init

CamperMonitor/Store/DeviceStore.swift

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+import Foundation
+import Observation
+
+/// Verwaltet die Fahrzeugprofile, die darin eingerichteten Geräte und deren
+/// Schlüssel.
+@Observable
+final class DeviceStore {
+
+    private static let devicesKey = "configuredDevices"
+    private static let profilesKey = "profiles"
+    private static let activeProfileKey = "activeProfileID"
+
+    /// Alle Geräte über alle Profile hinweg.
+    private(set) var devices: [ConfiguredDevice] = []
+    private(set) var profiles: [Profile] = []
+
+    private(set) var activeProfileID: UUID = Profile.defaultID
+
+    /// Zwischenspeicher, damit nicht bei jedem Advertisement die Keychain
+    /// befragt wird – das passiert bis zu mehrmals pro Sekunde.
+    @ObservationIgnored private var keyCache: [UUID: [UInt8]] = [:]
+
+    init() {
+        if DemoData.isEnabled {
+            profiles = DemoData.profiles
+            devices = DemoData.devices
+            activeProfileID = DemoData.profiles[0].id
+            return
+        }
+        load()
+    }
+
+    // MARK: - Profile
+
+    var activeProfile: Profile? {
+        profiles.first { $0.id == activeProfileID }
+    }
+
+    /// Die Geräte des gewählten Fahrzeugs.
+    var activeDevices: [ConfiguredDevice] {
+        devices.filter { $0.profileID == activeProfileID }
+    }
+
+    var hasMultipleProfiles: Bool { profiles.count > 1 }
+
+    func selectProfile(_ profile: Profile) {
+        guard profile.id != activeProfileID else { return }
+        activeProfileID = profile.id
+        save()
+    }
+
+    @discardableResult
+    func addProfile(named name: String, symbol: String = "box.truck") -> Profile {
+        let profile = Profile(name: name, symbol: symbol)
+        profiles.append(profile)
+        save()
+        return profile
+    }
+
+    func update(_ profile: Profile) {
+        guard let index = profiles.firstIndex(where: { $0.id == profile.id }) else { return }
+        profiles[index] = profile
+        save()
+    }
+
+    /// Entfernt ein Profil samt seiner Geräte und Schlüssel. Das letzte Profil
+    /// bleibt bestehen – ohne Profil hätte die App keinen Ort für Geräte.
+    func removeProfile(_ profile: Profile) {
+        guard profiles.count > 1 else { return }
+        for device in devices where device.profileID == profile.id {
+            KeychainStore.setKey(nil, for: device.id)
+            keyCache[device.id] = nil
+        }
+        devices.removeAll { $0.profileID == profile.id }
+        profiles.removeAll { $0.id == profile.id }
+        if activeProfileID == profile.id, let first = profiles.first {
+            activeProfileID = first.id
+        }
+        save()
+    }
+
+    func deviceCount(in profile: Profile) -> Int {
+        devices.count { $0.profileID == profile.id }
+    }
+
+    // MARK: - Geräte
+
+    /// Legt ein Gerät im gerade gewählten Profil an.
+    func add(_ device: ConfiguredDevice, victronKey: String? = nil) {
+        devices.append(device)
+        if let victronKey {
+            setVictronKey(victronKey, for: device.id)
+        }
+        save()
+    }
+
+    func update(_ device: ConfiguredDevice) {
+        guard let index = devices.firstIndex(where: { $0.id == device.id }) else { return }
+        devices[index] = device
+        save()
+    }
+
+    func remove(_ device: ConfiguredDevice) {
+        devices.removeAll { $0.id == device.id }
+        KeychainStore.setKey(nil, for: device.id)
+        keyCache[device.id] = nil
+        save()
+    }
+
+    /// Nur im aktiven Profil suchen: die Geräte des anderen Fahrzeugs sollen
+    /// weder gelesen noch verbunden werden.
+    func device(withPeripheralID id: UUID) -> ConfiguredDevice? {
+        activeDevices.first { $0.peripheralID == id }
+    }
+
+    // MARK: - Victron-Schlüssel
+
+    func victronKeyText(for deviceID: UUID) -> String? {
+        KeychainStore.key(for: deviceID)
+    }
+
+    func setVictronKey(_ hex: String?, for deviceID: UUID) {
+        let trimmed = hex?.trimmingCharacters(in: .whitespacesAndNewlines)
+        let value = (trimmed?.isEmpty ?? true) ? nil : trimmed
+        KeychainStore.setKey(value, for: deviceID)
+        keyCache[deviceID] = value?.hexBytes
+    }
+
+    /// Der Schlüssel als Bytes, oder nil wenn keiner hinterlegt bzw. der
+    /// hinterlegte keine 16 Byte lang ist.
+    func victronKeyBytes(for deviceID: UUID) -> [UInt8]? {
+        if let cached = keyCache[deviceID] { return cached }
+        guard let bytes = KeychainStore.key(for: deviceID)?.hexBytes, bytes.count == 16 else {
+            return nil
+        }
+        keyCache[deviceID] = bytes
+        return bytes
+    }
+
+    // MARK: - Persistenz
+
+    private func load() {
+        let defaults = UserDefaults.standard
+
+        if let data = defaults.data(forKey: Self.profilesKey),
+           let decoded = try? JSONDecoder().decode([Profile].self, from: data),
+           !decoded.isEmpty {
+            profiles = decoded
+        } else {
+            // Erster Start oder Update von einer Version ohne Profile.
+            profiles = [.initial]
+        }
+
+        if let data = defaults.data(forKey: Self.devicesKey),
+           let decoded = try? JSONDecoder().decode([ConfiguredDevice].self, from: data) {
+            devices = decoded
+        }
+
+        if let raw = defaults.string(forKey: Self.activeProfileKey),
+           let id = UUID(uuidString: raw),
+           profiles.contains(where: { $0.id == id }) {
+            activeProfileID = id
+        } else {
+            activeProfileID = profiles[0].id
+        }
+
+        // Geräte, deren Profil nicht mehr existiert, wären sonst unerreichbar.
+        let known = Set(profiles.map(\.id))
+        for index in devices.indices where !known.contains(devices[index].profileID) {
+            devices[index].profileID = profiles[0].id
+        }
+    }
+
+    private func save() {
+        let defaults = UserDefaults.standard
+        if let data = try? JSONEncoder().encode(devices) {
+            defaults.set(data, forKey: Self.devicesKey)
+        }
+        if let data = try? JSONEncoder().encode(profiles) {
+            defaults.set(data, forKey: Self.profilesKey)
+        }
+        defaults.set(activeProfileID.uuidString, forKey: Self.activeProfileKey)
+    }
+}