add contexts

lib/memex_web/live/context_live/show.ex

@@ -0,0 +1,21 @@
+defmodule MemexWeb.ContextLive.Show do
+  use MemexWeb, :live_view
+
+  alias Memex.Contexts
+
+  @impl true
+  def mount(_params, _session, socket) do
+    {:ok, socket}
+  end
+
+  @impl true
+  def handle_params(%{"id" => id}, _, socket) do
+    {:noreply,
+     socket
+     |> assign(:page_title, page_title(socket.assigns.live_action))
+     |> assign(:context, Contexts.get_context!(id))}
+  end
+
+  defp page_title(:show), do: "Show Context"
+  defp page_title(:edit), do: "Edit Context"
+end