Check for unused files in output folder

CHDataManagement/Storage/SecurityBookmark.swift

@@ -388,6 +388,36 @@ struct SecurityBookmark {
         return operation(url)
     }
 
+    func getAllFiles() -> Set<String> {
+        guard url.startAccessingSecurityScopedResource() else {
+            reportError("Failed to start security scope")
+            return []
+        }
+        guard let enumerator = FileManager.default.enumerator(at: url, includingPropertiesForKeys: nil, options: [.skipsHiddenFiles]) else {
+            reportError("Failed to get folder enumerator")
+            return []
+        }
+
+        var relativePaths = Set<String>()
+        let prefix = url.path().withTrailingSlash
+
+        for case let fileURL as URL in enumerator {
+            guard !fileURL.hasDirectoryPath else {
+                continue
+            }
+            let fullPath = fileURL.path()
+            guard fullPath.hasPrefix(prefix) else {
+                print("Expected prefix \(prefix) for \(fullPath)")
+                return []
+            }
+            let relativePath = fullPath.replacingOccurrences(of: prefix, with: "")
+            relativePaths.insert(relativePath)
+        }
+
+        url.stopAccessingSecurityScopedResource()
+        return relativePaths
+    }
+
     // MARK: Unscoped helpers
 
     private func create(folder: URL) -> Bool {

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()
+    }
 }