Add database backup functionality

lib/music_library_web/components/layouts/app.html.heex

@@ -28,6 +28,15 @@
         <a class={["max-sm:hidden" | nav_link_classes()]} } href={~p"/dev/errors"}>
           {gettext("Errors")}
         </a>
+        <a class={nav_link_classes()} } href={~p"/backup"}>
+          <.icon
+            name="hero-archive-box-arrow-down"
+            class="h-4 w-4 mr-2"
+            aria-hidden="true"
+            data-slot="icon"
+          />
+          {gettext("Backup")}
+        </a>
         <a class={nav_link_classes()} } href={~p"/login"}>
           <.icon
             name="hero-arrow-left-start-on-rectangle"

lib/music_library_web/controllers/archive_controller.ex

@@ -0,0 +1,18 @@
+defmodule MusicLibraryWeb.ArchiveController do
+  use MusicLibraryWeb, :controller
+
+  def backup(conn, _params) do
+    database_path = database_path()
+    current_time = DateTime.utc_now()
+    file_name = "music_library_#{DateTime.to_unix(current_time)}.db"
+
+    send_download(conn, {:file, database_path},
+      filename: file_name,
+      content_type: "application/x-sqlite3"
+    )
+  end
+
+  defp database_path do
+    Application.get_env(:music_library, MusicLibrary.Repo)[:database]
+  end
+end

lib/music_library_web/router.ex

@@ -31,6 +31,8 @@ defmodule MusicLibraryWeb.Router do
     scope "/" do
       pipe_through :logged_in
 
+      get "/backup", ArchiveController, :backup
+
       get "/covers/:record_id", CoverController, :show
 
       live "/", StatsLive.Index, :index

priv/gettext/default.pot

@@ -123,7 +123,7 @@ msgstr ""
 msgid "Login"
 msgstr ""
 
-#: lib/music_library_web/components/layouts/app.html.heex:38
+#: lib/music_library_web/components/layouts/app.html.heex:47
 #, elixir-autogen, elixir-format
 msgid "Logout"
 msgstr ""
@@ -550,6 +550,7 @@ msgstr ""
 msgid "Album"
 msgstr ""
 
+#: lib/music_library_web/components/layouts/app.html.heex:38
 #: lib/music_library_web/components/record_components.ex:213
 #, elixir-autogen, elixir-format
 msgid "Backup"