From 24840c48d4f383276b876d83a938140c25c9d602 Mon Sep 17 00:00:00 2001
From: Graham McIntire <graham@mcintire.me>
Date: Tue, 31 Mar 2026 09:12:32 -0500
Subject: [PATCH] Show 'Latest data: date time (Xm ago)' in map badge

---
 lib/microwaveprop_web/live/map_live.ex | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/microwaveprop_web/live/map_live.ex b/lib/microwaveprop_web/live/map_live.ex
index 41513d19..5143ffc1 100644
--- a/lib/microwaveprop_web/live/map_live.ex
+++ b/lib/microwaveprop_web/live/map_live.ex
@@ -66,6 +66,17 @@ defmodule MicrowavepropWeb.MapLive do
     {:noreply, socket}
   end
 
+  defp time_ago(dt) do
+    seconds = DateTime.diff(DateTime.utc_now(), dt)
+
+    cond do
+      seconds < 60 -> "just now"
+      seconds < 3600 -> "#{div(seconds, 60)}m ago"
+      seconds < 86_400 -> "#{div(seconds, 3600)}h ago"
+      true -> "#{div(seconds, 86_400)}d ago"
+    end
+  end
+
   defp selected_label(bands, selected_band) do
     case Enum.find(bands, &(&1.freq_mhz == selected_band)) do
       nil -> "Select Band"
@@ -118,7 +129,7 @@ defmodule MicrowavepropWeb.MapLive do
         </div>
 
         <div :if={@valid_time} class="badge badge-ghost bg-base-100/90 shadow text-xs">
-          {Calendar.strftime(@valid_time, "%H:%M UTC")}
+          Latest data: {Calendar.strftime(@valid_time, "%b %d, %H:%M UTC")} ({time_ago(@valid_time)})
         </div>
       </div>
     </div>