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

@@ -0,0 +1,98 @@
+<?php
+
+    namespace Socialbox\Classes\StandardMethods\EncryptionChannel;
+
+    use Socialbox\Abstracts\Method;
+    use Socialbox\Classes\Validator;
+    use Socialbox\Enums\StandardError;
+    use Socialbox\Enums\Status\EncryptionChannelStatus;
+    use Socialbox\Exceptions\DatabaseOperationException;
+    use Socialbox\Exceptions\Standard\InvalidRpcArgumentException;
+    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 EncryptionChannelReceive extends Method
+    {
+
+        /**
+         * @inheritDoc
+         */
+        public static function execute(ClientRequest $request, RpcRequest $rpcRequest): ?SerializableInterface
+        {
+            if(!$rpcRequest->containsParameter('channel_uuid'))
+            {
+                throw new MissingRpcArgumentException('channel_uuid');
+            }
+            elseif(!Validator::validateUuid($rpcRequest->getParameter('channel_uuid')))
+            {
+                throw new InvalidRpcArgumentException('channel_uuid', 'The given channel uuid is not a valid UUID V4');
+            }
+
+            try
+            {
+                $channelUuid = $rpcRequest->getParameter('channel_uuid');
+                $encryptionChannel = EncryptionChannelManager::getChannel($channelUuid);
+            }
+            catch(DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('Failed to retrieve the encryption channel', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+
+            if($encryptionChannel === null)
+            {
+                return $rpcRequest->produceError(StandardError::NOT_FOUND, 'The encryption channel does not exist');
+            }
+
+            try
+            {
+                $requestingPeer = $request->getPeer();
+            }
+            catch (DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('Failed to retrieve the peer', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+
+            if($requestingPeer === null)
+            {
+                return $rpcRequest->produceError(StandardError::UNAUTHORIZED, 'The peer is not authorized');
+            }
+
+            if(!$encryptionChannel->isParticipant($requestingPeer->getAddress()))
+            {
+                return $rpcRequest->produceError(StandardError::UNAUTHORIZED, 'The encryption channel is not accessible');
+            }
+            elseif($encryptionChannel->getStatus() !== EncryptionChannelStatus::OPENED)
+            {
+                return $rpcRequest->produceError(StandardError::FORBIDDEN, 'The encryption channel is not opened');
+            }
+
+            $acknowledge = false;
+            if($rpcRequest->containsParameter('acknowledge') && is_bool($rpcRequest->getParameter('acknowledge')) && $rpcRequest->getParameter('acknowledge'))
+            {
+                $acknowledge = true;
+            }
+
+            try
+            {
+
+                $messages = EncryptionChannelManager::receiveData(
+                    $rpcRequest->getParameter('channel_uuid'), $encryptionChannel->determineRecipient($requestingPeer->getAddress(), true)
+                );
+
+                if($acknowledge)
+                {
+                    EncryptionChannelManager::acknowledgeMessagesBatch($rpcRequest->getParameter('channel_uuid'), array_map(fn($message) => $message->getUuid(), $messages));
+                }
+            }
+            catch(DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('Failed to retrieve the messages', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+
+            return $rpcRequest->produceResponse(array_map(fn($message) => $message->toStandard(), $messages));
+        }
+    }