using System;

namespace Filter.Utilities
{
	internal class Injection
	{
		public Injection()
		{
		}

		public static bool ContainsInvalidSymbol(string Message, out char InvalidSymbol)
		{
			string message = Message;
			for (int i = 0; i < message.Length; i++)
			{
				char chr = message[i];
				if (!char.IsLetterOrDigit(chr) && chr != Convert.ToChar("'") && chr != ' ' && chr != '#' && chr != '$' && chr != '.' && chr != ',' && chr != '!' && chr != '@' && chr != '\u005E' && chr != '&' && chr != '*' && chr != ':' && chr != ';' && chr != '\\' && chr != '-' && chr != '\u005F' && chr != '+' && chr != '=' && chr != '\"' && chr != '<' && chr != '>' && chr != '/' && chr != '~' && chr != '?' && chr != '[' && chr != ']' && chr != '(' && chr != ')')
				{
					InvalidSymbol = chr;
					return true;
				}
			}
			InvalidSymbol = '.';
			return false;
		}

		public static bool IsInt16(string Message)
		{
			bool flag;
			try
			{
				Convert.ToInt16(Message);
				flag = true;
			}
			catch
			{
				flag = false;
			}
			return flag;
		}

		public static bool IsInt32(string Message)
		{
			bool flag;
			try
			{
				Convert.ToInt32(Message);
				flag = true;
			}
			catch
			{
				flag = false;
			}
			return flag;
		}

		public static bool IsOnlyDigit(string Message)
		{
			string message = Message;
			for (int i = 0; i < message.Length; i++)
			{
				if (!char.IsDigit(message[i]))
				{
					return false;
				}
			}
			return true;
		}

		public static bool IsOnlyLetterOrDigit(string Message)
		{
			string message = Message;
			for (int i = 0; i < message.Length; i++)
			{
				if (!char.IsLetterOrDigit(message[i]))
				{
					return false;
				}
			}
			return true;
		}
	}
}