RVRNEXT-2 add database accessors for oauth tokens

src/Repository/OAuthTokenRepository.php

@@ -0,0 +1,38 @@
+<?php namespace RVR\Repository;
+
+use DateTime;
+use Generator;
+use SokoWeb\Database\Query\Select;
+use RVR\PersistentData\Model\OAuthToken;
+use SokoWeb\PersistentData\PersistentDataManager;
+
+class OAuthTokenRepository
+{
+    private PersistentDataManager $pdm;
+
+    public function __construct()
+    {
+        $this->pdm = new PersistentDataManager();
+    }
+
+    public function getById(int $id): ?OAuthToken
+    {
+        return $this->pdm->selectFromDbById($id, OAuthToken::class);
+    }
+
+    public function getByCode(string $code): ?OAuthToken
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('code', '=', $code);
+
+        return $this->pdm->selectFromDb($select, OAuthToken::class);
+    }
+
+    public function getAllExpired(): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('expires', '<', (new DateTime())->format('Y-m-d H:i:s'));
+
+        yield from $this->pdm->selectMultipleFromDb($select, OAuthToken::class);
+    }
+}