace The current trace array
+	 * @param int   $index The index of the current hierarchy level
+	 * @return bool True if the class or function should get skipped, otherwise false
+	 */
+	private function isTraceClassOrSkippedFunction(array $trace, $index)
+	{
+		if (!isset($trace[$index])) {
+			return false;
+		}
+
+		if (isset($trace[$index]['class'])) {
+			foreach ($this->skipClassesPartials as $part) {
+				if (strpos($trace[$index]['class'], $part) !== false) {
+					return true;
+				}
+			}
+		} elseif (in_array($trace[$index]['function'], $this->skipFunctions)) {
+			return true;
+		}
+
+		return false;
+	}
+}