Check for unused files in output folder

CHDataManagement/Storage/Storage.swift

@@ -45,6 +45,8 @@ final class Storage: ObservableObject {
 
     var errorNotification: StorageErrorCallback?
 
+    var writeNotification: ((String) -> Void)?
+
     /**
      Create the storage.
      */
@@ -319,6 +321,7 @@ final class Storage: ObservableObject {
      */
     func copy(file fileId: String, to relativeOutputPath: String) -> Bool {
         guard let contentScope, let outputScope else { return false }
+        didWrite(outputFile: relativeOutputPath)
         return contentScope.transfer(
             file: filePath(file: fileId),
             to: relativeOutputPath, of: outputScope)
@@ -460,6 +463,7 @@ final class Storage: ObservableObject {
     @discardableResult
     func write(_ content: String, to relativeOutputPath: String) -> Bool {
         guard let outputScope else { return false }
+        didWrite(outputFile: relativeOutputPath)
         return outputScope.write(content, to: relativeOutputPath)
     }
 
@@ -468,6 +472,7 @@ final class Storage: ObservableObject {
      */
     func write(_ data: Data, to relativeOutputPath: String) -> Bool {
         guard let outputScope else { return false }
+        didWrite(outputFile: relativeOutputPath)
         return outputScope.write(data, to: relativeOutputPath)
     }
 
@@ -584,4 +589,15 @@ final class Storage: ObservableObject {
         }
         return true
     }
+
+    // MARK: Output notifications
+
+    func didWrite(outputFile: String) {
+        writeNotification?(outputFile)
+    }
+
+    func getAllOutputFiles() -> Set<String> {
+        guard let outputScope else { return [] }
+        return outputScope.getAllFiles()
+    }
 }