Add EncryptionChannelRejectMessage class to handle message rejection in encryption channels

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

@@ -0,0 +1,221 @@
+<?php
+
+    namespace Socialbox\Classes\StandardMethods\EncryptionChannel;
+
+    use Exception;
+    use Socialbox\Abstracts\Method;
+    use Socialbox\Classes\Logger;
+    use Socialbox\Classes\Validator;
+    use Socialbox\Enums\StandardError;
+    use Socialbox\Enums\Status\EncryptionChannelStatus;
+    use Socialbox\Exceptions\DatabaseOperationException;
+    use Socialbox\Exceptions\RpcException;
+    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\Database\EncryptionChannelRecord;
+    use Socialbox\Objects\RpcRequest;
+    use Socialbox\Socialbox;
+
+    class EncryptionChannelRejectMessage 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($rpcRequest->getParameter('channel_uuid')))
+            {
+                throw new InvalidRpcArgumentException('channel_uuid', 'The given channel uuid is not a valid UUID V4');
+            }
+
+            if(!$rpcRequest->containsParameter('message_uuid'))
+            {
+                throw new MissingRpcArgumentException('message_uuid');
+            }
+            elseif(!is_string($rpcRequest->getParameter('message_uuid')))
+            {
+                throw new InvalidRpcArgumentException('message_uuid', 'Must be type string');
+            }
+            elseif(!Validator::validateUuid($rpcRequest->getParameter('message_uuid')))
+            {
+                throw new InvalidRpcArgumentException('message_uuid', 'Invalid message 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 $rpcRequest->produceError(StandardError::NOT_FOUND, 'The encryption channel does not exist');
+            }
+
+            try
+            {
+                if ($request->isExternal())
+                {
+                    return self::handleExternal($request, $rpcRequest, $encryptionChannel);
+                }
+            }
+            catch (DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('Failed to reject the message', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+
+            return self::handleInternal($request, $rpcRequest, $encryptionChannel);
+        }
+
+        /**
+         * Handles the external execution of the method.
+         *
+         * @param ClientRequest $request The client request instance.
+         * @param RpcRequest $rpcRequest The RPC request instance.
+         * @param EncryptionChannelRecord $encryptionChannel The encryption channel record.
+         * @return SerializableInterface|null The response to the request.
+         * @throws StandardRpcException If an error occurs.
+         */
+        public static function handleExternal(ClientRequest $request, RpcRequest $rpcRequest, EncryptionChannelRecord $encryptionChannel): ?SerializableInterface
+        {
+            if($request->getIdentifyAs() === null)
+            {
+                return $rpcRequest->produceError(StandardError::BAD_REQUEST, 'The IdentifyAs header is missing');
+            }
+
+            $requestingPeerAddress = $request->getIdentifyAs();
+            if(!$encryptionChannel->isParticipant($requestingPeerAddress))
+            {
+                return $rpcRequest->produceError(StandardError::UNAUTHORIZED, 'The encryption channel is not accessible');
+            }
+
+            try
+            {
+                $message = EncryptionChannelManager::getMessageRecord($rpcRequest->getParameter('channel_uuid'), $rpcRequest->getParameter('message_uuid'));
+
+                if($message === null)
+                {
+                    return $rpcRequest->produceError(StandardError::NOT_FOUND, 'The message does not exist');
+                }
+
+                if($message->getReceiver($encryptionChannel)->getAddress() !== $requestingPeerAddress)
+                {
+                    return $rpcRequest->produceError(StandardError::UNAUTHORIZED, 'The message is not for the requesting peer');
+                }
+
+                EncryptionChannelManager::rejectMessage(
+                    $rpcRequest->getParameter('channel_uuid'), $rpcRequest->getParameter('message_uuid')
+                );
+            }
+            catch(DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('Failed to reject the message', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+
+            return $rpcRequest->produceResponse(true);
+        }
+
+        /**
+         * Handles the internal execution of the method.
+         *
+         * @param ClientRequest $request The client request instance.
+         * @param RpcRequest $rpcRequest The RPC request instance.
+         * @param EncryptionChannelRecord $encryptionChannel The encryption channel record.
+         * @return SerializableInterface|null The response to the request.
+         * @throws StandardRpcException If an error occurs.
+         */
+        public static function handleInternal(ClientRequest $request, RpcRequest $rpcRequest, EncryptionChannelRecord $encryptionChannel): ?SerializableInterface
+        {
+            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');
+            }
+
+            try
+            {
+                $message = EncryptionChannelManager::getMessageRecord($rpcRequest->getParameter('channel_uuid'), $rpcRequest->getParameter('message_uuid'));
+
+                if($message === null)
+                {
+                    return $rpcRequest->produceError(StandardError::NOT_FOUND, 'The message does not exist');
+                }
+
+                if($message->getReceiver($encryptionChannel)->getAddress() !== $requestingPeer->getAddress())
+                {
+                    return $rpcRequest->produceError(StandardError::UNAUTHORIZED, 'The message is not for the requesting peer');
+                }
+
+                EncryptionChannelManager::acknowledgeMessage(
+                    $rpcRequest->getParameter('channel_uuid'), $rpcRequest->getParameter('message_uuid')
+                );
+            }
+            catch(DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('Failed to acknowledge the message', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+
+            if($message->getOwner($encryptionChannel)->isExternal())
+            {
+                try
+                {
+                    $rpcClient = Socialbox::getExternalSession($message->getOwner($encryptionChannel)->getDomain());
+                    $rpcClient->encryptionChannelRejectMessage(
+                        channelUuid: $rpcRequest->getParameter('channel_uuid'),
+                        messageUuid: $rpcRequest->getParameter('message_uuid'),
+                        identifiedAs: $requestingPeer->getAddress()
+                    );
+                }
+                catch(Exception $e)
+                {
+                    try
+                    {
+                        EncryptionChannelManager::rejectMessage($rpcRequest->getParameter('channel_uuid'), $rpcRequest->getParameter('message_uuid'), true);
+                    }
+                    catch (DatabaseOperationException $e)
+                    {
+                        Logger::getLogger()->error('Error rejecting message as server', $e);
+                    }
+
+                    if($e instanceof RpcException)
+                    {
+                        throw StandardRpcException::fromRpcException($e);
+                    }
+
+                    throw new StandardRpcException('Failed to acknowledge the message with the external server', StandardError::INTERNAL_SERVER_ERROR, $e);
+                }
+            }
+
+            return $rpcRequest->produceResponse(true);
+        }
+    }