feat(ios): reconnect to last bridge

apps/ios/Sources/Bridge/BridgeConnectionController.swift

@@ -0,0 +1,94 @@
+import ClawdisKit
+import Combine
+import Foundation
+import Network
+import SwiftUI
+
+@MainActor
+final class BridgeConnectionController: ObservableObject {
+    @Published private(set) var bridges: [BridgeDiscoveryModel.DiscoveredBridge] = []
+    @Published private(set) var discoveryStatusText: String = "Idle"
+
+    private let discovery = BridgeDiscoveryModel()
+    private weak var appModel: NodeAppModel?
+    private var cancellables = Set<AnyCancellable>()
+    private var didAutoConnect = false
+
+    init(appModel: NodeAppModel) {
+        self.appModel = appModel
+
+        BridgeSettingsStore.bootstrapPersistence()
+
+        self.discovery.$bridges
+            .sink { [weak self] newValue in
+                guard let self else { return }
+                self.bridges = newValue
+                self.maybeAutoConnect()
+            }
+            .store(in: &self.cancellables)
+
+        self.discovery.$statusText
+            .assign(to: &self.$discoveryStatusText)
+
+        self.discovery.start()
+    }
+
+    func setScenePhase(_ phase: ScenePhase) {
+        switch phase {
+        case .background:
+            self.discovery.stop()
+        case .active, .inactive:
+            self.discovery.start()
+        @unknown default:
+            self.discovery.start()
+        }
+    }
+
+    private func maybeAutoConnect() {
+        guard !self.didAutoConnect else { return }
+        guard let appModel = self.appModel else { return }
+        guard appModel.bridgeServerName == nil else { return }
+
+        let defaults = UserDefaults.standard
+        let preferredStableID = defaults.string(forKey: "bridge.preferredStableID")?
+            .trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
+        guard !preferredStableID.isEmpty else { return }
+
+        let instanceId = defaults.string(forKey: "node.instanceId")?
+            .trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
+        guard !instanceId.isEmpty else { return }
+
+        let token = KeychainStore.loadString(
+            service: "com.steipete.clawdis.bridge",
+            account: "bridge-token.\(instanceId)")?
+            .trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
+        guard !token.isEmpty else { return }
+
+        guard let target = self.bridges.first(where: { $0.stableID == preferredStableID }) else { return }
+
+        self.didAutoConnect = true
+        appModel.connectToBridge(endpoint: target.endpoint, hello: self.makeHello(token: token))
+    }
+
+    private func makeHello(token: String) -> BridgeHello {
+        let defaults = UserDefaults.standard
+        let nodeId = defaults.string(forKey: "node.instanceId") ?? "ios-node"
+        let displayName = defaults.string(forKey: "node.displayName") ?? "iOS Node"
+
+        return BridgeHello(
+            nodeId: nodeId,
+            displayName: displayName,
+            token: token,
+            platform: self.platformString(),
+            version: self.appVersion())
+    }
+
+    private func platformString() -> String {
+        let v = ProcessInfo.processInfo.operatingSystemVersion
+        return "iOS \(v.majorVersion).\(v.minorVersion).\(v.patchVersion)"
+    }
+
+    private func appVersion() -> String {
+        Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "dev"
+    }
+}