make disconnectAll public, add static variables so discovery keys wil…

…l not clash, also add platform and version keys by default

Sources/MultipeerHelper/MultipeerHelper.swift

@@ -6,6 +6,7 @@
 //
 
 import MultipeerConnectivity
+import Foundation
 #if canImport(RealityKit)
 import RealityKit
 #endif
@@ -22,6 +23,10 @@ public class MultipeerHelper: NSObject {
     case both = 3
   }
 
+  public static let compTokenKey = "MPH_CompToken"
+  public static let osVersionKey = "MPH_OSVersion"
+  public static let platformKey = "MPH_Platform"
+
   /// Detemines whether your service is advertising, browsing, or both.
   public let sessionType: SessionType
   public let serviceName: String
@@ -86,7 +91,10 @@ public class MultipeerHelper: NSObject {
       encryptionPreference: encryptionPreference
     )
     session.delegate = self
+    self.setupSession()
+  }
 
+  private func setupSession() {
     if (self.sessionType.rawValue & SessionType.host.rawValue) != 0 {
       var discoveryInfo = self.delegate?.setDiscoveryInfo?()
         ?? [String: String]()
@@ -96,10 +104,21 @@ public class MultipeerHelper: NSObject {
         let networkLoc = NetworkCompatibilityToken.local
         let jsonData = try? JSONEncoder().encode(networkLoc)
         if let encodedToken = String(data: jsonData!, encoding: .utf8) {
-          discoveryInfo["compatibility_token"] = encodedToken
+          discoveryInfo[MultipeerHelper.compTokenKey] = encodedToken
         }
       }
       #endif
+      #if os(iOS) || os(tvOS)
+      discoveryInfo[MultipeerHelper.osVersionKey] = UIDevice.current.systemVersion
+        #if os(iOS)
+        discoveryInfo[MultipeerHelper.platformKey] = "iOS"
+        #else
+        discoveryInfo[MultipeerHelper.platformKey] = "tvOS"
+        #endif
+      #elseif os(macOS)
+      discoveryInfo[MultipeerHelper.osVersionKey] = ProcessInfo.processInfo.operatingSystemVersionString
+      discoveryInfo[MultipeerHelper.platformKey] = "macOS"
+      #endif
       serviceAdvertiser = MCNearbyServiceAdvertiser(
         peer: myPeerID,
         discoveryInfo: discoveryInfo,
@@ -176,12 +195,12 @@ public class MultipeerHelper: NSObject {
 
   /// Method used for disconnecting all services. Once completed,
   /// create a new MultipeerHelper if you want to connect to sessions again.
-  func disconnectAll() {
+  public func disconnectAll() {
     self.serviceAdvertiser?.stopAdvertisingPeer()
     self.serviceBrowser?.stopBrowsingForPeers()
     self.serviceAdvertiser = nil
     self.serviceBrowser = nil
-    self.session.disconnect()
+    self.session?.disconnect()
   }
 }
 

Sources/MultipeerHelper/MultipeerHelperDelegate.swift

@@ -37,7 +37,7 @@ import MultipeerConnectivity
   @objc optional func shouldAcceptJoinRequest(peerID: MCPeerID, context: Data?) -> Bool
 
   /// This will be set as the base for the discoveryInfo, which is sent out by the advertiser (host).
-  /// The key "compatibility_token" is in use by MultipeerHelper, for checking the
+  /// The key "MultipeerHelper.compTokenKey" is in use by MultipeerHelper, for checking the
   /// compatibility of RealityKit versions.
   @objc optional func setDiscoveryInfo() -> [String: String]
 
@@ -60,7 +60,7 @@ extension MultipeerHelperDelegate {
   /// - Returns: Boolean representing whether or not the two devices
   /// have compatible versions of RealityKit.
   public static func checkPeerToken(with discoveryInfo: [String: String]?) -> Bool {
-    guard let compTokenStr = discoveryInfo?["compatibility_token"]
+    guard let compTokenStr = discoveryInfo?[MultipeerHelper.compTokenKey]
           else {
       return false
     }