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