7 files changed, 138 insertions, 37 deletions
diff --git a/README.md b/README.md
index b3de1f7..e5338a9 100644
--- a/README.md
+++ b/README.md
@@ -16,33 +16,26 @@ Start the game with `/molehunt start` and enjoy!
 
 Every player has the same skin.
 
-Players' nametag are disabled.
+Players' nametags are disabled.
 
-The tab, the chat and all message commands (`/msg`, `/tell` and `/w`) are disabled.
+The player list, the chat and the message commands (`/msg`, `/tell` and `/w`) are disabled.
 
 Death and advancement messages are disabled.
 
-Stop the game when every innocent is dead or when the timer ended (one hour and half).
+World borders are set when starting and slowly shrink over the entire game.
+
+The mod stops the game when every innocent is dead or when the timer ended.
 
 The moles can see the name of other moles with `/molehunt moles`.
 
-## Configuration
+_Almost_ everything in the mod can configured.
 
-You can configure every text line and the skin with a resource pack (for reference, check out 
-[the default lang file](src/client/resources/assets/molehunt/lang/en_us.json) and [the default
-skin file](src/client/resources/assets/molehunt/textures/skin.png)).
+## Configuration
 
-Also, more server-side values can be changed in the configuration file, located in your server config directory.
-These settings will be applied by default to every new world.
-If you want to customize only one world, use the gamerules.
+To change most values, you can play with the gamerules added by the mod with the 
+`/gamerule` command. Every gamerule introduced by the mod starts with `molehunt:`.
 
-Every setting can be modified in game with these gamerules:
-- `molehunt:gameDuration`
-- `molehunt:molePercentage`
-- `molehunt:moleCount`
-- `molehunt:showNametags`
-- `molehunt:showTab`
-- `molehunt:showSkins`
+To dive deeper into the configuration, [an online wiki is available](https://www.anhgelus.world/molehunt/configuration.html).
 
 ## Technologies
 
@@ -52,6 +45,6 @@ Every setting can be modified in game with these gamerules:
 
 ## Credits
 
-Creator of the skin used is unknown.
+Creator of the default skin used is unknown.
 
 Thanks @leo-210 for the help!
diff --git a/Writerside/topics/configuration.md b/Writerside/topics/configuration.md
index e6fc92a..41c4ff4 100644
--- a/Writerside/topics/configuration.md
+++ b/Writerside/topics/configuration.md
@@ -6,6 +6,7 @@ The second one modifies the default settings of all your worlds.
 
 ## Common concept
 
+### Molehunt game configuration :
 - Game's duration: `game_duration` (or `gameDuration`). 
 Sets the game's duration in minutes (default: 90).
 - Percentage of mole: `mole_percentage` (or `molePercentage`).
@@ -13,6 +14,8 @@ Sets the percentage of mole (default: 25).
 - Number of mole: `mole_count` (or `moleCount`). 
 Sets the number of mole (default: -1).
 If you want to use the percentage of mole instead, set this value to -1.
+
+### Client-side settings (applies to all players) :
 - Enable players' nametag: `show_nametags` (or `showNametags`).
 Players' nametag is visible (default: false).
 - Enable players' skin: `show_skins` (or `showSkins`).
@@ -20,6 +23,11 @@ Players' skin is visible (default: false).
 - Enable tab: `show_tab` (or `showTab`).
 Tab can be used (default: false).
 
+### World-border settings :
+- World border size when starting the game : `initial_world_size` (or `initialWorldSize`).
+- Target border size on the end of the game : `final_world_size` (or `finalWorldSize`).
+- Time before moving the borders : `border_moving_starting_time_offset` (or `borderMovingStartingTimeOffsetMinutes`).
+
 Every clientside rules (nametag, skin and tab) are only used by the client during a game.
 Before and after the game, they are not used.
 
@@ -41,6 +49,9 @@ This is `molehunt.properties`.
 
 ```ini
 # Molehunt mod configuration file
+# To regenerate the default configuration, delete, move or rename this file.
+
+# Game settings
 
 # The duration of a molehunt game, in minutes.
 # Default: 90 minutes (1 hour 30 minutes).
@@ -57,6 +68,9 @@ mole_percentage = 25
 # Default: -1.
 mole_count = -1
 
+
+# Client-side settings (applies to all players)
+
 # Show nametags
 # Default: false
 show_nametags = false
@@ -68,4 +82,21 @@ show_skins = false
 # Show tab
 # Default: false
 show_tab = false
+
+
+# World border settings :
+
+# Initial world size (in blocks).
+# Default: 200 blocks.
+initial_world_size = 200
+
+# Final world size (in blocks).
+# Default: 50 blocks.
+final_world_size = 50
+
+# Shrinking starting offset (in minutes)
+# The time before starting to shrink the world borders.
+# If this value is greater than the game duration, borders will never shrink.
+# Default: 10 minutes.
+border_shrinking_starting_time_offset = 10
 ```
diff --git a/src/client/resources/assets/molehunt/lang/en_us.json b/src/client/resources/assets/molehunt/lang/en_us.json
index 3a50d81..5896c03 100644
--- a/src/client/resources/assets/molehunt/lang/en_us.json
+++ b/src/client/resources/assets/molehunt/lang/en_us.json
@@ -12,11 +12,15 @@
   "molehunt.game.start.suspense": "§eYou are...",
   "molehunt.game.start.mole.title": "§cThe Mole!",
   "molehunt.game.start.mole.subtitle": "§eGet the list of moles with §6/molehunt moles",
-  "molehunt.game.start.survivor": "§aNot the Mole!",
-  "gamerule.molehunt:gameDuration": "Duration of a game",
-  "gamerule.molehunt:molePercentage": "Percentage of Mole",
-  "gamerule.molehunt:moleCount": "Number of Mole",
-  "gamerule.molehunt:showNametags": "Show players' nametag",
-  "gamerule.molehunt:showTab": "Enable the tab",
-  "gamerule.molehunt:showSkins": "Show players' skin"
+  "molehunt.game.start.survivor.title": "§aNot the Mole!",
+  "molehunt.game.start.survivor.subtitle": "§eTry to survive and find out who's the mole!",
+  "gamerule.molehunt:gameDuration": "Molehunt: Duration of a game",
+  "gamerule.molehunt:molePercentage": "Molehunt: Percentage of Mole",
+  "gamerule.molehunt:moleCount": "Molehunt: Number of Mole",
+  "gamerule.molehunt:showNametags": "Molehunt: Show players' nametag",
+  "gamerule.molehunt:showTab": "Molehunt: Enable the tab",
+  "gamerule.molehunt:showSkins": "Molehunt: Show players' skin",
+  "gamerule.molehunt:initialWorldSize": "Molehunt: Initial world size",
+  "gamerule.molehunt:finalWorldSize": "Molehunt: Final world size",
+  "gamerule.molehunt:borderMovingStartingTimeOffsetMinutes": "Molehunt: Time before moving the borders"
 }
 \ No newline at end of file
diff --git a/src/client/resources/assets/molehunt/lang/fr_fr.json b/src/client/resources/assets/molehunt/lang/fr_fr.json
index bb73ca8..42b4722 100644
--- a/src/client/resources/assets/molehunt/lang/fr_fr.json
+++ b/src/client/resources/assets/molehunt/lang/fr_fr.json
@@ -12,11 +12,15 @@
   "molehunt.game.start.suspense": "§eVous êtes...",
   "molehunt.game.start.mole.title": "§cLa Taupe !",
   "molehunt.game.start.mole.subtitle": "§eRécupérer la liste des taupes avec §6/molehunt moles",
-  "molehunt.game.start.survivor": "§aPas la Taupe!",
-  "gamerule.molehunt:gameDuration": "Durée d'une partie",
-  "gamerule.molehunt:molePercentage": "Pourcentage de Taupes",
-  "gamerule.molehunt:moleCount": "Nombre de Taupes",
-  "gamerule.molehunt:showNametags": "Affiche les nametags des joueurs",
-  "gamerule.molehunt:showTab": "Active le tab",
-  "gamerule.molehunt:showSkins": "Affiche les skins des joueurs"
+  "molehunt.game.start.survivor.title": "§aPas la taupe!",
+  "molehunt.game.start.survivor.subtitle": "§eEssaye de survivre et de trouver qui est la taupe !",
+  "gamerule.molehunt:gameDuration": "Molehunt : Durée d'une partie",
+  "gamerule.molehunt:molePercentage": "Molehunt : Pourcentage de Taupes",
+  "gamerule.molehunt:moleCount": "Molehunt : Nombre de Taupes",
+  "gamerule.molehunt:showNametags": "Molehunt : Affiche les nametags des joueurs",
+  "gamerule.molehunt:showTab": "Molehunt : Active la liste des joueurs",
+  "gamerule.molehunt:showSkins": "Molehunt : Affiche les skins des joueurs",
+  "gamerule.molehunt:initialWorldSize": "Molehunt : Taille initiale du monde",
+  "gamerule.molehunt:finalWorldSize": "Molehunt : Taille finale du monde",
+  "gamerule.molehunt:borderMovingStartingTimeOffsetMinutes": "Molehunt : Temps avant de bouger les bordures du monde"
 }
 \ No newline at end of file
diff --git a/src/main/java/world/anhgelus/molehunt/Molehunt.java b/src/main/java/world/anhgelus/molehunt/Molehunt.java
index afd6960..52399dc 100644
--- a/src/main/java/world/anhgelus/molehunt/Molehunt.java
+++ b/src/main/java/world/anhgelus/molehunt/Molehunt.java
@@ -41,7 +41,7 @@ public class Molehunt implements ModInitializer {
     public static final SimpleConfig CONFIG_FILE = Config.configFile(MOD_ID);
 
     public static final GameRules.Key<GameRules.IntRule> GAME_DURATION = GameRuleRegistry.register(
-            MOD_ID +":gameDuration",
+            MOD_ID +":gameDurationMinutes",
             GameRules.Category.MISC,
             GameRuleFactory.createIntRule(CONFIG_FILE.getOrDefault("game_duration", 90))
     );
@@ -79,6 +79,21 @@ public class Molehunt implements ModInitializer {
                 CONFIG.sendConfigPayload();
             })
     );
+    public static final GameRules.Key<GameRules.IntRule> INITIAL_WORLD_SIZE = GameRuleRegistry.register(
+            MOD_ID +":initialWorldSize",
+            GameRules.Category.MISC,
+            GameRuleFactory.createIntRule(CONFIG_FILE.getOrDefault("initial_world_size", 200), 0)
+    );
+    public static final GameRules.Key<GameRules.IntRule> FINAL_WORLD_SIZE = GameRuleRegistry.register(
+            MOD_ID +":finalWorldSize",
+            GameRules.Category.MISC,
+            GameRuleFactory.createIntRule(CONFIG_FILE.getOrDefault("final_world_size", 50), 0)
+    );
+    public static final GameRules.Key<GameRules.IntRule> MOVING_STARTING_TIME_OFFSET = GameRuleRegistry.register(
+            MOD_ID +":borderMovingStartingTimeOffsetMinutes",
+            GameRules.Category.MISC,
+            GameRuleFactory.createIntRule(CONFIG_FILE.getOrDefault("border_moving_starting_time_offset", 10), 0)
+    );
 
     public Game game;
 
diff --git a/src/main/java/world/anhgelus/molehunt/config/Config.java b/src/main/java/world/anhgelus/molehunt/config/Config.java
index dbaebcf..e1c84a4 100644
--- a/src/main/java/world/anhgelus/molehunt/config/Config.java
+++ b/src/main/java/world/anhgelus/molehunt/config/Config.java
@@ -16,9 +16,7 @@ public class Config {
 
     public void sendConfigPayload() {
         final var payload = new ConfigPayload(areNametagsEnabled(), areSkinsEnabled(), isTabEnabled());
-        server.getPlayerManager().getPlayerList().forEach(p -> {
-            ServerPlayNetworking.send(p, payload);
-        });
+        server.getPlayerManager().getPlayerList().forEach(p -> ServerPlayNetworking.send(p, payload));
     }
 
     public void sendConfigPayload(boolean showNametags, boolean showSkins, boolean showTab) {
@@ -50,6 +48,18 @@ public class Config {
         return server.getGameRules().getBoolean(Molehunt.SHOW_TAB);
     }
 
+    public int getInitialWorldSize() {
+        return server.getGameRules().getInt(Molehunt.INITIAL_WORLD_SIZE);
+    }
+
+    public int getFinalWorldSize() {
+        return server.getGameRules().getInt(Molehunt.FINAL_WORLD_SIZE);
+    }
+
+    public int getBorderShrinkingStartingTimeOffset() {
+        return server.getGameRules().getInt(Molehunt.MOVING_STARTING_TIME_OFFSET);
+    }
+
     public static SimpleConfig configFile(String fileName) {
         return SimpleConfig.of(fileName).provider(Config::defaultConfig).request();
     }
@@ -57,7 +67,10 @@ public class Config {
     private static String defaultConfig(String s) {
         return """
                 # Molehunt mod configuration file
+                # To regenerate the default configuration, delete, move or rename this file.
 
+                # Game settings
+                
                 # The duration of a molehunt game, in minutes.
                 # Default: 90 minutes (1 hour 30 minutes).
                 game_duration = 90
@@ -73,6 +86,9 @@ public class Config {
                 # Default: -1.
                 mole_count = -1
                 
+                
+                # Client-side settings (applies to all players)
+                
                 # Show nametags
                 # Default: false
                 show_nametags = false
@@ -84,6 +100,23 @@ public class Config {
                 # Show tab
                 # Default: false
                 show_tab = false
+                
+                
+                # World border settings :
+                
+                # Initial world size (in blocks).
+                # Default: 200 blocks.
+                initial_world_size = 200
+                
+                # Final world size (in blocks).
+                # Default: 50 blocks.
+                final_world_size = 50
+                
+                # Moving starting time offset (in minutes)
+                # The time before starting to move the world borders.
+                # If this value is greater than the game duration, borders will never move.
+                # Default: 10 minutes.
+                border_moving_starting_time_offset = 10
                 """;
     }
 }
diff --git a/src/main/java/world/anhgelus/molehunt/game/Game.java b/src/main/java/world/anhgelus/molehunt/game/Game.java
index a98516c..a2fdfbb 100644
--- a/src/main/java/world/anhgelus/molehunt/game/Game.java
+++ b/src/main/java/world/anhgelus/molehunt/game/Game.java
@@ -59,6 +59,21 @@ public class Game {
         gamerules.get(GameRules.DO_IMMEDIATE_RESPAWN).set(true, server);
         gamerules.get(GameRules.DO_ENTITY_DROPS).set(false, server);
 
+        final var worldBorder = server.getOverworld().getWorldBorder();
+        worldBorder.setSize(Molehunt.CONFIG.getInitialWorldSize());
+        if (Molehunt.CONFIG.getBorderShrinkingStartingTimeOffset() < Molehunt.CONFIG.getGameDuration()) {
+            timer.schedule(new TimerTask() {
+                @Override
+                public void run() {
+                    final var worldBorder = server.getOverworld().getWorldBorder();
+                    worldBorder.interpolateSize(
+                            Molehunt.CONFIG.getInitialWorldSize(),
+                            Molehunt.CONFIG.getFinalWorldSize(),
+                            (long) (Molehunt.CONFIG.getGameDuration() - Molehunt.CONFIG.getBorderShrinkingStartingTimeOffset()) * 60 * 1000);
+                }
+            }, (long) Molehunt.CONFIG.getBorderShrinkingStartingTimeOffset() * 60 * 1000);
+        }
+
         final var title = new TitleS2CPacket(Text.translatable("molehunt.game.start.suspense"));
         playerManager.getPlayerList().forEach(p -> {
             p.kill();
@@ -78,7 +93,8 @@ public class Game {
                         p.networkHandler.sendPacket(new TitleS2CPacket(Text.translatable("molehunt.game.start.mole.title")));
                         p.networkHandler.sendPacket(new SubtitleS2CPacket(Text.translatable("molehunt.game.start.mole.subtitle")));
                     } else {
-                        p.networkHandler.sendPacket(new TitleS2CPacket(Text.translatable("molehunt.game.start.survivor")));
+                        p.networkHandler.sendPacket(new TitleS2CPacket(Text.translatable("molehunt.game.start.survivor.title")));
+                        p.networkHandler.sendPacket(new SubtitleS2CPacket(Text.translatable("molehunt.game.start.survivor.subtitle")));
                     }
                     // reset health and food level
                     p.setHealth(p.getMaxHealth());
@@ -118,6 +134,11 @@ public class Game {
     public void end() {
         timer.cancel();
         timer = new Timer();
+
+        final var worldBorder = server.getOverworld().getWorldBorder();
+        // Stops the border shrinking.
+        worldBorder.setSize(worldBorder.getSize());
+
         changeState(false);
         final var pm = server.getPlayerManager();
         final var winnerSuspense = new TitleS2CPacket(Text.translatable("molehunt.game.end.suspense.title"));