Add new Enums to enhance error handling and session management

src/Socialbox/Enums/StandardError.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Socialbox\Enums;
+
+enum StandardError : int
+{
+    // Fallback Codes
+    case UNKNOWN = -1;
+
+    // RPC Errors
+    case RPC_METHOD_NOT_FOUND = -1000;
+    case RPC_INVALID_ARGUMENTS = -1001;
+
+    // Server Errors
+    case INTERNAL_SERVER_ERROR = -2000;
+    case SERVER_UNAVAILABLE = -2001;
+
+    // Authentication/Cryptography Errors
+    case INVALID_PUBLIC_KEY = -3000;
+    case SESSION_NOT_FOUND = -3001;
+    case UNSUPPORTED_AUTHENTICATION_TYPE = -3002;
+
+    /**
+     * Returns the default generic message for the error
+     *
+     * @return string
+     */
+    public function getMessage(): string
+    {
+        return match ($this)
+        {
+            self::UNKNOWN => 'Unknown Error',
+
+            self::RPC_METHOD_NOT_FOUND => 'The request method was not found',
+            self::RPC_INVALID_ARGUMENTS => 'The request method contains one or more invalid arguments',
+
+            self::INTERNAL_SERVER_ERROR => 'Internal server error',
+            self::SERVER_UNAVAILABLE => 'Server temporarily unavailable',
+
+            self::INVALID_PUBLIC_KEY => 'The given public key is not valid',
+            self::SESSION_NOT_FOUND => 'The requested session UUID was not found',
+            self::UNSUPPORTED_AUTHENTICATION_TYPE => 'The requested authentication type is not supported by the server'
+        };
+
+    }
+}