Add sign spammer (#509)

* add sign spammer

* remove unused imports

* sort mixins and use javadoc comment

* move javadoc above annotation

src/main/java/me/zeroeightsix/kami/mixin/client/MixinClientPlayNetworkHandler.java

@@ -0,0 +1,48 @@
+package me.zeroeightsix.kami.mixin.client;
+
+import me.zeroeightsix.kami.feature.module.SignSpammer;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.client.network.ClientPlayNetworkHandler;
+import net.minecraft.network.Packet;
+import net.minecraft.network.packet.c2s.play.UpdateSignC2SPacket;
+import net.minecraft.network.packet.s2c.play.SignEditorOpenS2CPacket;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
+
+@Mixin(ClientPlayNetworkHandler.class)
+public abstract class MixinClientPlayNetworkHandler {
+    @Shadow
+    public abstract void sendPacket(Packet<?> packet);
+
+    @Inject(
+            method = "onSignEditorOpen",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/client/network/ClientPlayerEntity;openEditSignScreen(Lnet/minecraft/block/entity/SignBlockEntity;)V"
+            ),
+            cancellable = true,
+            locals = LocalCapture.CAPTURE_FAILSOFT
+    )
+    private void onSignEditorOpen(SignEditorOpenS2CPacket packet, CallbackInfo ci, BlockEntity blockEntity) {
+        // this variable is just here for some deduplication
+        SignSpammer spammer = SignSpammer.INSTANCE;
+        if (spammer.getEnabled()) {
+            this.sendPacket(
+                    new UpdateSignC2SPacket(
+                            packet.getPos(),
+                            spammer.getLine1(),
+                            spammer.getLine2(),
+                            spammer.getLine3(),
+                            spammer.getLine4()
+                    )
+            );
+            blockEntity.markDirty();
+            // cancel to not open edit screen
+            ci.cancel();
+        }
+    }
+}

src/main/kotlin/me/zeroeightsix/kami/feature/module/SignSpammer.kt

@@ -0,0 +1,22 @@
+package me.zeroeightsix.kami.feature.module
+
+import io.github.fablabsmc.fablabs.api.fiber.v1.annotation.Setting
+
+/**
+ * @see me.zeroeightsix.kami.mixin.client.MixinClientPlayNetworkHandler
+ */
+@Module.Info(
+    name = "SignSpammer",
+    category = Module.Category.MISC,
+    description = "Automatically fills newly placed signs"
+)
+object SignSpammer : Module() {
+    @Setting
+    var line1 = ""
+    @Setting
+    var line2 = ""
+    @Setting
+    var line3 = ""
+    @Setting
+    var line4 = ""
+}

src/main/resources/kami.mixins.json

@@ -39,6 +39,7 @@
     "MixinClientConnection",
     "MixinClientPlayerEntity",
     "MixinClientPlayerInteractionManager",
+    "MixinClientPlayNetworkHandler",
     "MixinClientWorld",
     "MixinComeCommand",
     "MixinCommandSuggestor",