feat(healthkit): get stepLength and calculate how many steps it takes to get somewhere

StepMap.xcodeproj/project.pbxproj

@@ -249,12 +249,14 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_ENTITLEMENTS = StepMap/StepMap.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_ASSET_PATHS = "\"StepMap/Preview Content\"";
 				DEVELOPMENT_TEAM = SSJBLTMP95;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_NSHealthShareUsageDescription = "We need to access your step length and walking speed to calculate metrics tailored to you";
 				INFOPLIST_KEY_NSLocationAlwaysAndWhenInUseUsageDescription = "We need to access your location to set starting point of your route";
 				INFOPLIST_KEY_NSLocationWhenInUseUsageDescription = "We need to access your location to set starting point of your route";
 				INFOPLIST_KEY_UIApplicationSceneManifest_Generation = YES;
@@ -280,12 +282,14 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_ENTITLEMENTS = StepMap/StepMap.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_ASSET_PATHS = "\"StepMap/Preview Content\"";
 				DEVELOPMENT_TEAM = SSJBLTMP95;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_NSHealthShareUsageDescription = "We need to access your step length and walking speed to calculate metrics tailored to you";
 				INFOPLIST_KEY_NSLocationAlwaysAndWhenInUseUsageDescription = "We need to access your location to set starting point of your route";
 				INFOPLIST_KEY_NSLocationWhenInUseUsageDescription = "We need to access your location to set starting point of your route";
 				INFOPLIST_KEY_UIApplicationSceneManifest_Generation = YES;

StepMap/ContentView.swift

@@ -6,20 +6,25 @@
 //
 
 import CoreLocation
+import HealthKitUI
 import MapKit
 import SwiftUI
 
 struct ContentView: View {
     @ObservedObject var viewModel = ViewModel()
     @StateObject var locationManager = LocationManager()
+    @StateObject var healthKitManager = HealthKitManager()
 
     @State private var position = MapCameraPosition.automatic
     @State private var showSearch: Bool = true
     @State private var directions: [MKRoute] = []
+    @State var healthKitAccess = false
+    @State var stepLength: Double?
 
     // TODO: create a map
     // Add navigation to the map
     // after you click the navigation button, show the start and end place on the map with a tag or whatever it's called
+    // FIX: calling the directions too many times, wait till user is finished typing
     // add "cancel" button that will hide the route
     // add ability to hold on the map to place a mark (end goal)
     // Display the calculated distance and how long will it take by walking
@@ -38,11 +43,15 @@ struct ContentView: View {
         .sheet(
             isPresented: $showSearch,
             content: {
-                SearchView(directions: $directions, locationManager: locationManager)
+                SearchView(
+                    directions: $directions, stepLength: $stepLength,
+                    locationManager: locationManager
+                )
                 .ignoresSafeArea()
             }
         )
         .mapControls {
+            // TODO: make sure the user location stays on the map even if camera moves
             MapUserLocationButton()
                 .onTapGesture {
                     locationManager.requestAuthorization()
@@ -59,12 +68,11 @@ struct ContentView: View {
             if let userLocation = locationManager.location {
                 position = .camera(MapCamera(centerCoordinate: userLocation, distance: 1000))
             }
-
+            Task {
+                await healthKitManager.requestAccess()
+                stepLength = await healthKitManager.getStepLength()
+            }
         }
-        //        Text("This is what's set: \(viewModel.test)")
-        //        Button(action: {
-        //            save(value: "te5t3")
-        //        }, label: {Text("CLICK ME")})
     }
 
     func save(value: String) {

StepMap/Managers/HealthKitManager.swift

@@ -0,0 +1,53 @@
+//
+//  HealthKitManager.swift
+//  StepMap
+//
+//  Created by Oliver Hnát on 27.11.2024.
+//
+
+import Foundation
+import HealthKit
+
+class HealthKitManager: ObservableObject {
+    let healthStore = HKHealthStore()
+    let allTypes: Set = [
+        HKQuantityType(.walkingSpeed),
+        HKQuantityType(.walkingStepLength),
+    ]
+
+    var stepLength: Double?
+
+    func requestAccess() async {
+        do {
+            if HKHealthStore.isHealthDataAvailable() {
+                try await healthStore.requestAuthorization(toShare: Set(), read: allTypes)
+            }
+        } catch {
+            fatalError(
+                "Something went wrong while requesting healthKit permissions: \(error.localizedDescription)"
+            )
+        }
+    }
+
+    func getStepLength() async -> Double? {
+        if stepLength != nil {
+            return stepLength
+        }
+        let stepLengthType = HKQuantityType(.walkingStepLength)
+
+        let query = HKStatisticsQueryDescriptor(
+            predicate: HKSamplePredicate.quantitySample(type: stepLengthType),
+            options: .discreteAverage)
+        // maybe make an average of all the ones gotten in the last week?
+        do {
+            let results = try await query.result(for: healthStore)
+            stepLength = results?.averageQuantity()?.doubleValue(for: HKUnit.meter())
+            return stepLength
+        } catch {
+            fatalError(
+                "Something went wrong while getting step length from healthKit: \(error.localizedDescription)"
+            )
+        }
+    }
+
+}

StepMap/SearchItemView.swift

@@ -5,6 +5,8 @@
 //  Created by Oliver Hnát on 23.11.2024.
 //
 
+import HealthKit
+import HealthKitUI
 import MapKit
 import SwiftUI
 
@@ -12,6 +14,8 @@ struct SearchItemView: View {
     var location: MKMapItem
     @State var distance: CLLocationDistance?
     @Binding var directions: [MKRoute]
+    @Binding var stepLength: Double?
+    @Binding var showSteps: Bool
     @State var localDirections: [MKRoute] = []
 
     var body: some View {
@@ -54,9 +58,13 @@ struct SearchItemView: View {
                             }
                         }
                         if distance != nil {
+                            Button {
+                                self.showSteps.toggle()
+                            } label: {
                                 Text("\(formatDistance(distance: distance!))")
                             }
                         }
+                    }
                     Spacer()
                 }
             }
@@ -68,6 +76,15 @@ struct SearchItemView: View {
     }
 
     func formatDistance(distance: CLLocationDistance) -> String {
+        let steps = distance * (stepLength ?? 0)
+        if steps != 0 && showSteps {
+            let formatter = NumberFormatter()
+            formatter.maximumFractionDigits = 0
+            formatter.numberStyle = .decimal
+            let number = NSNumber(value: steps)
+            return formatter.string(from: number)! + " steps"
+            //            return String(format: "%.0f", steps)
+        }
         let distanceFormatter = MKDistanceFormatter()
         return distanceFormatter.string(fromDistance: distance)
     }
@@ -86,8 +103,7 @@ struct SearchItemView: View {
         let searchDirections = MKDirections(request: directionsRequest)
         searchDirections.calculate { (response, error) in
             guard let response = response else {
-                print(error ?? "")
+                print("Error while searching for directions: \(error?.localizedDescription ?? "")")
-                print("Error while searching for directions")
                 return
             }
             self.localDirections = response.routes

StepMap/SearchView.swift

@@ -9,9 +9,11 @@ import MapKit
 import SwiftUI
 
 struct SearchView: View {
-    @State private var query: String = "airport"
+    @State private var query: String = ""
     @State private var locations: [MKMapItem] = []
     @Binding var directions: [MKRoute]
+    @Binding var stepLength: Double?
+    @State var showSteps = true
     var locationManager: LocationManager
 
     var body: some View {
@@ -27,10 +29,10 @@ struct SearchView: View {
                             self.locations = []
                         }
                     }
-                    .onAppear {
+                    //                    .onAppear {
-                        // TODO: delete this, it's for debug only
+                    //                        // TODO: delete this, it's for debug only
-                        search(for: self.query)
+                    //                        search(for: self.query)
-                    }
+                    //                    }
                     .overlay {
                         HStack {
                             Spacer()
@@ -46,7 +48,9 @@ struct SearchView: View {
             Spacer()
             ScrollView {
                 ForEach(self.locations, id: \.identifier) { location in
-                    SearchItemView(location: location, directions: $directions)
+                    SearchItemView(
+                        location: location, directions: $directions, stepLength: $stepLength,
+                        showSteps: $showSteps)
                 }
             }
         }
@@ -65,7 +69,7 @@ struct SearchView: View {
         let search = MKLocalSearch(request: searchRequest)
         search.start { (response, error) in
             guard let response = response else {
-                print("ERROR")
+                print(error)
                 return
             }
             var items: [MKMapItem] = []
@@ -73,8 +77,6 @@ struct SearchView: View {
                 if let name = item.name,
                     let location = item.placemark.location
                 {
-                    print(
-                        "\(name): \(location.coordinate.latitude),\(location.coordinate.longitude)")
                     items.append(item)
                 }
             }

StepMap/StepMap.entitlements

@@ -0,0 +1,8 @@
+<?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>com.apple.developer.healthkit</key>
+	<true/>
+</dict>
+</plist>