[1.8.9] How can I move around a player's inventory client-side and send it to the server?

[TheKingElessar]

First off... I do have to use 1.8.9 because that's what the server is on. I'm using Forge 1.8.9-11.15.1.1722 with the classpaths from the 2.1 snapshot.

 

I'm trying to make a client-side inventory managing mod. I can move ItemStacks around fine in single-player, but I don't think that's gonna cut it for multiplayer. I've looked through the mod InventoryTweaks (1.8.9 version), but none of the packets reveal anything. I'd rather not look through the entire mod because it's pretty complex. I looked at the vanilla packets, but I can't find anything either.

 

Two vanilla packet types are sort of similar, C09PacketHeldItemChange and C10PacketCreativeInventoryAction, but neither handle moving items around in the inventory of a survival player. GuiInventory doesn't handle the moving of the items. GuiContainer seems to handle it, but only client-side, and doesn't send anything to the server.

 

It looks like the most likely option is using the InventoryPlayer class to change the player inventory, and the ContanerChest and similar container classes to change container inventories. The boolean inventoryChanged and method markDirty seem to be sort of what I'm looking for, but I can't find where they're used in the vanilla code—my IDE (Intellij) can't find them, but maybe I'm not searching it correctly.

[DaemonUmbra]

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