macOS: review windows when closing multiple tabs

macos/Sources/App/AppDelegate.swift

@@ -1346,13 +1346,9 @@ extension AppDelegate {
 
             return .terminateLater
         } else {
-            let alert = NSAlert()
-            alert.messageText = "You have \(controllersNeedConfirmation.count) windows with running processes. Do you want to review these windows before quitting?"
-            alert.informativeText = "If you don't review your windows, any running processes will be terminated"
-            alert.addButton(withTitle: "Review Windows...")
-            alert.addButton(withTitle: "Terminate Processes")
-            alert.addButton(withTitle: "Cancel")
-            alert.alertStyle = .warning
+            let alert = NSAlert.reviewWindowsAlert(
+                messageText: "You have \(controllersNeedConfirmation.count) windows with running processes. Do you want to review these windows before quitting?"
+            )
 
             switch alert.runModal() {
             case .alertFirstButtonReturn:

macos/Sources/Features/Terminal/TerminalController.swift

@@ -1386,21 +1386,58 @@ class TerminalController: BaseTerminalController, TabGroupCloseCoordinator.Contr
         // if we're closing the window. If we don't have a tabgroup for any
         // reason we check ourselves.
         let windows: [NSWindow] = window.tabGroup?.windows ?? [window]
-        guard let confirmController = windows
+        let confirmControllers = windows
             .compactMap({ $0.windowController as? TerminalController })
-            .first(where: { $0.surfaceTree.contains(where: { $0.needsConfirmQuit }) })
+            .filter({ $0.surfaceTree.contains(where: { $0.needsConfirmQuit }) })
+        guard
+            !confirmControllers.isEmpty
         else {
             closeWindowImmediately()
             return
         }
+        if confirmControllers.count == 1 {
+            // We call confirmClose on the proper controller so the alert is
+            // attached to the window that needs confirmation.
+            confirmControllers[0].confirmClose(
+                messageText: "Close Window?",
+                informativeText: "All terminal sessions in this window will be terminated.",
+            ) {
+                self.closeWindowImmediately()
+            }
+            return
+        }
 
-        // We call confirmClose on the proper controller so the alert is
-        // attached to the window that needs confirmation.
-        confirmController.confirmClose(
-            messageText: "Close Window?",
-            informativeText: "All terminal sessions in this window will be terminated.",
-        ) {
-            self.closeWindowImmediately()
+        Task {
+            let alert = NSAlert.reviewWindowsAlert(
+                messageText: "You have \(confirmControllers.count) windows with running processes. Do you want to review these windows before closing?",
+                terminateNowButtonTitle: "Close"
+            )
+            switch await alert.beginSheetModal(for: window) {
+            case .alertFirstButtonReturn:
+                await reviewWindows(confirmControllers, window: window)
+            case .alertSecondButtonReturn:
+                closeWindowImmediately()
+            default:
+                break
+            }
+        }
+    }
+
+    private func reviewWindows(_ controllers: [TerminalController], window: NSWindow) async {
+        for controller in controllers {
+            let response = await controller.confirmCloseAsync(
+                messageText: "Close Window?",
+                informativeText: "All terminal sessions in this window will be terminated.",
+            )
+
+            if [.OK, .alertFirstButtonReturn].contains(response) {
+                // Close this tab
+                controller.closeTabImmediately()
+                continue
+            } else {
+                // Cancel the review
+                return
+            }
         }
     }
 

macos/Sources/Helpers/Extensions/NSAlert+Extension.swift

@@ -0,0 +1,19 @@
+import AppKit
+
+extension NSAlert {
+    static func reviewWindowsAlert(
+        messageText: String,
+        informativeText: String = "If you don't review your windows, any running processes will be terminated",
+        terminateNowButtonTitle: String = "Terminate Processes"
+    ) -> NSAlert {
+        let alert = NSAlert()
+        alert.messageText = messageText
+        alert.informativeText = informativeText
+        alert.addButton(withTitle: "Review Windows...")
+        alert.addButton(withTitle: terminateNowButtonTitle)
+        alert.addButton(withTitle: "Cancel")
+        alert.alertStyle = .warning
+
+        return alert
+    }
+}