36 lines
945 B
Elixir
36 lines
945 B
Elixir
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defmodule Shift73kWeb.EnsureAllowRegistrationPlug do
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@moduledoc """
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This plug ensures that there is at least one known User.
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"""
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import Plug.Conn
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import Phoenix.Controller
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alias Shift73k.Repo
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alias Shift73k.Accounts.User
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@app_vars Application.compile_env(:shift73k, :app_global_vars, allow_registration: :true)
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@app_allow_registration @app_vars[:allow_registration]
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@doc false
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@spec init(any()) :: any()
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def init(config), do: config
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@doc false
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@spec call(Conn.t(), atom() | [atom()]) :: Conn.t()
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def call(conn, _opts) do
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# If there aren't even any users, or registration is allowed
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if !Repo.exists?(User) || @app_allow_registration do
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# We will allow registration
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conn
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else
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# Otherwise,
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# if app is configured to not allow registration,
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# and there is a user,
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# then we redirect to root URL
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conn
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|> redirect(to: "/")
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|> halt()
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end
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end
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end
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