poussinsuamd

Not sure how to use packets. May I ask you to teach me please?

Hi, I am making a mod which requires players to put in an item in a GUI. The GUI then checks the item name and the player's name to do stuff (this stuff is working). However, I have no way of communicating the player's name from the server to the client, although I have the item's name on the client side. Plus, there is a timer on the GUI and, when the item is deposited, counts down from 10 to 0 (when it reaches 0, the item disappears). However, if I put in an item in this table and the countdown begins, another player can access the table at the same time and he will see the item I have put in as well as the countdown (although the countdown will start at 10 no matter what and the item will disappear when my countdown reaches 0). I don't know what to do. Please help! TileEntity class: public class TileEntityObjectiveTable extends TileEntity implements ICapabilityProvider, ITickable { protected ItemStackHandler handler= new ItemStackHandler(1); private String customName; private int time = 0; private int totalTime=200; private String name = "test"; public ItemStack[] valid_items = { new ItemStack(ModItems.ALLOY), new ItemStack(ModItems.MOLTEN_COPPER), new ItemStack(ModItems.MOLTEN_DIAMOND), new ItemStack(ModItems.MOLTEN_EMERALD), new ItemStack(ModItems.MOLTEN_GOLD), new ItemStack(ModItems.MOLTEN_IRON), new ItemStack(ModItems.MOLTEN_PLATINUM), new ItemStack(ModItems.MOLTEN_SODIUM), new ItemStack(ModItems.OBJECTIVE_SKIP), new ItemStack(ModItems.SALT), new ItemStack(ModItems.SALTY_WATER), new ItemStack(ModItems.STRONG_ACID), new ItemStack(ModItems.STRONG_BASE), new ItemStack(ModItems.WEAK_ACID), new ItemStack(ModItems.WEAK_BASE) }; public boolean isItemValid(ItemStack stack) { for (ItemStack valid : this.valid_items) { if (valid.isItemEqualIgnoreDurability(stack)) { return true; } } return false; } @Override public boolean hasCapability(Capability<?> capability, EnumFacing facing) { if (capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY) return true; return super.hasCapability(capability, facing); } @Override public <T> T getCapability(Capability<T> capability, EnumFacing facing) { if (capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY) return (T) this.handler; return super.getCapability(capability, facing); } @Override public NBTTagCompound writeToNBT(NBTTagCompound compound) { super.writeToNBT(compound); if(this.hasCustomName()) compound.setString("CustomName", this.customName); return compound; } @Override public void readFromNBT(NBTTagCompound compound) { super.readFromNBT(compound); this.handler.deserializeNBT(compound.getCompoundTag("Inventory")); this.time=compound.getInteger("time"); this.name=compound.getString("Name"); if(compound.hasKey("CustomName", 8)) this.setCustomName(compound.getString("CustomName")); } @Override public SPacketUpdateTileEntity getUpdatePacket(){ NBTTagCompound compound = new NBTTagCompound(); compound.setTag("Inventory", this.handler.serializeNBT()); compound.setInteger("Time", (short)this.time); compound.setString("Name", this.name); return new SPacketUpdateTileEntity(getPos(), 1, compound); } @Override public void onDataPacket(NetworkManager net, SPacketUpdateTileEntity pkt){ NBTTagCompound compound = pkt.getNbtCompound(); this.handler.deserializeNBT(compound.getCompoundTag("Inventory")); this.time=compound.getInteger("time"); this.name=compound.getString("Name"); } public boolean shouldRefresh(World world, BlockPos pos, IBlockState oldState, IBlockState newSate) { return (oldState.getBlock() != newSate.getBlock()); } public boolean isRunning(){ return this.handler.getStackInSlot(0) != ItemStack.EMPTY; } private IBlockState getState() { return world.getBlockState(pos); } @Override public ITextComponent getDisplayName() { return this.hasCustomName() ? new TextComponentString(this.customName) : new TextComponentTranslation("Objective Table"); } public boolean hasCustomName() { return this.customName != null && !this.customName.isEmpty(); } public void setCustomName(String customName) { this.customName = customName; } public boolean isUsableByPlayer(EntityPlayer playerIn) { return this.world.getTileEntity(this.pos) != this ? false : playerIn.getDistanceSq((double)this.pos.getX() + 0.5D, (double)this.pos.getY() + 0.5D, (double)this.pos.getZ() + 0.5D) <= 64.0D; } @Override public void update() { if(isItemValid(this.handler.getStackInSlot(0))) { System.out.println(this.handler.getStackInSlot(0).toString()); time++; if(time == totalTime) { check(name, handler.getStackInSlot(0).toString()); System.out.println(handler.getStackInSlot(0).toString()); System.out.println(name.toString()); handler.setStackInSlot(0, ItemStack.EMPTY); time=0; } } else { time=0; } } public void check(String name, String item) { if(!world.isRemote) { Gamemode.checkObjective(name, item); } } public int getField(int i) { switch (i) { case 1: return this.time; default : return 0; } } public void setField(int i, int j) { switch (i) { case 1: this.time=j; break; default : return ; } } public void setName(String name) { this.name = name; } public String getName() { return name; } } GUI class: public class GuiObjectiveTable extends GuiContainer{ private static final ResourceLocation TEXTURES = new ResourceLocation (Reference.MOD_ID + ":textures/gui/objective_table.png"); private final EntityPlayer player; private final TileEntityObjectiveTable tileentity; private int time = 0; private int totalTime = 200; private String name; private GuiButton button; public GuiObjectiveTable(EntityPlayer player, TileEntityObjectiveTable tileentity) { super (new ContainerObjectiveTable(player, tileentity)); this.player = player; this.tileentity = tileentity; tileentity.setName(player.getName()); } @Override public void initGui() { super.initGui(); } @Override protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) { String tileName = this.tileentity.getDisplayName().getUnformattedText(); this.fontRenderer.drawString(tileName, (this.xSize / 2 - this.fontRenderer.getStringWidth(tileName) / 2 ) + 3, 8, 4210752); } @Override protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) { GlStateManager.color(1.0F, 1.0F, 1.0F); this.mc.getTextureManager().bindTexture(TEXTURES); this.drawTexturedModalRect(this.guiLeft, this.guiTop, 0, 0, this.xSize, this.ySize); if (this.tileentity.getField(1)!=0) { int k = this.getTime(); if(k<=5) { tileentity.setName(this.player.getDisplayNameString()); } this.fontRenderer.drawString(this.tileentity.getName(), this.getGuiLeft() + 122, this.getGuiTop() +71 + 2, 4210752); String v = "" + (10-k/20); this.buttonList.clear(); buttonList.add(button = new GuiButton(0, this.guiLeft + 8, this.guiTop + 30 + 5,45, 20, v)); } else { this.buttonList.clear(); String v = "" + 0; buttonList.add(button = new GuiButton(0, this.guiLeft + 8, this.guiTop + 30 + 5,45, 20, v)); } } private int getTime() { return this.tileentity.getField(1); } public boolean isItemValid(ItemStack stack) { for (ItemStack valid : this.valid_items) { if (valid.isItemEqualIgnoreDurability(stack)) { return true; } } return false; } public ItemStack[] valid_items = { new ItemStack(ModItems.CALCIUM), new ItemStack(ModItems.COPPER), new ItemStack(ModItems.PLATINUM), new ItemStack(ModItems.SODIUM), new ItemStack(ModItems.MOLTEN_CALCIUM), new ItemStack(ModItems.CHLORINE), new ItemStack(ModItems.OBJECTIVE_SKIP) }; } Thank you!