feat(*): add sender to files pack result

ios/Classes/Store/NearbyFilesStore.swift

@@ -6,18 +6,19 @@
 //
 
 import Foundation
+import MultipeerConnectivity
 
 class NearbyFilesStore {
     static let instance = NearbyFilesStore()
     
     private var paths : [String] = []
-    private var id: String? = nil
+    private var senderName: String? = nil
     private var maxCount: Int = 0
     private var count: Int = 0
     
     func startReceiving(command: NearbyStartCommand) {
         self.paths.removeAll()
-        self.id = command.id
+        self.senderName = command.senderName
         self.maxCount = command.filesCount
         self.count = 0
     }
@@ -31,16 +32,29 @@ class NearbyFilesStore {
         return maxCount <= count
     }
     
-    func toDartFormat() -> String? {
-        let pathsObject = paths.map { ["path": $0]}
-        do {
-            let jsonData = try JSONSerialization.data(withJSONObject: pathsObject)
-            if let jsonString = String(data: jsonData, encoding: .utf8) {
-                return jsonString
+    func clear() {
+        self.paths.removeAll()
+        self.senderName = nil
+        self.maxCount = 0
+        self.count = 0
+    }
+    
+    func toDartFormat(peerID: MCPeerID) -> String? {
+        if (senderName != nil) {
+            let object = [
+                "files":  paths.map { ["path": $0]},
+                "sender": ["id": peerID.displayName, "displayName": senderName!]
+            ] as [String : Any]
+            do {
+                let jsonData = try JSONSerialization.data(withJSONObject: object)
+                if let jsonString = String(data: jsonData, encoding: .utf8) {
+                    return jsonString
+                }
+            } catch {
+                return nil
             }
-        } catch {
-            return "[]"
+            return nil
         }
-        return "[]"
+        return nil
     }
 }