kami_itunes_june/AppleBatch_June/ShareCodeUtils.cs

using System;
using System.Text;

namespace AppleBatch_June
{
	public class ShareCodeUtils
	{
		private static char[] BASE = new char[32]
		{
			'H', 'V', 'E', '8', 'S', '2', 'D', 'Z', 'X', '9',
			'C', '7', 'P', '5', 'I', 'K', '3', 'M', 'J', 'U',
			'F', 'R', '4', 'W', 'Y', 'L', 'T', 'N', '6', 'B',
			'G', 'Q'
		};

		private static char SUFFIX_CHAR = 'A';

		private static int BIN_LEN = BASE.Length;

		private static int CODE_LEN = 4;

		public static string idToCode(long id)
		{
			char[] array = new char[BIN_LEN];
			int num = BIN_LEN;
			while (id / BIN_LEN > 0L)
			{
				int num2 = (int)(id % BIN_LEN);
				array[--num] = BASE[num2];
				id /= BIN_LEN;
			}
			array[--num] = BASE[(int)(id % BIN_LEN)];
			string text = new string(array, num, BIN_LEN - num);
			int length = text.Length;
			if (length < CODE_LEN)
			{
				StringBuilder stringBuilder = new StringBuilder();
				stringBuilder.Append(SUFFIX_CHAR);
				Random random = new Random();
				for (int i = 0; i < CODE_LEN - length - 1; i++)
				{
					stringBuilder.Append(BASE[random.Next(BIN_LEN)]);
				}
				text += stringBuilder.ToString();
			}
			return text;
		}

		public static string idToNumber(long id, int leng)
		{
			char[] array = new char[BIN_LEN];
			int num = BIN_LEN;
			while (id / BIN_LEN > 0L)
			{
				int num2 = (int)(id % BIN_LEN);
				array[--num] = BASE[num2];
				id /= BIN_LEN;
			}
			array[--num] = BASE[(int)(id % BIN_LEN)];
			string text = new string(array, num, BIN_LEN - num);
			int length = text.Length;
			if (length < leng)
			{
				StringBuilder stringBuilder = new StringBuilder();
				stringBuilder.Append(SUFFIX_CHAR);
				Random random = new Random();
				for (int i = 0; i < leng - length - 1; i++)
				{
					stringBuilder.Append(BASE[random.Next(BIN_LEN)]);
				}
				text += stringBuilder.ToString();
			}
			string text2 = "";
			char[] array2 = text.ToCharArray();
			foreach (char c in array2)
			{
				text2 += (int)c;
			}
			return text2;
		}

		public static long codeToId(string code)
		{
			try
			{
				char[] array = code.ToCharArray();
				long num = 0L;
				for (int i = 0; i < array.Length; i++)
				{
					int num2 = 0;
					for (int j = 0; j < BIN_LEN; j++)
					{
						if (array[i] == BASE[j])
						{
							num2 = j;
							break;
						}
					}
					if (array[i] == SUFFIX_CHAR)
					{
						break;
					}
					num = ((i <= 0) ? num2 : (num * BIN_LEN + num2));
				}
				return num;
			}
			catch (Exception)
			{
				return 0L;
			}
		}
	}
}