feat(mac): add tailscale settings

apps/macos/Sources/Clawdis/TailscaleService.swift

@@ -0,0 +1,150 @@
+import AppKit
+import Foundation
+import Observation
+import os
+
+/// Manages Tailscale integration and status checking.
+@Observable
+@MainActor
+final class TailscaleService {
+    static let shared = TailscaleService()
+
+    /// Tailscale local API endpoint.
+    private static let tailscaleAPIEndpoint = "http://100.100.100.100/api/data"
+
+    /// API request timeout in seconds.
+    private static let apiTimeoutInterval: TimeInterval = 5.0
+
+    private let logger = Logger(subsystem: "com.steipete.clawdis", category: "tailscale")
+
+    /// Indicates if the Tailscale app is installed on the system.
+    private(set) var isInstalled = false
+
+    /// Indicates if Tailscale is currently running.
+    private(set) var isRunning = false
+
+    /// The Tailscale hostname for this device (e.g., "my-mac.tailnet.ts.net").
+    private(set) var tailscaleHostname: String?
+
+    /// The Tailscale IPv4 address for this device.
+    private(set) var tailscaleIP: String?
+
+    /// Error message if status check fails.
+    private(set) var statusError: String?
+
+    private init() {
+        Task { await self.checkTailscaleStatus() }
+    }
+
+    func checkAppInstallation() -> Bool {
+        let installed = FileManager.default.fileExists(atPath: "/Applications/Tailscale.app")
+        self.logger.info("Tailscale app installed: \(installed)")
+        return installed
+    }
+
+    private struct TailscaleAPIResponse: Codable {
+        let status: String
+        let deviceName: String
+        let tailnetName: String
+        let iPv4: String?
+
+        private enum CodingKeys: String, CodingKey {
+            case status = "Status"
+            case deviceName = "DeviceName"
+            case tailnetName = "TailnetName"
+            case iPv4 = "IPv4"
+        }
+    }
+
+    private func fetchTailscaleStatus() async -> TailscaleAPIResponse? {
+        guard let url = URL(string: Self.tailscaleAPIEndpoint) else {
+            self.logger.error("Invalid Tailscale API URL")
+            return nil
+        }
+
+        do {
+            let configuration = URLSessionConfiguration.default
+            configuration.timeoutIntervalForRequest = Self.apiTimeoutInterval
+            let session = URLSession(configuration: configuration)
+
+            let (data, response) = try await session.data(from: url)
+            guard let httpResponse = response as? HTTPURLResponse,
+                  httpResponse.statusCode == 200
+            else {
+                self.logger.warning("Tailscale API returned non-200 status")
+                return nil
+            }
+
+            let decoder = JSONDecoder()
+            return try decoder.decode(TailscaleAPIResponse.self, from: data)
+        } catch {
+            self.logger.debug("Failed to fetch Tailscale status: \(String(describing: error))")
+            return nil
+        }
+    }
+
+    func checkTailscaleStatus() async {
+        self.isInstalled = self.checkAppInstallation()
+        guard self.isInstalled else {
+            self.isRunning = false
+            self.tailscaleHostname = nil
+            self.tailscaleIP = nil
+            self.statusError = "Tailscale is not installed"
+            return
+        }
+
+        if let apiResponse = await fetchTailscaleStatus() {
+            self.isRunning = apiResponse.status.lowercased() == "running"
+
+            if self.isRunning {
+                let deviceName = apiResponse.deviceName
+                    .lowercased()
+                    .replacingOccurrences(of: " ", with: "-")
+                let tailnetName = apiResponse.tailnetName
+                    .replacingOccurrences(of: ".ts.net", with: "")
+                    .replacingOccurrences(of: ".tailscale.net", with: "")
+
+                self.tailscaleHostname = "\(deviceName).\(tailnetName).ts.net"
+                self.tailscaleIP = apiResponse.iPv4
+                self.statusError = nil
+
+                self.logger.info(
+                    "Tailscale running host=\(self.tailscaleHostname ?? "nil") ip=\(self.tailscaleIP ?? "nil")")
+            } else {
+                self.tailscaleHostname = nil
+                self.tailscaleIP = nil
+                self.statusError = "Tailscale is not running"
+            }
+        } else {
+            self.isRunning = false
+            self.tailscaleHostname = nil
+            self.tailscaleIP = nil
+            self.statusError = "Please start the Tailscale app"
+            self.logger.info("Tailscale API not responding; app likely not running")
+        }
+    }
+
+    func openTailscaleApp() {
+        if let url = URL(string: "file:///Applications/Tailscale.app") {
+            NSWorkspace.shared.open(url)
+        }
+    }
+
+    func openAppStore() {
+        if let url = URL(string: "https://apps.apple.com/us/app/tailscale/id1475387142") {
+            NSWorkspace.shared.open(url)
+        }
+    }
+
+    func openDownloadPage() {
+        if let url = URL(string: "https://tailscale.com/download/macos") {
+            NSWorkspace.shared.open(url)
+        }
+    }
+
+    func openSetupGuide() {
+        if let url = URL(string: "https://tailscale.com/kb/1017/install/") {
+            NSWorkspace.shared.open(url)
+        }
+    }
+}