From 41462ded26121b68f5360015e534416308e9dc47 Mon Sep 17 00:00:00 2001
From: Wojciech Nagrodzki <278594+wnagrodzki@users.noreply.github.com>
Date: Tue, 21 Aug 2018 22:11:09 +0200
Subject: [PATCH] Redesign LogLevel to conform to syslog severity levels

---
 Logger/Logger.swift | 47 +++++++++++++++++++++++++++++----------------
 1 file changed, 30 insertions(+), 17 deletions(-)

diff --git a/Logger/Logger.swift b/Logger/Logger.swift
index 128ba6a..2f76349 100644
--- a/Logger/Logger.swift
+++ b/Logger/Logger.swift
@@ -58,33 +58,46 @@ public protocol Logger {
 }
 
 /// Log level controls the conditions under which a message should be logged.
+/// - note: [RFC5424](https://www.rfc-editor.org/info/rfc5424)
 public enum LogLevel: Int {
     
-    /// Use this level to capture information about things that might result a failure.
-    case `default`
+    /// System is unusable.
+    case emergency = 0
     
-    /// Use this level to capture information that may be helpful, but isn’t essential, for troubleshooting errors.
-    case info
+    /// Action must be taken immediately.
+    case alert = 1
     
-    /// Use this level to capture information that may be useful during development or while troubleshooting a specific problem.
-    case debug
+    /// Critical conditions.
+    case critical = 2
     
-    /// Use this log level to capture process-level information to report errors in the process.
-    case error
+    /// Error conditions.
+    case error = 3
     
-    /// Use this level to capture system-level or multi-process information to report system errors.
-    case fault
+    /// Warning conditions.
+    case warning = 4
+    
+    /// Normal but significant conditions.
+    case notice = 5
+    
+    /// Informational messages.
+    case informational = 6
+    
+    /// Debug-level messages.
+    case debug = 7
 }
 
 extension LogLevel: LogStringConvertible {
     
     public var logDescription: String {
         switch self {
-        case .default: return "Default"
-        case .info: return "Info"
-        case .debug: return "Debug"
-        case .error: return "Error"
-        case .fault: return "Fault"
+        case .emergency: return "emerg"
+        case .alert: return "alert"
+        case .critical: return "crit"
+        case .error: return "err"
+        case .warning: return "warning"
+        case .notice: return "notice"
+        case .informational: return "info"
+        case .debug: return "debug"
         }
     }
 }
@@ -95,11 +108,11 @@ extension Logger {
     ///
     /// - Parameters:
     ///   - object: The object to be logged.
-    ///   - level: The log level. If unspecified, the `default` log level is used.
+    ///   - level: The log level.
     ///   - file: **Do not provide a custom value.** The path to the file log method is called from.
     ///   - line: **Do not provide a custom value.** The line number log method is called at.
     ///   - function: **Do not provide a custom value.** The name of the declaration log method is called within.
-    public func log(_ object: Any, level: LogLevel = .default, file: String = #file, line: Int = #line, function: String = #function) {
+    public func log(_ object: Any, level: LogLevel, file: String = #file, line: Int = #line, function: String = #function) {
         let now = Date()
         let location = description(for: file, line: line, function: function)
         let objectDescription = description(for: object)