meta/lib/meta_web/controllers/user_keys_controller.ex

defmodule MetaWeb.UserKeysController do
  use MetaWeb, :controller

  alias Meta.Accounts

  def index(conn, %{"username" => username}) do
    case Accounts.get_user_by_username(username) do
      nil ->
        conn
        |> put_status(:not_found)
        |> text("")

      user ->
        keys = Accounts.get_keys_for(user)
               |> Enum.map(fn k -> k.value end)
               |> Enum.join("\n")

        body = "# Keys for #{user.username}\n" <> keys
        conn |> text(body)
    end
  end

  def new(conn, %{"key" => key} = params) do
    %{"value" => value, "comment" => comment} = key
    user = conn.assigns.current_user

    case Accounts.add_key(user, value, comment) do
      {:ok, _} ->
        conn
        |> put_flash(:info, "Key added successfully.")
        |> redirect(to: Routes.user_settings_path(conn, :edit))

      {:error, _} ->
        conn
        |> put_flash(:error, "Submitted key is invalid.")
        |> redirect(to: Routes.user_settings_path(conn, :edit))
    end
  end

  def delete(conn, %{"key_id" => id}) do
    user = conn.assigns.current_user
    key = Accounts.get_key!(id)

    if key.user_id == user.id do
      Accounts.remove_key!(key)

      conn
      |> put_flash(:info, "Key removed.")
      |> redirect(to: Routes.user_settings_path(conn, :edit))
    end

  end
end