feat: Winnable and some minor changes

backend/src/main/java/cz/jzitnik/chronos/controllers/GameController.java

@@ -81,4 +81,13 @@ public class GameController {
 
         return ResponseEntity.ok(UnifiedResponse.success(TestGameKeyResponse.WORKING));
     }
+
+    @GetMapping("/winnable")
+    @CheckUser
+    public ResponseEntity<UnifiedResponse<Boolean, Error>> winnable(@RequestParam String playerKey) {
+        var player = playerRepository.findByPlayerKey(playerKey).get();
+        var game = player.getGame();
+
+        return ResponseEntity.ok(UnifiedResponse.success(game.winnable()));
+    }
 }

backend/src/main/java/cz/jzitnik/chronos/entities/Game.java

@@ -44,4 +44,33 @@ public class Game {
     public void addPlayer(Player player) {
         this.players.add(player);
     }
+
+    @JsonIgnore
+    public boolean winnable() {
+        var ownedFragments = 0;
+        for (Player player : players) {
+            for (Item item : player.getInventory()) {
+                if (item.getItemType() == ItemType.KEY_FRAGMENT) {
+                    ownedFragments++;
+                }
+            }
+        }
+
+
+        var roomItems = 0;
+        var characters = new ArrayList<Character>();
+
+        for (Room room : rooms) {
+            characters.addAll(room.getCharacters());
+            for (Item item : room.getItems()) {
+                if (item.getItemType() == ItemType.KEY_FRAGMENT) {
+                    roomItems++;
+                }
+            }
+        }
+
+        var unplayedCharacters = characters.stream().filter(character -> !character.isInteractedWith()).toList().size();
+
+        return roomItems + unplayedCharacters + ownedFragments >= 5;
+    }
 }

backend/src/main/java/cz/jzitnik/chronos/interactions/list/Hangman.java

@@ -152,7 +152,7 @@ public class Hangman implements InteractionPlayer {
         var incorrectGuessesSet = interactionMemory.getIncorrectGuessesSet();
         StringBuilder currentProgress = new StringBuilder(interactionMemory.getCurrentProgress());
 
-        if (data == null || data.isEmpty()) {
+        if (data.isEmpty()) {
             return new InteractionResponse(false, "invalid_input", new ArrayList<>());
         }
 

backend/src/main/java/cz/jzitnik/chronos/interactions/list/Mayor.java

@@ -7,6 +7,7 @@ import cz.jzitnik.chronos.entities.Player;
 import cz.jzitnik.chronos.interactions.InteractionPlayer;
 import cz.jzitnik.chronos.payload.responses.InteractionResponse;
 import cz.jzitnik.chronos.repository.CharacterRepository;
+import cz.jzitnik.chronos.repository.ItemRepository;
 import cz.jzitnik.chronos.services.ItemService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -19,6 +20,8 @@ public class Mayor implements InteractionPlayer {
     private ItemService itemService;
     @Autowired
     private CharacterRepository characterRepository;
+    @Autowired
+    private ItemRepository itemRepository;
 
     @Override
     public InteractionResponse play(Player player, Character character, String data) {
@@ -30,10 +33,12 @@ public class Mayor implements InteractionPlayer {
         }
 
         var golderWatch = golderWatches.getFirst();
+        golderWatch.setOwner(null);
+        itemRepository.save(golderWatch);
         playerItems.remove(golderWatch);
 
         var item = new Item(ItemType.KEY_FRAGMENT, player);
-        itemService.addItem(player, item); // itemRepository.save is ran by this function so we don't need to save the player when we removed the item from his inv
+        itemService.addItem(player, item);
 
         character.setInteractedWith(true);
         characterRepository.save(character);