1 files changed, 90 insertions, 0 deletions
diff --git a/vendor/open-telemetry/api/Behavior/Internal/Logging.php b/vendor/open-telemetry/api/Behavior/Internal/Logging.php
new file mode 100644
index 000000000..e5bec7ab5
--- /dev/null
+++ b/vendor/open-telemetry/api/Behavior/Internal/Logging.php
@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\API\Behavior\Internal;
+
+use OpenTelemetry\API\Behavior\Internal\LogWriter\LogWriterInterface;
+use Psr\Log\LogLevel;
+
+/**
+ * Logging utility functions for internal logging (of OpenTelemetry errors/warnings etc).
+ * This is not part of SDK configuration to avoid creating a dependency on SDK from any package which does logging.
+ * @todo this should be `@internal`, but deptrac is not happy with that.
+ */
+class Logging
+{
+    private const OTEL_LOG_LEVEL = 'OTEL_LOG_LEVEL';
+    private const DEFAULT_LEVEL = LogLevel::INFO;
+    private const NONE = 'none';
+    private const LEVELS = [
+        LogLevel::DEBUG,
+        LogLevel::INFO,
+        LogLevel::NOTICE,
+        LogLevel::WARNING,
+        LogLevel::ERROR,
+        LogLevel::CRITICAL,
+        LogLevel::ALERT,
+        LogLevel::EMERGENCY,
+        self::NONE, //highest priority so that nothing is logged
+    ];
+
+    /**
+     * The minimum log level. Messages with lower severity than this will be ignored.
+     */
+    private static ?int $logLevel = null;
+    private static ?LogWriterInterface $writer = null;
+
+    public static function setLogWriter(LogWriterInterface $writer): void
+    {
+        self::$writer = $writer;
+    }
+
+    public static function logWriter(): LogWriterInterface
+    {
+        self::$writer ??= (new LogWriterFactory())->create();
+
+        return self::$writer;
+    }
+
+    /**
+     * Get level priority from level name
+     */
+    public static function level(string $level): int
+    {
+        $value = array_search($level, self::LEVELS);
+
+        return $value ?: 1; //'info'
+    }
+
+    /**
+     * Get defined OTEL_LOG_LEVEL, or default
+     */
+    public static function logLevel(): int
+    {
+        self::$logLevel ??= self::getLogLevel();
+
+        return self::$logLevel;
+    }
+
+    private static function getLogLevel(): int
+    {
+        $level = array_key_exists(self::OTEL_LOG_LEVEL, $_SERVER)
+            ? $_SERVER[self::OTEL_LOG_LEVEL]
+            : getenv(self::OTEL_LOG_LEVEL);
+        if (!$level) {
+            $level = ini_get(self::OTEL_LOG_LEVEL);
+        }
+        if (!$level) {
+            $level = self::DEFAULT_LEVEL;
+        }
+
+        return self::level($level);
+    }
+
+    public static function reset(): void
+    {
+        self::$logLevel = null;
+        self::$writer = null;
+    }
+}