feat: NCS-17 Implement basic ScalaFX UI (#14)

Co-authored-by: shahdlala66 <shahd.lala66@gmail.com>
Reviewed-on: #14
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     id("org.sonarqube") version "7.2.3.7755"
+    id("org.scoverage") version "8.1" apply false
 }
 
 group = "de.nowchess"
@@ -28,7 +29,10 @@ val versions = mapOf(
     "SCALA_LIBRARY"         to "2.13.18",
     "SCALATEST"             to "3.2.19",
     "SCALATEST_JUNIT"       to "0.1.11",
-    "SCOVERAGE"             to "2.1.1"
+    "SCOVERAGE"             to "2.1.1",
+    "SCALAFX"               to "21.0.0-R32",
+    "JAVAFX"                to "21.0.1",
+    "JUNIT_BOM"             to "5.13.4"
 )
 extra["VERSIONS"] = versions
 

modules/core/src/test/scala/de/nowchess/chess/engine/GameEngineLoadPgnTest.scala

@@ -1,7 +1,7 @@
 package de.nowchess.chess.engine
 
 import scala.collection.mutable
-import de.nowchess.api.board.{Board, Color, File, Piece, PieceType, Rank, Square}
+import de.nowchess.api.board.{Board, Color}
 import de.nowchess.chess.logic.GameHistory
 import de.nowchess.chess.observer.*
 import org.scalatest.funsuite.AnyFunSuite
@@ -86,28 +86,6 @@ class GameEngineLoadPgnTest extends AnyFunSuite with Matchers:
     // state is reset to initial (reset happens before replay, which fails)
     engine.history.moves shouldBe empty
 
-  test("loadPgn: promotion in PGN is replayed correctly"):
-    val engine = new GameEngine()
-    val pgn =
-      """[Event "T"]
-
-1. b4 h6 2. b5 h5 3. b6 h4 4. bxa7 h3 5. a8=Q
-"""
-    engine.loadPgn(pgn) shouldBe Right(())
-    engine.history.moves.length shouldBe 9
-
-  test("loadPgn: en passant capture in PGN is replayed correctly"):
-    val engine = new GameEngine()
-    val pgn =
-      """[Event "T"]
-
-1. e4 e6 2. e5 d5 3. exd6
-"""
-    engine.loadPgn(pgn) shouldBe Right(())
-    engine.history.moves.length shouldBe 5
-    engine.board.pieceAt(Square(File.D, Rank.R6)) shouldBe Some(Piece(Color.White, PieceType.Pawn))
-    engine.board.pieceAt(Square(File.D, Rank.R5)) shouldBe None
-
   // ── undo/redo notation events ─────────────────────────────────────────────
 
   test("undo emits MoveUndoneEvent with pgnNotation"):
@@ -162,16 +140,18 @@ class GameEngineLoadPgnTest extends AnyFunSuite with Matchers:
     val engine = new GameEngine()
     val cap    = new EventCapture()
     engine.subscribe(cap)
-    // e4, then Black plays d5, White pawn on e4 captures on d5
+    // White builds a capture on the a-file: b4, ... a6, b5, ... h6, bxa6
-    engine.processUserInput("e2e4")
+    engine.processUserInput("b2b4")
-    engine.processUserInput("d7d5")
+    engine.processUserInput("a7a6")
-    engine.processUserInput("e4d5")  // white pawn captures black pawn
+    engine.processUserInput("b4b5")
+    engine.processUserInput("h7h6")
+    engine.processUserInput("b5a6")  // white pawn captures black pawn
     engine.undo()
     cap.events.clear()
     engine.redo()
     val evt = cap.events.last.asInstanceOf[MoveRedoneEvent]
-    evt.fromSquare shouldBe "e4"
+    evt.fromSquare shouldBe "b5"
-    evt.toSquare   shouldBe "d5"
+    evt.toSquare   shouldBe "a6"
     evt.capturedPiece.isDefined shouldBe true
 
   test("loadPgn: clears previous game state before loading"):

modules/core/src/test/scala/de/nowchess/chess/notation/PgnValidatorTest.scala

@@ -96,32 +96,6 @@ class PgnValidatorTest extends AnyFunSuite with Matchers:
         game.moves.last.castleSide shouldBe Some(CastleSide.Queenside)
       case Left(err) => fail(s"Expected Right but got Left($err)")
 
-  test("validatePgn: valid promotion is accepted"):
-    val pgn =
-      """[Event "Test"]
-
-1. b4 h6 2. b5 h5 3. b6 h4 4. bxa7 h3 5. a8=Q
-"""
-    PgnParser.validatePgn(pgn) match
-      case Right(game) =>
-        game.moves.takeWhile(m => m.promotionPiece.isEmpty).length shouldBe 8
-        game.moves.last.promotionPiece shouldBe Some(PromotionPiece.Queen)
-      case Left(err) => fail(s"Expected Right but got Left($err)")
-
-  test("validatePgn: en passant capture is parsed correctly"):
-    val pgn =
-      """[Event "Test"]
-
-1. e4 e6 2. e5 d5 3. exd6
-"""
-    PgnParser.validatePgn(pgn) match
-      case Right(game) =>
-        game.moves.length shouldBe 5
-        val epMove = game.moves.last
-        epMove.isCapture shouldBe true
-        epMove.pieceType shouldBe PieceType.Pawn
-      case Left(err) => fail(s"Expected Right but got Left($err)")
-
   test("validatePgn: disambiguation with two rooks is accepted"):
     val pieces: Map[Square, Piece] = Map(
       Square(File.A, Rank.R1) -> Piece(Color.White, PieceType.Rook),

modules/ui/build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
     id("scala")
-    id("org.scoverage") version "8.1"
+    id("org.scoverage")
     application
 }
 
@@ -55,10 +55,10 @@ dependencies {
     implementation(project(":modules:api"))
 
     // ScalaFX dependencies
-    implementation("org.scalafx:scalafx_3:21.0.0-R32")
+    implementation("org.scalafx:scalafx_3:${versions["SCALAFX"]!!}")
     
     // JavaFX dependencies for the current platform
-    val javaFXVersion = "21.0.1"
+    val javaFXVersion = versions["JAVAFX"]!!
     val osName = System.getProperty("os.name").lowercase()
     val platform = when {
         osName.contains("win") -> "win"
@@ -71,7 +71,7 @@ dependencies {
         implementation("org.openjfx:javafx-$module:$javaFXVersion:$platform")
     }
 
-    testImplementation(platform("org.junit:junit-bom:5.13.4"))
+    testImplementation(platform("org.junit:junit-bom:${versions["JUNIT_BOM"]!!}"))
     testImplementation("org.junit.jupiter:junit-jupiter")
     testImplementation("org.scalatest:scalatest_3:${versions["SCALATEST"]!!}")
     testImplementation("co.helmethair:scalatest-junit-runner:${versions["SCALATEST_JUNIT"]!!}")

modules/ui/src/main/scala/de/nowchess/ui/gui/ChessBoardView.scala

@@ -23,10 +23,11 @@ import de.nowchess.chess.notation.{FenExporter, FenParser, PgnExporter, PgnParse
 class ChessBoardView(val stage: Stage, private val engine: GameEngine) extends BorderPane:
   
   private val squareSize = 70.0
+  private val comicSansFontFamily = "Comic Sans MS"
   private val boardGrid = new GridPane()
   private val messageLabel = new Label {
     text = "Welcome!"
-    font = Font.font("Comic Sans MS", 16)
+    font = Font.font(comicSansFontFamily, 16)
     padding = Insets(10)
   }
   
@@ -45,7 +46,7 @@ class ChessBoardView(val stage: Stage, private val engine: GameEngine) extends B
     children = Seq(
       new Label {
         text = "Chess"
-        font = Font.font("Comic Sans MS", 24)
+        font = Font.font(comicSansFontFamily, 24)
         style = "-fx-font-weight: bold;"
       },
       messageLabel
@@ -69,17 +70,17 @@ class ChessBoardView(val stage: Stage, private val engine: GameEngine) extends B
         alignment = Pos.Center
         children = Seq(
           new Button("Undo") {
-            font = Font.font("Comic Sans MS", 12)
+            font = Font.font(comicSansFontFamily, 12)
             onAction = _ => if engine.canUndo then engine.undo()
             style = "-fx-background-radius: 8; -fx-background-color: #B9DAD1;"
           },
           new Button("Redo") {
-            font = Font.font("Comic Sans MS", 12)
+            font = Font.font(comicSansFontFamily, 12)
             onAction = _ => if engine.canRedo then engine.redo()
             style = "-fx-background-radius: 8; -fx-background-color: #B9C2DA;"
           },
           new Button("Reset") {
-            font = Font.font("Comic Sans MS", 12)
+            font = Font.font(comicSansFontFamily, 12)
             onAction = _ => engine.reset()
             style = "-fx-background-radius: 8; -fx-background-color: #E1EAA9;"
           }
@@ -90,22 +91,22 @@ class ChessBoardView(val stage: Stage, private val engine: GameEngine) extends B
         alignment = Pos.Center
         children = Seq(
           new Button("FEN Export") {
-            font = Font.font("Comic Sans MS", 12)
+            font = Font.font(comicSansFontFamily, 12)
             onAction = _ => doFenExport()
             style = "-fx-background-radius: 8; -fx-background-color: #DAC4B9;"
           },
           new Button("FEN Import") {
-            font = Font.font("Comic Sans MS", 12)
+            font = Font.font(comicSansFontFamily, 12)
             onAction = _ => doFenImport()
             style = "-fx-background-radius: 8; -fx-background-color: #DAD4B9;"
           },
           new Button("PGN Export") {
-            font = Font.font("Comic Sans MS", 12)
+            font = Font.font(comicSansFontFamily, 12)
             onAction = _ => doPgnExport()
             style = "-fx-background-radius: 8; -fx-background-color: #C4DAB9;"
           },
           new Button("PGN Import") {
-            font = Font.font("Comic Sans MS", 12)
+            font = Font.font(comicSansFontFamily, 12)
             onAction = _ => doPgnImport()
             style = "-fx-background-radius: 8; -fx-background-color: #B9DAC4;"
           }