feat(rls): add multi-org checking when no org filter is provided

src/rls.sql

@@ -48,9 +48,31 @@ $$;
 COMMENT ON FUNCTION morbac.current_org_id() IS
 'Returns current organization ID from morbac.org_id session variable';
 
+CREATE OR REPLACE FUNCTION morbac.get_user_orgs(p_user_id UUID)
+RETURNS TABLE(org_id UUID)
+LANGUAGE sql
+STABLE
+AS $$
+    SELECT DISTINCT ur.org_id
+    FROM morbac.user_roles ur
+    WHERE ur.user_id = p_user_id
+    UNION
+    SELECT DISTINCT d.org_id
+    FROM morbac.delegations d
+    WHERE d.delegatee_id = p_user_id
+      AND NOT d.revoked
+      AND now() BETWEEN d.valid_from AND d.valid_until;
+$$;
+
+COMMENT ON FUNCTION morbac.get_user_orgs(UUID) IS
+'Returns all org IDs the user has any direct role or active delegation in';
+
+-- When p_row_org_id is provided and session org is NULL, checks permission in the row org (multi-org mode).
+-- Usage: morbac.rls_check('read', 'documents', org_id)
 CREATE OR REPLACE FUNCTION morbac.rls_check(
     p_activity   TEXT,
-    p_view TEXT
+    p_view       TEXT,
+    p_row_org_id UUID DEFAULT NULL
 )
 RETURNS BOOLEAN
 LANGUAGE plpgsql
@@ -63,13 +85,24 @@ BEGIN
     v_user_id := morbac.current_user_id();
     v_org_id  := morbac.current_org_id();
 
-    IF v_user_id IS NULL OR v_org_id IS NULL THEN
+    IF v_user_id IS NULL THEN
         RETURN FALSE;
     END IF;
 
+    IF v_org_id IS NOT NULL THEN
+        IF p_row_org_id IS NOT NULL AND p_row_org_id <> v_org_id THEN
+            RETURN FALSE;
+        END IF;
         RETURN morbac.is_allowed(v_user_id, v_org_id, p_activity, p_view);
+    END IF;
+
+    IF p_row_org_id IS NOT NULL THEN
+        RETURN morbac.is_allowed(v_user_id, p_row_org_id, p_activity, p_view);
+    END IF;
+
+    RETURN FALSE;
 END;
 $$;
 
-COMMENT ON FUNCTION morbac.rls_check(TEXT, TEXT) IS
+COMMENT ON FUNCTION morbac.rls_check(TEXT, TEXT, UUID) IS
-'RLS helper: checks if current user is allowed to perform activity on view in current org';
+'RLS helper: checks if current user is allowed to perform activity on view. Pass row org_id to enable multi-org mode when no session org is set.';