add iOS config for in memory in-app use

Author: roninopf

swift-sdk/Internal/DependencyContainer.swift

@@ -138,9 +138,19 @@ struct DependencyContainer: DependencyContainerProtocol {
     let notificationStateProvider: NotificationStateProviderProtocol = SystemNotificationStateProvider()
     let localStorage: LocalStorageProtocol = LocalStorage()
     let inAppDisplayer: InAppDisplayerProtocol = InAppDisplayer()
-    let inAppPersister: InAppPersistenceProtocol = InAppFilePersister()
+    let inAppPersister: InAppPersistenceProtocol
     let urlOpener: UrlOpenerProtocol = AppUrlOpener()
     let applicationStateProvider: ApplicationStateProviderProtocol = AppExtensionHelper.applicationStateProvider
     let notificationCenter: NotificationCenterProtocol = NotificationCenter.default
     let apnsTypeChecker: APNSTypeCheckerProtocol = APNSTypeChecker()
+    
+    init(_ config: IterableConfig? = nil) {
+        if let config = config, config.useInMemoryStorageForInApps {
+            FileHelper.delete(filename: "itbl_inapp", ext: "json")
+            
+            self.inAppPersister = InAppInMemoryPersister()
+        } else {
+            self.inAppPersister = InAppFilePersister()
+        }
+    }
 }

swift-sdk/Internal/InAppPersistence.swift

@@ -365,6 +365,20 @@ protocol InAppPersistenceProtocol {
     func clear()
 }
 
+class InAppInMemoryPersister: InAppPersistenceProtocol {
+    func getMessages() -> [IterableInAppMessage] {
+        []
+    }
+    
+    func persist(_ messages: [IterableInAppMessage]) {
+        return
+    }
+    
+    func clear() {
+        return
+    }
+}
+
 class InAppFilePersister: InAppPersistenceProtocol {
     init(filename: String = "itbl_inapp", ext: String = "json") {
         self.filename = filename

swift-sdk/IterableConfig.swift

@@ -120,4 +120,7 @@ public class IterableConfig: NSObject {
     /// We allow navigation only to urls with `https` protocol (for deep links within your app or external links).
     /// If you want to allow other protocols, such as,  `http`, `tel` etc., please add them to the list below
     public var allowedProtocols: [String] = []
+    
+    /// Set whether the SDK should store in-apps only in memory, or in file storage
+    public var useInMemoryStorageForInApps = false
 }