Add NWBrowser and NWConnection code.

TODO: Refactor all of this stuff better
2023-02-08 20:19:23 -05:00 · 2023-02-08 20:19:23 -05:00 · 5f429b8cb4
commit 5f429b8cb4
parent dd4324e395
9 changed files with 293 additions and 148 deletions
--- a/KlipperMon.xcodeproj/project.pbxproj
+++ b/KlipperMon.xcodeproj/project.pbxproj
@ -7,8 +7,8 @@
 	objects = {

 /* Begin PBXBuildFile section */
+		E124B9D929941A4D00C0D2D2 /* PrinterConfigView.swift in Sources */ = {isa = PBXBuildFile; fileRef = E124B9D829941A4D00C0D2D2 /* PrinterConfigView.swift */; };
 		E180B5E92992CD9100425DB0 /* KlipperMonApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B5E82992CD9100425DB0 /* KlipperMonApp.swift */; };
-		E180B5EB2992CD9100425DB0 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B5EA2992CD9100425DB0 /* ContentView.swift */; };
 		E180B5ED2992CD9200425DB0 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = E180B5EC2992CD9200425DB0 /* Assets.xcassets */; };
 		E180B5F02992CD9200425DB0 /* Preview Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = E180B5EF2992CD9200425DB0 /* Preview Assets.xcassets */; };
 		E180B5F22992CD9200425DB0 /* Persistence.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B5F12992CD9200425DB0 /* Persistence.swift */; };
@ -16,9 +16,9 @@
 		E180B6002992CD9300425DB0 /* KlipperMonTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B5FF2992CD9300425DB0 /* KlipperMonTests.swift */; };
 		E180B60A2992CD9300425DB0 /* KlipperMonUITests.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B6092992CD9300425DB0 /* KlipperMonUITests.swift */; };
 		E180B60C2992CD9300425DB0 /* KlipperMonUITestsLaunchTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B60B2992CD9300425DB0 /* KlipperMonUITestsLaunchTests.swift */; };
-		E180B61B2992CF2200425DB0 /* KlipperWebsocket.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B61A2992CF2200425DB0 /* KlipperWebsocket.swift */; };
 		E180B61D2992D53700425DB0 /* PrinterObjectsQuery.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B61C2992D53700425DB0 /* PrinterObjectsQuery.swift */; };
 		E180B61F2992DBB000425DB0 /* KlipperMonMenuBarExtraView.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B61E2992DBB000425DB0 /* KlipperMonMenuBarExtraView.swift */; };
+		E180B6222993256E00425DB0 /* PrinterRequestManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = E180B6212993256E00425DB0 /* PrinterRequestManager.swift */; };
 /* End PBXBuildFile section */

 /* Begin PBXContainerItemProxy section */
@ -39,9 +39,10 @@
 /* End PBXContainerItemProxy section */

 /* Begin PBXFileReference section */
+		E124B9D72993FE5500C0D2D2 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist; path = Info.plist; sourceTree = "<group>"; };
+		E124B9D829941A4D00C0D2D2 /* PrinterConfigView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PrinterConfigView.swift; sourceTree = "<group>"; };
 		E180B5E52992CD9100425DB0 /* KlipperMon.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = KlipperMon.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		E180B5E82992CD9100425DB0 /* KlipperMonApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KlipperMonApp.swift; sourceTree = "<group>"; };
-		E180B5EA2992CD9100425DB0 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 		E180B5EC2992CD9200425DB0 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		E180B5EF2992CD9200425DB0 /* Preview Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = "Preview Assets.xcassets"; sourceTree = "<group>"; };
 		E180B5F12992CD9200425DB0 /* Persistence.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Persistence.swift; sourceTree = "<group>"; };
@ -52,9 +53,9 @@
 		E180B6052992CD9300425DB0 /* KlipperMonUITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = KlipperMonUITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		E180B6092992CD9300425DB0 /* KlipperMonUITests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KlipperMonUITests.swift; sourceTree = "<group>"; };
 		E180B60B2992CD9300425DB0 /* KlipperMonUITestsLaunchTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KlipperMonUITestsLaunchTests.swift; sourceTree = "<group>"; };
-		E180B61A2992CF2200425DB0 /* KlipperWebsocket.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KlipperWebsocket.swift; sourceTree = "<group>"; };
 		E180B61C2992D53700425DB0 /* PrinterObjectsQuery.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PrinterObjectsQuery.swift; sourceTree = "<group>"; };
 		E180B61E2992DBB000425DB0 /* KlipperMonMenuBarExtraView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KlipperMonMenuBarExtraView.swift; sourceTree = "<group>"; };
+		E180B6212993256E00425DB0 /* PrinterRequestManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PrinterRequestManager.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */

 /* Begin PBXFrameworksBuildPhase section */
@ -105,16 +106,17 @@
 		E180B5E72992CD9100425DB0 /* KlipperMon */ = {
 			isa = PBXGroup;
 			children = (
+				E124B9D72993FE5500C0D2D2 /* Info.plist */,
 				E180B5E82992CD9100425DB0 /* KlipperMonApp.swift */,
-				E180B5EA2992CD9100425DB0 /* ContentView.swift */,
 				E180B5EC2992CD9200425DB0 /* Assets.xcassets */,
 				E180B5F12992CD9200425DB0 /* Persistence.swift */,
 				E180B5F62992CD9200425DB0 /* KlipperMon.entitlements */,
 				E180B5F32992CD9200425DB0 /* KlipperMon.xcdatamodeld */,
 				E180B5EE2992CD9200425DB0 /* Preview Content */,
-				E180B61A2992CF2200425DB0 /* KlipperWebsocket.swift */,
 				E180B61C2992D53700425DB0 /* PrinterObjectsQuery.swift */,
 				E180B61E2992DBB000425DB0 /* KlipperMonMenuBarExtraView.swift */,
+				E180B6212993256E00425DB0 /* PrinterRequestManager.swift */,
+				E124B9D829941A4D00C0D2D2 /* PrinterConfigView.swift */,
 			);
 			path = KlipperMon;
 			sourceTree = "<group>";
@ -276,10 +278,10 @@
 			files = (
 				E180B61D2992D53700425DB0 /* PrinterObjectsQuery.swift in Sources */,
 				E180B5F52992CD9200425DB0 /* KlipperMon.xcdatamodeld in Sources */,
-				E180B61B2992CF2200425DB0 /* KlipperWebsocket.swift in Sources */,
+				E124B9D929941A4D00C0D2D2 /* PrinterConfigView.swift in Sources */,
 				E180B5F22992CD9200425DB0 /* Persistence.swift in Sources */,
-				E180B5EB2992CD9100425DB0 /* ContentView.swift in Sources */,
 				E180B5E92992CD9100425DB0 /* KlipperMonApp.swift in Sources */,
+				E180B6222993256E00425DB0 /* PrinterRequestManager.swift in Sources */,
 				E180B61F2992DBB000425DB0 /* KlipperMonMenuBarExtraView.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@ -444,6 +446,7 @@
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = KlipperMon/Info.plist;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
@ -471,6 +474,7 @@
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = KlipperMon/Info.plist;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
--- a/KlipperMon/ContentView.swift
+++ b/KlipperMon/ContentView.swift
@ -1,85 +0,0 @@
-//
-//  ContentView.swift
-//  KlipperMon
-//
-//  Created by maddiefuzz on 2/7/23.
-//
-
-import SwiftUI
-import CoreData
-
-struct ContentView: View {
-    @Environment(\.managedObjectContext) private var viewContext
-
-    @FetchRequest(
-        sortDescriptors: [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)],
-        animation: .default)
-    private var items: FetchedResults<Item>
-
-    var body: some View {
-        NavigationView {
-            List {
-                ForEach(items) { item in
-                    NavigationLink {
-                        Text("Item at \(item.timestamp!, formatter: itemFormatter)")
-                    } label: {
-                        Text(item.timestamp!, formatter: itemFormatter)
-                    }
-                }
-                .onDelete(perform: deleteItems)
-            }
-            .toolbar {
-                ToolbarItem {
-                    Button(action: addItem) {
-                        Label("Add Item", systemImage: "plus")
-                    }
-                }
-            }
-            Text("Select an item")
-        }
-    }
-
-    private func addItem() {
-        withAnimation {
-            let newItem = Item(context: viewContext)
-            newItem.timestamp = Date()
-
-            do {
-                try viewContext.save()
-            } catch {
-                // Replace this implementation with code to handle the error appropriately.
-                // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
-                let nsError = error as NSError
-                fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
-            }
-        }
-    }
-
-    private func deleteItems(offsets: IndexSet) {
-        withAnimation {
-            offsets.map { items[$0] }.forEach(viewContext.delete)
-
-            do {
-                try viewContext.save()
-            } catch {
-                // Replace this implementation with code to handle the error appropriately.
-                // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
-                let nsError = error as NSError
-                fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
-            }
-        }
-    }
-}
-
-private let itemFormatter: DateFormatter = {
-    let formatter = DateFormatter()
-    formatter.dateStyle = .short
-    formatter.timeStyle = .medium
-    return formatter
-}()
-
-struct ContentView_Previews: PreviewProvider {
-    static var previews: some View {
-        ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
-    }
-}
--- a/KlipperMon/Info.plist
+++ b/KlipperMon/Info.plist
@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSBonjourServices</key>
+	<array>
+		<string>_http._tcp.</string>
+	</array>
+	<key>CFBundleURLTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeRole</key>
+			<string>Viewer</string>
+			<key>CFBundleURLName</key>
+			<string>soyuz</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<string>soyuz</string>
+			</array>
+		</dict>
+	</array>
+	<key>NSServices</key>
+	<array/>
+</dict>
+</plist>
--- a/KlipperMon/KlipperMonApp.swift
+++ b/KlipperMon/KlipperMonApp.swift
@ -7,7 +7,6 @@

 import SwiftUI

-
@main
 struct KlipperMonMenuBarApp: App {
    let persistenceController = PersistenceController.shared
@ -15,29 +14,22 @@ struct KlipperMonMenuBarApp: App {
    @State var currentIcon = "move.3d"
    
    var body: some Scene {
-        WindowGroup {
-            ContentView()
+        WindowGroup(id: "floating-stats") {
+            KlipperMonMenuBarExtraView(currentMenuBarIcon: $currentIcon)
                .environment(\.managedObjectContext, persistenceController.container.viewContext)
+                //.frame(width: 300, height: 140)
        }
+        //.windowResizability(.contentSize)
+        
+        Window("Configuration", id: "soyuz_cfg", content: {
+            PrinterConfigView()
+        })
        
        MenuBarExtra("Soyuz", systemImage: currentIcon) {
            KlipperMonMenuBarExtraView(currentMenuBarIcon: $currentIcon)
+                .padding([.top, .leading, .trailing], 8)
+                .padding([.bottom], 6)
        }
        .menuBarExtraStyle(.window)
    }
 }
-
-protocol MenuBarExtraIconUpdater {
-    func updateIcon(systemName: String)
-}
-
-struct KlipperMonApp: App {
-    let persistenceController = PersistenceController.shared
-
-    var body: some Scene {
-        WindowGroup {
-            ContentView()
-                .environment(\.managedObjectContext, persistenceController.container.viewContext)
-        }
-    }
-}
--- a/KlipperMon/KlipperMonMenuBarExtraView.swift
+++ b/KlipperMon/KlipperMonMenuBarExtraView.swift
@ -6,46 +6,172 @@
 //

 import SwiftUI
+import AppKit
+import Network
+
+struct KlipperMenuBarButtonStyle: ButtonStyle {
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .padding()
+            .foregroundColor(.white)
+    }
+}

 struct KlipperMonMenuBarExtraView: View {
+    let DANGERTEMP = 40.0
+    
+    @Environment(\.openWindow) var openWindow
+    
+    @ObservedObject var printerManager = PrinterRequestManager.shared
+    
+    @State var printerObjectsQuery: PrinterObjectsQuery?
    @State var printPercentage: Double = 0
+    
+    // TODO: Don't forget, create @State variable for printer status (i.e. "Printing", etc)
+    // and programmatically add a "connecting" section
+    @State var printerStatus: String = ""
+    
    @Binding var currentMenuBarIcon: String
    
+    @State var hotendHotTemp: Bool = false
+    @State var bedHotTemp: Bool = false
+    
+    @State var nwBrowserDiscoveredItems: [NWEndpoint] = []
+    
+    var nwBrowser = NWBrowser(for: .bonjour(type: "_moonraker._tcp.", domain: "local."), using: .tcp)
+    
    let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
    
+    // TODO: Use @published API data instead of instance state variable
    var body: some View {
-        Label(String(printPercentage), systemImage: "thermometer.snowflake.circle")
+        VStack {
+            // Printer Readouts
+            if let queryResults = printerManager.printerObjectsQuery {
+                Text(queryResults.result.status.print_stats.state.capitalized)
+                    .font(.title)
+                    .padding(4)
+                // Print information
+                HStack {
+                    Image(systemName: "pencil.tip")
+                        .rotationEffect(Angle(degrees: 180))
+                        .offset(x: 5.5, y: 4)
+                        .font(.system(size: 24))
+                    ProgressView(value: queryResults.result.status.virtual_sdcard.progress, total: 1.0)
+                        .progressViewStyle(.linear)
+                        .offset(x: 10)
+                    Text("\(Int(queryResults.result.status.virtual_sdcard.progress * 100))%")
+                        .padding(2)
+                        .padding([.leading], 8)
+                }
+                // Temperatures
+                HStack {
+                    // Hot-end temperature
+                    HStack {
+                        Image(systemName: "flame")
+                            .foregroundColor( hotendHotTemp ? .red : .white )
+                            .opacity( hotendHotTemp ? 1.0 : 0.3 )
+                        Text("Hotend")
+                            .font(.headline)
+                        Spacer()
+                        Text("\(Int(queryResults.result.status.extruder.temperature))°C")
+                    }
+                    // Bed temperature
+                    HStack {
+                        Image(systemName: "flame")
+                            .foregroundColor( bedHotTemp ? .red : .white )
+                            .opacity( bedHotTemp ? 1.0 : 0.3 )
+                        Text("Plate")
+                            .font(.headline)
+                        Spacer()
+                        Text("\(Int(queryResults.result.status.heater_bed.temperature))°C")
+                    }
+                }
+                Divider()
+            }
+        }
+        .frame(minWidth: 220, minHeight: 100)
+        //        .overlay {
+        //            if !printerManager.printerCommsOkay {
+        //                RoundedRectangle(cornerRadius: 10, style: .circular)
+        //                    .foregroundColor(.black)
+        //                    .frame(minWidth: 300, minHeight: 100)
+        //                    .opacity(0.6)
+        //            }
+        //        }
+        // Footer information
+        HStack {
+            Button {
+                print("Button pressed")
+                openWindow(id: "soyuz_cfg")
+            } label: {
+                Text("Server Config")
+                    .foregroundColor(.white)
+            }
+            Spacer()
+            if(printerManager.printerCommsOkay) {
+                Image(systemName: "network")
+                Text("Online")
+            } else {
+                Image(systemName: "xmark")
+                Text("Offline")
+            }
+        }
+        .padding(4)
+        .frame(minWidth: 220, maxWidth: 250)
        .onReceive(timer) { input in
            Task {
-                    self.printPercentage = await self.getPrintPercentage()
-                }
-            }
+                await printerManager.queryPrinterStats()
                
-        Button("Check Printer") {
-            currentMenuBarIcon = "flame"
+                if let query = printerManager.printerObjectsQuery {
+                    hotendHotTemp = (query.result.status.extruder.temperature > DANGERTEMP) ? true : false
+                    bedHotTemp = (query.result.status.heater_bed.temperature > DANGERTEMP) ? true : false
+                    printerStatus = query.result.status.print_stats.state.capitalized
+                } else {
+                    printerStatus = "Connecting..."
                }
            }
-    
-    func getPrintPercentage() async -> Double {
-        guard let url = URL(string: "http://10.0.21.39/printer/objects/query?extruder=temperature") else {
-            fatalError("Missing URL")
        }
-        
-        let urlRequest = URLRequest(url: url)
-        do {
-            let (data, response) = try await URLSession.shared.data(for: urlRequest)
-            guard let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
-                print("Error!")
-                return -1
+        // Testing bonjour stuff
+        .onAppear {
+            nwBrowser.browseResultsChangedHandler = { (newResults, changes) in
+                print("[update] Results changed.")
+                newResults.forEach { result in
+                    print(result)
+                    self.nwBrowserDiscoveredItems.append(result.endpoint)
+                }
+                //self.nwBrowserDiscoveredItems.append(newResults.description)
+            }
+            nwBrowser.stateUpdateHandler = { newState in
+                switch newState {
+                case .failed(let error):
+                    print("[error] nwbrowser: \(error)")
+                case .ready:
+                    print("[ready] nwbrowser")
+                case .setup:
+                    print("[setup] nwbrowser")
+                default:
+                    break
+                }
+            }
+            nwBrowser.start(queue: DispatchQueue.main)
+        }
+        ForEach(nwBrowserDiscoveredItems, id: \.hashValue) { item in
+            Button {
+                let connection = NWConnection(to: item, using: .tcp)
+                connection.stateUpdateHandler = { newState in
+                    switch newState {
+                    case .failed(let error):
+                        print("[error] nwconnection: \(error)")
+                    case .ready:
+                        print("[ready] nwconnection")
+                    default:
+                        break
+                    }
+                }
+                connection.start(queue: DispatchQueue.main)
+            } label: {
+                Text(item.debugDescription)
            }
-            print(String(data: data, encoding: .utf8))
-            let decoder = JSONDecoder()
-            let printerObjectsQuery = try decoder.decode(PrinterObjectsQuery.self, from: data)
-            return printerObjectsQuery.result.status.extruder.temperature
-            // handle data as JSON
-        } catch {
-            print("Error!")
-            return -1
        }
    }
 }
@ -56,3 +182,4 @@ struct KlipperMonMenuBarExtraView_Previews: PreviewProvider {
        KlipperMonMenuBarExtraView(currentMenuBarIcon: $currentMenuBarIcon)
    }
 }
+
--- a/KlipperMon/KlipperWebsocket.swift
+++ b/KlipperMon/KlipperWebsocket.swift
@ -1,9 +0,0 @@
-//
-//  KlipperWebsocket.swift
-//  KlipperMon
-//
-//  Created by maddiefuzz on 2/7/23.
-//
-
-import Foundation
-
--- a/KlipperMon/PrinterConfigView.swift
+++ b/KlipperMon/PrinterConfigView.swift
@ -0,0 +1,20 @@
+//
+//  PrinterConfigView.swift
+//  KlipperMon
+//
+//  Created by maddiefuzz on 2/8/23.
+//
+
+import SwiftUI
+
+struct PrinterConfigView: View {
+    var body: some View {
+        Text("Config Printer In Here")
+    }
+}
+
+struct PrinterConfigView_Previews: PreviewProvider {
+    static var previews: some View {
+        PrinterConfigView()
+    }
+}
--- a/KlipperMon/PrinterObjectsQuery.swift
+++ b/KlipperMon/PrinterObjectsQuery.swift
@ -17,9 +17,33 @@ struct ResultsData: Decodable {
 }

 struct StatusData: Decodable {
+    let virtual_sdcard: VirtualSDCardData
    let extruder: ExtruderData
+    let print_stats: PrintStatsData
+    let heater_bed: HeaterBedData
+}
+
+struct VirtualSDCardData: Decodable {
+    let file_path: String?
+    let progress: Double
+    let is_active: Bool
 }

 struct ExtruderData: Decodable {
    let temperature: Double
+    let target: Double
+    let power: Double
+}
+
+struct PrintStatsData: Decodable {
+    let filename: String
+    let print_duration: Double
+    let filament_used: Double
+    let state: String
+}
+
+struct HeaterBedData: Decodable {
+    let temperature: Double
+    let target: Double
+    let power: Double
 }
--- a/KlipperMon/PrinterRequestManager.swift
+++ b/KlipperMon/PrinterRequestManager.swift
@ -0,0 +1,47 @@
+//
+//  PrinterRequestManager.swift
+//  KlipperMon
+//
+//  Created by maddiefuzz on 2/7/23.
+//
+
+import Foundation
+import Network
+
+@MainActor
+class PrinterRequestManager: ObservableObject {
+    @Published var printerObjectsQuery: PrinterObjectsQuery?
+    
+    @Published var printerCommsOkay = false
+    
+    static let shared = PrinterRequestManager()
+    
+    //let nwBrowser = NWBrowser(for: .bonjour(type: "_moonraker._tcp", domain: "local."), using: .tcp)
+    
+    private init() {
+        
+    }
+    
+    func queryPrinterStats() async {
+        guard let url = URL(string: "http://10.0.21.39/printer/objects/query?extruder&virtual_sdcard&print_stats&heater_bed") else {
+            fatalError("Missing URL")
+        }
+        
+        let urlRequest = URLRequest(url: url)
+        do {
+            let (data, response) = try await URLSession.shared.data(for: urlRequest)
+            guard let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
+                print("Error with response.")
+                return
+            }
+            // handle data as JSON
+            let decoder = JSONDecoder()
+            printerObjectsQuery = try decoder.decode(PrinterObjectsQuery.self, from: data)
+            printerCommsOkay = true
+            //return printerObjectsQuery.result.status.extruder.temperature
+        } catch {
+            print("Exception thrown: \(error)")
+            printerCommsOkay = false
+        }
+    }
+}