88 lines
2.3 KiB
C#
88 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Xml;
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using S22.Xmpp;
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namespace RhinoReminds
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{
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public delegate void OnReminderListUpdateHandler(object sender, Reminder newReminder);
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public class ReminderList
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{
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private int nextId = 0;
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private readonly object saveLock = new object();
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public SortedList<DateTime, Reminder> Reminders = new SortedList<DateTime, Reminder>();
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public event OnReminderListUpdateHandler OnReminderListUpdate;
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public ReminderList() {
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}
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public Reminder CreateReminder(Jid inJid, DateTime time, string message) {
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Reminder result = new Reminder(nextId++, $"{inJid.Node}@{inJid.Domain}", time, message);
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Console.WriteLine($"[Rhino/ReminderList] Created reminder {result}");
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Reminders.Add(time, result);
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OnReminderListUpdate(this, result);
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return result;
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}
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public void Save(string filename)
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{
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// Make sure that the reminder thread doesn't try to save the reminders at the exact same time
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// we receive a request for a new reminder
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lock (saveLock) { // FUTURE: We could go lockless here with some work, but it's not worth it for the teeny chance & low overhead
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XmlWriter xml = XmlWriter.Create(
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filename,
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new XmlWriterSettings() { Indent = true }
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);
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xml.WriteStartDocument();
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xml.WriteStartElement("ReminderList");
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xml.WriteElementString("NextId", nextId.ToString());
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xml.WriteStartElement("Reminders");
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foreach (Reminder nextReminder in Reminders.Values)
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nextReminder.WriteToXml(xml);
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xml.WriteEndElement();
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xml.WriteEndElement();
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xml.WriteEndDocument();
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xml.Close();
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}
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}
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public Reminder GetNextReminder()
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{
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if (Reminders.Count == 0)
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return null;
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return Reminders.Values[0];
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}
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public void DeleteReminder(Reminder nextReminder) {
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Reminders.Remove(nextReminder.Time);
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}
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public static ReminderList FromXmlFile(string filepath)
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{
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XmlDocument xml = new XmlDocument();
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xml.Load(filepath);
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ReminderList result = new ReminderList();
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result.nextId = int.Parse(xml.GetElementsByTagName("NextId")[0].InnerText);
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foreach (XmlNode reminderXML in xml.GetElementsByTagName("Reminders")[0].ChildNodes) {
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Reminder nextReminder = Reminder.FromXml(reminderXML);
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result.Reminders.Add(nextReminder.Time, nextReminder);
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}
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return result;
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}
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}
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}
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