Initial commit for first version of project

GasTankAR/Views/TankAR/ARProjectPersisting.swift

@@ -0,0 +1,67 @@
+//
+//  ARProjectPersisting.swift
+//  GasTankAR
+//
+//  Created by Dennis Nemec on 26.08.26.
+//
+
+import ARKit
+import CoreLocation
+import SwiftData
+
+/// Abstraktion der Projekt-Persistenz für den AR-Modus (Dependency Inversion):
+/// Der Controller kennt so kein SwiftData und ist unit-testbar.
+@MainActor
+protocol ARProjectPersisting: AnyObject {
+    var tank: Tank { get }
+    var worldMap: ARWorldMap? { get }
+    var tankTransform: [Float]? { get }
+
+    func saveWorldMap(_ data: Data)
+    func saveTankTransform(_ transform: [Float])
+    func clearTankTransform()
+    func savePhoto(_ imageData: Data, date: Date, coordinate: CLLocationCoordinate2D?)
+}
+
+/// SwiftData-Adapter: verbindet das `Project`-Model mit dem `ARProjectPersisting`-Protokoll.
+@MainActor
+final class ProjectPersistenceAdapter: ARProjectPersisting {
+    private let project: Project
+    private let modelContext: ModelContext
+
+    init(project: Project, modelContext: ModelContext) {
+        self.project = project
+        self.modelContext = modelContext
+    }
+
+    var tank: Tank { project.tank }
+    var worldMap: ARWorldMap? { project.worldMap }
+    var tankTransform: [Float]? { project.tankTransform }
+
+    func saveWorldMap(_ data: Data) {
+        project.worldMapData = data
+        try? modelContext.save()
+    }
+
+    func saveTankTransform(_ transform: [Float]) {
+        project.tankTransform = transform
+        try? modelContext.save()
+    }
+
+    func clearTankTransform() {
+        project.tankTransform = nil
+        try? modelContext.save()
+    }
+
+    func savePhoto(_ imageData: Data, date: Date, coordinate: CLLocationCoordinate2D?) {
+        let photo = ProjectPhoto(
+            creationDate: date,
+            imageData: imageData,
+            latitude: coordinate?.latitude,
+            longitude: coordinate?.longitude,
+            project: project
+        )
+        modelContext.insert(photo)
+        try? modelContext.save()
+    }
+}