MAPG-235 updated structure and created models

src/Repository/UserInChallengeRepository.php

@@ -0,0 +1,34 @@
+<?php namespace MapGuesser\Repository;
+
+use Generator;
+use MapGuesser\Database\Query\Select;
+use MapGuesser\PersistentData\Model\Challenge;
+use MapGuesser\PersistentData\Model\User;
+use MapGuesser\PersistentData\Model\UserInChallenge;
+use MapGuesser\PersistentData\PersistentDataManager;
+
+class UserInChallengeRepository
+{
+    private PersistentDataManager $pdm;
+
+    public function __construct()
+    {
+        $this->pdm = new PersistentDataManager();
+    }
+
+    public function getAllByUser(User $user) : Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('user_id', '=', $user->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, UserInChallenge::class);
+    }
+
+    public function getAllByChallenge(Challenge $challenge) : Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('challenge_id', '=', $challenge->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, UserInChallenge::class);
+    }
+}