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triplex

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Build multitenant applications on top of Ecto.

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triplex lib triplex subdomain_plug.ex
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lib/triplex/subdomain_plug.ex 

defmodule Triplex.SubdomainPlug do

  @moduledoc """

  This is a basic plug that loads the current tenant assign from a given

  value set on subdomain.



  To plug it on your router, you can use:



      plug Triplex.SubdomainPlug,

        endpoint: MyApp.Endpoint,

        tenant_handler: &TenantHelper.tenant_handler/1



  See `Triplex.PlugConfig` to check all the allowed configuration flags.

  """



  import Triplex.Plug

  alias Plug.Conn

  alias Triplex.PlugConfig



  @doc false

  def init(opts), do: PlugConfig.new(opts)



  @doc false

  def call(conn, config),

    do: put_tenant(conn, get_subdomain(conn, config), config)



  defp get_subdomain(_conn, %PlugConfig{endpoint: nil}) do

    nil

  end

  defp get_subdomain(%Conn{host: host}, %PlugConfig{endpoint: endpoint}) do

    root_host = endpoint.config(:url)[:host]

    if host in [root_host, "localhost", "127.0.0.1", "0.0.0.0"] do

      nil

    else

      String.replace(host, ~r/.?#{root_host}/, "")

    end

  end

end