Add user registration method

src/Socialbox/Classes/StandardMethods/Register.php

@@ -0,0 +1,80 @@
+<?php
+
+namespace Socialbox\Classes\StandardMethods;
+
+use Socialbox\Abstracts\Method;
+use Socialbox\Classes\Configuration;
+use Socialbox\Classes\Validator;
+use Socialbox\Enums\StandardError;
+use Socialbox\Exceptions\DatabaseOperationException;
+use Socialbox\Exceptions\StandardException;
+use Socialbox\Interfaces\SerializableInterface;
+use Socialbox\Managers\RegisteredPeerManager;
+use Socialbox\Managers\SessionManager;
+use Socialbox\Objects\ClientRequest;
+use Socialbox\Objects\RpcRequest;
+
+class Register extends Method
+{
+    /**
+     * @inheritDoc
+     */
+    public static function execute(ClientRequest $request, RpcRequest $rpcRequest): ?SerializableInterface
+    {
+        if(!Configuration::getRegistrationConfiguration()->isRegistrationEnabled())
+        {
+            return $rpcRequest->produceError(StandardError::REGISTRATION_DISABLED, StandardError::REGISTRATION_DISABLED->getMessage());
+        }
+
+        // Check if the username parameter exists
+        if(!$rpcRequest->containsParameter('username'))
+        {
+            return $rpcRequest->produceError(StandardError::RPC_INVALID_ARGUMENTS, 'Missing parameter \'username\'');
+        }
+
+        // Check if the username is valid
+        if(!Validator::validateUsername($rpcRequest->getParameter('username')))
+        {
+            return $rpcRequest->produceError(StandardError::INVALID_USERNAME, StandardError::INVALID_USERNAME->getMessage());
+        }
+
+        // Check if the username exists already
+        try
+        {
+            if (RegisteredPeerManager::usernameExists($rpcRequest->getParameter('username')))
+            {
+                return $rpcRequest->produceError(StandardError::USERNAME_ALREADY_EXISTS, StandardError::USERNAME_ALREADY_EXISTS->getMessage());
+            }
+        }
+        catch (DatabaseOperationException $e)
+        {
+            throw new StandardException("There was an unexpected error while trying to check the username existence", StandardError::INTERNAL_SERVER_ERROR, $e);
+        }
+
+        // Check if the request has a Session UUID
+        if($request->getSessionUuid() === null)
+        {
+            return $rpcRequest->produceError(StandardError::SESSION_REQUIRED);
+        }
+
+        try
+        {
+            // Get the session and check if it's already authenticated
+            $session = SessionManager::getSession($request->getSessionUuid());
+            if($session->getAuthenticatedPeerUuid() !== null)
+            {
+                return $rpcRequest->produceError(StandardError::ALREADY_AUTHENTICATED);
+            }
+
+            // Create the peer & set the current's session authenticated peer as the newly created peer
+            SessionManager::updateAuthenticatedPeer($session->getUuid(), RegisteredPeerManager::createPeer($rpcRequest->getParameter('username')));
+        }
+        catch(DatabaseOperationException $e)
+        {
+            throw new StandardException("There was an unexpected error while trying to register", StandardError::INTERNAL_SERVER_ERROR, $e);
+        }
+
+        // Return true to indicate the operation was a success
+        return $rpcRequest->produceResponse(true);
+    }
+}