User send packet hook demo

defmodule ModPresenceRequest do

    use Ejabberd.Module

    @behaviour :gen_mod

    require EjabberdModule.Utility

    alias Helper.StringUtils

    def start(host, _opts) do
        info('Starting ejabberd module MyCircle Presence Request')
        Ejabberd.Hooks.add(:user_send_packet, :host, __MODULE__, :on_user_send_packet, 50)
        :ok
    end

    def stop(host) do
        info('Stopping ejabberd module MyCircle Presence Request')
        Ejabberd.Hooks.delete(:user_send_packet, :host, __MODULE__, :on_user_send_packet, 50)
        :ok
    end

    def on_user_send_packet({packet, c2s_state}) do
        info("User Send Packet Filter")
        {packet, c2s_state} |> IO.inspect()
    end

    def depends(_host, _opts) do
        []
    end

    def mod_options(_host) do
        []
    end
end