chat history

local index = 0
local history = {}

hook.Add("OnPlayerChat", "chat_history", function(ply, text)
    if ply == LocalPlayer() then
        table.insert(history, text)
        index = math.huge
    end
end)

hook.Add("OnChatTab", "chat_history", function()
    if input.IsKeyDown(KEY_UP) then
        index = math.Clamp(index - 1, 0, #history)
        return history[index]
    elseif input.IsKeyDown(KEY_DOWN) then
        index = math.Clamp(index + 1, 0, #history)
        return history[index]
    end
end)

--[[
hold up or down and press tab to browse your chat history. I know it's ass needing to press tab to do this, but it's the only way pretty much without using a module
]]