first commit

node_modules/expo-file-system/ios/FilePickingHandler.swift

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+// UIKit is unavailable on macOS, so platform checks are necessary.
+// For macOS support, we should consider using NSOpenPanel: https://developer.apple.com/documentation/appkit/nsopenpanel
+// UIDocumentPickerViewController is unavailable on tvOS
+#if os(iOS)
+import ExpoModulesCore
+import UIKit
+
+internal class FilePickingHandler: FilePickingResultHandler {
+  private weak var module: FileSystemModule?
+  internal var filePickingContext: FilePickingContext?
+
+  init(module: FileSystemModule) {
+    self.module = module
+  }
+
+  func presentDocumentPicker(
+    picker: UIDocumentPickerViewController,
+    isDirectory: Bool,
+    initialUri: URL?,
+    mimeType: String?,
+    promise: Promise
+  ) {
+    guard let module = module else {
+      promise.reject(MissingViewControllerException())
+      return
+    }
+
+    if filePickingContext != nil {
+      promise.reject(PickingInProgressException())
+      return
+    }
+
+    guard let currentVc = module.appContext?.utilities?.currentViewController() else {
+      promise.reject(MissingViewControllerException())
+      return
+    }
+
+    let pickerDelegate = FilePickingDelegate(resultHandler: self, isDirectory: isDirectory)
+    filePickingContext = FilePickingContext(
+      promise: promise,
+      initialUri: initialUri,
+      mimeType: mimeType,
+      isDirectory: isDirectory,
+      delegate: pickerDelegate
+    )
+
+    picker.delegate = pickerDelegate
+    picker.presentationController?.delegate = pickerDelegate
+    picker.allowsMultipleSelection = false
+
+    if UIDevice.current.userInterfaceIdiom == .pad {
+      let viewFrame = currentVc.view.frame
+      picker.popoverPresentationController?.sourceRect = CGRect(
+        x: viewFrame.midX,
+        y: viewFrame.maxY,
+        width: 0,
+        height: 0
+      )
+      picker.popoverPresentationController?.sourceView = currentVc.view
+      picker.modalPresentationStyle = .pageSheet
+    }
+
+    currentVc.present(picker, animated: true)
+  }
+
+  func didPickFileAt(url: URL) {
+    handlePickingResult { context in
+      let file = FileSystemFile(url: url)
+      context.promise.resolve(file)
+    }
+  }
+
+  func didPickDirectoryAt(url: URL) {
+    handlePickingResult { context in
+      let directory = FileSystemDirectory(url: url)
+      context.promise.resolve(directory)
+    }
+  }
+
+  func didCancelPicking() {
+    handlePickingResult { context in
+      context.promise.reject(FilePickingCancelledException())
+    }
+  }
+
+  private func handlePickingResult(_ handler: (FilePickingContext) -> Void) {
+    guard let context = filePickingContext else {
+      return
+    }
+    filePickingContext = nil
+
+    handler(context)
+  }
+}
+#endif