Add redirection for legacy links

.env.example

@@ -23,6 +23,11 @@ LIVEWIRE_ENABLED=true
 # enable or disable log viewer. By default it is enabled.
 LOG_VIEWER_ENABLED=true
 
+# If you spread old links of to your albums in your Lychee instance starting with
+# https://lychee.text/#albumID/PhotoId
+# Set this value to true to enable redirection.
+LEGACY_V4_REDIRECT=false
+
 ##############################################################################
 # IMPORTANT: To migrate from Lychee v3 you *MUST* use the same MySQL/MariaDB #
 #            server as v3.                                                   #

app/Http/Controllers/RedirectController.php

@@ -13,6 +13,7 @@
 use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
 use Illuminate\Routing\Controller;
+use Illuminate\View\View;
 use Symfony\Component\HttpFoundation\Response as SymfonyResponse;
 
 class RedirectController extends Controller
@@ -87,4 +88,23 @@ public function photo(Request $request, string $albumID, ?string $photoID): Symf
 			throw new FrameworkException('Lychee redirection component', $e);
 		}
 	}
+
+	/**
+	 * Redirection to landing or gallery depending on the settings.
+	 * Otherwise attach a JS hook if legacy is enabled.
+	 *
+	 * @return View|SymfonyResponse
+	 */
+	public function view(): View|SymfonyResponse
+	{
+		$base_route = Configs::getValueAsBool('landing_page_enable') ? route('landing') : route('livewire-gallery');
+		if (config('app.legacy_v4_redirect') === false) {
+			return redirect($base_route);
+		}
+
+		return view('hook-redirection', [
+			'gallery' => route('livewire-gallery'),
+			'base' => $base_route,
+		]);
+	}
 }

config/app.php

@@ -92,6 +92,8 @@ function renv(string $cst, ?string $default = null): string
 
 	'asset_url' => null,
 
+	'legacy_v4_redirect' => env('LEGACY_V4_REDIRECT', false),
+
 	/*
 	|--------------------------------------------------------------------------
 	| Application URL

resources/views/hook-redirection.blade.php

@@ -0,0 +1,13 @@
+<script>
+	// Dirty work around.
+	const hashMatch = document.location.hash.replace("#", "").split("/");
+	const albumID = hashMatch[0] ?? '';
+	const photoID = hashMatch[1] ?? '';
+	if (photoID !== '') {
+		window.location = '{{ $gallery }}/' + albumID + '/' + photoID;
+	} else if (albumID !== '') {
+		window.location = '{{ $gallery }}/' + albumID;
+	} else {
+		window.location = '{{ $base }}';
+	}
+</script>

routes/web-livewire.php

@@ -4,10 +4,10 @@
 
 use App\Enum\OauthProvidersType;
 use App\Http\Controllers\Oauth;
+use App\Http\Controllers\RedirectController;
 use App\Livewire\Components\Pages\Gallery\Album;
 use App\Livewire\Components\Pages\Gallery\Albums;
 use App\Livewire\Components\Pages\Gallery\Search;
-use App\Models\Configs;
 use Illuminate\Support\Facades\Route;
 
 /*
@@ -47,9 +47,7 @@
 			Route::get('/search/{albumId?}', Search::class)->name('livewire-search');
 			Route::get('/gallery/{albumId}/', Album::class)->name('livewire-gallery-album');
 			Route::get('/gallery/{albumId}/{photoId}', Album::class)->name('livewire-gallery-photo');
-			Route::get('/', function () {
-				return redirect(Configs::getValueAsBool('landing_page_enable') ? route('landing') : route('livewire-gallery'));
-			})->name('livewire-index');
+			Route::get('/', [RedirectController::class, 'view'])->name('livewire-index');
 		});
 	});