Baretag iOS App

iOS app (SwiftUI) for the BareTag tracking system: real-time map of anchors and tags, optional grid and boundary polygon, and out-of-bounds alerts. Auth and user data come from a configurable backend (e.g. Flask/Ngrok). ContentView uses a global BASE_URL and @AppStorage for auth state; authenticated users see the main tab view and fetchUserData() loads profile data; otherwise LoginView is shown. Demonstrates SwiftUI app structure, MapKit/annotations, backend integration, and state management for a real-time tracking product.

MainTabView and tabs The app has three tabs: AnchorLocatorView (Localizer), MapView (Map), and AccountView (Account). AccountView holds the logout binding so the user can sign out.

MapView and map state MapView uses TagDataWatcher and AnchorDataWatcher (with useLocalFile: false) as @StateObjects, plus UserLocationManager for the device location. The map is centered at a configurable coordinate with adjustable span. MapViewRepresentable receives the region, lock state, boundary polygon (user-drawn), and annotations for tags and anchors. State tracks grid visibility, drawing mode, boundary coordinates, and out-of-bounds tags with alerts (debounced so the same tag does not alert repeatedly). A 1 s timer refreshes data; the user can tap a tag or anchor to see details.

Anchor model Anchor.swift defines Anchor as Identifiable, Codable with id, name, latitude, longitude, and a 2D position (CGPoint). Codable maps backend positionX/positionY to position.x/position.y.

Other components The app also includes TagModel (BareTag), TagLocatorView, TagLocationManager, TagDataWatcher, MapViewModel, GridOverlay, LoginView, RegisterView, AccountView, and UserLocationManager.