Add input status handler

Author: andrewjl-mux

Sources/MuxUploadSDK/InternalUtilities/UploadInput.swift

@@ -80,6 +80,10 @@ struct UploadInput {
     }
 }
 
+extension UploadInput.Status: Equatable {
+
+}
+
 extension UploadInput {
     init(asset: AVAsset) {
         self.status = .ready(asset)

Sources/MuxUploadSDK/PublicAPI/MuxUpload.swift

@@ -50,7 +50,13 @@ public typealias UploadResult = Result<MuxUpload.Success, MuxUpload.UploadError>
 public final class MuxUpload : Hashable, Equatable {
 
     private var options: UploadOptions
-    private var input: UploadInput
+    private var input: UploadInput {
+        didSet {
+            if oldValue.status != input.status {
+                inputStatusHandler?(inputStatus)
+            }
+        }
+    }
 
     private var internalStatus: UploadInput.Status {
         input.status
@@ -129,6 +135,16 @@ public final class MuxUpload : Hashable, Equatable {
         }
     }
 
+    /**
+     Handles a change in the input status of the upload
+     */
+    public typealias InputStatusHandler = (InputStatus) -> ()
+
+    /**
+     If set will be notified of a change to a new input status
+     */
+    public var inputStatusHandler: InputStatusHandler?
+
     private let manageBySDK: Bool
     private let id: Int
 

Sources/MuxUploadSDK/Upload/UploadInfo.swift

@@ -34,6 +34,10 @@ struct UploadInfo : Codable {
     var optOutOfEventTracking: Bool
 }
 
+extension UploadInfo: Equatable {
+    
+}
+
 extension UploadInfo {
 
     init(