Show submitter callsign on the contacts index

When a contact is linked to a logged-in user account, display that
user's callsign in the Submitted column instead of a generic "Yes".
Anonymous submissions still show "Yes"; scraped contacts show an em
dash.

lib/microwaveprop/radio.ex

@@ -28,6 +28,7 @@ defmodule Microwaveprop.Radio do
       |> limit(^@per_page)
       |> offset(^offset)
       |> Repo.all()
+      |> Repo.preload(:user)
 
     %{
       entries: entries,

lib/microwaveprop/radio/contact.ex

@@ -4,6 +4,7 @@ defmodule Microwaveprop.Radio.Contact do
 
   import Ecto.Changeset
 
+  alias Microwaveprop.Accounts.User
   alias Microwaveprop.Radio.Maidenhead
 
   @primary_key {:id, :binary_id, autogenerate: true}
@@ -39,9 +40,10 @@ defmodule Microwaveprop.Radio.Contact do
 
     field :user_submitted, :boolean, default: false
     field :submitter_email, :string
-    field :user_id, :binary_id
     field :flagged_invalid, :boolean, default: false
 
+    belongs_to :user, User
+
     timestamps(type: :utc_datetime)
   end
 

lib/microwaveprop_web/live/contact_live/index.ex

@@ -80,6 +80,10 @@ defmodule MicrowavepropWeb.ContactLive.Index do
   ]
   @done_statuses [:complete, :unavailable]
 
+  defp submitted_cell(%{user: %{callsign: callsign}}) when is_binary(callsign), do: callsign
+  defp submitted_cell(%{user_submitted: true}), do: "Yes"
+  defp submitted_cell(_), do: "—"
+
   defp enrichment_badge(contact) do
     details =
       Enum.map(@enrichment_fields, fn {field, name} ->
@@ -183,7 +187,7 @@ defmodule MicrowavepropWeb.ContactLive.Index do
               <td>{primary.band}</td>
               <td>{primary.mode}</td>
               <td>{primary.distance_km}</td>
-              <td>{if primary.user_submitted, do: "Yes", else: "—"}</td>
+              <td>{submitted_cell(primary)}</td>
               <td>{enrichment_badge(primary)}</td>
               <td class="text-center">{if primary.flagged_invalid, do: "🚩"}</td>
               <td>{Calendar.strftime(primary.qso_timestamp, "%Y-%m-%d %H:%M")}</td>
@@ -202,7 +206,7 @@ defmodule MicrowavepropWeb.ContactLive.Index do
                 <td>{recip.band}</td>
                 <td>{recip.mode}</td>
                 <td>{recip.distance_km}</td>
-                <td>{if recip.user_submitted, do: "Yes", else: "—"}</td>
+                <td>{submitted_cell(recip)}</td>
                 <td>{enrichment_badge(recip)}</td>
                 <td class="text-center">{if recip.flagged_invalid, do: "🚩"}</td>
                 <td>{Calendar.strftime(recip.qso_timestamp, "%Y-%m-%d %H:%M")}</td>

test/microwaveprop_web/live/contact_live_test.exs

@@ -1,6 +1,7 @@
 defmodule MicrowavepropWeb.ContactLiveTest do
   use MicrowavepropWeb.ConnCase, async: true
 
+  import Microwaveprop.AccountsFixtures
   import Phoenix.LiveViewTest
 
   alias Microwaveprop.Radio.Contact
@@ -36,9 +37,12 @@ defmodule MicrowavepropWeb.ContactLiveTest do
       distance_km: Decimal.new("295")
     }
 
+    {changeset_attrs, direct_attrs} = Map.split(Map.merge(default, attrs), [:user_submitted])
+
     {:ok, contact} =
       %Contact{}
-      |> Contact.changeset(Map.merge(default, attrs))
+      |> Contact.changeset(direct_attrs)
+      |> Ecto.Changeset.change(changeset_attrs)
       |> Repo.insert()
 
     contact
@@ -112,6 +116,31 @@ defmodule MicrowavepropWeb.ContactLiveTest do
       {:ok, _lv, html2} = live(conn, ~p"/contacts?page=2")
       assert html2 =~ "Page 2 of 2"
     end
+
+    test "Submitted column shows the user's callsign when linked to an account", %{conn: conn} do
+      user = user_fixture(%{callsign: "W5UNIQ"})
+      create_contact(%{station1: "K5ONE", user_submitted: true, user_id: user.id})
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts?search=K5ONE")
+      assert html =~ "W5UNIQ"
+    end
+
+    test "Submitted column shows 'Yes' when user_submitted but no user linked", %{conn: conn} do
+      create_contact(%{station1: "K5ANON", user_submitted: true, user_id: nil})
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts?search=K5ANON")
+      # Locate the row containing our station and assert "Yes" appears in it
+      [row] = Regex.run(~r/<tr[^>]*>(?:(?!<\/tr>).)*K5ANON(?:(?!<\/tr>).)*<\/tr>/s, html) || [""]
+      assert row =~ ">Yes<"
+    end
+
+    test "Submitted column shows dash for scraped contacts", %{conn: conn} do
+      create_contact(%{station1: "K5SCRAPE", user_submitted: false})
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts?search=K5SCRAPE")
+      [row] = Regex.run(~r/<tr[^>]*>(?:(?!<\/tr>).)*K5SCRAPE(?:(?!<\/tr>).)*<\/tr>/s, html) || [""]
+      refute row =~ ">Yes<"
+    end
   end
 
   describe "Show" do