Rdf deref

.env.example

@@ -84,3 +84,10 @@ AWS_BUCKET=
 AWS_USE_PATH_STYLE_ENDPOINT=false
 
 VITE_APP_NAME="${APP_NAME}"
+
+######################
+#### RDF SETTINGS ####
+######################
+SPARQL_ENDPOINT='https://idsm.elixir-czech.cz/sparql/endpoint/molmedb'
+SPARQL_QUERY_PREFIX='?query='
+DB_RDF_PREFIX='https://rdf.molmedb.upol.cz/'

app/Helpers/SPARQLurl.php

@@ -0,0 +1,17 @@
+<?php
+namespace App\Helpers;
+
+class SPARQLurl {
+    public static function rdfDescribeUrl($rdf_suffix)
+    {
+        $ep = env('SPARQL_ENDPOINT');
+        $rdf_prefix = env('DB_RDF_PREFIX');
+        $sparql_prefix = env('SPARQL_QUERY_PREFIX');
+        $suffix = urldecode($rdf_suffix);
+
+        $fullUri = $rdf_prefix . ltrim($suffix, '/');
+        $query = rawurlencode('DESCRIBE <'.$fullUri.'>');
+        $uiUrl = $ep.$sparql_prefix.$query;
+        return $uiUrl;
+    }
+}

app/Http/Controllers/RdfController.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Helpers\SPARQLurl;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Http;
+
+class RdfController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index()
+    {
+        //
+    }
+
+    /**
+     * return redirect to external SPARQL endpoint for RDF/Semantic queries
+     */
+    public function simple_rdf($rdf_suffix)
+    {
+        // Validate the suffix after URL-decoding so we can return a custom
+        // status code when the suffix contains disallowed characters.
+        $decoded = urldecode($rdf_suffix);
+
+        // Allowed characters: letters, numbers, slash, dash, underscore and dot
+        $allowedPattern = '/^[A-Za-z0-9\/\-_.]+$/';
+        if (!preg_match($allowedPattern, $decoded)) {
+            return response()->json(['error' => 'Invalid RDF suffix'], 400);
+        }
+
+        $uiUrl = SPARQLurl::rdfDescribeUrl($rdf_suffix);
+        return redirect()->away($uiUrl, 303);
+
+    }
+}

routes/api.php

@@ -6,6 +6,7 @@
 use App\Http\Controllers\MethodController;
 use App\Http\Controllers\ProteinController;
 use App\Http\Controllers\PublicationController;
+use App\Http\Controllers\RdfController;
 use App\Http\Controllers\SearchController;
 use App\Http\Controllers\StatsController;
 use App\Http\Controllers\StructureController;
@@ -97,4 +98,7 @@
             Route::get('/{identifier}/form/select/methods', 'formSelectMethods');
             Route::get('/{identifier}/similarities', 'similarities');
         });
+
+    Route::get('rdf/{rdf_suffix}', [RdfController::class, 'simple_rdf'])
+        ->where('rdf_suffix', '.*');
 });