Support game saving

Chess.xcodeproj/project.pbxproj

@@ -8,6 +8,9 @@
 
 /* Begin PBXBuildFile section */
 		0558E89E2F0BBAE8006EE0FA /* rook.icon in Resources */ = {isa = PBXBuildFile; fileRef = 0558E89D2F0BBAE8006EE0FA /* rook.icon */; };
+		05F753BD2F2159080017ADA8 /* SaveGame.swift in Sources */ = {isa = PBXBuildFile; fileRef = 05F753BC2F2159050017ADA8 /* SaveGame.swift */; };
+		05F753BF2F2159170017ADA8 /* SaveCoordinator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 05F753BE2F2159160017ADA8 /* SaveCoordinator.swift */; };
+		05F753C92F217B0F0017ADA8 /* GameSnapshot.swift in Sources */ = {isa = PBXBuildFile; fileRef = 05F753C72F217B0E0017ADA8 /* GameSnapshot.swift */; };
 		561B67F328D2604600D6E2F7 /* BoardInteractor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 561B67F228D2604600D6E2F7 /* BoardInteractor.swift */; };
 		561B67F828D4C12F00D6E2F7 /* PickExpectation.swift in Sources */ = {isa = PBXBuildFile; fileRef = 561B67F728D4C12F00D6E2F7 /* PickExpectation.swift */; };
 		561B67FC28D4C14700D6E2F7 /* Action.swift in Sources */ = {isa = PBXBuildFile; fileRef = 561B67FB28D4C14700D6E2F7 /* Action.swift */; };
@@ -105,6 +108,9 @@
 
 /* Begin PBXFileReference section */
 		0558E89D2F0BBAE8006EE0FA /* rook.icon */ = {isa = PBXFileReference; lastKnownFileType = folder.iconcomposer.icon; path = rook.icon; sourceTree = "<group>"; };
+		05F753BC2F2159050017ADA8 /* SaveGame.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SaveGame.swift; sourceTree = "<group>"; };
+		05F753BE2F2159160017ADA8 /* SaveCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SaveCoordinator.swift; sourceTree = "<group>"; };
+		05F753C72F217B0E0017ADA8 /* GameSnapshot.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GameSnapshot.swift; sourceTree = "<group>"; };
 		561B67F228D2604600D6E2F7 /* BoardInteractor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BoardInteractor.swift; sourceTree = "<group>"; };
 		561B67F728D4C12F00D6E2F7 /* PickExpectation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PickExpectation.swift; sourceTree = "<group>"; };
 		561B67FB28D4C14700D6E2F7 /* Action.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Action.swift; sourceTree = "<group>"; };
@@ -183,6 +189,15 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		05F753BB2F2158FF0017ADA8 /* Save */ = {
+			isa = PBXGroup;
+			children = (
+				05F753BE2F2159160017ADA8 /* SaveCoordinator.swift */,
+				05F753BC2F2159050017ADA8 /* SaveGame.swift */,
+			);
+			path = Save;
+			sourceTree = "<group>";
+		};
 		56122C1728DB36A800D31958 /* Storyboards */ = {
 			isa = PBXGroup;
 			children = (
@@ -349,6 +364,8 @@
 		569699C228CE479700469E6B /* Game */ = {
 			isa = PBXGroup;
 			children = (
+				05F753C72F217B0E0017ADA8 /* GameSnapshot.swift */,
+				05F753BB2F2158FF0017ADA8 /* Save */,
 				562D0E6E28E1E60300944DF2 /* Field */,
 				561B67FA28D4C13C00D6E2F7 /* Move */,
 				561B67F528D2604900D6E2F7 /* Board */,
@@ -600,6 +617,7 @@
 				5648531728C90D7F00BA4CC0 /* Move.swift in Sources */,
 				561B67FC28D4C14700D6E2F7 /* Action.swift in Sources */,
 				5648531128C90B5C00BA4CC0 /* PieceColor.swift in Sources */,
+				05F753BF2F2159170017ADA8 /* SaveCoordinator.swift in Sources */,
 				56BA8DEA28DF09F80012A5CE /* QueenMoveGenerator.swift in Sources */,
 				56BB94AE28A94A750034D4AB /* GameViewController.swift in Sources */,
 				561B67F328D2604600D6E2F7 /* BoardInteractor.swift in Sources */,
@@ -613,6 +631,7 @@
 				56BA8DDC28DE59C40012A5CE /* HistoryBrowser.swift in Sources */,
 				567A568528CB68BF008DDE40 /* CameraController.swift in Sources */,
 				5648531528C90B9100BA4CC0 /* Piece.swift in Sources */,
+				05F753C92F217B0F0017ADA8 /* GameSnapshot.swift in Sources */,
 				5648530F28C90B2600BA4CC0 /* PieceType.swift in Sources */,
 				56D8FCED28E4EE0400027132 /* PieceParser.swift in Sources */,
 				562D0E7128E1E60E00944DF2 /* FieldParser.swift in Sources */,
@@ -623,6 +642,7 @@
 				56BA8DE428DF08110012A5CE /* RookMoveGenerator.swift in Sources */,
 				569699CA28CE4DD300469E6B /* Field.swift in Sources */,
 				56BA8DE828DF09BF0012A5CE /* KingMoveGenerator.swift in Sources */,
+				05F753BD2F2159080017ADA8 /* SaveGame.swift in Sources */,
 				567A568828CBA420008DDE40 /* MouseInteractionHandler.swift in Sources */,
 				561B67F828D4C12F00D6E2F7 /* PickExpectation.swift in Sources */,
 				56C3174728CFFDCB00C04F3C /* MovesGenerator.swift in Sources */,
@@ -720,7 +740,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 12.4;
+				MACOSX_DEPLOYMENT_TARGET = 14.6;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -776,7 +796,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 12.4;
+				MACOSX_DEPLOYMENT_TARGET = 14.6;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = macosx;
@@ -847,7 +867,6 @@
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
 				CURRENT_PROJECT_VERSION = 1;
 				GENERATE_INFOPLIST_FILE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 12.5;
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.stompor.mateusz.porcelain.chess.tests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -864,7 +883,6 @@
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
 				CURRENT_PROJECT_VERSION = 1;
 				GENERATE_INFOPLIST_FILE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 12.5;
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.stompor.mateusz.porcelain.chess.tests;
 				PRODUCT_NAME = "$(TARGET_NAME)";

Chess/Common/Game/CheckState.swift

@@ -1,8 +1,5 @@
 //
-//  CheckState.swift
-//  Chess
-//
-//  Created by Mateusz Stompór on 26/09/2022.
+//  Copyright © 2022 Mateusz Stompór. All rights reserved.
 //
 
 enum CheckState: Codable {

Chess/Common/Game/GameSnapshot.swift

@@ -0,0 +1,22 @@
+//
+//  Copyright © 2026 Mateusz Stompór. All rights reserved.
+//
+
+class GameSnapshot: Codable {
+    var board: Board
+    var selectedPiece: Piece?
+    var turn: PieceColor
+    var expectation: PickExpectation
+    var checkState: CheckState
+    init(board: Board,
+         selectedPiece: Piece? = nil,
+         turn: PieceColor,
+         expectation: PickExpectation,
+         checkState: CheckState) {
+        self.board = board
+        self.selectedPiece = selectedPiece
+        self.turn = turn
+        self.expectation = expectation
+        self.checkState = checkState
+    }
+}

Chess/Common/Game/GameState.swift

@@ -1,29 +1,55 @@
 //
-//  GameState.swift
-//  Chess
-//
-//  Created by Mateusz Stompór on 16/09/2022.
+//  Copyright © 2022 Mateusz Stompór. All rights reserved.
 //
 
+import SwiftData
+
+@Model
 class GameState {
-    let previous: GameState?
-    let board: Board
-    let selectedPiece: Piece?
-    let turn: PieceColor
-    let expectation: PickExpectation
-    let checkState: CheckState
+    var all: [GameSnapshot]
+    var last: GameSnapshot {
+        guard let lastState = all.last else {
+            fatalError("Invalid state, game must have at least one board")
+        }
+        return lastState
+    }
+    var board: Board {
+        last.board
+    }
+    var selectedPiece: Piece? {
+        last.selectedPiece
+    }
+    var turn: PieceColor {
+        last.turn
+    }
+    var expectation: PickExpectation {
+        last.expectation
+    }
+    var checkState: CheckState {
+        last.checkState
+    }
+    var previous: GameState? {
+        guard all.count > 1 else {
+            return nil
+        }
+        return GameState(all: Array(all.dropLast()))
+    }
+    private init(all: [GameSnapshot]) {
+        self.all = all
+    }
     init(previous: GameState?,
          board: Board,
          selectedPiece: Piece?,
          turn: PieceColor,
          expectation: PickExpectation,
          checkState: CheckState) {
-        self.previous = previous
-        self.board = board
-        self.selectedPiece = selectedPiece
-        self.turn = turn
-        self.expectation = expectation
-        self.checkState = checkState
+        let allPrevious = previous?.all ?? []
+        let current = GameSnapshot(board: board,
+                                   selectedPiece: selectedPiece,
+                                   turn: turn,
+                                   expectation: expectation,
+                                   checkState: checkState)
+        all = allPrevious + [current]
     }
     static var initial: GameState {
         GameState(previous: nil,

Chess/Common/Game/HistoryBrowser.swift

@@ -1,8 +1,5 @@
 //
-//  HistoryBrowser.swift
-//  Chess
-//
-//  Created by Mateusz Stompór on 23/09/2022.
+//  Copyright © 2022 Mateusz Stompór. All rights reserved.
 //
 
 class HistoryBrowser {

Chess/Common/Game/PickExpectation.swift

@@ -1,8 +1,5 @@
 //
-//  PickExpectation.swift
-//  Chess
-//
-//  Created by Mateusz Stompór on 16/09/2022.
+//  Copyright © 2022 Mateusz Stompór. All rights reserved.
 //
 
 enum PickExpectation: Codable {

Chess/Common/Game/Save/SaveCoordinator.swift

@@ -0,0 +1,83 @@
+//
+//  Copyright © 2022 Mateusz Stompór. All rights reserved.
+//
+
+import Combine
+import SwiftData
+
+class SaveCoordinator {
+    let saveDidChange = PassthroughSubject<Void, Never>()
+    private let container: ModelContainer
+    static let shared: SaveCoordinator = {
+        SaveCoordinator()
+    }()
+    private init() {
+        do {
+            container = try ModelContainer(for: SaveGame.self)
+        } catch {
+            fatalError("Failed to create ModelContainer: \(error)")
+        }
+    }
+    func save(game: SaveGame) -> Bool {
+        let context = ModelContext(container)
+        save(state: game.state, context: context)
+        context.insert(game)
+        do {
+            try context.save()
+        } catch {
+            print("Failed to insert: \(error)")
+            return false
+        }
+        saveDidChange.send()
+        return true
+    }
+    private func save(state: GameState, context: ModelContext) {
+        context.insert(state)
+        if let previous = state.previous {
+            save(state: previous, context: context)
+        }
+    }
+    var saveCount: Int {
+        all.count
+    }
+    var all: [SaveGame] {
+        let context = ModelContext(container)
+
+        let fetchDescriptor = FetchDescriptor<SaveGame>()
+        do {
+            return try context.fetch(fetchDescriptor)
+        } catch {
+            return []
+        }
+    }
+    func load(index: Int) -> SaveGame? {
+        let context = ModelContext(container)
+
+        let fetchDescriptor = FetchDescriptor<SaveGame>()
+        do {
+            return try context.fetch(fetchDescriptor)[index]
+        } catch {
+            return nil
+        }
+    }
+    func wipe() -> Bool {
+        let context = ModelContext(container)
+
+        let fetchDescriptor = FetchDescriptor<SaveGame>()
+        do {
+            let saves = try context.fetch(fetchDescriptor)
+
+            for save in saves {
+                context.delete(save)
+            }
+
+            try context.save()
+            print("All save records deleted!")
+        } catch {
+            print("Failed to delete: \(error)")
+            return false
+        }
+        saveDidChange.send()
+        return true
+    }
+}

Chess/Common/Game/Save/SaveGame.swift

@@ -0,0 +1,16 @@
+//
+//  Copyright © 2022 Mateusz Stompór. All rights reserved.
+//
+
+import Foundation
+import SwiftData
+
+@Model
+class SaveGame {
+    var creationDate: Date
+    var state: GameState
+    init(creationDate: Date, state: GameState) {
+        self.creationDate = creationDate
+        self.state = state
+    }
+}

Chess/Common/Scene/ResourceLoader.swift

@@ -1,8 +1,5 @@
 //
-//  ResourceLoader.swift
-//  Chess
-//
-//  Created by Mateusz Stompór on 06/09/2022.
+//  Copyright © 2022 Mateusz Stompór. All rights reserved.
 //
 
 import MetalKit

Chess/Common/Scene/SceneBuilder.swift

@@ -1,8 +1,5 @@
 //
-//  SceneBuilder.swift
-//  Chess
-//
-//  Created by Mateusz Stompór on 06/09/2022.
+//  Copyright © 2022 Mateusz Stompór. All rights reserved.
 //
 
 import Metal