feat: download checksum

PlayCover.xcodeproj/project.pbxproj

@@ -83,6 +83,7 @@
 		B6603E1328E2257800DEFA3F /* Uninstaller.swift in Sources */ = {isa = PBXBuildFile; fileRef = B6603E1228E2257800DEFA3F /* Uninstaller.swift */; };
 		B6825C3528F3D23600E3015A /* InstallSettings.swift in Sources */ = {isa = PBXBuildFile; fileRef = B6825C3428F3D23600E3015A /* InstallSettings.swift */; };
 		B6AB53C929232B4F00039B2E /* KeyCodeNames.swift in Sources */ = {isa = PBXBuildFile; fileRef = B6AB53C829232B4F00039B2E /* KeyCodeNames.swift */; };
+		B6ABDA2A2971EEF700A46E80 /* ProgressVM.swift in Sources */ = {isa = PBXBuildFile; fileRef = B6ABDA292971EEF700A46E80 /* ProgressVM.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -186,6 +187,7 @@
 		B6603E1228E2257800DEFA3F /* Uninstaller.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Uninstaller.swift; sourceTree = "<group>"; };
 		B6825C3428F3D23600E3015A /* InstallSettings.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InstallSettings.swift; sourceTree = "<group>"; };
 		B6AB53C829232B4F00039B2E /* KeyCodeNames.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KeyCodeNames.swift; sourceTree = "<group>"; };
+		B6ABDA292971EEF700A46E80 /* ProgressVM.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ProgressVM.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -305,6 +307,7 @@
 				6E66B0BE289DE6240099B907 /* StoreVM.swift */,
 				6E66B0D828A135360099B907 /* ToastVM.swift */,
 				53F4D29F26C43C690020167C /* Log.swift */,
+				B6ABDA292971EEF700A46E80 /* ProgressVM.swift */,
 			);
 			path = ViewModel;
 			sourceTree = "<group>";
@@ -672,6 +675,7 @@
 				53F4D29E26C43C040020167C /* UserIntentFlow.swift in Sources */,
 				6E66B0BF289DE6240099B907 /* StoreVM.swift in Sources */,
 				B6603E1328E2257800DEFA3F /* Uninstaller.swift in Sources */,
+				B6ABDA2A2971EEF700A46E80 /* ProgressVM.swift in Sources */,
 				AA71964B287A0EA800623C15 /* PlayRules.swift in Sources */,
 				6E66B0D928A135360099B907 /* ToastVM.swift in Sources */,
 				53F5E74326C1D37E005AED1D /* FileExtensions.swift in Sources */,

PlayCover/AppInstaller/Downloader.swift

@@ -6,6 +6,7 @@
 //
 
 import Foundation
+import CryptoKit
 import DownloadManager
 
 /// DownloaderManager can be configured through this struct, default values are as the same as below
@@ -37,7 +38,7 @@ class DownloadApp {
 
     func start() {
         if !NetworkVM.isConnectedToNetwork() { return }
-        if installVM.installing {
+        if installVM.inProgress {
             Log.shared.error(PlayCoverError.waitInstallation)
         } else {
             if let warningMessage = warning {
@@ -53,25 +54,61 @@ class DownloadApp {
 
                 if alert.runModal() == .alertSecondButtonReturn {
                     return
-                } else {
-                    proceedDownload()
                 }
-            } else {
-                proceedDownload()
             }
+
+            proceedDownload()
         }
     }
 
     func cancel() {
         downloader.cancelAllDownloads()
-        downloadVM.downloading = false
-        downloadVM.progress = 0
+
+        downloadVM.next(.canceled, 0.95, 1.0)
         downloadVM.storeAppData = nil
     }
 
+    private func checksumAlert(originalSum: String, givenSum: String, completion: @escaping(Bool) -> Void) {
+        Task { @MainActor in
+            let alert = NSAlert()
+            alert.messageText = NSLocalizedString("playapp.download.differentChecksum", comment: "")
+            alert.informativeText = String(
+                format: NSLocalizedString("playapp.download.differentChecksumDesc", comment: ""),
+                arguments: [originalSum, givenSum]
+            )
+            alert.alertStyle = .warning
+            alert.addButton(withTitle: NSLocalizedString("button.Proceed", comment: ""))
+            alert.addButton(withTitle: NSLocalizedString("button.Cancel", comment: ""))
+
+            completion(alert.runModal() == .alertFirstButtonReturn)
+        }
+    }
+
+    private func verifyChecksum(checksum: String?, file: URL?, completion: @escaping(Bool) -> Void) {
+        Task {
+            if let originalSum = self.downloadVM.storeAppData?.checksum, !originalSum.isEmpty, let fileURL = file {
+                do {
+                    let sha256 = SHA256.hash(data: try Data(contentsOf: fileURL))
+                                       .map { String(format: "%02hhx", $0) }
+                                       .joined()
+
+                    if originalSum != sha256 {
+                        checksumAlert(originalSum: originalSum, givenSum: sha256, completion: completion)
+                        return
+                    }
+                } catch {
+                    print("Error in calculating sha256sum: \(error)")
+                }
+            }
+
+            completion(true)
+        }
+    }
+
     private func proceedDownload() {
         self.downloadVM.storeAppData = self.app
-        self.downloadVM.downloading = true
+        self.downloadVM.next(.downloading, 0.0, 0.7)
+
         var tmpDir: URL?
         do {
             tmpDir = try FileManager.default.url(for: .itemReplacementDirectory,
@@ -84,17 +121,26 @@ class DownloadApp {
                 // progress is a Float
                 self.downloadVM.progress = Double(progress)
             }, onCompletion: { error, fileURL in
+                self.downloadVM.next(.integrity, 0.7, 0.95)
+
                 guard error == nil else {
-                    self.downloadVM.downloading = false
-                    self.downloadVM.progress = 0
+                    self.downloadVM.next(.failed, 0.95, 1.0)
                     self.downloadVM.storeAppData = nil
                     return Log.shared.error(error!)
                 }
-                self.downloadVM.downloading = false
-                self.downloadVM.progress = 0
-                self.proceedInstall(fileURL)
+
+                self.verifyChecksum(checksum: self.downloadVM.storeAppData?.checksum, file: fileURL) { completing in
+                    self.downloadVM.next(completing ? .finish : .failed, 0.95, 1.0)
+                    if completing {
+                        Task { @MainActor in
+                            self.proceedInstall(fileURL)
+                        }
+                    }
+                }
             })
         } catch {
+            self.downloadVM.next(.failed, 0.95, 1.0)
+
             if let tmpDir = tmpDir {
                 FileManager.default.delete(at: tmpDir)
             }

PlayCover/ViewModel/DownloadVM.swift

@@ -7,10 +7,21 @@
 
 import Foundation
 
-class DownloadVM: ObservableObject {
-    @Published var progress: Double = 0
-    @Published var downloading = false
+enum DownloadStepsNative: String {
+    case downloading = "playapp.download.downloading",
+         integrity = "playapp.download.integrityCheck",
+         finish = "playapp.progress.finished",
+         failed = "playapp.progress.failed",
+         canceled = "playapp.progress.canceled"
+}
+
+class DownloadVM: ProgressVM<DownloadStepsNative> {
     @Published var storeAppData: StoreAppData?
 
     static let shared = DownloadVM()
+
+    init() {
+        super.init(start: .downloading, ends: [.finish, .failed, .canceled])
+    }
+
 }

PlayCover/ViewModel/InstallVM.swift

@@ -12,35 +12,16 @@ enum InstallStepsNative: String {
          sign = "playapp.install.signing",
          library = "playapp.install.addToLib",
          begin = "playapp.install.copy",
-         finish = "playapp.install.finished",
-         failed = "playapp.install.failed"
+         finish = "playapp.progress.finished",
+         failed = "playapp.progress.failed"
 }
 
-class InstallVM: ObservableObject {
-
-    @Published var status: String = NSLocalizedString(InstallStepsNative.begin.rawValue, comment: "")
-    @Published var progress = 0.0
-    @Published var installing = false
+class InstallVM: ProgressVM<InstallStepsNative> {
 
     static let shared = InstallVM()
 
-    func next(_ step: InstallStepsNative, _ startProgress: Double, _ stopProgress: Double) {
-        Task { @MainActor in
-            self.progress = startProgress
-            self.status = NSLocalizedString(step.rawValue, comment: "")
-            if step == .begin {
-                self.installing = true
-            } else if step == .finish || step == .failed {
-                self.progress = 1.0
-                try await Task.sleep(nanoseconds: 1500000000)
-                self.installing = false
-            }
-            while self.status == NSLocalizedString(step.rawValue, comment: "") {
-                try await Task.sleep(nanoseconds: 50000000)
-                if self.progress < stopProgress {
-                    self.progress += 0.002
-                }
-            }
-        }
+    init() {
+        super.init(start: .begin, ends: [.finish, .failed])
     }
+
 }

PlayCover/ViewModel/ProgressVM.swift

@@ -0,0 +1,48 @@
+//
+//  ProgressVM.swift
+//  PlayCover
+//
+//  Created by TheMoonThatRises on 1/13/23.
+//
+
+import Foundation
+
+class ProgressVM<Steps: RawRepresentable & Equatable>: ObservableObject where Steps.RawValue == String {
+    @Published var progress = 0.0
+    @Published var inProgress = false
+    @Published var status: Steps
+
+    private let starting: Steps
+    private let ends: [Steps]
+
+    /// - Parameters:
+    ///     - starts: The initial starting value
+    ///     - ends: Ending conditions
+    init(start: Steps, ends: [Steps]) {
+        self.status = start
+        self.starting = start
+        self.ends = ends
+    }
+
+    func next(_ step: Steps, _ startProgress: Double, _ stopProgress: Double) {
+        Task { @MainActor in
+            self.progress = startProgress
+            self.status = step
+
+            if step == self.starting {
+                self.inProgress = true
+            } else if self.ends.contains(step) {
+                self.progress = 1.0
+                try await Task.sleep(nanoseconds: 1500000000)
+                self.inProgress = false
+            } else {
+                while self.status == step {
+                    try await Task.sleep(nanoseconds: 50000000)
+                    if self.progress < stopProgress {
+                        self.progress += 0.002
+                    }
+                }
+            }
+        }
+    }
+}

PlayCover/ViewModel/StoreVM.swift

@@ -188,4 +188,5 @@ struct StoreAppData: Codable, Equatable {
     let version: String
     let itunesLookup: String
     let link: String
+    let checksum: String?
 }

PlayCover/Views/App Views/StoreAppView.swift

@@ -34,7 +34,7 @@ struct StoreAppView: View {
                                 warningMessage: $warningMessage)
         .gesture(TapGesture(count: 2).onEnded {
             if let url = URL(string: app.link) {
-                if downloadVM.downloading {
+                if downloadVM.inProgress {
                     Log.shared.error(PlayCoverError.waitDownload)
                 } else {
                     DownloadApp(url: url, app: app,
@@ -114,7 +114,7 @@ struct StoreAppConditionalView: View {
                         .shadow(radius: 1)
                         .padding(.horizontal, 15)
                         .padding(.vertical, 5)
-                        if downloadVM.downloading && downloadVM.storeAppData == app {
+                        if downloadVM.inProgress && downloadVM.storeAppData == app {
                             ProgressView(value: downloadVM.progress)
                                 .progressViewStyle(.circular)
                         }
@@ -154,7 +154,7 @@ struct StoreAppConditionalView: View {
                         .frame(width: 60, height: 60)
                         .cornerRadius(15)
                         .shadow(radius: 1)
-                        if downloadVM.downloading && downloadVM.storeAppData == app {
+                        if downloadVM.inProgress && downloadVM.storeAppData == app {
                             VStack {
                                 Spacer()
                                 ProgressView(value: downloadVM.progress)

PlayCover/Views/MenuBarView.swift

@@ -60,9 +60,9 @@ struct PlayCoverViewMenuView: Commands {
         CommandGroup(replacing: .importExport) {
             Button("menubar.exportToSideloady") {
                 Task {
-                    if InstallVM.shared.installing {
+                    if InstallVM.shared.inProgress {
                         Log.shared.error(PlayCoverError.waitInstallation)
-                    } else if DownloadVM.shared.downloading {
+                    } else if DownloadVM.shared.inProgress {
                         Log.shared.error(PlayCoverError.waitDownload)
                     } else {
                         await NSOpenPanel.selectIPA { result in

PlayCover/Views/PlayCoverApp.swift

@@ -72,6 +72,7 @@ struct PlayCoverApp: App {
             MainView(xcodeCliInstalled: $xcodeCliInstalled,
                      isSigningSetupShown: $isSigningSetupShown)
                 .environmentObject(InstallVM.shared)
+                .environmentObject(DownloadVM.shared)
                 .environmentObject(AppsVM.shared)
                 .environmentObject(storeVM)
                 .environmentObject(AppIntegrity())

PlayCover/Views/Sidebar Views/AppLibraryView.swift

@@ -8,6 +8,7 @@ import SwiftUI
 struct AppLibraryView: View {
     @EnvironmentObject var appsVM: AppsVM
     @EnvironmentObject var installVM: InstallVM
+    @EnvironmentObject var downloadVM: DownloadVM
 
     @Binding var selectedBackgroundColor: Color
     @Binding var selectedTextColor: Color
@@ -65,9 +66,9 @@ struct AppLibraryView: View {
             }
             ToolbarItem(placement: .primaryAction) {
                 Button(action: {
-                    if installVM.installing {
+                    if installVM.inProgress {
                         Log.shared.error(PlayCoverError.waitInstallation)
-                    } else if DownloadVM.shared.downloading {
+                    } else if downloadVM.inProgress {
                         Log.shared.error(PlayCoverError.waitDownload)
                     } else {
                         selectFile()
@@ -101,10 +102,10 @@ struct AppLibraryView: View {
             showLegacyConvertAlert = LegacySettings.doesMonolithExist
         }
         .onDrop(of: ["public.url", "public.file-url"], isTargeted: nil) { (items) -> Bool in
-            if installVM.installing {
+            if installVM.inProgress {
                 Log.shared.error(PlayCoverError.waitInstallation)
                 return false
-            } else if DownloadVM.shared.downloading {
+            } else if downloadVM.inProgress {
                 Log.shared.error(PlayCoverError.waitDownload)
                 return false
             } else if let item = items.first {