feat: show global subdirectory size in properties screen (fixes #301)

Author: pixelspark

Localizable.xcstrings

@@ -24876,6 +24876,46 @@
         }
       }
     },
+    "Subdirectory size" : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Unterverzeichnisgröße"
+          }
+        },
+        "es" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Tamaño del subdirectorio"
+          }
+        },
+        "it" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Dimensione sottodirectory"
+          }
+        },
+        "nl" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Omvang submap"
+          }
+        },
+        "uk" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Розмір підкаталогу"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "子目录大小"
+          }
+        }
+      }
+    },
     "Subpath" : {
       "localizations" : {
         "de" : {

Sushitrain/FileView.swift

@@ -28,6 +28,7 @@ struct FileView: View {
 	@State private var openWithAppURL: URL? = nil
 	@State private var localPath: String? = nil
 	@State private var showArchive: Bool = false
+	@State private var subdirectorySizeBytes: Int64? = nil
 
 	@Environment(AppState.self) private var appState
 	@Environment(\.dismiss) private var dismiss
@@ -60,6 +61,10 @@ struct FileView: View {
 						Text("File size").badge(Self.formatter.string(fromByteCount: file.size()))
 					}
 
+					if let subDirSize = self.subdirectorySizeBytes, file.isDirectory() {
+						Text("Subdirectory size").badge(Self.formatter.string(fromByteCount: subDirSize))
+					}
+
 					if let md = file.modifiedAt()?.date(), !file.isSymlink() {
 						Text("Last modified").badge(md.formatted(date: .abbreviated, time: .shortened))
 
@@ -291,6 +296,10 @@ struct FileView: View {
 				self.downloaderSheet()
 			}
 
+			.sheet(isPresented: $showEncryptionSheet) {
+				EncryptionView(entry: self.file)
+			}
+
 			.toolbar {
 				// Next/previous buttons
 				if let selfIndex = selfIndex, let siblings = siblings {
@@ -328,14 +337,14 @@ struct FileView: View {
 				#endif
 			}
 
-			.sheet(isPresented: $showEncryptionSheet) {
-				EncryptionView(entry: self.file)
-			}
-
 			.onAppear {
 				selfIndex = self.siblings?.firstIndex(of: file)
 			}
 
+			.task {
+				await self.update()
+			}
+
 			.onChange(of: file, initial: true) { _, _ in
 				self.fullyAvailableOnDevices = nil
 				self.update()
@@ -347,6 +356,24 @@ struct FileView: View {
 		}
 	}
 
+	private func update() async {
+		self.subdirectorySizeBytes = nil
+		let file = self.file
+		self.subdirectorySizeBytes = await Task.detached {
+			if file.isDirectory() {
+				var size: Int64 = 0
+				do {
+					try file.recursiveSize(&size)
+					return size
+				}
+				catch {
+					Log.warn("could not calculate subdirectory size: \(error.localizedDescription)")
+				}
+			}
+			return nil
+		}.value
+	}
+
 	@ViewBuilder private func zipButton() -> some View {
 		Button("Explore archive contents", systemImage: "doc.zipper") {
 			self.showArchive = true

SushitrainCore/src/entry.go

@@ -91,6 +91,26 @@ func (entry *Entry) Size() int64 {
 	return entry.info.FileSize()
 }
 
+func (entry *Entry) RecursiveSize() (int64, error) {
+	if !entry.IsDirectory() {
+		return entry.Size(), nil
+	}
+
+	prefix := entry.Path() + "/"
+	leaves, err := entry.Folder.listEntries(prefix, false, true)
+	if err != nil {
+		return 0, err
+	}
+
+	var size int64 = 0
+	err = walkEntries(entry.Path(), leaves, func(leafPrefix string, leaf *model.TreeEntry) (bool, error) {
+		size += leaf.Size
+		return true, nil
+	})
+
+	return size, err
+}
+
 func (entry *Entry) IsDeleted() bool {
 	return entry.info.IsDeleted()
 }