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mods/hearth/interactions.lua

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+-- Player interactions; survival state remains owned by the caller.
+return function(hearth)
+	local function eat(amounts, replacement)
+		return function(stack, player)
+			if not player or not player:is_player() then return stack end
+			local state = hearth.players[player:get_player_name()]
+			if not state then return stack end
+			local needed = false
+			for key, value in pairs(amounts) do
+				if type(state[key]) == "number" and state[key] < 100 and value > 0 then
+					needed = true
+				end
+			end
+			if not needed then return stack end
+			for key, value in pairs(amounts) do
+				if type(state[key]) == "number" then
+					state[key] = math.max(0, math.min(100, state[key] + value))
+				end
+			end
+			if replacement then stack:replace(replacement) else stack:take_item() end
+			return stack
+		end
+	end
+
+	return {eat = eat}
+end