Initial commit for first version of project

GasTankAR/Model/Project.swift

@@ -0,0 +1,81 @@
+//
+//  Project.swift
+//  GasTankAR
+//
+//  Created by Dennis Nemec on 25.08.26.
+//
+
+import Foundation
+import SwiftData
+import ARKit
+
+@Model
+final class Project {
+    /// Identifier given by the user for the project. In DOCUframe terms
+    /// it is the LeadID.
+    var leadID: String
+
+    /// Customer name to link the project to.
+    var customerName: String
+
+    var creationDate: Date
+
+    /// Der für das Projekt ausgewählte Tank. Jedes Projekt hat genau einen Tank.
+    /// `Tank` ist `Codable`, daher persistiert SwiftData das direkt als Attribut.
+    var tank: Tank
+
+    /// Archivierte `ARWorldMap` (via `NSKeyedArchiver`). Wegen der Größe extern gespeichert.
+    @Attribute(.externalStorage) var worldMapData: Data?
+
+    /// Welt-Transform des platzierten Tanks (Position, Rotation, Skalierung) als
+    /// 16 Floats (spaltenweise). Zusammen mit der WorldMap wird der Tank so wiederhergestellt.
+    var tankTransform: [Float]?
+
+    /// Im AR-Modus aufgenommene Fotos. Werden beim Löschen des Projekts mitentfernt.
+    @Relationship(deleteRule: .cascade, inverse: \ProjectPhoto.project)
+    var photos: [ProjectPhoto] = []
+
+    init(
+        leadID: String,
+        customerName: String,
+        creationDate: Date,
+        tank: Tank = Tank(),
+        worldMapData: Data? = nil,
+        tankTransform: [Float]? = nil
+    ) {
+        self.leadID = leadID
+        self.customerName = customerName
+        self.creationDate = creationDate
+        self.tank = tank
+        self.worldMapData = worldMapData
+        self.tankTransform = tankTransform
+    }
+
+    /// Human-readable title combining the lead identifier and customer name.
+    var title: String {
+        "\(leadID) – \(customerName)"
+    }
+
+    /// Up to two uppercased initials derived from the customer name, for use as an avatar.
+    var initials: String {
+        let letters = customerName
+            .split(whereSeparator: { $0 == " " || $0 == "&" })
+            .prefix(2)
+            .compactMap { $0.first }
+        return String(letters).uppercased()
+    }
+
+    /// Gespeicherte Session der getrackten Welt. (De-)serialisiert `worldMapData`.
+    /// Berechnete Property – wird von SwiftData nicht persistiert.
+    var worldMap: ARWorldMap? {
+        get {
+            guard let worldMapData else { return nil }
+            return try? NSKeyedUnarchiver.unarchivedObject(ofClass: ARWorldMap.self, from: worldMapData)
+        }
+        set {
+            worldMapData = newValue.flatMap {
+                try? NSKeyedArchiver.archivedData(withRootObject: $0, requiringSecureCoding: true)
+            }
+        }
+    }
+}