Implement encryption channel methods and refactor related classes

src/Socialbox/Classes/StandardMethods/EncryptionChannel/EncryptionChannelExists.php

@@ -0,0 +1,37 @@
+<?php
+
+    namespace Socialbox\Classes\StandardMethods\EncryptionChannel;
+
+    use Socialbox\Abstracts\Method;
+    use Socialbox\Enums\StandardError;
+    use Socialbox\Exceptions\DatabaseOperationException;
+    use Socialbox\Exceptions\Standard\MissingRpcArgumentException;
+    use Socialbox\Exceptions\Standard\StandardRpcException;
+    use Socialbox\Interfaces\SerializableInterface;
+    use Socialbox\Managers\EncryptionChannelManager;
+    use Socialbox\Objects\ClientRequest;
+    use Socialbox\Objects\RpcRequest;
+
+    class EncryptionChannelExists extends Method
+    {
+
+        /**
+         * @inheritDoc
+         */
+        public static function execute(ClientRequest $request, RpcRequest $rpcRequest): ?SerializableInterface
+        {
+            if(!$rpcRequest->containsParameter('channel_uuid'))
+            {
+                throw new MissingRpcArgumentException('channel_uuid');
+            }
+
+            try
+            {
+                return $rpcRequest->produceResponse(EncryptionChannelManager::channelUuidExists($rpcRequest->getParameter('channel_uuid')));
+            }
+            catch (DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('An error occurred while checking if the channel exists', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+        }
+    }