ListScreenAdmin.php
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<?php
namespace AC\Controller\Middleware;
use AC;
use AC\Admin\Preference;
use AC\ListScreen;
use AC\ListScreenFactory;
use AC\ListScreenRepository\Storage;
use AC\Middleware;
use AC\Request;
use AC\Type\ListScreenId;
use Exception;
class ListScreenAdmin implements Middleware
{
private $storage;
private $preference;
private $list_screen_factory;
private $list_keys_factory;
public function __construct(
Storage $storage,
Preference\ListScreen $preference,
ListScreenFactory $list_screen_factory,
AC\Table\ListKeysFactoryInterface $list_keys_factory
) {
$this->storage = $storage;
$this->preference = $preference;
$this->list_screen_factory = $list_screen_factory;
$this->list_keys_factory = $list_keys_factory;
}
private function get_list_id(Request $request): ?ListScreenId
{
try {
$list_id = new ListScreenId((string)$request->get('layout_id'));
} catch (Exception $e) {
return null;
}
return $list_id;
}
private function get_list_key(Request $request): ?string
{
$list_key = (string)$request->get('list_screen');
if ( ! $this->list_key_exists($list_key)) {
$list_key = (string)$this->preference->get_last_visited_list_key();
}
if ( ! $this->list_key_exists($list_key)) {
$list_key = (string)$this->list_keys_factory->create()->current();
}
return $this->list_key_exists($list_key)
? $list_key
: null;
}
private function list_key_exists(string $list_key): bool
{
return $this->list_screen_factory->can_create($list_key);
}
private function get_list_screen(Request $request): ?ListScreen
{
$list_id = $this->get_list_id($request);
if ($list_id && $this->storage->exists($list_id)) {
return $this->storage->find($list_id);
}
$list_key = $this->get_list_key($request);
if ( ! $list_key) {
return null;
}
if ( ! $this->list_screen_factory->can_create($list_key)) {
return null;
}
$list_screen = $this->get_last_visited_listscreen($list_key);
if ( ! $list_screen) {
$list_screen = $this->get_first_listscreen($list_key);
}
if ( ! $list_screen) {
$list_screen = $this->list_screen_factory->create($list_key);
}
return $list_screen;
}
private function get_first_listscreen(string $list_key): ?ListScreen
{
$list_screens = $this->storage->find_all_by_key($list_key);
return $list_screens->count() > 0
? $list_screens->current()
: null;
}
private function get_last_visited_listscreen(string $list_key): ?ListScreen
{
try {
$list_id = new ListScreenId((string)$this->preference->get_list_id($list_key));
} catch (Exception $e) {
return null;
}
$list_screen = $this->storage->find($list_id);
return $list_screen && $list_screen->get_key() === $list_key
? $list_screen
: null;
}
private function set_preference_screen(ListScreen $list_screen): void
{
$this->preference->set_last_visited_list_key($list_screen->get_key());
if ($list_screen->has_id()) {
$this->preference->set_list_id($list_screen->get_key(), $list_screen->get_id()->get_id());
}
}
public function handle(Request $request): void
{
$list_screen = $this->get_list_screen($request);
if ( ! $list_screen) {
return;
}
$this->set_preference_screen($list_screen);
$request->get_parameters()->merge([
'list_screen' => $list_screen,
]);
}
}