CS1-119: iOS: Ability to Pause HealthKit Synchronization

tryVital · Feb 6, 2024 · faa7a4e · faa7a4e
1 parent f99cacc
commit faa7a4e
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diff --git a/Examples/iOS/HealthKit Tab/HealthKitExample.swift b/Examples/iOS/HealthKit Tab/HealthKitExample.swift
@@ -5,6 +5,7 @@ import VitalCore
 
 struct HealthKitExample: View {
   @State var permissions: [VitalResource: Bool] = [:]
+  @State var pauseSync = VitalHealthKitClient.shared.pauseSynchronization
 
   var body: some View {
     NavigationView {
@@ -36,6 +37,8 @@ struct HealthKitExample: View {
           }
           .buttonStyle(PlainButtonStyle())
         }
+
+        Toggle(isOn: $pauseSync) { Text("Pause Synchronization") }
 
         Button("Add water 1L") {
           Task {
@@ -66,6 +69,9 @@ struct HealthKitExample: View {
           }
         )
       }
+      .onChange(of: self.pauseSync) { pauseSync in
+        VitalHealthKitClient.shared.pauseSynchronization = pauseSync
+      }
     }
   }
 }

diff --git a/Sources/VitalHealthKit/HealthKit/Storage/VitalHealthKitStorage.swift b/Sources/VitalHealthKit/HealthKit/Storage/VitalHealthKitStorage.swift
@@ -11,6 +11,7 @@ class VitalHealthKitStorage {
   private let flag = "vital_anchor_"
 
   private let initialSyncDone = "initial_sync_done"
+  private let pauseSync = "pause_sync"
 
   private let storage: VitalBackStorage
 
@@ -43,6 +44,15 @@ class VitalHealthKitStorage {
     let anchor = self.read(key: key)
     return anchor?.vitalAnchors == nil && anchor?.date == nil && anchor?.anchor == nil
   }
+
+  func shouldPauseSynchronization() -> Bool {
+    // Default is nil; so this evaluate to false
+    return storage.read(pauseSync) == Data([0x01])
+  }
+
+  func setPauseSynchronization(_ newValue: Bool) {
+    storage.store(Data([newValue ? 0x01 : 0x0]), pauseSync)
+  }
 
   func store(entity: StoredAnchor) {
     let anchorPrefix = anchorPrefix + entity.key

diff --git a/Sources/VitalHealthKit/HealthKit/VitalHealthKitClient.swift b/Sources/VitalHealthKit/HealthKit/VitalHealthKitClient.swift
@@ -528,6 +528,7 @@ extension VitalHealthKitClient {
   private func sync(
     payload: SyncPayload
   ) async {
+    guard self.pauseSynchronization == false else { return }
 
     let configuration = await configuration.get()
     let startDate: Date = .dateAgo(days: configuration.numberOfDaysToBackFill)
@@ -713,6 +714,22 @@ extension VitalHealthKitClient {
   }
 }
 
+extension VitalHealthKitClient {
+  /// Pause all synchronization, both automatic syncs and any manual `syncData(_:)` calls.
+  public var pauseSynchronization: Bool {
+    get { self.storage.shouldPauseSynchronization() }
+    set {
+      let oldValue = self.storage.shouldPauseSynchronization()
+      self.storage.setPauseSynchronization(newValue)
+
+      // Auto-trigger an asynchronous sync when we un-pause.
+      if oldValue && !newValue {
+        self.syncData()
+      }
+    }
+  }
+}
+
 func transform(data: ProcessedResourceData, calendar: Calendar) -> ProcessedResourceData {
   switch data {
     case .summary(.activity):