Flush delta queue on start

Motivation: we need to flush the delta queue on start in order to immediately trigger updates that would return a RYW token so we can unblock IAM fetch as soon as possible.

Author: Rodrigo Gomez Palacio

iOS_SDK/OneSignalSDK/OneSignalOSCore/Source/OSOperationRepo.swift

@@ -35,6 +35,7 @@ import OneSignalCore
 public class OSOperationRepo: NSObject {
     public static let sharedInstance = OSOperationRepo()
     private var hasCalledStart = false
+    private var sessionCountDeltaQueued = false // used to know when to force-flush
 
     // The Operation Repo dispatch queue, serial. This synchronizes access to `deltaQueue` and flushing behavior.
     private let dispatchQueue = DispatchQueue(label: "OneSignal.OSOperationRepo", target: .global())
@@ -107,14 +108,19 @@ public class OSOperationRepo: NSObject {
      // TODO: We can make this method internal once there is no manual adding of a Delta except through stores.
      This can happen when session data and purchase data use the model / store / listener infrastructure.
      */
-    public func enqueueDelta(_ delta: OSDelta) {
+    public func enqueueDelta(_ delta: OSDelta, flush: Bool = false) {
         guard !OneSignalConfigManager.shouldAwaitAppIdAndLogMissingPrivacyConsent(forMethod: nil) else {
             return
         }
         start()
         self.dispatchQueue.async {
             OneSignalLog.onesignalLog(.LL_VERBOSE, message: "OSOperationRepo enqueueDelta: \(delta)")
             self.deltaQueue.append(delta)
+
+            if flush {
+                self.flushDeltaQueue()
+            }
+
             // Persist the deltas (including new delta) to storage
             OneSignalUserDefaults.initShared().saveCodeableData(forKey: OS_OPERATION_REPO_DELTA_QUEUE_KEY, withValue: self.deltaQueue)
         }

iOS_SDK/OneSignalSDK/OneSignalUser/Source/OneSignalUserManagerImpl.swift

@@ -583,7 +583,7 @@ extension OneSignalUserManagerImpl {
             property: property.rawValue,
             value: value
         )
-        OSOperationRepo.sharedInstance.enqueueDelta(delta)
+        OSOperationRepo.sharedInstance.enqueueDelta(delta, flush: true)
     }
 
     /// Time processors forward the session time to this method.