feat(command): /withdraw

2 files changed, 45 insertions, 0 deletions

diff --git a/src/main/java/world/anhgelus/lifesteal/Commands.java b/src/main/java/world/anhgelus/lifesteal/Commands.java
new file mode 100644
index 0000000..86aa901
--- /dev/null
+++ b/src/main/java/world/anhgelus/lifesteal/Commands.java
@@ -0,0 +1,36 @@
+package world.anhgelus.lifesteal;
+
+import com.mojang.brigadier.Command;
+import com.mojang.brigadier.CommandDispatcher;
+import com.mojang.brigadier.arguments.IntegerArgumentType;
+import net.minecraft.server.command.ServerCommandSource;
+import net.minecraft.text.Text;
+
+import static net.minecraft.server.command.CommandManager.argument;
+import static net.minecraft.server.command.CommandManager.literal;
+
+public class Commands {
+    public static void registerWithdraw(CommandDispatcher<ServerCommandSource> dispatcher) {
+        final var cmd = literal("withdraw").then(argument("hearts", IntegerArgumentType.integer(1))
+                .executes(context -> {
+                    final var source = context.getSource();
+                    final var hearts = IntegerArgumentType.getInteger(context, "hearts");
+                    final var p = source.getPlayerOrThrow();
+                    final var lifeStealer = LifeStealer.Manager.getLifeStealer(p);
+                    // if the amount will ban the LifeStealer, returns
+                    if (lifeStealer.getHealthModifier() - hearts * 2 <= LifeSteal.MIN_HEALTH - 20) {
+                        source.sendError(Text.of("You cannot give that amount."));
+                        return Command.SINGLE_SUCCESS;
+                    }
+                    for (int i = 0; i < hearts; i++) {
+                        lifeStealer.death();
+                        p.giveOrDropStack(lifeStealer.getHeart());
+                    }
+                    source.sendFeedback(() -> Text.of("Hearts given."), false);
+                    return Command.SINGLE_SUCCESS;
+                })
+        );
+
+        dispatcher.register(cmd);
+    }
+}
diff --git a/src/main/java/world/anhgelus/lifesteal/LifeSteal.java b/src/main/java/world/anhgelus/lifesteal/LifeSteal.java
index 83d442f..419480c 100644
--- a/src/main/java/world/anhgelus/lifesteal/LifeSteal.java
+++ b/src/main/java/world/anhgelus/lifesteal/LifeSteal.java
@@ -1,6 +1,8 @@
 package world.anhgelus.lifesteal;
 
+import com.mojang.brigadier.CommandDispatcher;
 import net.fabricmc.api.ModInitializer;
+import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
 import net.fabricmc.fabric.api.entity.event.v1.ServerLivingEntityEvents;
 import net.fabricmc.fabric.api.entity.event.v1.ServerPlayerEvents;
 import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
@@ -8,9 +10,12 @@ import net.fabricmc.fabric.api.gamerule.v1.GameRuleFactory;
 import net.fabricmc.fabric.api.gamerule.v1.GameRuleRegistry;
 import net.fabricmc.fabric.api.networking.v1.PacketSender;
 import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
+import net.minecraft.command.CommandRegistryAccess;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.damage.DamageSource;
 import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.command.CommandManager;
+import net.minecraft.server.command.ServerCommandSource;
 import net.minecraft.server.network.ServerPlayNetworkHandler;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.world.GameRules;
@@ -36,6 +41,10 @@ public class LifeSteal implements ModInitializer {
     public void onInitialize() {
         LOGGER.info("Initializing LifeSteal");
 
+        CommandRegistrationCallback.EVENT.register((CommandDispatcher<ServerCommandSource> dispatcher, CommandRegistryAccess registryAccess, CommandManager.RegistrationEnvironment environment) -> {
+            Commands.registerWithdraw(dispatcher);
+        });
+
         ServerLifecycleEvents.SERVER_STARTED.register(server -> {
             final var state = StateSaver.getServerState(server);
             LifeStealer.Manager.loadPlayers(state);