fix: logs now show up in mac console app

Sources/Tracking/Util/Log.swift

@@ -1,34 +1,49 @@
 import Foundation
+import os.log
+import OSLog
 
-public protocol Logger {
-    func verbose(_ message: String)
+/// mockable logger + abstract that allows you to log to multiple places if you wish
+public protocol Logger: AutoMockable {
+    /// the noisey log level. Feel free to spam this log level with any
+    /// information about the SDK that would be useful for debugging the SDK.
     func debug(_ message: String)
+    /// Not noisy log messages. Good for general information such as
+    /// when the background queue begins and ends running but use `debug`
+    /// for the status of each background queue task running.
     func info(_ message: String)
-    func warning(_ message: String)
+    /// the SDK is in an unstable state that you want to notify
+    /// the customer or our development team about.
     func error(_ message: String)
 }
 
+// log messages to console.
 // sourcery: InjectRegister = "Logger"
 public class ConsoleLogger: Logger {
-    private let prefix = "[Cio]"
+    // allows filtering in Console mac app
+    private let logSubsystem = "io.customer.sdk"
+    private let logCategory = "CIO"
 
-    public func verbose(_ message: String) {
-        print("\(prefix) Verbose: \(message)")
+    // Unified logging for Swift. https://www.avanderlee.com/workflow/oslog-unified-logging/
+    // This means we can view logs in xcode console + Console app.
+    private func printMessage(_ message: String, _ level: OSLogType) {
+        if #available(iOS 14, *) {
+            let logger = os.Logger(subsystem: self.logSubsystem, category: self.logCategory)
+            logger.info("\(message, privacy: .public)")
+        } else {
+            let logger = OSLog(subsystem: logSubsystem, category: logCategory)
+            os_log("%{public}@", log: logger, type: .info, message)
+        }
     }
 
     public func debug(_ message: String) {
-        print("\(prefix) Debug: \(message)")
+        printMessage(message, .debug)
     }
 
     public func info(_ message: String) {
-        print("\(prefix) Info: \(message)")
-    }
-
-    public func warning(_ message: String) {
-        print("\(prefix) Warning: \(message)")
+        printMessage(message, .info)
     }
 
     public func error(_ message: String) {
-        print("\(prefix) Error: \(message)")
+        printMessage(message, .error)
     }
 }