Check if player has an item equipped, then do an effect.

[PocketPossum]

Hi! I'm trying to make a custom item for a custom player character, and I'm trying to figure out how to trigger an effect only if the player has a specific item equipped in their head slot.

When the character gets hit, the enemy that hit them takes counter damage immediately.

But I want to check if the player has a specific item equipped to their headslot when this happens, and if it is equipped, perform a different effect.

The different effect being that it deals 99999999 damage to the attacker, and also the player character. So just the counter effect again, but much higher damage to kill both the player and attacker.

I've got the normal counter damage setup perfectly, but not the "if this item is equipped, deal this damage instead and also damage the wearer".

This is the counter effect that works perfectly for what I wanted.

    -- Counter effect.
    inst:ListenForEvent("attacked", function(inst, data)
  if data.attacker and data.attacker.components.health and data.attacker:HasTag("player") then
   data.attacker.components.health:DoDelta(math.random(-80, -80))
   end

  if data.attacker and data.attacker.components.health and not data.attacker:HasTag("player") then

   data.attacker.components.health:DoDelta(math.random(-200, -200))
   
   end
   
end) 

This is the attempted code for what I'm trying to do if the player has an item equipped.
 

    -- Destiny Bond.
    inst:ListenForEvent("attacked", function(inst, data)
    if data.eslot == EQUIPSLOTS.HEAD and data.item.destiny_bond then
  if data.attacker and data.attacker.components.health and data.attacker:HasTag("player") then
   data.attacker.components.health:DoDelta(math.random(-9999999999999, -9999999999999))
   data.inst.components.health:DoDelta(math.random(-9999999999999, -9999999999999))
   end

    if data.eslot == EQUIPSLOTS.HEAD and data.item.destiny_bond then
  if data.attacker and data.attacker.components.health and not data.attacker:HasTag("player") then

   data.attacker.components.health:DoDelta(math.random(-9999999999999, -9999999999999))
   data.inst.components.health:DoDelta(math.random(-9999999999999, -9999999999999))
   
   end
   
end end end)

Any help is appreciated, I've tried a bunch of ways of coding this and haven't figured it out yet.

[GameBoyAdv4002]

Checkout sword_lunarplant.lua, I think it might be what you're looking for.

if owner ~= nil then
			inst._onownerequip = function(owner, data)
				if data ~= nil then
					if data.item ~= nil and data.item.prefab == "lunarplanthat" then
						SetBuffEnabled(inst, true)
					elseif data.eslot == EQUIPSLOTS.HEAD then
						SetBuffEnabled(inst, false)
					end
				end
			end
			inst._onownerunequip  = function(owner, data)
				if data ~= nil and data.eslot == EQUIPSLOTS.HEAD then
					SetBuffEnabled(inst, false)
				end
			end
			inst:ListenForEvent("equip", inst._onownerequip, owner)
			inst:ListenForEvent("unequip", inst._onownerunequip, owner)

			local hat = owner.components.inventory:GetEquippedItem(EQUIPSLOTS.HEAD)
			if hat ~= nil and hat.prefab == "lunarplanthat" then
				SetBuffEnabled(inst, true)
			end
		end

 

[PocketPossum]

Thank you for pointing that out! I managed to take some bits from it and figure out how to do what I wanted.

    -- Destiny Bond.
    inst:ListenForEvent("attacked", function(inst, data)
  if data.attacker and data.attacker.components.health and data.attacker:HasTag("player") then
  			local hat = inst.components.inventory:GetEquippedItem(EQUIPSLOTS.HEAD)
			if hat ~= nil and hat.prefab == "destiny_bond" then
				data.attacker.components.health:DoDelta(math.random(-999999, -999999))
				inst.components.health:DoDelta(math.random(-999999, -999999))
   end
   end

  if data.attacker and data.attacker.components.health and not data.attacker:HasTag("player") then
  			local hat = inst.components.inventory:GetEquippedItem(EQUIPSLOTS.HEAD)
			if hat ~= nil and hat.prefab == "destiny_bond" then
				data.attacker.components.health:DoDelta(math.random(-999999, -999999))
				inst.components.health:DoDelta(math.random(-999999, -999999))
   end
   end
   
end) 

 

And it works! If the enemy attacks you while you're wearing the Destiny Bond item, instantly kills you and the attacker.

Thank you very much.