Fix vanilla server kick + button logic

src/main/java/turniplabs/halplibe/HalpLibe.java

@@ -9,7 +9,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import turniplabs.halplibe.helper.*;
-import turniplabs.halplibe.helper.gui.Guis;
+import turniplabs.halplibe.helper.gui.packet.PacketGuiButtonClick;
 import turniplabs.halplibe.helper.gui.packet.PacketOpenBlockGui;
 import turniplabs.halplibe.helper.gui.packet.PacketOpenGui;
 import turniplabs.halplibe.helper.gui.packet.PacketOpenItemGui;
@@ -88,11 +88,7 @@ public void onInitialize() {
         NetworkHelper.register(PacketOpenGui.class, false, true);
         NetworkHelper.register(PacketOpenItemGui.class, false, true);
         NetworkHelper.register(PacketOpenBlockGui.class, false, true);
-        try {
-            Class.forName(Guis.class.getName()); // init vanilla guis
-        } catch (ClassNotFoundException e) {
-            throw new RuntimeException(e);
-        }
+        NetworkHelper.register(PacketGuiButtonClick.class, true, true);
 
         LOGGER.info("HalpLibe initialized.");
     }

src/main/java/turniplabs/halplibe/helper/gui/GuiHelper.java

@@ -3,6 +3,7 @@
 import net.minecraft.core.data.registry.Registry;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import turniplabs.halplibe.HalpLibe;
 import turniplabs.halplibe.helper.gui.factory.IGuiFactory;
 import turniplabs.halplibe.helper.gui.registered.RegisteredGui;
@@ -29,7 +30,8 @@ public static RegisteredGui getGui(@NotNull String modId, @NotNull String guiId)
         return REGISTRY.getItem(modId + ":" + guiId);
     }
 
-    public static RegisteredGui getGui(@NotNull String namespace) {
+    public static RegisteredGui getGui(@Nullable String namespace) {
+        if(namespace == null) return null;
         return REGISTRY.getItem(namespace);
     }
 

src/main/java/turniplabs/halplibe/helper/gui/GuiScreenAccessor.java

@@ -0,0 +1,19 @@
+package turniplabs.halplibe.helper.gui;
+
+import turniplabs.halplibe.helper.gui.registered.RegisteredGui;
+
+public interface GuiScreenAccessor {
+
+    void setGuiNamespace(String namespace);
+
+    String getGuiNamespace();
+
+    default void setRegisteredGui(RegisteredGui gui) {
+        setGuiNamespace(gui.getNamespace());
+    }
+
+    default RegisteredGui getRegisteredGui() {
+        return GuiHelper.getGui(getGuiNamespace());
+    }
+
+}

src/main/java/turniplabs/halplibe/helper/gui/factory/IGuiFactory.java

@@ -2,9 +2,11 @@
 
 import net.minecraft.client.entity.player.EntityPlayerSP;
 import net.minecraft.client.gui.GuiScreen;
+import net.minecraft.core.entity.player.EntityPlayer;
 import net.minecraft.core.item.ItemStack;
 import net.minecraft.core.player.inventory.Container;
 import net.minecraft.server.entity.player.EntityPlayerMP;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import turniplabs.halplibe.helper.gui.packet.PacketOpenBlockGui;
@@ -14,10 +16,52 @@
 
 public interface IGuiFactory {
 
+    /**
+     * Called to create a gui screen on a client.
+     *
+     * @param gui the registered gui that needs to create a gui
+     * @param player the player that will see the gui
+     * @param itemStack an item, in case the gui is an item gui
+     * @param x x coordinate, in case the gui is a block gui
+     * @param y y coordinate, in case the gui is a block gui
+     * @param z z coordinate, in case the gui is a block gui
+     * @return a new gui
+     */
+    @ApiStatus.Internal
     @NotNull GuiScreen createGui(@NotNull RegisteredGui gui, @NotNull EntityPlayerSP player, @Nullable ItemStack itemStack, int x, int y, int z);
 
+    /**
+     * Called to create a gui container on a server.
+     *
+     * @param gui the registered gui that needs to create a container
+     * @param player the player that will open the container
+     * @param itemStack an item, in case the gui is an item gui
+     * @param x x coordinate, in case the gui is a block gui
+     * @param y y coordinate, in case the gui is a block gui
+     * @param z z coordinate, in case the gui is a block gui
+     * @return a new container
+     */
+    @ApiStatus.Internal
     @Nullable Container createContainer(@NotNull RegisteredGui gui, @NotNull EntityPlayerMP player, @Nullable ItemStack itemStack, int x, int y, int z);
 
+    /**
+     * Called when a gui interaction happens.<p>
+     * The player and clicker parameter are not the same when a client acknowledges
+     * that another player has pressed a button.<p>
+     * As an example, if player1 clicked a button on a server,
+     * this method will be called on player2's client
+     * with player2 as the player argument and player1 as the clicker argument
+     *
+     * @param gui the registered gui that was clicked
+     * @param player the player that acknowledges that a player has pressed a button
+     * @param clicker the player that clicked the button
+     * @param buttonId the id of the button
+     */
+    default void onButtonClick(@NotNull RegisteredGui gui, @NotNull EntityPlayer player, @NotNull EntityPlayer clicker, int buttonId) {
+
+    }
+
+    @ApiStatus.Internal
     default @NotNull GuiScreen createGui(@NotNull RegisteredGui gui, @NotNull EntityPlayerSP player, @NotNull PacketOpenGui packet) {
         if(!gui.isServerSide()) throw new IllegalStateException("Gui is client side!");
 
@@ -33,6 +77,7 @@ public interface IGuiFactory {
         return createGui(gui, player, null, 0, -100, 0);
     }
 
+    @ApiStatus.Internal
     default @NotNull PacketOpenGui createGuiPacket(@NotNull RegisteredGui gui, int windowId, @NotNull EntityPlayerMP player, @Nullable ItemStack itemStack, int x, int y, int z) {
         if(!gui.isServerSide()) throw new IllegalStateException("Gui is client side!");
 
@@ -47,6 +92,7 @@ public interface IGuiFactory {
         return new PacketOpenGui(gui, windowId);
     }
 
+    @ApiStatus.Internal
     default void throwInvalidException(String message) {
         throw new IllegalArgumentException(String.format("Invalid arguments for gui factory '%s': %s", getClass(), message));
     }

src/main/java/turniplabs/halplibe/helper/gui/factory/block/BlockGuiFactory.java

@@ -25,6 +25,7 @@ default GuiScreen createGui(@NotNull RegisteredGui gui, @NotNull EntityPlayerSP
 
     @Override
     default @Nullable Container createContainer(@NotNull RegisteredGui gui, @NotNull EntityPlayerMP player, @Nullable ItemStack itemStack, int x, int y, int z) {
+        if(y < 0) throwInvalidException("y value of block coordinates must be set to a positive value. This either means a wrong value has been used as an argument or that the wrong gui method has been called.");
         return createContainer(gui, player, x, y, z);
     }
 }