feat(contacts): show total contact count in list header

lib/microwaveprop_web/live/contact_live/index.ex

@@ -3,6 +3,9 @@ defmodule MicrowavepropWeb.ContactLive.Index do
   use MicrowavepropWeb, :live_view
   use LiveTable.LiveResource, schema: Microwaveprop.Radio.Contact
 
+  alias Microwaveprop.Radio.Contact
+  alias Microwaveprop.Repo
+
   def table_options do
     %{
       sorting: %{default_sort: [inserted_at: :desc]},
@@ -45,7 +48,12 @@ defmodule MicrowavepropWeb.ContactLive.Index do
 
   @impl true
   def mount(_params, _session, socket) do
-    {:ok, assign(socket, :page_title, "Contacts")}
+    total = Repo.aggregate(Contact, :count, :id)
+
+    {:ok,
+     socket
+     |> assign(:page_title, "Contacts")
+     |> assign(:total_contacts, total)}
   end
 
   @enrichment_fields [
@@ -96,6 +104,14 @@ defmodule MicrowavepropWeb.ContactLive.Index do
 
   defp flag_cell(_), do: ""
 
+  defp format_count(n) when is_integer(n) do
+    n
+    |> Integer.to_string()
+    |> String.reverse()
+    |> String.replace(~r/(\d{3})(?=\d)/, "\\1,")
+    |> String.reverse()
+  end
+
   defp format_ts(nil), do: ""
   defp format_ts(%DateTime{} = dt), do: Calendar.strftime(dt, "%Y-%m-%d %H:%M")
   defp format_ts(%NaiveDateTime{} = dt), do: Calendar.strftime(dt, "%Y-%m-%d %H:%M")
@@ -107,7 +123,9 @@ defmodule MicrowavepropWeb.ContactLive.Index do
     <Layouts.app flash={@flash} current_scope={@current_scope} max_width="max-w-7xl">
       <.header>
         Contacts
-        <:subtitle>Sort or search by callsign, grid, or mode.</:subtitle>
+        <:subtitle>
+          {format_count(@total_contacts)} total — sort or search by callsign, grid, or mode.
+        </:subtitle>
         <:actions>
           <.link navigate={~p"/submit"} class="btn btn-primary">
             <.icon name="hero-plus" class="w-5 h-5" /> Submit Contact

test/microwaveprop_web/live/contact_live_test.exs

@@ -55,6 +55,15 @@ defmodule MicrowavepropWeb.ContactLiveTest do
       assert html =~ "Contacts"
     end
 
+    test "shows total contact count in subtitle", %{conn: conn} do
+      create_contact()
+      create_contact(%{station1: "N5AC"})
+      create_contact(%{station1: "K5TR"})
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts")
+      assert html =~ "3 total"
+    end
+
     test "table shows contact data", %{conn: conn} do
       create_contact()