Improve domain (WIP)

composeApp/src/commonMain/kotlin/domain/Game.kt

@@ -1,5 +1,7 @@
 package domain
 
+const val PUZZLE_SIZE = 6
+
 class Game(
     val categories: List<ItemCategory>,
     val grid: Grid,

composeApp/src/commonMain/kotlin/domain/generator.kt

@@ -0,0 +1,15 @@
+package domain
+
+fun generateGame(): Game {
+    // Here's a simple algorithm making use of your solver:
+    // 1. Generate a random puzzle instance.
+    // 2. Build a set C of all possible clues that pertain to this puzzle instance. (There are a finite and in fact quite small number of possible clues: for example if there are 5 houses, there are 5 possible clues of the form "Person A lives in house B", 8 possible clues of the form "Person A lives next to house B", and so on.)
+    // 3. Pick a random permutation c1, c2, ..., cn of the clues in C.
+    // 4. Set i = 1.
+    // 5. If i > n, we are done. The set C of clues is minimal.
+    // 6. Let D = C − { ci }. Run your solver on the set D of clues and count the number of possible solutions.
+    // 7. If there is exactly one solution, set C = D.
+    // 8. Set i = i + 1 and go back to step 5.
+    // (You can speed this up by removing clues in batches rather than one at a time, but it makes the algorithm more complicated to describe.)
+    TODO()
+}

composeApp/src/commonMain/kotlin/domain/grid.kt

@@ -8,14 +8,14 @@ class GameRow(
 class Grid(
     val rows: List<GameRow>
 ) : List<GameRow> by rows {
-    fun indexOf(element: Item): Int {
+    fun indexOf(element: ItemClass): Int {
         val row = rows.first { it.category == element.category }
         return row.indexOfFirst { it.selection == element }
     }
 }
 
 class GameCell(
-    var selection: Item?,
-    val solution: Item,
-    val options: List<Item>
+    var selection: ItemClass?,
+    val solution: ItemClass,
+    val options: List<ItemClass>
 )

composeApp/src/commonMain/kotlin/domain/items.kt

@@ -1,44 +1,105 @@
-@file:OptIn(ExperimentalResourceApi::class)
-
 package domain
 
-import org.jetbrains.compose.resources.DrawableResource
-import org.jetbrains.compose.resources.ExperimentalResourceApi
+enum class Animals(symbol: String) : ItemClass {
+    ZEBRA("🦓"),
+    OCTOPUS("🐙"),
+    GOAT("🐐"),
+    SLOTH("🦥"),
+    DOG("🐕"),
+    SNAIL("🐌"),
+    ANT("🐜");
 
-fun category(block: CategoryContext.() -> Unit): ItemCategory {
-    class CategoryImpl(val items: MutableList<ItemImpl>) :
-        ItemCategory, List<Item> by items {
-        inner class ItemImpl(
-            override val image: DrawableResource
-        ) : Item {
-            override val category: CategoryImpl = this@CategoryImpl
-
-            init {
-                items.add(this)
-            }
-        }
-    }
-
-    val ctx = object : CategoryContext {
-        val category = CategoryImpl(mutableListOf())
-
-        override fun item(image: DrawableResource) {
-            category.ItemImpl(image)
-        }
-    }
-    ctx.block()
-    return ctx.category
+    override val symbols: Array<String> = arrayOf(symbol)
 }
 
-interface CategoryContext {
-    fun item(image: DrawableResource)
+enum class Nationality(symbol: String) : ItemClass {
+    ENGLAND("🇬🇧"),
+    UKRAINE("🇺🇦"),
+    SPAIN("🇪🇸"),
+    NORWAY("🇳🇴"),
+    JAPAN("🇯🇵"),
+    SWITZERLAND("🇨🇭"),
+    CANADA("🇨🇦");
+
+    override val symbols: Array<String> = arrayOf(symbol)
 }
 
-interface Item {
-    val category: ItemCategory
+enum class Drink(symbol: String) : ItemClass {
+    MILK("🥛"),
+    WINE("🍷"),
+    COCKTAIL("🍸"),
+    COFFEE("☕"),
+    TEA("🍵"),
+    BEER("🍺"),
+    BEVERAGE("🧃");
 
-    @OptIn(ExperimentalResourceApi::class)
-    val image: DrawableResource
+    override val symbols: Array<String> = arrayOf(symbol)
 }
 
-interface ItemCategory : List<Item>
+enum class Profession(symbol: String) : ItemClass {
+    ASTRONAUT("\u200D\uD83D\uDE80"),
+    HEALTH_WORKER("\u200D⚕\uFE0F"),
+    FARMER("\u200D\uD83C\uDF3E"),
+    ROCK_STAR("\u200D\uD83C\uDFA4"),
+    SCIENTIST("\u200D\uD83D\uDD2C"),
+    SOFTWARE_DEV("\u200D\uD83D\uDCBB"),
+    FIREFIGHTER("\u200D\uD83D\uDE92"),
+    TEACHER("\u200D\uD83C\uDFEB");
+
+    override val symbols: Array<String> = idic(symbol)
+}
+
+enum class Fruit(symbol: String) : ItemClass {
+    GRAPES("🍇"),
+    WATERMELON("🍉"),
+    LEMON("🍋"),
+    BANANA("🍌"),
+    PINEAPPLE("🍍"),
+    CHERRIES("🍒"),
+    STRAWBERRY("🍓"),
+    KIWI("🥝"),
+    PEAR("🍐"),
+    MANGO("🥭");
+
+    override val symbols: Array<String> = idic(symbol)
+}
+
+enum class Dessert(symbol: String) : ItemClass {
+    ICE_CREAM("🍨"),
+    DOUGHNUT("🍩"),
+    COOKIE("🍪"),
+    CAKE("🍰"),
+    CUPCAKE("🧁"),
+    PIE("🥧"),
+    CHOCOLATE("🍫"),
+    LOLLIPOP("🍭"),
+    CUSTARD("🍮");
+
+    override val symbols: Array<String> = idic(symbol)
+}
+
+enum class Transportation(symbol: String) : ItemClass {
+    BICYCLE("🚲"),
+    MOTOR_SCOOTER("🛵"),
+    SKATEBOARD("🛹"),
+    TAXI("🚕"),
+    LOCOMOTIVE("🚂"),
+    TRAM_CAR("🚋"),
+    BUS("🚌");
+
+    override val symbols: Array<String> = idic(symbol)
+}
+
+private val GENDERS = arrayOf("\uD83E\uDDD1", "\uD83D\uDC68", "\uD83D\uDC69")
+private val SKIN_TONES =
+    arrayOf("\uD83C\uDFFB", "\uD83C\uDFFC", "\uD83C\uDFFD", "\uD83C\uDFFE", "\uD83C\uDFFF")
+
+private fun idic(symbol: String) = Array<String>(GENDERS.size * SKIN_TONES.size) { i ->
+    val g = GENDERS[i % GENDERS.size]
+    val t = SKIN_TONES[i / GENDERS.size]
+    g + t + symbol
+}
+
+sealed interface ItemClass {
+    val symbols: Array<String>
+}

composeApp/src/commonMain/kotlin/domain/rules.kt

@@ -8,7 +8,7 @@ sealed class GameRule {
 
 sealed class HorizontalRule : GameRule()
 
-class NeighbourRule(val a: Item, val b: Item) : HorizontalRule() {
+class NeighbourRule(val a: ItemClass, val b: ItemClass) : HorizontalRule() {
     override fun isRuleViolated(grid: Grid): Boolean {
         val ia = grid.indexOf(a)
         val ib = grid.indexOf(b)
@@ -19,7 +19,7 @@ class NeighbourRule(val a: Item, val b: Item) : HorizontalRule() {
     }
 }
 
-class OrderRule(val left: Item, val right: Item) : HorizontalRule() {
+class OrderRule(val left: ItemClass, val right: ItemClass) : HorizontalRule() {
     override fun isRuleViolated(grid: Grid): Boolean {
         val il = grid.indexOf(left)
         val ir = grid.indexOf(right)
@@ -30,7 +30,7 @@ class OrderRule(val left: Item, val right: Item) : HorizontalRule() {
     }
 }
 
-class TripletRule(val a: Item, val b: Item, val c: Item) : HorizontalRule() {
+class TripletRule(val a: ItemClass, val b: ItemClass, val c: ItemClass) : HorizontalRule() {
     private fun isNeighbourRuleViolated(ix: Int, iy: Int): Boolean {
         if (ix == -1 || iy == -1) return false
         return abs(ix - iy) != 1
@@ -57,7 +57,7 @@ class TripletRule(val a: Item, val b: Item, val c: Item) : HorizontalRule() {
     }
 }
 
-class VerticalRule(val a: Item, val b: Item) : GameRule() {
+class VerticalRule(val a: ItemClass, val b: ItemClass) : GameRule() {
     override fun isRuleViolated(grid: Grid): Boolean {
         val ia = grid.indexOf(a)
         val ib = grid.indexOf(b)

composeApp/src/commonMain/kotlin/ui/selector.kt

@@ -3,11 +3,11 @@ package ui
 import androidx.compose.material3.OutlinedCard
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
-import domain.Item
+import domain.ItemClass
 import domain.ItemCategory
 
 @Composable
-fun Selector(modifier: Modifier = Modifier, category: ItemCategory, selectedItem: Item, onSelectItem: (Item) -> Unit) {
+fun Selector(modifier: Modifier = Modifier, category: ItemCategory, selectedItem: ItemClass, onSelectItem: (ItemClass) -> Unit) {
     OutlinedCard(modifier = modifier) {
 
     }