63 lines
1.3 KiB
Elixir
63 lines
1.3 KiB
Elixir
defmodule Proxichat.ChannelAuthenticator do
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@moduledoc """
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This module stores the list of current users in an ETS database and can be used to check if given user IDs are valid.
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"""
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use GenServer
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@user_table :proxichat_users
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def start_link(opts \\ []) do
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GenServer.start_link(__MODULE__, :ok, opts)
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end
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def init(:ok) do
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init_db
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{:ok, nil}
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end
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def init_db() do
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if :ets.info(@user_table) == :undefined do
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:ets.new @user_table, [:named_table, :set, :public, read_concurrency: true]
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end
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end
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def check_user(user_id) do
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case get_user user_id do
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nil -> create_user
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user -> user
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end
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end
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def get_user(user_id) do
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case :ets.lookup @user_table, user_id do
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[{_, user}] -> user.id
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_ -> nil
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end
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end
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def create_user() do
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id = get_new_user_id
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user = %{id: id}
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update_user user
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id
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end
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def user_set_network(user_id, network_id) do
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get_user user_id
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|> Map.put(:network, network_id)
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|> update_user
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end
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def user_check_network(user_id, network_id) do
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user = get_user user_id
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Map.get(user, :network, nil) == network_id
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end
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def update_user(user) do
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:ets.insert @user_table, {user.id, user}
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end
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defp get_new_user_id() do
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UUID.uuid4
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end
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end
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