95 lines
2.7 KiB
C#
95 lines
2.7 KiB
C#
using System;
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using System.IO;
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using System.Runtime.Serialization;
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using System.Xml;
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using TelegramBotBase.Args;
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using TelegramBotBase.Base;
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using TelegramBotBase.Form;
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using TelegramBotBase.Interfaces;
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namespace TelegramBotBase.States;
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public class XmlStateMachine : IStateMachine
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{
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/// <summary>
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/// Will initialize the state machine.
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/// </summary>
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/// <param name="file">Path of the file and name where to save the session details.</param>
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/// <param name="fallbackStateForm">
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/// Type of Form which will be saved instead of Form which has
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/// <seealso cref="Attributes.IgnoreState" /> attribute declared. Needs to be subclass of
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/// <seealso cref="Form.FormBase" />.
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/// </param>
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/// <param name="overwrite">Declares of the file could be overwritten.</param>
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public XmlStateMachine(string file, Type fallbackStateForm = null, bool overwrite = true)
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{
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FallbackStateForm = fallbackStateForm;
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if (FallbackStateForm != null && !FallbackStateForm.IsSubclassOf(typeof(FormBase)))
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{
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throw new ArgumentException($"{nameof(FallbackStateForm)} is not a subclass of {nameof(FormBase)}");
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}
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FilePath = file ?? throw new ArgumentNullException(nameof(file));
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Overwrite = overwrite;
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}
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public string FilePath { get; set; }
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public bool Overwrite { get; set; }
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public Type FallbackStateForm { get; }
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public StateContainer LoadFormStates()
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{
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try
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{
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var serializer = new DataContractSerializer(typeof(StateContainer));
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using (var reader = new StreamReader(FilePath))
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{
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using (var xml = new XmlTextReader(reader))
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{
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var sc = serializer.ReadObject(xml) as StateContainer;
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return sc;
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}
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}
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}
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catch
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{
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}
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return new StateContainer();
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}
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public void SaveFormStates(SaveStatesEventArgs e)
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{
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if (File.Exists(FilePath))
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{
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if (!Overwrite)
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{
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throw new Exception("File exists already.");
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}
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File.Delete(FilePath);
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}
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try
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{
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var serializer = new DataContractSerializer(typeof(StateContainer));
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using (var sw = new StreamWriter(FilePath))
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{
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using (var writer = new XmlTextWriter(sw))
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{
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writer.Formatting = Formatting.Indented; // indent the Xml so it’s human readable
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serializer.WriteObject(writer, e.States);
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writer.Flush();
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}
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}
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}
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catch
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{
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}
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}
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} |