From 34c78fbe870195a35cfbb0adfd3ed565ad9a498a Mon Sep 17 00:00:00 2001
From: Graham McIntire <graham@mcintire.me>
Date: Sat, 25 Oct 2025 18:17:03 -0500
Subject: [PATCH] Handle both atom and string keys for packet received_at field

When packets go through Phoenix LiveView serialization, map keys can be
converted from atoms to strings. Add get_received_at/1 helper that handles
both formats to prevent KeyError when accessing received_at field.

This fixes the crash when the iOS app searches for callsigns and the
LiveView tries to render the tracked callsign's last seen time.
---
 lib/aprsme_web/live/map_live/components.ex | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/aprsme_web/live/map_live/components.ex b/lib/aprsme_web/live/map_live/components.ex
index 72ad543..8b39fd5 100644
--- a/lib/aprsme_web/live/map_live/components.ex
+++ b/lib/aprsme_web/live/map_live/components.ex
@@ -196,7 +196,7 @@ defmodule AprsmeWeb.MapLive.Components do
       </form>
       <%= if @tracked_callsign_latest_packet do %>
         <div class="mt-2 text-xs text-gray-600">
-          Last seen: {time_ago_in_words(@tracked_callsign_latest_packet.received_at)}
+          Last seen: {time_ago_in_words(get_received_at(@tracked_callsign_latest_packet))}
         </div>
       <% end %>
     </div>
@@ -354,4 +354,11 @@ defmodule AprsmeWeb.MapLive.Components do
     </style>
     """
   end
+
+  # Helper function to get received_at from packet with either atom or string keys
+  defp get_received_at(packet) when is_map(packet) do
+    packet[:received_at] || packet["received_at"]
+  end
+
+  defp get_received_at(_), do: nil
 end