Installs apps from AltStore via AltServer

AltStore/Server/ServerManager.swift

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+//
+//  ServerManager.swift
+//  AltStore
+//
+//  Created by Riley Testut on 5/30/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import Foundation
+import Network
+
+import AltKit
+
+class ServerManager: NSObject
+{
+    static let shared = ServerManager()
+    
+    private(set) var isDiscovering = false
+    private(set) var discoveredServers = [Server]()
+    
+    private let serviceBrowser = NetServiceBrowser()
+    
+    private override init()
+    {
+        super.init()
+        
+        self.serviceBrowser.delegate = self
+        self.serviceBrowser.includesPeerToPeer = false
+    }
+}
+
+extension ServerManager
+{
+    func startDiscovering()
+    {
+        guard !self.isDiscovering else { return }
+        self.isDiscovering = true
+        
+        self.serviceBrowser.searchForServices(ofType: ALTServerServiceType, inDomain: "")
+    }
+    
+    func stopDiscovering()
+    {
+        guard self.isDiscovering else { return }
+        self.isDiscovering = false
+        
+        self.discoveredServers.removeAll()
+        self.serviceBrowser.stop()
+    }
+}
+
+extension ServerManager: NetServiceBrowserDelegate
+{
+    func netServiceBrowserWillSearch(_ browser: NetServiceBrowser)
+    {
+        print("Discovering servers...")
+    }
+    
+    func netServiceBrowserDidStopSearch(_ browser: NetServiceBrowser)
+    {
+        print("Stopped discovering servers.")
+    }
+    
+    func netServiceBrowser(_ browser: NetServiceBrowser, didNotSearch errorDict: [String : NSNumber])
+    {
+        print("Failed to discovering servers.", errorDict)
+    }
+    
+    func netServiceBrowser(_ browser: NetServiceBrowser, didFind service: NetService, moreComing: Bool)
+    {
+        let server = Server(service: service)
+        guard !self.discoveredServers.contains(server) else { return }
+        
+        self.discoveredServers.append(server)
+    }
+    
+    func netServiceBrowser(_ browser: NetServiceBrowser, didRemove service: NetService, moreComing: Bool)
+    {
+        let server = Server(service: service)
+        
+        if let index = self.discoveredServers.firstIndex(of: server)
+        {
+            self.discoveredServers.remove(at: index)
+        }
+    }
+}