Add encryption handling and session flags management.

src/Socialbox/Classes/StandardMethods/Identify.php

@@ -0,0 +1,73 @@
+<?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 Identify extends Method
+    {
+        /**
+         * @inheritDoc
+         */
+        public static function execute(ClientRequest $request, RpcRequest $rpcRequest): ?SerializableInterface
+        {
+            // Check if the username parameter exists
+            if(!$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 $rpcRequest->produceError(StandardError::INVALID_USERNAME, StandardError::INVALID_USERNAME->getMessage());
+            }
+
+            // Check if the request has a Session UUID
+            if($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 the session is already authenticated, return an error
+                if($session->getPeerUuid() !== null)
+                {
+                    return $rpcRequest->produceError(StandardError::ALREADY_AUTHENTICATED);
+                }
+
+                // If the username does not exist, return an error
+                if(!RegisteredPeerManager::usernameExists($rpcRequest->getParameter('username')))
+                {
+                    return $rpcRequest->produceError(StandardError::NOT_REGISTERED, StandardError::NOT_REGISTERED->getMessage());
+                }
+
+                // Create session to be identified as the provided username
+                SessionManager::updatePeer($session->getUuid(), $rpcRequest->getParameter('username'));
+
+                // Set the required session flags
+                $initialFlags = [];
+            }
+            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);
+        }
+    }