feat: save photo in persistence

Memola/Canvas/Contexts/GraphicContext.swift

@@ -139,8 +139,9 @@ extension GraphicContext {
                     }
                 }
             case 1:
-                #warning("TODO: implement photo")
-                break
+                guard let photo = element.photo, photo.imageURL != nil else { return }
+                let _photo = Photo(object: photo)
+                tree.insert(_photo.element, in: _photo.photoBox)
             default:
                 break
             }
@@ -150,9 +151,8 @@ extension GraphicContext {
     }
 
     func loadQuads(_ bounds: CGRect, on context: NSManagedObjectContext) {
-        #warning("TODO: implement photo")
-        for _stroke in self.tree.search(box: bounds.box) {
-            guard let stroke = _stroke.stroke(as: PenStroke.self), stroke.isEmpty else { continue }
+        for element in self.tree.search(box: bounds.box) {
+            guard let stroke = element.stroke(as: PenStroke.self), stroke.isEmpty else { continue }
             stroke.loadQuads(with: self)
         }
     }
@@ -309,7 +309,26 @@ extension GraphicContext {
         let origin = point
         let bounds = [origin.x - size.width / 2, origin.y - size.height / 2, origin.x + size.width / 2, origin.y + size.height / 2]
         let photo = Photo(url: url, size: size, origin: origin, bounds: bounds, createdAt: .now)
-        tree.insert(.photo(photo), in: photo.photoBox)
+        tree.insert(photo.element, in: photo.photoBox)
+        withPersistence(\.backgroundContext) { [_photo = photo, graphicContext = object] context in
+            let photo = PhotoObject(\.backgroundContext)
+            photo.imageURL = _photo.url
+            photo.bounds = _photo.bounds
+            photo.width = _photo.size.width
+            photo.originY = _photo.origin.y
+            photo.originX = _photo.origin.x
+            photo.height = _photo.size.height
+            photo.createdAt = _photo.createdAt
+            let element = ElementObject(\.backgroundContext)
+            element.createdAt = _photo.createdAt
+            element.type = 1
+            element.graphicContext = graphicContext
+            photo.element = element
+            element.photo = photo
+            graphicContext?.elements.add(element)
+            _photo.object = photo
+            try context.saveIfNeeded()
+        }
         self.previousElement = .photo(photo)
     }
 }

Memola/Canvas/Elements/Photo/Photo.swift

@@ -24,15 +24,6 @@ final class Photo: @unchecked Sendable, Equatable, Comparable {
     var vertexCount: Int = 0
     var vertexBuffer: MTLBuffer?
 
-    init(image: UIImage?, size: CGSize, origin: CGPoint, bounds: [CGFloat], createdAt: Date) {
-        self.size = size
-        self.origin = origin
-        self.image = image
-        self.bounds = bounds
-        self.createdAt = createdAt
-        generateVertices()
-    }
-
     init(url: URL?, size: CGSize, origin: CGPoint, bounds: [CGFloat], createdAt: Date) {
         self.size = size
         self.origin = origin
@@ -44,7 +35,7 @@ final class Photo: @unchecked Sendable, Equatable, Comparable {
 
     convenience init(object: PhotoObject) {
         self.init(
-            image: UIImage(data: object.image ?? .init()),
+            url: object.imageURL,
             size: .init(width: object.width, height: object.height),
             origin: .init(x: object.originX, y: object.originY),
             bounds: object.bounds,
@@ -117,4 +108,8 @@ extension Photo {
     func isVisible(in bounds: CGRect) -> Bool {
         bounds.contains(photoBounds) || bounds.intersects(photoBounds)
     }
+
+    var element: Element {
+        .photo(self)
+    }
 }

Memola/Persistence/Objects/PhotoObject.swift

@@ -16,6 +16,6 @@ class PhotoObject: NSManagedObject {
     @NSManaged var height: CGFloat
     @NSManaged var bounds: [CGFloat]
     @NSManaged var createdAt: Date?
-    @NSManaged var image: Data?
+    @NSManaged var imageURL: URL?
     @NSManaged var element: ElementObject?
 }

Memola/Resources/Models/MemolaModel.xcdatamodeld/MemolaModel.xcdatamodel/contents

@@ -45,7 +45,7 @@
         <attribute name="bounds" attributeType="Transformable" valueTransformerName="NSSecureUnarchiveFromDataTransformer" customClassName="[CGFloat]"/>
         <attribute name="createdAt" attributeType="Date" usesScalarValueType="NO"/>
         <attribute name="height" attributeType="Double" defaultValueString="0.0" usesScalarValueType="YES"/>
-        <attribute name="image" optional="YES" attributeType="Binary" allowsExternalBinaryDataStorage="YES"/>
+        <attribute name="imageURL" optional="YES" attributeType="URI"/>
         <attribute name="originX" attributeType="Double" defaultValueString="0.0" usesScalarValueType="YES"/>
         <attribute name="originY" attributeType="Double" defaultValueString="0.0" usesScalarValueType="YES"/>
         <attribute name="width" attributeType="Double" defaultValueString="0.0" usesScalarValueType="YES"/>