From 6a5b40ff51e480c1204551074aa738fe593ada3d Mon Sep 17 00:00:00 2001
From: jbion <joffrey.bion@amadeus.com>
Date: Thu, 22 Dec 2016 18:45:48 +0100
Subject: Add CardBack for wonder stages display in the UI

---
 .../java/org/luxons/sevenwonders/game/Game.java    | 11 ++---
 .../org/luxons/sevenwonders/game/api/Table.java    | 13 +++---
 .../org/luxons/sevenwonders/game/boards/Board.java | 21 +++------
 .../sevenwonders/game/boards/BoardElementType.java |  4 +-
 .../org/luxons/sevenwonders/game/cards/Card.java   | 22 +++++++++-
 .../luxons/sevenwonders/game/cards/CardBack.java   | 14 ++++++
 .../sevenwonders/game/cards/Requirements.java      | 14 +++++-
 .../game/data/definitions/DecksDefinition.java     | 46 ++++++++++----------
 .../game/data/definitions/WonderDefinition.java    |  8 ++--
 .../data/definitions/WonderLevelDefinition.java    | 20 ---------
 .../data/definitions/WonderStageDefinition.java    | 20 +++++++++
 .../luxons/sevenwonders/game/wonders/Wonder.java   | 42 +++++++++++++++---
 .../sevenwonders/game/wonders/WonderLevel.java     | 34 ---------------
 .../sevenwonders/game/wonders/WonderStage.java     | 50 ++++++++++++++++++++++
 14 files changed, 199 insertions(+), 120 deletions(-)
 create mode 100644 src/main/java/org/luxons/sevenwonders/game/cards/CardBack.java
 delete mode 100644 src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderLevelDefinition.java
 create mode 100644 src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderStageDefinition.java
 delete mode 100644 src/main/java/org/luxons/sevenwonders/game/wonders/WonderLevel.java
 create mode 100644 src/main/java/org/luxons/sevenwonders/game/wonders/WonderStage.java

(limited to 'src/main/java/org/luxons')

diff --git a/src/main/java/org/luxons/sevenwonders/game/Game.java b/src/main/java/org/luxons/sevenwonders/game/Game.java
index 1fab129c..50481103 100644
--- a/src/main/java/org/luxons/sevenwonders/game/Game.java
+++ b/src/main/java/org/luxons/sevenwonders/game/Game.java
@@ -147,15 +147,16 @@ public class Game {
     }
 
     private void placeCard(Move move) {
+        Card card = decks.getCard(move.getCardName());
         switch (move.getType()) {
         case PLAY:
-            table.placeCard(move.getPlayerIndex(), decks.getCard(move.getCardName()));
+            table.placeCard(move.getPlayerIndex(), card);
             break;
         case UPGRADE_WONDER:
-            table.upgradeWonderStage(move.getPlayerIndex());
+            table.buildWonderStage(move.getPlayerIndex(), card.getBack());
             break;
         case DISCARD:
-            discardedCards.add(decks.getCard(move.getCardName()));
+            discardedCards.add(card);
             break;
         }
     }
@@ -173,10 +174,10 @@ public class Game {
     private void activateCard(Move move) {
         switch (move.getType()) {
         case PLAY:
-            table.activateCard(move.getPlayerIndex(), decks.getCard(move.getCardName()));
+            table.activateCard(move.getPlayerIndex(), decks.getCard(move.getCardName()), move.getBoughtResources());
             break;
         case UPGRADE_WONDER:
-            table.activateCurrentWonderStage(move.getPlayerIndex());
+            table.activateCurrentWonderStage(move.getPlayerIndex(), move.getBoughtResources());
             break;
         case DISCARD:
             table.discard(move.getPlayerIndex(), settings.getDiscardedCardGold());
diff --git a/src/main/java/org/luxons/sevenwonders/game/api/Table.java b/src/main/java/org/luxons/sevenwonders/game/api/Table.java
index 2ef27a2a..d906a5f1 100644
--- a/src/main/java/org/luxons/sevenwonders/game/api/Table.java
+++ b/src/main/java/org/luxons/sevenwonders/game/api/Table.java
@@ -5,6 +5,7 @@ import java.util.List;
 import org.luxons.sevenwonders.game.boards.Board;
 import org.luxons.sevenwonders.game.boards.RelativeBoardPosition;
 import org.luxons.sevenwonders.game.cards.Card;
+import org.luxons.sevenwonders.game.cards.CardBack;
 
 /**
  * The table contains what is visible by all the players in the game: the boards and their played cards, and the
@@ -52,18 +53,18 @@ public class Table {
         board.addCard(card);
     }
 
-    public void upgradeWonderStage(int playerIndex) {
+    public void buildWonderStage(int playerIndex, CardBack cardBack) {
         Board board = boards.get(playerIndex);
-        board.increaseWonderLevel();
+        board.buildWonderStage(cardBack);
     }
 
-    public void activateCard(int playerIndex, Card card) {
-        card.applyTo(this, playerIndex);
+    public void activateCard(int playerIndex, Card card, List<BoughtResources> boughtResources) {
+        card.applyTo(this, playerIndex, boughtResources);
     }
 
-    public void activateCurrentWonderStage(int playerIndex) {
+    public void activateCurrentWonderStage(int playerIndex, List<BoughtResources> boughtResources) {
         Board board = boards.get(playerIndex);
-        board.activateCurrentWonderLevel(this, playerIndex);
+        board.activateCurrentWonderLevel(this, playerIndex, boughtResources);
     }
 
     public void discard(int playerIndex, int goldBonus) {
diff --git a/src/main/java/org/luxons/sevenwonders/game/boards/Board.java b/src/main/java/org/luxons/sevenwonders/game/boards/Board.java
index c509ee3b..7e310979 100644
--- a/src/main/java/org/luxons/sevenwonders/game/boards/Board.java
+++ b/src/main/java/org/luxons/sevenwonders/game/boards/Board.java
@@ -5,8 +5,10 @@ import java.util.List;
 
 import org.luxons.sevenwonders.game.Player;
 import org.luxons.sevenwonders.game.Settings;
+import org.luxons.sevenwonders.game.api.BoughtResources;
 import org.luxons.sevenwonders.game.api.Table;
 import org.luxons.sevenwonders.game.cards.Card;
+import org.luxons.sevenwonders.game.cards.CardBack;
 import org.luxons.sevenwonders.game.cards.Color;
 import org.luxons.sevenwonders.game.resources.Production;
 import org.luxons.sevenwonders.game.wonders.Wonder;
@@ -27,8 +29,6 @@ public class Board {
 
     private int gold;
 
-    private int wonderLevel;
-
     private int nbWarSymbols;
 
     private int nbDefeatTokens;
@@ -36,7 +36,6 @@ public class Board {
     public Board(Wonder wonder, Player player, Settings settings) {
         this.wonder = wonder;
         this.player = player;
-        this.wonderLevel = 0;
         this.gold = settings.getInitialGold();
         this.tradingRules = new TradingRules(settings.getDefaultTradingCost());
         production.addFixedResource(wonder.getInitialResource(), 1);
@@ -86,20 +85,12 @@ public class Board {
         this.gold = amount;
     }
 
-    public int getWonderLevel() {
-        return wonderLevel;
-    }
-
-    public void increaseWonderLevel() {
-        int maxLevel = wonder.getLevels().size();
-        if (maxLevel == wonderLevel) {
-            throw new IllegalStateException("This wonder has already reached its maximum level");
-        }
-        this.wonderLevel++;
+    public void buildWonderStage(CardBack cardBack) {
+        wonder.buildLevel(cardBack);
     }
 
-    public void activateCurrentWonderLevel(Table table, int playerIndex) {
-        wonder.getLevels().get(wonderLevel).activate(table, playerIndex);
+    public void activateCurrentWonderLevel(Table table, int playerIndex, List<BoughtResources> boughtResources) {
+        wonder.activateLastBuiltStage(table, playerIndex, boughtResources);
     }
 
     public int getNbWarSymbols() {
diff --git a/src/main/java/org/luxons/sevenwonders/game/boards/BoardElementType.java b/src/main/java/org/luxons/sevenwonders/game/boards/BoardElementType.java
index 5c029331..d1fba60c 100644
--- a/src/main/java/org/luxons/sevenwonders/game/boards/BoardElementType.java
+++ b/src/main/java/org/luxons/sevenwonders/game/boards/BoardElementType.java
@@ -11,10 +11,10 @@ public enum BoardElementType {
             return board.getNbCardsOfColor(colors);
         }
     },
-    WONDER_LEVEL {
+    BUILT_WONDER_STAGES {
         @Override
         public int getElementCount(Board board, List<Color> colors) {
-            return board.getWonderLevel();
+            return board.getWonder().getNbBuiltStages();
         }
     },
     DEFEAT_TOKEN {
diff --git a/src/main/java/org/luxons/sevenwonders/game/cards/Card.java b/src/main/java/org/luxons/sevenwonders/game/cards/Card.java
index 148d7ed0..94c46839 100644
--- a/src/main/java/org/luxons/sevenwonders/game/cards/Card.java
+++ b/src/main/java/org/luxons/sevenwonders/game/cards/Card.java
@@ -3,6 +3,7 @@ package org.luxons.sevenwonders.game.cards;
 import java.util.List;
 import java.util.Objects;
 
+import org.luxons.sevenwonders.game.api.BoughtResources;
 import org.luxons.sevenwonders.game.api.Table;
 import org.luxons.sevenwonders.game.boards.Board;
 import org.luxons.sevenwonders.game.effects.Effect;
@@ -23,6 +24,8 @@ public class Card {
 
     private final String image;
 
+    private CardBack back;
+
     public Card(String name, Color color, Requirements requirements, List<Effect> effects, String chainParent,
             List<String> chainChildren, String image) {
         this.name = name;
@@ -58,6 +61,18 @@ public class Card {
         return chainChildren;
     }
 
+    public String getImage() {
+        return image;
+    }
+
+    public CardBack getBack() {
+        return back;
+    }
+
+    public void setBack(CardBack back) {
+        this.back = back;
+    }
+
     public boolean isChainableOn(Board board) {
         return board.isPlayed(chainParent);
     }
@@ -68,10 +83,13 @@ public class Card {
 
     public boolean isPlayable(Table table, int playerIndex) {
         Board board = table.getBoard(playerIndex);
-        return !board.isPlayed(name) && (isChainableOn(board) || requirements.isAffordedBy(table, playerIndex));
+        if (board.isPlayed(name)) {
+            return false; // cannot play twice the same card
+        }
+        return isChainableOn(board) || requirements.isAffordedBy(table, playerIndex);
     }
 
-    public void applyTo(Table table, int playerIndex) {
+    public void applyTo(Table table, int playerIndex, List<BoughtResources> boughtResources) {
         // TODO add paid resources cost deduction
         Board playerBoard = table.getBoard(playerIndex);
         if (!isChainableOn(playerBoard)) {
diff --git a/src/main/java/org/luxons/sevenwonders/game/cards/CardBack.java b/src/main/java/org/luxons/sevenwonders/game/cards/CardBack.java
new file mode 100644
index 00000000..f925b6c4
--- /dev/null
+++ b/src/main/java/org/luxons/sevenwonders/game/cards/CardBack.java
@@ -0,0 +1,14 @@
+package org.luxons.sevenwonders.game.cards;
+
+public class CardBack {
+
+    private final String image;
+
+    public CardBack(String image) {
+        this.image = image;
+    }
+
+    public String getImage() {
+        return image;
+    }
+}
diff --git a/src/main/java/org/luxons/sevenwonders/game/cards/Requirements.java b/src/main/java/org/luxons/sevenwonders/game/cards/Requirements.java
index e729fedc..714f86a6 100644
--- a/src/main/java/org/luxons/sevenwonders/game/cards/Requirements.java
+++ b/src/main/java/org/luxons/sevenwonders/game/cards/Requirements.java
@@ -1,5 +1,8 @@
 package org.luxons.sevenwonders.game.cards;
 
+import java.util.List;
+
+import org.luxons.sevenwonders.game.api.BoughtResources;
 import org.luxons.sevenwonders.game.api.Table;
 import org.luxons.sevenwonders.game.boards.Board;
 import org.luxons.sevenwonders.game.resources.Resources;
@@ -30,7 +33,16 @@ public class Requirements {
         return board.getGold() >= gold && board.getProduction().contains(resources);
     }
 
-    boolean isAffordedBy(Table table, int playerIndex) {
+    public boolean isAffordedBy(Table table, int playerIndex) {
+        Board board = table.getBoard(playerIndex);
+        if (isAffordedBy(board)) {
+            return true;
+        }
+        // TODO take into account resources buyable from neighbours
+        return false;
+    }
+
+    public boolean isAffordedBy(Table table, int playerIndex, List<BoughtResources> boughtResources) {
         Board board = table.getBoard(playerIndex);
         if (isAffordedBy(board)) {
             return true;
diff --git a/src/main/java/org/luxons/sevenwonders/game/data/definitions/DecksDefinition.java b/src/main/java/org/luxons/sevenwonders/game/data/definitions/DecksDefinition.java
index e50b6214..c95977f2 100644
--- a/src/main/java/org/luxons/sevenwonders/game/data/definitions/DecksDefinition.java
+++ b/src/main/java/org/luxons/sevenwonders/game/data/definitions/DecksDefinition.java
@@ -9,6 +9,7 @@ import java.util.stream.Collectors;
 
 import org.luxons.sevenwonders.game.Settings;
 import org.luxons.sevenwonders.game.cards.Card;
+import org.luxons.sevenwonders.game.cards.CardBack;
 import org.luxons.sevenwonders.game.cards.Decks;
 
 public class DecksDefinition implements Definition<Decks> {
@@ -19,58 +20,55 @@ public class DecksDefinition implements Definition<Decks> {
 
     private List<CardDefinition> age3;
 
-    private List<CardDefinition> guildCards;
+    private String age1Back;
 
-    public List<CardDefinition> getAge1() {
-        return age1;
-    }
+    private String age2Back;
 
-    public List<CardDefinition> getAge2() {
-        return age2;
-    }
+    private String age3Back;
 
-    public List<CardDefinition> getAge3() {
-        return age3;
-    }
-
-    public List<CardDefinition> getGuildCards() {
-        return guildCards;
-    }
+    private List<CardDefinition> guildCards;
 
     @Override
     public Decks create(Settings settings) {
         Map<Integer, List<Card>> cardsPerAge = new HashMap<>();
-        cardsPerAge.put(1, prepareStandardDeck(age1, settings));
-        cardsPerAge.put(2, prepareStandardDeck(age2, settings));
+        cardsPerAge.put(1, prepareStandardDeck(age1, settings, age1Back));
+        cardsPerAge.put(2, prepareStandardDeck(age2, settings, age2Back));
         cardsPerAge.put(3, prepareAge3Deck(settings));
         return new Decks(cardsPerAge);
     }
 
-    private static List<Card> prepareStandardDeck(List<CardDefinition> defs, Settings settings) {
-        List<Card> cards = createDeck(defs, settings);
+    private static List<Card> prepareStandardDeck(List<CardDefinition> defs, Settings settings, String backImage) {
+        CardBack back = new CardBack(backImage);
+        List<Card> cards = createDeck(defs, settings, back);
         Collections.shuffle(cards, settings.getRandom());
         return cards;
     }
 
     private List<Card> prepareAge3Deck(Settings settings) {
-        List<Card> age3deck = createDeck(age3, settings);
-        age3deck.addAll(createGuildCards(guildCards, settings));
+        CardBack back = new CardBack(age3Back);
+        List<Card> age3deck = createDeck(age3, settings, back);
+        age3deck.addAll(createGuildCards(settings, back));
         Collections.shuffle(age3deck, settings.getRandom());
         return age3deck;
     }
 
-    private static List<Card> createDeck(List<CardDefinition> defs, Settings settings) {
+    private static List<Card> createDeck(List<CardDefinition> defs, Settings settings, CardBack back) {
         List<Card> cards = new ArrayList<>();
         for (CardDefinition def : defs) {
             for (int i = 0; i < def.getCountPerNbPlayer().get(settings.getNbPlayers()); i++) {
-                cards.add(def.create(settings));
+                Card card = def.create(settings);
+                card.setBack(back);
+                cards.add(card);
             }
         }
         return cards;
     }
 
-    private static List<Card> createGuildCards(List<CardDefinition> defs, Settings settings) {
-        List<Card> guild = defs.stream().map((def) -> def.create(settings)).collect(Collectors.toList());
+    private List<Card> createGuildCards(Settings settings, CardBack back) {
+        List<Card> guild = guildCards.stream()
+                                     .map((def) -> def.create(settings))
+                                     .peek(c -> c.setBack(back))
+                                     .collect(Collectors.toList());
         Collections.shuffle(guild, settings.getRandom());
         return guild.subList(0, settings.getNbPlayers() + 2);
     }
diff --git a/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderDefinition.java b/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderDefinition.java
index 576f2bc2..4d0f411d 100644
--- a/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderDefinition.java
+++ b/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderDefinition.java
@@ -6,7 +6,7 @@ import java.util.stream.Collectors;
 import org.luxons.sevenwonders.game.Settings;
 import org.luxons.sevenwonders.game.resources.ResourceType;
 import org.luxons.sevenwonders.game.wonders.Wonder;
-import org.luxons.sevenwonders.game.wonders.WonderLevel;
+import org.luxons.sevenwonders.game.wonders.WonderStage;
 
 public class WonderDefinition implements Definition<Wonder> {
 
@@ -23,7 +23,7 @@ public class WonderDefinition implements Definition<Wonder> {
 
         WonderSideDefinition wonderSideDef = pickSide(settings);
         wonder.setInitialResource(wonderSideDef.getInitialResource());
-        wonder.setLevels(wonderSideDef.createStages(settings));
+        wonder.setStages(wonderSideDef.createStages(settings));
         wonder.setImage(wonderSideDef.getImage());
         return wonder;
     }
@@ -42,7 +42,7 @@ public class WonderDefinition implements Definition<Wonder> {
 
         private ResourceType initialResource;
 
-        private List<WonderLevelDefinition> stages;
+        private List<WonderStageDefinition> stages;
 
         private String image;
 
@@ -50,7 +50,7 @@ public class WonderDefinition implements Definition<Wonder> {
             return initialResource;
         }
 
-        List<WonderLevel> createStages(Settings settings) {
+        List<WonderStage> createStages(Settings settings) {
             return stages.stream().map(def -> def.create(settings)).collect(Collectors.toList());
         }
 
diff --git a/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderLevelDefinition.java b/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderLevelDefinition.java
deleted file mode 100644
index 6064734c..00000000
--- a/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderLevelDefinition.java
+++ /dev/null
@@ -1,20 +0,0 @@
-package org.luxons.sevenwonders.game.data.definitions;
-
-import org.luxons.sevenwonders.game.Settings;
-import org.luxons.sevenwonders.game.cards.Requirements;
-import org.luxons.sevenwonders.game.wonders.WonderLevel;
-
-public class WonderLevelDefinition implements Definition<WonderLevel> {
-
-    private Requirements requirements;
-
-    private EffectsDefinition effects;
-
-    @Override
-    public WonderLevel create(Settings settings) {
-        WonderLevel level = new WonderLevel();
-        level.setRequirements(requirements);
-        level.setEffects(effects.create(settings));
-        return level;
-    }
-}
diff --git a/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderStageDefinition.java b/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderStageDefinition.java
new file mode 100644
index 00000000..7a866e05
--- /dev/null
+++ b/src/main/java/org/luxons/sevenwonders/game/data/definitions/WonderStageDefinition.java
@@ -0,0 +1,20 @@
+package org.luxons.sevenwonders.game.data.definitions;
+
+import org.luxons.sevenwonders.game.Settings;
+import org.luxons.sevenwonders.game.cards.Requirements;
+import org.luxons.sevenwonders.game.wonders.WonderStage;
+
+public class WonderStageDefinition implements Definition<WonderStage> {
+
+    private Requirements requirements;
+
+    private EffectsDefinition effects;
+
+    @Override
+    public WonderStage create(Settings settings) {
+        WonderStage stage = new WonderStage();
+        stage.setRequirements(requirements);
+        stage.setEffects(effects.create(settings));
+        return stage;
+    }
+}
diff --git a/src/main/java/org/luxons/sevenwonders/game/wonders/Wonder.java b/src/main/java/org/luxons/sevenwonders/game/wonders/Wonder.java
index b5698508..d739354a 100644
--- a/src/main/java/org/luxons/sevenwonders/game/wonders/Wonder.java
+++ b/src/main/java/org/luxons/sevenwonders/game/wonders/Wonder.java
@@ -3,6 +3,9 @@ package org.luxons.sevenwonders.game.wonders;
 import java.util.Arrays;
 import java.util.List;
 
+import org.luxons.sevenwonders.game.api.BoughtResources;
+import org.luxons.sevenwonders.game.api.Table;
+import org.luxons.sevenwonders.game.cards.CardBack;
 import org.luxons.sevenwonders.game.resources.ResourceType;
 
 public class Wonder {
@@ -11,17 +14,17 @@ public class Wonder {
 
     private ResourceType initialResource;
 
-    private List<WonderLevel> levels;
+    private List<WonderStage> stages;
 
     private String image;
 
     public Wonder() {
     }
 
-    public Wonder(String name, ResourceType initialResource, WonderLevel... levels) {
+    public Wonder(String name, ResourceType initialResource, WonderStage... stages) {
         this.name = name;
         this.initialResource = initialResource;
-        this.levels = Arrays.asList(levels);
+        this.stages = Arrays.asList(stages);
     }
 
     public String getName() {
@@ -40,12 +43,16 @@ public class Wonder {
         this.initialResource = initialResource;
     }
 
-    public List<WonderLevel> getLevels() {
-        return levels;
+    public List<WonderStage> getStages() {
+        return stages;
     }
 
-    public void setLevels(List<WonderLevel> levels) {
-        this.levels = levels;
+    public void setStages(List<WonderStage> stages) {
+        this.stages = stages;
+    }
+
+    public int getNbBuiltStages() {
+        return (int)stages.stream().filter(WonderStage::isBuilt).count();
     }
 
     public String getImage() {
@@ -55,4 +62,25 @@ public class Wonder {
     public void setImage(String image) {
         this.image = image;
     }
+
+    public void buildLevel(CardBack cardBack) {
+        getNextStage().build(cardBack);
+    }
+
+    private WonderStage getNextStage() {
+        int nextLevel = getNbBuiltStages();
+        if (nextLevel == stages.size()) {
+            throw new IllegalStateException("This wonder has already reached its maximum level");
+        }
+        return stages.get(nextLevel);
+    }
+
+    public void activateLastBuiltStage(Table table, int playerIndex, List<BoughtResources> boughtResources) {
+        getLastBuiltStage().activate(table, playerIndex, boughtResources);
+    }
+
+    private WonderStage getLastBuiltStage() {
+        int lastLevel = getNbBuiltStages() - 1;
+        return stages.get(lastLevel);
+    }
 }
diff --git a/src/main/java/org/luxons/sevenwonders/game/wonders/WonderLevel.java b/src/main/java/org/luxons/sevenwonders/game/wonders/WonderLevel.java
deleted file mode 100644
index 00b7d984..00000000
--- a/src/main/java/org/luxons/sevenwonders/game/wonders/WonderLevel.java
+++ /dev/null
@@ -1,34 +0,0 @@
-package org.luxons.sevenwonders.game.wonders;
-
-import java.util.List;
-
-import org.luxons.sevenwonders.game.api.Table;
-import org.luxons.sevenwonders.game.cards.Requirements;
-import org.luxons.sevenwonders.game.effects.Effect;
-
-public class WonderLevel {
-
-    private Requirements requirements;
-
-    private List<Effect> effects;
-
-    public Requirements getRequirements() {
-        return requirements;
-    }
-
-    public void setRequirements(Requirements requirements) {
-        this.requirements = requirements;
-    }
-
-    public List<Effect> getEffects() {
-        return effects;
-    }
-
-    public void setEffects(List<Effect> effects) {
-        this.effects = effects;
-    }
-
-    public void activate(Table table, int playerIndex) {
-        effects.forEach(e -> e.apply(table, playerIndex));
-    }
-}
diff --git a/src/main/java/org/luxons/sevenwonders/game/wonders/WonderStage.java b/src/main/java/org/luxons/sevenwonders/game/wonders/WonderStage.java
new file mode 100644
index 00000000..00a53fb1
--- /dev/null
+++ b/src/main/java/org/luxons/sevenwonders/game/wonders/WonderStage.java
@@ -0,0 +1,50 @@
+package org.luxons.sevenwonders.game.wonders;
+
+import java.util.List;
+
+import org.luxons.sevenwonders.game.api.BoughtResources;
+import org.luxons.sevenwonders.game.api.Table;
+import org.luxons.sevenwonders.game.cards.CardBack;
+import org.luxons.sevenwonders.game.cards.Requirements;
+import org.luxons.sevenwonders.game.effects.Effect;
+
+public class WonderStage {
+
+    private Requirements requirements;
+
+    private List<Effect> effects;
+
+    private CardBack cardBack;
+
+    public Requirements getRequirements() {
+        return requirements;
+    }
+
+    public void setRequirements(Requirements requirements) {
+        this.requirements = requirements;
+    }
+
+    public List<Effect> getEffects() {
+        return effects;
+    }
+
+    public void setEffects(List<Effect> effects) {
+        this.effects = effects;
+    }
+
+    public boolean isBuilt() {
+        return cardBack != null;
+    }
+
+    public boolean isBuildable(Table table, int playerIndex, List<BoughtResources> boughtResources) {
+        return requirements.isAffordedBy(table, playerIndex, boughtResources);
+    }
+
+    void build(CardBack cardBack) {
+        this.cardBack = cardBack;
+    }
+
+    void activate(Table table, int playerIndex, List<BoughtResources> boughtResources) {
+        effects.forEach(e -> e.apply(table, playerIndex));
+    }
+}
-- 
cgit