implement community basics

src/Repository/CommunityMemberRepository.php

@@ -0,0 +1,48 @@
+<?php namespace RVR\Repository;
+
+use Generator;
+use RVR\PersistentData\Model\Community;
+use RVR\PersistentData\Model\CommunityMember;
+use RVR\PersistentData\Model\User;
+use SokoWeb\Database\Query\Select;
+use SokoWeb\PersistentData\PersistentDataManager;
+
+class CommunityMemberRepository
+{
+    private PersistentDataManager $pdm;
+
+    public function __construct()
+    {
+        $this->pdm = new PersistentDataManager();
+    }
+
+    public function getById(int $id): ?CommunityMember
+    {
+        return $this->pdm->selectFromDbById($id, CommunityMember::class);
+    }
+
+    public function getAllByCommunity(Community $community, bool $useRelations = false): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('community_id', '=', $community->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, CommunityMember::class, $useRelations);
+    }
+
+    public function getAllByUser(User $user, bool $useRelations = false): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('user_id', '=', $user->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, CommunityMember::class, $useRelations);
+    }
+
+    public function getByCommunityAndUser(Community $community, User $user) : ?CommunityMember
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('community_id', '=', $community->getId());
+        $select->where('user_id', '=', $user->getId());
+
+        return $this->pdm->selectFromDb($select, CommunityMember::class);
+    }
+}