ModernUO/Projects/UOContent/Accounting/Accounts.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Xml;

namespace Server.Accounting
{
    public static class Accounts
    {
        private static Dictionary<string, IAccount> m_Accounts = new Dictionary<string, IAccount>();

        static Accounts()
        {
        }

        public static int Count => m_Accounts.Count;

        public static void Configure()
        {
            EventSink.WorldLoad += Load;
            EventSink.WorldSave += Save;
        }

        public static IEnumerable<IAccount> GetAccounts() => m_Accounts.Values;

        public static IAccount GetAccount(string username)
        {
            m_Accounts.TryGetValue(username, out var a);

            return a;
        }

        public static void Add(IAccount a)
        {
            m_Accounts[a.Username] = a;
        }

        public static void Remove(string username)
        {
            m_Accounts.Remove(username);
        }

        public static void Load()
        {
            m_Accounts = new Dictionary<string, IAccount>(32, StringComparer.OrdinalIgnoreCase);

            var filePath = Path.Combine("Saves/Accounts", "accounts.xml");

            if (!File.Exists(filePath))
            {
                return;
            }

            var doc = new XmlDocument();
            doc.Load(filePath);

            var root = doc["accounts"];

            if (root == null)
            {
                throw new FileLoadException("Unable to load xml file");
            }

            foreach (XmlElement account in root.GetElementsByTagName("account"))
            {
                try
                {
                    new Account(account);
                }
                catch
                {
                    Console.WriteLine("Warning: Account instance load failed");
                }
            }
        }

        public static void Save()
        {
            AssemblyHandler.EnsureDirectory("Saves/Accounts");

            var filePath = Path.Combine("Saves/Accounts", "accounts.xml");

            using var op = new StreamWriter(filePath);
            var xml = new XmlTextWriter(op) { Formatting = Formatting.Indented, IndentChar = '\t', Indentation = 1 };

            xml.WriteStartDocument(true);

            xml.WriteStartElement("accounts");

            xml.WriteAttributeString("count", m_Accounts.Count.ToString());

            foreach (Account a in GetAccounts())
            {
                a.Save(xml);
            }

            xml.WriteEndElement();

            xml.Close();
        }
    }
}