Add method getMessage(withId id: String) to IterableInAppManagerProtocol

Author: tapashmajumder

swift-sdk/Internal/EmptyInAppManager.swift

@@ -38,6 +38,10 @@ class EmptyInAppManager: IterableInternalInAppManagerProtocol {
 
     func set(read _: Bool, forMessage _: IterableInAppMessage) {}
 
+    func getMessage(withId _: String) -> IterableInAppMessage? {
+        return nil
+    }
+    
     func getUnreadInboxMessagesCount() -> Int {
         return 0
     }

swift-sdk/Internal/InAppManager.swift

@@ -182,6 +182,10 @@ class InAppManager: NSObject, IterableInternalInAppManagerProtocol {
         }
     }
 
+    func getMessage(withId id: String) -> IterableInAppMessage? {
+        return messagesMap[id]
+    }
+    
     func isOkToShowNow(message: IterableInAppMessage) -> Bool {
         guard message.didProcessTrigger == false else {
             ITBInfo("message with id: \(message.messageId) is already processed")

swift-sdk/IterableMessaging.swift

@@ -48,6 +48,10 @@ import UIKit
     /// - parameter read: Whether this inbox message was read
     /// - parameter message: The inbox message
     @objc(setRead:forMessage:) func set(read: Bool, forMessage message: IterableInAppMessage)
+    
+    /// - parameter id: The id of the message
+    /// - returns: IterableInAppMessage with the id, if it exists.
+    @objc(getMessageWithId:) func getMessage(withId id: String) -> IterableInAppMessage?
 }
 
 /// Iterable Notification names