295 lines
10 KiB
C#
295 lines
10 KiB
C#
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/// Copyright 2016 Kopano b.v.
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///
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/// This program is free software: you can redistribute it and/or modify
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/// it under the terms of the GNU Affero General Public License, version 3,
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/// as published by the Free Software Foundation.
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///
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/// This program is distributed in the hope that it will be useful,
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/// but WITHOUT ANY WARRANTY; without even the implied warranty of
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/// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
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/// GNU Affero General Public License for more details.
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///
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/// You should have received a copy of the GNU Affero General Public License
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/// along with this program.If not, see<http://www.gnu.org/licenses/>.
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///
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/// Consult LICENSE file for details
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using Microsoft.Office.Interop.Outlook;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using Acacia.Stubs;
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using Acacia.Stubs.OutlookWrappers;
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namespace Acacia.Utils
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{
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/// <summary>
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/// Handles registration for events on mail items. To register for these, each individual MailItem must be registered,
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/// which can be done in the Application.ItemLoad event. This class hides that implementation and also ensures the
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/// event registrations are removed when the item is unloaded, to prevent resource leaks.
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/// </summary>
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/// TODO: this name is now wrong
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public class MailEvents
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{
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#region Events
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public delegate void MailEventHandler(IMailItem mail);
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public delegate void MailResponseEventHandler(IMailItem mail, IMailItem response);
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public delegate void ItemEventHandler(IItem item);
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public delegate void CancellableItemEventHandler(IItem item, ref bool cancel);
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public delegate void CancellableMailItemEventHandler(IMailItem item, ref bool cancel);
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/// <summary>
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/// Hooks into Reply(All) and Forward events
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/// </summary>
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public event MailResponseEventHandler Respond;
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public event MailResponseEventHandler Reply;
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private void OnReply(MailItem mail, MailItem response)
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{
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try
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{
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if ((Reply != null || Respond != null) && mail != null)
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{
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using (IMailItem mailWrapped = Mapping.Wrap<IMailItem>(mail, false),
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responseWrapped = Mapping.Wrap<IMailItem>(response))
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{
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if (Reply != null)
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Reply(mailWrapped, responseWrapped);
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if (Respond != null)
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Respond(mailWrapped, responseWrapped);
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}
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}
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}
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catch (System.Exception e)
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{
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Logger.Instance.Error(this, "OnReply: {0}", e);
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}
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}
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public event MailResponseEventHandler ReplyAll;
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private void OnReplyAll(MailItem mail, MailItem response)
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{
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try
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{
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if ((ReplyAll != null || Respond != null) && mail != null)
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{
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using (IMailItem mailWrapped = Mapping.Wrap<IMailItem>(mail, false),
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responseWrapped = Mapping.Wrap<IMailItem>(response))
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{
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if (ReplyAll != null)
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ReplyAll(mailWrapped, responseWrapped);
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if (Respond != null)
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Respond(mailWrapped, responseWrapped);
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}
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}
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}
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catch (System.Exception e)
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{
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Logger.Instance.Error(this, "OnReplyAll: {0}", e);
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}
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}
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public event MailResponseEventHandler Forward;
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private void OnForward(MailItem mail, MailItem response)
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{
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try
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{
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if ((Forward != null || Respond != null) && mail != null)
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{
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using (IMailItem mailWrapped = Mapping.Wrap<IMailItem>(mail, false),
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responseWrapped = Mapping.Wrap<IMailItem>(response))
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{
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if (Forward != null)
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Forward(mailWrapped, responseWrapped);
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if (Respond != null)
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Respond(mailWrapped, responseWrapped);
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}
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}
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}
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catch (System.Exception e)
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{
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Logger.Instance.Error(this, "OnForward: {0}", e);
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}
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}
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public event MailEventHandler Read;
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private void OnRead(MailItem mail)
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{
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try
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{
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if (Read != null && mail != null)
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{
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using (IMailItem wrapped = Mapping.Wrap<IMailItem>(mail, false))
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{
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Read(wrapped);
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}
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}
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}
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catch (System.Exception e)
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{
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Logger.Instance.Error(this, "OnRead: {0}", e);
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}
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}
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public event CancellableItemEventHandler BeforeDelete;
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private void OnBeforeDelete(object item, ref bool cancel)
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{
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try
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{
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if (BeforeDelete != null && item != null)
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{
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using (IItem wrapped = Mapping.Wrap<IItem>(item, false))
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{
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if (wrapped != null)
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BeforeDelete(wrapped, ref cancel);
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}
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}
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}
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catch(System.Exception e)
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{
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Logger.Instance.Error(this, "OnBeforeDelete: {0}", e);
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}
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}
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// TODO: should this be CancellableMailItemEventHandler?
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public event CancellableItemEventHandler Write;
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private void OnWrite(object item, ref bool cancel)
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{
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try
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{
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if (Write != null && item != null)
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{
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using (IItem wrapped = Mapping.Wrap<IItem>(item, false))
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{
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if (wrapped != null)
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Write(wrapped, ref cancel);
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}
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}
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}
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catch (System.Exception e)
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{
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Logger.Instance.Error(this, "OnWrite: {0}", e);
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}
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}
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public event CancellableMailItemEventHandler ItemSend;
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private void OnItemSend(object item, ref bool cancel)
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{
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try
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{
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if (ItemSend != null && item != null)
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{
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using (IMailItem wrapped = Mapping.WrapOrDefault<IMailItem>(item, false))
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{
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if (wrapped != null)
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ItemSend(wrapped, ref cancel);
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}
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}
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}
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catch (System.Exception e)
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{
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Logger.Instance.Error(this, "OnItemSend: {0}", e);
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}
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}
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#endregion
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#region Implementation
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public MailEvents(Application app)
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{
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app.ItemLoad += OnItemLoad;
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app.ItemSend += OnItemSend;
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}
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void OnItemLoad(object item)
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{
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ItemEvents_10_Event hasEvents = item as ItemEvents_10_Event;
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if (hasEvents != null)
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{
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new MailEventHooker(hasEvents, this);
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}
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}
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private class MailEventHooker
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{
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private readonly ItemEvents_10_Event item;
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private readonly MailEvents events;
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public MailEventHooker(ItemEvents_10_Event item, MailEvents events)
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{
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this.item = item;
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this.events = events;
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HookEvents(true);
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}
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private void HookEvents(bool add)
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{
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ItemEvents_10_Event events = this.item;
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if (add)
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{
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events.BeforeDelete += HandleBeforeDelete;
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events.Forward += HandleForward;
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events.Read += HandleRead;
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events.Reply += HandleReply;
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events.ReplyAll += HandleReplyAll;
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events.Unload += HandleUnload;
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events.Write += HandleWrite;
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}
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else
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{
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events.BeforeDelete -= HandleBeforeDelete;
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events.Forward -= HandleForward;
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events.Read -= HandleRead;
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events.Reply -= HandleReply;
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events.ReplyAll -= HandleReplyAll;
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events.Unload -= HandleUnload;
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events.Write -= HandleWrite;
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}
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}
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private void HandleBeforeDelete(object item, ref bool cancel)
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{
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events.OnBeforeDelete(item, ref cancel);
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}
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private void HandleForward(object response, ref bool cancel)
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{
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events.OnForward(item as MailItem, response as MailItem);
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}
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private void HandleRead()
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{
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events.OnRead(item as MailItem);
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}
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private void HandleReply(object response, ref bool cancel)
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{
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events.OnReply(item as MailItem, response as MailItem);
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}
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private void HandleReplyAll(object response, ref bool cancel)
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{
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events.OnReplyAll(item as MailItem, response as MailItem);
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}
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private void HandleUnload()
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{
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// All events must be unhooked on unload, otherwise a resource leak is created.
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HookEvents(false);
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}
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private void HandleWrite(ref bool cancel)
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{
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events.OnWrite(item, ref cancel);
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}
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}
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#endregion
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}
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}
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