Removed date formatting from Logger protocol extension

Logger/Logger.swift

@@ -32,18 +32,11 @@ public protocol Logger {
     /// Do not call this method directly.
     ///
     /// - Parameters:
-    ///   - time: Part of the log message provided by `description(for date: Date)` method.
+    ///   - time: The date log method was called.
     ///   - level: The log level.
     ///   - location: Part of the log message provided by `description(for file: String, line: Int, function: String)` method.
     ///   - object: Part of the log message provided by `description(for object: Any)` method.
-    func log(time: String, level: LogLevel, location: String, object: String)
+    func log(time: Date, level: LogLevel, location: String, object: String)
-    
-    /// Transforms `date` into textual representation which will be a part of the log message.
-    ///
-    /// Customization point. Default implementation returns date in format `"yyyy-MM-dd HH:mm:ss.SSS"`.
-    ///
-    /// - Parameter date: The date log method was called.
-    func description(for date: Date) -> String
     
     /// Transforms passed parameters into location textual representation which will be a part of the log message.
     ///
@@ -95,17 +88,11 @@ extension Logger {
     ///   - 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) {
         let now = Date()
-        let time = description(for: now)
         let location = description(for: file, line: line, function: function)
         let objectDescription = description(for: object)
-        log(time: time, level: level, location: location, object: objectDescription)
+        log(time: now, level: level, location: location, object: objectDescription)
     }
-    
+        
-    /// Returns date in format `"yyyy-MM-dd HH:mm:ss.SSS"`.
-    public func description(for date: Date) -> String {
-        return dateFormatter.string(from: date)
-    }
-    
     /// Returns location in format `"<file name>:<line> <function>"`.
     public func description(for file: String, line: Int, function: String) -> String {
         return filename(fromFilePath: file) + ":\(line) \(function)"
@@ -123,10 +110,3 @@ extension Logger {
         return URL(fileURLWithPath: path).deletingPathExtension().lastPathComponent
     }
 }
-
-private let dateFormatter: DateFormatter = {
-    let formatter = DateFormatter()
-    formatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
-    formatter.timeZone = TimeZone(secondsFromGMT: 0)
-    return formatter
-}()

Logger/Loggers/AgregateLogger.swift

@@ -36,7 +36,7 @@ public final class AgregateLogger: Logger {
         self.loggers = loggers
     }
     
-    public func log(time: String, level: LogLevel, location: String, object: String) {
+    public func log(time: Date, level: LogLevel, location: String, object: String) {
         for logger in self.loggers {
             logger.log(time: time, level: level, location: location, object: object)
         }

Logger/Loggers/ConsoleLogger.swift

@@ -26,10 +26,16 @@ import Foundation
 
 /// Logger that writes messages into the standard output.
 public final class ConsoleLogger: Logger {
+    
+    private let formatter: DateFormatter
+    
     public init() {
+        formatter = DateFormatter()
+        formatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
+        formatter.timeZone = TimeZone(secondsFromGMT: 0)
     }
     
-    public func log(time: String, level: LogLevel, location: String, object: String) {
+    public func log(time: Date, level: LogLevel, location: String, object: String) {
-        print(time + " <" + level.rawValue + "> " + location + " " + object)
+        print(formatter.string(from: time) + " <" + level.rawValue + "> " + location + " " + object)
     }
 }

Logger/Loggers/DiskLogger/DiskLogger.swift

@@ -30,6 +30,7 @@ public final class DiskLogger: Logger {
     private let fileURL: URL
     private let fileSizeLimit: UInt64
     private let rotations: Int
+    private let formatter: DateFormatter
     private let queue = DispatchQueue(label: "com.wnagrodzki.DiskLogger", qos: .background, attributes: [], autoreleaseFrequency: .workItem, target: nil)
     private var buffer = Data()
     private var fileWriter: FileWriter!
@@ -44,10 +45,13 @@ public final class DiskLogger: Logger {
         self.fileURL = fileURL
         self.fileSizeLimit = fileSizeLimit
         self.rotations = rotations
+        formatter = DateFormatter()
+        formatter.dateFormat = "yyyy-MM-dd HH:mm:ss.SSS"
+        formatter.timeZone = TimeZone(secondsFromGMT: 0)
     }
     
-    public func log(time: String, level: LogLevel, location: String, object: String) {
+    public func log(time: Date, level: LogLevel, location: String, object: String) {
-        let message = time + " <" + level.rawValue + "> " + location + " " + object + "\n"
+        let message = formatter.string(from: time) + " <" + level.rawValue + "> " + location + " " + object + "\n"
         log(message)
     }
     

Logger/Loggers/NullLogger.swift

@@ -29,15 +29,10 @@ public class NullLogger: Logger {
     public init() {
     }
     
-    public func log(time: String, level: LogLevel, location: String, object: String) {
+    public func log(time: Date, level: LogLevel, location: String, object: String) {
         // noop
     }
     
-    /// Returns empty string to minimize observer effect.
-    public func description(for date: Date) -> String {
-        return ""
-    }
-    
     /// Returns empty string to minimize observer effect.
     public func description(for file: String, line: Int, function: String) -> String {
         return ""