Add /api/collection/on_this_day endpoint

lib/music_library_web/controllers/collection_controller.ex

@@ -15,6 +15,18 @@ defmodule MusicLibraryWeb.CollectionController do
     render(conn, :show, record: random_record)
   end
 
+  def on_this_day(conn, params) do
+    current_date =
+      case Map.get(params, "date") do
+        nil -> Date.utc_today()
+        date_string -> Date.from_iso8601!(date_string)
+      end
+
+    records_on_this_day = Collection.get_records_on_this_day(current_date)
+
+    render(conn, :on_this_day, records: records_on_this_day)
+  end
+
   def index(conn, params) do
     limit =
       params

lib/music_library_web/controllers/collection_json.ex

@@ -16,6 +16,12 @@ defmodule MusicLibraryWeb.CollectionJSON do
     }
   end
 
+  def on_this_day(%{records: records}) do
+    %{
+      records: Enum.map(records, &record/1)
+    }
+  end
+
   defp record(record) do
     %{
       id: record.id,

lib/music_library_web/router.ex

@@ -84,6 +84,7 @@ defmodule MusicLibraryWeb.Router do
 
     get "/collection/latest", CollectionController, :latest
     get "/collection/random", CollectionController, :random
+    get "/collection/on_this_day", CollectionController, :on_this_day
     get "/collection", CollectionController, :index
     get "/assets/:transform_payload", AssetController, :show
     get "/backup", ArchiveController, :backup

test/music_library_web/controllers/collection_controller_test.exs

@@ -4,7 +4,7 @@ defmodule MusicLibraryWeb.CollectionControllerTest do
   import MusicLibrary.Fixtures.Records
 
   defp create_record(_) do
-    %{record: record_with_artist("Steven Wilson")}
+    %{record: record_with_artist("Steven Wilson", %{release_date: "2025-06-21"})}
   end
 
   defp api_token do
@@ -100,4 +100,35 @@ defmodule MusicLibraryWeb.CollectionControllerTest do
              }
     end
   end
+
+  describe "GET /api/collection/on_this_day" do
+    setup [:create_record]
+
+    test "it requires authentication", %{conn: conn} do
+      conn = get(conn, ~p"/api/collection/on_this_day")
+
+      assert conn.status == 401
+    end
+
+    test "it returns a list of records", %{conn: conn, record: record} do
+      conn =
+        conn
+        |> put_req_header("authorization", "Bearer #{api_token()}")
+        |> get(~p"/api/collection/on_this_day?date=2025-06-21")
+
+      assert json_response(conn, 200) == %{
+               "records" => [
+                 %{
+                   "id" => record.id,
+                   "artists" => ["Steven Wilson"],
+                   "title" => record.title,
+                   "cover_url" =>
+                     "http://localhost:4002/api/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjpudWxsfQ",
+                   "thumb_url" =>
+                     "http://localhost:4002/api/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjo0ODB9"
+                 }
+               ]
+             }
+    end
+  end
 end