Show classifier download progress

Caps.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		882C955E2AE7F0DE00657886 /* ClassifierDownloadView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 882C955D2AE7F0DE00657886 /* ClassifierDownloadView.swift */; };
 		88C1511C29A11ADF0080EF4F /* CapImagesView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88C1511B29A11ADF0080EF4F /* CapImagesView.swift */; };
 		88DBE72E285495B100D1573B /* FancyTextField.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88DBE72D285495B100D1573B /* FancyTextField.swift */; };
 		E20D104A285612AF0019BD91 /* ImageGrid.swift in Sources */ = {isa = PBXBuildFile; fileRef = E20D1049285612AF0019BD91 /* ImageGrid.swift */; };
@@ -52,6 +53,7 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
+		882C955D2AE7F0DE00657886 /* ClassifierDownloadView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ClassifierDownloadView.swift; sourceTree = "<group>"; };
 		88C1511B29A11ADF0080EF4F /* CapImagesView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CapImagesView.swift; sourceTree = "<group>"; };
 		88DBE72D285495B100D1573B /* FancyTextField.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FancyTextField.swift; sourceTree = "<group>"; };
 		E20D1049285612AF0019BD91 /* ImageGrid.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ImageGrid.swift; sourceTree = "<group>"; };
@@ -192,6 +194,7 @@
 				E2EA00CD283EBEB600F7B269 /* SearchField.swift */,
 				E2EA00E4283F69DF00F7B269 /* SettingsStatisticRow.swift */,
 				E2EA00E0283F658E00F7B269 /* SettingsView.swift */,
+				882C955D2AE7F0DE00657886 /* ClassifierDownloadView.swift */,
 				E2EA00CB283EB43E00F7B269 /* SortCaseRowView.swift */,
 				E2EA00C6283EAA0100F7B269 /* SortSelectionView.swift */,
 				88C1511B29A11ADF0080EF4F /* CapImagesView.swift */,
@@ -245,7 +248,7 @@
 			attributes = {
 				BuildIndependentTargetsInParallel = 1;
 				LastSwiftUpdateCheck = 1340;
-				LastUpgradeCheck = 1340;
+				LastUpgradeCheck = 1500;
 				TargetAttributes = {
 					E25AAC77283D855D006E9E7F = {
 						CreatedOnToolsVersion = 13.4;
@@ -327,6 +330,7 @@
 				E20D105028574E190019BD91 /* CapImage.swift in Sources */,
 				E2EA00ED2841170100F7B269 /* UIImage+Extensions.swift in Sources */,
 				E20D105228589AAC0019BD91 /* FileManager+Extensions.swift in Sources */,
+				882C955E2AE7F0DE00657886 /* ClassifierDownloadView.swift in Sources */,
 				E2EA00E5283F69DF00F7B269 /* SettingsStatisticRow.swift in Sources */,
 				E2EA00E1283F658E00F7B269 /* SettingsView.swift in Sources */,
 			);
@@ -371,6 +375,7 @@
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -431,6 +436,7 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;

Caps.xcodeproj/xcshareddata/xcschemes/Caps.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1340"
+   LastUpgradeVersion = "1500"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Caps/ContentView.swift

@@ -288,7 +288,7 @@ struct ContentView: View {
         }
         .alert(isPresented: $showNewClassifierAlert) {
             Alert(title: Text("New classifier available"),
-                  message: Text("Classifier \(database.serverClassifierVersion) is available. You have version \(database.classifierVersion). Do you want to download it now?"),
+                  message: Text("Classifier \(database.serverClassifierVersion) is available. You have version \(database.localClassifierVersion). Do you want to download it now?"),
                   primaryButton: .default(Text("Download"), action: downloadClassifier),
                   secondaryButton: .cancel())
         }
@@ -329,8 +329,8 @@ struct ContentView: View {
     private func refresh() {
         Task {
             await database.downloadCaps()
-            let hasNewClassifier = await database.serverHasNewClassifier()
+            await database.updateServerClassifierVersion()
-            guard hasNewClassifier else {
+            guard database.hasNewClassifier else {
                 return
             }
             DispatchQueue.main.async {

Caps/Data/Database.swift

@@ -8,11 +8,28 @@ final class Database: ObservableObject {
     private let imageCompressionQuality: CGFloat = 0.3
 
     @AppStorage("classifier")
-    private(set) var classifierVersion = 0
+    private var storedLocalClassifierVersion = 0 {
+        didSet { localClassifierVersion = storedLocalClassifierVersion }
+    }
 
     @AppStorage("serverClassifier")
+    private var storedServerClassifierVersion = 0 {
+        didSet { serverClassifierVersion = storedServerClassifierVersion }
+    }
+    
+    @Published
+    private(set) var localClassifierVersion = 0
+    
+    @Published
     private(set) var serverClassifierVersion = 0
     
+    @Published
+    private(set) var classifierDownloadProgress: ClassifierProgress?
+    
+    var hasNewClassifier: Bool {
+        serverClassifierVersion > localClassifierVersion
+    }
+
     let images: ImageCache
 
     private let encoder = JSONEncoder()
@@ -147,6 +164,9 @@ final class Database: ObservableObject {
             server: server,
             thumbnailSize: CapsApp.thumbnailImageSize)
         
+        self.localClassifierVersion = storedLocalClassifierVersion
+        self.serverClassifierVersion = storedServerClassifierVersion
+
         ensureFolderExistence(gridStorageFolder)
         loadCaps()
     }
@@ -329,7 +349,7 @@ final class Database: ObservableObject {
     }
 
     @discardableResult
-    func serverHasNewClassifier() async -> Bool {
+    func updateServerClassifierVersion() async -> Bool {
         let data: Data
         let response: URLResponse
         do {
@@ -351,23 +371,29 @@ final class Database: ObservableObject {
             return false
         }
         DispatchQueue.main.async {
-            self.serverClassifierVersion = serverVersion
+            self.storedServerClassifierVersion = serverVersion
         }
-        guard serverVersion > self.classifierVersion else {
-            log("No new classifier available (Local: \(classifierVersion) Server: \(serverVersion))")
-            return false
-        }
-        log("New classifier available (Local: \(classifierVersion) Server: \(serverVersion))")
         return true
     }
 
     @discardableResult
     func downloadClassifier() async -> Bool {
         log("Downloading classifier")
+        
+        let progress = ClassifierProgress()
+        DispatchQueue.main.async {
+            self.classifierDownloadProgress = progress
+        }
+        defer {
+            DispatchQueue.main.async {
+                self.classifierDownloadProgress = nil
+            }
+        }
+        
         let tempUrl: URL
         let response: URLResponse
         do {
-            (tempUrl, response) = try await URLSession.shared.download(from: serverClassifierUrl)
+            (tempUrl, response) = try await URLSession.shared.download(from: serverClassifierUrl, delegate: progress)
         } catch {
             log("Failed to download classifier version: \(error)")
             return false
@@ -386,10 +412,10 @@ final class Database: ObservableObject {
             return false
         }
         DispatchQueue.main.async {
-            self.classifierVersion = self.serverClassifierVersion
+            self.storedLocalClassifierVersion = self.serverClassifierVersion
+            log("Downloaded classifier \(self.localClassifierVersion)")
             self.classifier = nil
         }
-        log("Downloaded classifier \(classifierVersion)")
         return true
     }
     
@@ -987,6 +1013,44 @@ final class Database: ObservableObject {
     }
 }
 
+extension Database {
+    
+    final class ClassifierProgress: NSObject, ObservableObject {
+        
+        @Published
+        var bytesLoaded: Double
+        
+        @Published
+        var total: Double
+        
+        var percentage: Double {
+            guard total > 0 else {
+                return 0.0
+            }
+            return bytesLoaded * 100 / total
+        }
+        
+        init(bytesLoaded: Double = 0, total: Double = 0) {
+            self.bytesLoaded = bytesLoaded
+            self.total = total
+        }
+    }
+}
+
+extension Database.ClassifierProgress: URLSessionDownloadDelegate {
+    
+    func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
+        
+    }
+    
+    func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didWriteData bytesWritten: Int64, totalBytesWritten: Int64, totalBytesExpectedToWrite: Int64) {
+        DispatchQueue.main.async {
+            self.bytesLoaded = Double(totalBytesWritten)
+            self.total = Double(totalBytesExpectedToWrite)
+        }
+    }
+}
+
 extension Database {
 
     static var mock: Database {

Caps/Views/ClassifierDownloadView.swift

@@ -0,0 +1,23 @@
+import SwiftUI
+
+struct ClassifierDownloadView: View {
+    
+    @ObservedObject
+    var progress: Database.ClassifierProgress
+    
+    var body: some View {
+        VStack {
+            ProgressView("Downloading classifier...", value: progress.bytesLoaded, total: Double(progress.total))
+                .progressViewStyle(.linear)
+            HStack {
+                Text(String(format: "%.0f %%", progress.percentage))
+                Spacer()
+                Text(String(format: "%.1f / %.1f MB", progress.bytesLoaded / 1_000_000, progress.total / 1_000_000 ))
+            }
+        }
+    }
+}
+
+#Preview {
+    ClassifierDownloadView(progress: .init(bytesLoaded: 12_300_000, total: 24_500_000))
+}

Caps/Views/SettingsView.swift

@@ -42,8 +42,28 @@ struct SettingsView: View {
                     .foregroundColor(.secondary)
                     .padding(.top)
                 Group {
-                    SettingsStatisticRow(label: "Version", value: "\(database.classifierVersion)")
+                    SettingsStatisticRow(label: "Server Version", value: "\(database.serverClassifierVersion)")
+                    SettingsStatisticRow(label: "Local Version", value: "\(database.localClassifierVersion)")
                     SettingsStatisticRow(label: "Recognized caps", value: "\(database.classifierClassCount)")
+                    HStack {
+                        Spacer()
+                        Button(action: updateClassifierVersion) {
+                            Label("Refresh", systemSymbol: .arrowCounterclockwise)
+                        }
+                        .disabled(database.classifierDownloadProgress != nil)
+                        .padding()
+                        if database.localClassifierVersion != database.serverClassifierVersion {
+                            Button(action: downloadNewClassifier) {
+                                Label("Download", systemSymbol: .squareAndArrowDown)
+                            }
+                            .disabled(database.classifierDownloadProgress != nil)
+                            .padding()
+                        }
+                        Spacer()
+                    }
+                    if let progress = database.classifierDownloadProgress {
+                        ClassifierDownloadView(progress: progress)
+                    }
                 }.padding(.horizontal)
                 Text("Storage")
                     .font(.footnote)
@@ -56,7 +76,9 @@ struct SettingsView: View {
                     SettingsStatisticRow(label: "Classifier", value: byteString(database.classifierSize))
                     HStack {
                         Spacer()
-                        Button("Clear image cache", action: clearImageCache)
+                        Button(action: clearImageCache) {
+                            Label("Clear image cache", systemSymbol: .trash)
+                        }
                             .padding()
                         Spacer()
                     }
@@ -82,6 +104,20 @@ struct SettingsView: View {
         }
     }
     
+    private func downloadNewClassifier() {
+        Task {
+            // Ensure that correct version is saved
+            await database.updateServerClassifierVersion()
+            await database.downloadClassifier()
+        }
+    }
+    
+    private func updateClassifierVersion() {
+        Task {
+            await database.updateServerClassifierVersion()
+        }
+    }
+    
     private func hide() {
         isPresented = false
     }