Add a global prefix to generated ids

src/Config/ActivityPubConfig.php

@@ -34,6 +34,11 @@ class ActivityPubConfig
      */
     private $jsonLdContext;
 
+    /**
+     * @var string
+     */
+    private $idPathPrefix;
+
     /**
      * Don't call this directly - instead, use 
      * ActivityPubConfig->createBuilder()->build()
@@ -47,6 +52,7 @@ class ActivityPubConfig
         $this->dbPrefix = $builder->getDbPrefix();
         $this->authFunction = $builder->getAuthFunction();
         $this->jsonLdContext = $builder->getJsonLdContext();
+        $this->idPathPrefix = $builder->getIdPathPrefix();
     }
 
     public function createBuilder()
@@ -55,7 +61,7 @@ class ActivityPubConfig
     }
 
     /**
-     * @var array
+     * @return array
      */
     public function getDbConnectionParams()
     {
@@ -63,7 +69,7 @@ class ActivityPubConfig
     }
 
     /**
-     * @var bool
+     * @return bool
      */
     public function getIsDevMode()
     {
@@ -71,7 +77,7 @@ class ActivityPubConfig
     }
 
     /**
-     * @var string
+     * @return string
      */
     public function getDbPrefix()
     {
@@ -80,7 +86,7 @@ class ActivityPubConfig
     }
 
     /**
-     * @var Callable
+     * @return Callable
      */
     public function getAuthFunction()
     {
@@ -88,11 +94,19 @@ class ActivityPubConfig
     }
 
     /**
-     * @var array
+     * @return array
      */
     public function getJsonLdContext()
     {
         return $this->jsonLdContext;
     }
+
+    /**
+     * @return string
+     */
+    public function getIdPathPrefix()
+    {
+        return $this->idPathPrefix;
+    }
 }
 ?>

src/Config/ActivityPubConfigBuilder.php

@@ -3,6 +3,7 @@ namespace ActivityPub\Config;
 
 use ActivityPub\Config\ActivityPubConfig;
 use ActivityPub\Objects\ContextProvider;
+use ActivityPub\Objects\IdProvider;
 
 /**
  * The ActivityPubConfigBuilder is a builder class to create ActivityPub config data
@@ -19,6 +20,8 @@ use ActivityPub\Objects\ContextProvider;
  */
 class ActivityPubConfigBuilder
 {
+    const DEFAULT_ID_PATH_PREFIX = 'ap';
+
     /**
      * @var array
      */
@@ -44,6 +47,11 @@ class ActivityPubConfigBuilder
      */
     private $jsonLdContext;
 
+    /**
+     * @var string
+     */
+    private $idPathPrefix;
+
     /**
      * Creates a new ActivityPubConfig instance with default values
      *
@@ -57,6 +65,7 @@ class ActivityPubConfigBuilder
             return false;
         };
         $this->jsonLDContext = ContextProvider::DEFAULT_CONTEXT;
+        $this->idPathPrefix = IdProvider::DEFAULT_ID_PATH_PREFIX;
     }
 
     /**
@@ -191,9 +200,35 @@ class ActivityPubConfigBuilder
         return $this;
     }
 
+    /**
+     * @return array
+     */
     public function getJsonLdContext()
     {
         return $this->jsonLdContext;
     }
+
+    /**
+     * The `idPathPrefix` is a string that is prepended to all ids generated by
+     * by the ActivityPub library. For example, if the `idPathPrefix` is 'ap',
+     * the library will generate ids that look like 'https://example.com/ap/note/1'.
+     *
+     * Default: 'ap'
+     * @param string $idPathPrefix The id path prefix
+     * @return ActivityPubConfigBuilder The builder instance
+     */
+    public function setIdPathPrefix( string $idPathPrefix )
+    {
+        $this->idPathPrefix = $idPathPrefix;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getIdPathPrefix()
+    {
+        return $this->idPathPrefix;
+    }
 }
 ?>

src/Config/ActivityPubModule.php

@@ -88,7 +88,8 @@ class ActivityPubModule
 
         $this->injector->register( IdProvider::class, IdProvider::class )
             ->addArgument( new Reference( ObjectsService::class ) )
-            ->addArgument( new Reference( RandomProvider::class ) );
+            ->addArgument( new Reference( RandomProvider::class ) )
+            ->addArgument( $config->getIdPathPrefix() );
 
         $this->injector->register( GetController::class, GetController::class )
             ->addArgument( new Reference( ObjectsService::class ) )

src/Objects/IdProvider.php

@@ -10,6 +10,7 @@ use Symfony\Component\HttpFoundation\Request;
  */
 class IdProvider
 {
+    const DEFAULT_ID_PATH_PREFIX = 'ap';
     const ID_LENGTH = 12;
 
     /**
@@ -22,10 +23,21 @@ class IdProvider
      */
     private $randomProvider;
 
-    public function __construct( ObjectsService $objectsService, RandomProvider $randomProvider )
+    /**
+     * $pathPrefix gets prepended to all generated id paths
+     *
+     * It should not have a leading or a trailing slash.
+     * @var string
+     */
+    private $pathPrefix;
+
+    public function __construct( ObjectsService $objectsService,
+                                 RandomProvider $randomProvider,
+                                 string $pathPrefix )
     {
         $this->objectsService = $objectsService;
         $this->randomProvider = $randomProvider;
+        $this->pathPrefix = $pathPrefix;
     }
 
     /**
@@ -34,14 +46,14 @@ class IdProvider
      * Ids look like "https://$host/$path/$randomString"
      * @param Request $request The current request
      * @param string $path The path for the the id URL, just before the random string
-     *   Default: "object"
+     *   and after the path prefix. Default: "object"
      * @return string The new id
      */
     public function getId( Request $request, string $path = "objects" )
     {
         $baseUri = $request->getSchemeAndHttpHost();
         if ( ! empty( $path ) ) {
-            $baseUri = $baseUri . "/$path";
+            $baseUri = $baseUri . "/{$this->pathPrefix}/$path";
         }
         $rnd = $this->randomProvider->randomString( self::ID_LENGTH );
         $id = $baseUri . "/$rnd";

test/Objects/IdProviderTest.php

@@ -16,14 +16,17 @@ class IdProviderTest extends TestCase
     public function setUp()
     {
         $this->objectsService = $this->createMock( ObjectsService::class );
-        $this->objectsService->method( 'query' )->will( $this->returnCallback( function( $query) {
+        $this->objectsService->method( 'query' )
-            $existsId = sprintf( 'https://example.com/objects/%s', self::EXISTING_ID_STR );
+            ->will( $this->returnCallback( function( $query) {
-            if ( array_key_exists( 'id', $query ) && $query['id'] == $existsId ) {
+                $existsId = sprintf(
-                return array( 'existingObject' );
+                    'https://example.com/ap/objects/%s', self::EXISTING_ID_STR
-            } else {
+                );
-                return array();
+                if ( array_key_exists( 'id', $query ) && $query['id'] == $existsId ) {
-            }
+                    return array( 'existingObject' );
-        } ) );
+                } else {
+                    return array();
+                }
+            } ) );
     }
 
     public function testIdProvider()
@@ -32,18 +35,18 @@ class IdProviderTest extends TestCase
             array(
                 'id' => 'providesId',
                 'providedRnd' => array( 'foo' ),
-                'expectedId' => 'https://example.com/objects/foo',
+                'expectedId' => 'https://example.com/ap/objects/foo',
             ),
             array(
                 'id' => 'checksForExisting',
                 'providedRnd' => array( self::EXISTING_ID_STR, 'bar' ),
-                'expectedId' => 'https://example.com/objects/bar',
+                'expectedId' => 'https://example.com/ap/objects/bar',
             ),
             array(
                 'id' => 'addsPath',
                 'providedRnd' => array( 'foo' ),
                 'path' => 'notes',
-                'expectedId' => 'https://example.com/notes/foo',
+                'expectedId' => 'https://example.com/ap/notes/foo',
             ),
         );
         foreach ( $testCases as $testCase ) {
@@ -52,7 +55,7 @@ class IdProviderTest extends TestCase
                 array( $randomProvider->method( 'randomString' ), 'willReturnOnConsecutiveCalls' ),
                 $testCase['providedRnd']
             );
-            $idProvider = new IdProvider( $this->objectsService, $randomProvider );
+            $idProvider = new IdProvider( $this->objectsService, $randomProvider, 'ap' );
             $request = Request::create( 'https://example.com' );
             $id = '';
             if ( array_key_exists( 'path', $testCase ) ) {