Read items in chest when opened on client side

[Codemetry]

How do I read the items in an opened chest (chest gui opened), on client side?

[Codemetry]

  On 11/18/2019 at 12:00 PM, diesieben07 said:

EntityPlayer#openContainer to get the currently open Container. Then Container#inventorySlots to get all Slots. Then Slot#getStack to get the ItemStack in that slot.

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It doesn't work. It seems to always access the player inventory.

Edited November 19, 2019 by Codemetry

[Codemetry]

  On 11/18/2019 at 12:00 PM, diesieben07 said:

EntityPlayer#openContainer to get the currently open Container. Then Container#inventorySlots to get all Slots. Then Slot#getStack to get the ItemStack in that slot.

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Firstly, EntityPlayer#openContainer is assigned the container of the opened chest AFTER the initialization (GuiScreen#initGui) of the opened GuiChest (the container is stored in GuiContainer). So, I changed to try to access the chest contents in InitGuiEvent.Post event handler.

 

Secondly, I found that the container stored in GuiContainer is a ContainerChest containing the player inventory AND the chest inventory. Therefore, it is not accurate to access the container and directly get the item stacks via it. Then, I found that ContainerChest#getLowerChestInventory returns the chest inventory (somehow it is called lower inventory).

 

Finally, I checked the runtime type of the inventory returned by ContainerChest#getLowerChestInventory. It turns out to be ContainerLocalMenu. The only place which constructs new ContainerLocalMenus is NetHandlerPlayClient#handleOpenWindow. However, the method accepts a packet that does not store the chest inventory contents.

 

Where did I go wrong? How do I access the chest contents?

Edited November 19, 2019 by Codemetry

[Codemetry]

  On 11/19/2019 at 9:23 AM, diesieben07 said:

Inventory contents are sent later in a separate packet.

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Do you know the packet type name?

 

Which event should I handle and access the chest contents inside the event handler?

Edited November 19, 2019 by Codemetry

[Codemetry]

  On 11/19/2019 at 12:17 PM, diesieben07 said:

Doesn't matter.

 

There is no event. The chest contents could change at any point. Please explain what exactly you are trying to achieve.

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Read the contents of a chest upon opening, and detect its changes.

I wanted the packet name to check the source code and see if there is any way I can detect.

Edited November 19, 2019 by Codemetry

[Codemetry]

  On 11/19/2019 at 12:28 PM, diesieben07 said:

There is no better way than to check every tick.

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How do I check if the chest contents are loaded?

[Codemetry]

  On 11/19/2019 at 5:17 PM, diesieben07 said:

You can't. There is no way to tell client-side whether you are looking at an empty inventory or the contents have not arrived yet.

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Thanks for helping me.