Update individual clients in the live view

lib/chronoscope/application.ex

@@ -23,7 +23,7 @@ defmodule Chronoscope.Application do
       {Registry, [keys: :unique, name: Chronoscope.Gemini.Registry]},
       # Start to serve requests, typically the last entry
       ChronoscopeWeb.Endpoint,
-      Chronoscope.Monitor
+      Chronoscope.ViewActivator
     ]
 
     # See https://hexdocs.pm/elixir/Supervisor.html

lib/chronoscope/nts/client.ex

@@ -77,7 +77,7 @@ defmodule Chronoscope.NTS.Client do
     if interval_surpassed?(now, state.last_key_establishment) do
       state
       |> Map.merge(current_data(state, now))
-      |> tap(fn _ -> ChronoscopeWeb.Endpoint.broadcast(@topic, "", "") end)
+      |> tap(&ChronoscopeWeb.Endpoint.broadcast(@topic, "key-exchange", Map.delete(&1, :timer)))
     else
       state
     end

lib/chronoscope/view_activator.ex

@@ -1,4 +1,4 @@
-defmodule Chronoscope.Monitor do
+defmodule Chronoscope.ViewActivator do
   use GenServer
 
   require Logger

lib/chronoscope_web/live/index_live.ex

@@ -8,15 +8,20 @@ defmodule ChronoscopeWeb.IndexLive do
 
   def mount(_params, _session, socket) do
     ChronoscopeWeb.Endpoint.subscribe(@topic)
-    {:ok, assign(socket, %{servers: server_list()})}
+    {:ok, assign(socket, %{clients: client_list()})}
   end
 
-  def handle_info(%{topic: @topic}, socket) do
-    {:noreply, assign(socket, %{servers: server_list()})}
+  def handle_info(%{topic: @topic, event: "key-exchange", payload: client}, socket) do
+    {:noreply, update(socket, :clients, &update_client(&1, client))}
   end
 
-  defp server_list() do
-    Chronoscope.Monitor
+  defp update_client(client_list, client) do
+    # todo - use a map instead of list for fast lookups?
+    Enum.map(client_list, &if(client.server == &1.server, do: client, else: &1))
+  end
+
+  defp client_list() do
+    Chronoscope.ViewActivator
     |> GenServer.call(:get_nts_servers)
     |> NTS.list_clients()
   end

lib/chronoscope_web/live/index_live.html.heex

@@ -32,12 +32,12 @@
             </tr>
         </thead>
         <tbody>
-            <tr :for={server <- @servers} class="hover:bg-zinc-100 dark:hover:bg-zinc-700">
-                <% {status, response} = server.key_establishment_response %>
+            <tr :for={client <- @clients} class="hover:bg-zinc-100 dark:hover:bg-zinc-700">
+                <% {status, response} = client.key_establishment_response %>
 
                 <%= if (status == :ok) do %>
                 <td class="py-2 px-6 whitespace-nowrap">
-                    <%= server.server.host %><span :if={server.server.port != 4460}>:<%= server.server.port %></span>
+                    <%= client.server.host %><span :if={client.server.port != 4460}>:<%= client.server.port %></span>
                 </td>
                 <td class="py-2 px-6 whitespace-nowrap">
                     <%= status %>
@@ -68,12 +68,12 @@
                     <%= response.cert_expiration |> DateTime.from_iso8601 |> then(fn {:ok, dt, _} -> Calendar.strftime(dt, "%Y-%m-%d %H:%M:%SZ") end)%>
                 </td>
                 <td class="py-2 px-6 whitespace-nowrap">
-                    <%= server.last_key_establishment  |> Calendar.strftime("%Y-%m-%d %H:%M:%SZ") %>
+                    <%= client.last_key_establishment  |> Calendar.strftime("%Y-%m-%d %H:%M:%SZ") %>
                 </td>
 
                 <% else %>
                 <td class="py-2 px-6 whitespace-nowrap">
-                    <%= server.server.host %><span :if={server.server.port != 4460}>:<%= server.server.port %></span>
+                    <%= client.server.host %><span :if={client.server.port != 4460}>:<%= client.server.port %></span>
                 </td>
                 <td class="py-2 px-6 whitespace-nowrap">
                     <span class="group relative">
@@ -91,7 +91,7 @@
                 <td class="py-2 px-6 whitespace-nowrap"> - </td>
                 <td class="py-2 px-6 whitespace-nowrap">
                     <%=
-                    server.last_key_establishment |> Calendar.strftime("%Y-%m-%d %H:%M:%SZ")
+                    client.last_key_establishment |> Calendar.strftime("%Y-%m-%d %H:%M:%SZ")
                     %>
                 </td>
                 <% end %>