Merge pull request #127 from adafruit/Caching-Fix

Network response caching - Fixed

PyLeap.xcodeproj/project.pbxproj

@@ -379,6 +379,7 @@
 		D58E1C8628A2B0DE00AB683E /* Wifi View */ = {
 			isa = PBXGroup;
 			children = (
+				D567E2DD28C8D3E20009F768 /* SettingsView */,
 				D58E1C8728A2B10B00AB683E /* WifiView.swift */,
 				D567E2B728C137880009F768 /* WifiCell.swift */,
 				D51D1412293A53BD0028AEDD /* WifiCellViewModel.swift */,
@@ -411,7 +412,6 @@
 		D59DFDB2268CCEAC001737F6 /* Views */ = {
 			isa = PBXGroup;
 			children = (
-				D567E2DD28C8D3E20009F768 /* SettingsView */,
 				D58E1C8628A2B0DE00AB683E /* Wifi View */,
 				D5507ACE26C668BC00512BAA /* UI Components */,
 				D59DFDB3268CCEB9001737F6 /* Onboarding Views */,

PyLeap/Networking/NetworkManager.swift

@@ -26,7 +26,7 @@ class NetworkService: ObservableObject {
         
         // Session Configuration & Caching Policy
         let configuration = URLSessionConfiguration.default
-        //   configuration.requestCachePolicy = .useProtocolCachePolicy
+           configuration.requestCachePolicy = .returnCacheDataElseLoad
         
         return URLSession(configuration: configuration)
     }()
@@ -34,8 +34,8 @@ class NetworkService: ObservableObject {
     
     func fetch(completion: @escaping() -> Void) {
         print("Attempting Network Request")
-        let request = URLRequest(url: URL(string: AdafruitInfo.baseURL)!, cachePolicy: URLRequest.CachePolicy.reloadIgnoringLocalCacheData, timeoutInterval: 60.0)
-        let task = URLSession.shared.dataTask(with: request) { data, response, error in
+        let request = URLRequest(url: URL(string: AdafruitInfo.baseURL)!, cachePolicy: URLRequest.CachePolicy.returnCacheDataElseLoad, timeoutInterval: 60.0)
+        let task = session.dataTask(with: request) { data, response, error in
             
             if let error = error {
                 print("error: \(error)")

PyLeap/Views/UI Components/Buttons.swift

@@ -17,7 +17,7 @@ struct RunItButton: View {
                 .cornerRadius(25)
                 .foregroundColor(Color("pyleap_pink"))
             
-            Text("Run it!")
+            Text("Run")
                 .font(Font.custom("ReadexPro-Regular", size: 25))
                 .foregroundColor(Color.white)
                 .frame(height: 50)

PyLeap/Views/Unpaired View/MainSelectionViewModel.swift

@@ -7,10 +7,49 @@
 
 import Foundation
 import SwiftUI
+import Network
+import Combine
+
+class InternetConnectionManager: ObservableObject {
+    
+    private let monitor = NWPathMonitor()
+    private let queue = DispatchQueue(label: "InternetConnectionMonitor")
+    @Published var isConnected = false
+    
+    init() {
+       
+        startMonitoring(completion: {
+            monitor.pathUpdateHandler = { path in
+                
+                DispatchQueue.main.async {
+                    let newIsConnected = path.status == .satisfied
+                                      if self.isConnected != newIsConnected {
+                                          self.isConnected = newIsConnected
+                                          print("net: \(path.status) \(self.isConnected)")
+                                      }
+                }
+            }
+        })
+    }
+    
+    func startMonitoring(completion:()->Void) {
+       print("Start Monitoring Network")
+        monitor.start(queue: queue)
+        completion()
+        
+    }
+    
+    deinit {
+        print("Network Deinit")
+        monitor.cancel()
+    }
+}
 
 class MainSelectionViewModel: ObservableObject {
     
     @ObservedObject var networkModel = NetworkService()
+    @ObservedObject var networkMonitor = InternetConnectionManager()
+    
     
     let fileManager = FileManager.default
     
@@ -19,23 +58,30 @@ class MainSelectionViewModel: ObservableObject {
     let dataStore = DataStore()
     
     @Published var pdemos : [ResultItem] = []
+    var networkMonitorCancellable: AnyCancellable?
     
     init() {
         let fileURL = documentsDirectory.appendingPathComponent("StandardPyLeapProjects.json")
         
-        if fileManager.fileExists(atPath: fileURL.relativePath) {
+
+        networkMonitorCancellable = networkMonitor.$isConnected.sink { isConnected in
+                    if isConnected {
+                        print("The device is currently connected to the internet.")
+                        // Perform some action when the device is connected to the internet.
+                        self.networkModel.fetch {
+                            self.pdemos = self.dataStore.loadDefaultList()
+                        }
+                        
+                    } else {
+                        print("The device is not currently connected to the internet.")
+                        // Perform some action when the device is not connected to the internet.
                         print("Loading cached remote data.")
                         self.pdemos = self.dataStore.loadDefaultList()
                         
-        } else {
-            print("Cached data not found. Fetching default list.")
-            networkModel.fetch {
-                self.pdemos = self.dataStore.loadDefaultList()
                         
                     }
                 }
         
-        
     }