macOS: Unobtrusive update views

macos/Sources/Features/Update/UpdateViewModel.swift

@@ -0,0 +1,178 @@
+import Foundation
+import SwiftUI
+
+struct UpdateUIActions {
+    let allowAutoChecks: () -> Void
+    let denyAutoChecks: () -> Void
+    let cancel: () -> Void
+    let install: () -> Void
+    let remindLater: () -> Void
+    let skipThisVersion: () -> Void
+    let showReleaseNotes: () -> Void
+    let retry: () -> Void
+}
+
+class UpdateViewModel: ObservableObject {
+    @Published var state: State = .idle
+    @Published var progress: Double? = nil
+    @Published var details: Details? = nil
+    @Published var error: ErrorInfo? = nil
+    
+    enum State: Equatable {
+        case idle
+        case permissionRequest
+        case checking
+        case updateAvailable
+        case downloading
+        case extracting
+        case readyToInstall
+        case installing
+        case notFound
+        case error
+    }
+    
+    struct ErrorInfo: Equatable {
+        let title: String
+        let message: String
+    }
+    
+    struct Details: Equatable {
+        let version: String
+        let build: String?
+        let size: String?
+        let date: Date?
+        let notesSummary: String?
+    }
+    
+    var stateTooltip: String {
+        switch state {
+        case .idle:
+            return ""
+        case .permissionRequest:
+            return "Update permission required"
+        case .checking:
+            return "Checking for updates…"
+        case .updateAvailable:
+            if let details {
+                return "Update available: \(details.version)"
+            }
+            return "Update available"
+        case .downloading:
+            if let progress {
+                return String(format: "Downloading %.0f%%…", progress * 100)
+            }
+            return "Downloading…"
+        case .extracting:
+            if let progress {
+                return String(format: "Preparing %.0f%%…", progress * 100)
+            }
+            return "Preparing…"
+        case .readyToInstall:
+            return "Ready to install"
+        case .installing:
+            return "Installing…"
+        case .notFound:
+            return "No updates found"
+        case .error:
+            return error?.title ?? "Update failed"
+        }
+    }
+    
+    var text: String {
+        switch state {
+        case .idle:
+            return ""
+        case .permissionRequest:
+            return "Update Permission"
+        case .checking:
+            return "Checking for Updates…"
+        case .updateAvailable:
+            if let details {
+                return "Update Available: \(details.version)"
+            }
+            return "Update Available"
+        case .downloading:
+            if let progress {
+                return String(format: "Downloading: %.0f%%", progress * 100)
+            }
+            return "Downloading…"
+        case .extracting:
+            if let progress {
+                return String(format: "Preparing: %.0f%%", progress * 100)
+            }
+            return "Preparing…"
+        case .readyToInstall:
+            return "Install Update"
+        case .installing:
+            return "Installing…"
+        case .notFound:
+            return "No Updates Available"
+        case .error:
+            return error?.title ?? "Update Failed"
+        }
+    }
+    
+    var iconName: String {
+        switch state {
+        case .idle:
+            return ""
+        case .permissionRequest:
+            return "questionmark.circle"
+        case .checking:
+            return "arrow.triangle.2.circlepath"
+        case .updateAvailable:
+            return "arrow.down.circle.fill"
+        case .downloading, .extracting:
+            return "" // Progress ring instead
+        case .readyToInstall:
+            return "checkmark.circle.fill"
+        case .installing:
+            return "gear"
+        case .notFound:
+            return "info.circle"
+        case .error:
+            return "exclamationmark.triangle.fill"
+        }
+    }
+    
+    var iconColor: Color {
+        switch state {
+        case .idle:
+            return .secondary
+        case .permissionRequest, .checking:
+            return .secondary
+        case .updateAvailable, .readyToInstall:
+            return .accentColor
+        case .downloading, .extracting, .installing:
+            return .secondary
+        case .notFound:
+            return .secondary
+        case .error:
+            return .orange
+        }
+    }
+    
+    var backgroundColor: Color {
+        switch state {
+        case .updateAvailable:
+            return .accentColor
+        case .readyToInstall:
+            return Color(nsColor: NSColor.systemGreen.blended(withFraction: 0.3, of: .black) ?? .systemGreen)
+        case .error:
+            return .orange.opacity(0.2)
+        default:
+            return Color(nsColor: .controlBackgroundColor)
+        }
+    }
+    
+    var foregroundColor: Color {
+        switch state {
+        case .updateAvailable, .readyToInstall:
+            return .white
+        case .error:
+            return .orange
+        default:
+            return .primary
+        }
+    }
+}