Burak Kaan Köse
667 lines
23 KiB
C#
667 lines
23 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using CommunityToolkit.Mvvm.Collections;
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Messaging;
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using MoreLinq.Extensions;
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using Serilog;
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using Wino.Core.Domain.Entities.Mail;
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using Wino.Core.Domain.Enums;
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using Wino.Core.Domain.Interfaces;
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using Wino.Mail.ViewModels.Data;
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using Wino.Messaging.Client.Mails;
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namespace Wino.Mail.ViewModels.Collections;
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public class WinoMailCollection : ObservableRecipient, IRecipient<SelectedItemsChangedMessage>
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{
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// We cache each mail copy id for faster access on updates.
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// If the item provider here for update or removal doesn't exist here
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// we can ignore the operation.
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public HashSet<Guid> MailCopyIdHashSet = [];
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public event EventHandler<MailItemViewModel> MailItemRemoved;
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public event EventHandler ItemSelectionChanged;
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private ListItemComparer listComparer = new();
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private readonly ObservableGroupedCollection<object, IMailListItem> _mailItemSource = new ObservableGroupedCollection<object, IMailListItem>();
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public ReadOnlyObservableGroupedCollection<object, IMailListItem> MailItems { get; }
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/// <summary>
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/// Property that defines how the item sorting should be done in the collection.
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/// </summary>
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public SortingOptionType SortingType { get; set; }
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/// <summary>
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/// Gets or sets the grouping type for emails.
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/// Note: WinoMailCollection groups automatically on the UI, so this just affects the grouping key logic.
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/// </summary>
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public EmailGroupingType GroupingType
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{
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get => SortingType == SortingOptionType.ReceiveDate ? EmailGroupingType.ByDate : EmailGroupingType.ByFromName;
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set => SortingType = value == EmailGroupingType.ByDate ? SortingOptionType.ReceiveDate : SortingOptionType.Sender;
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}
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/// <summary>
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/// Automatically deletes single mail items after the delete operation or thread->single transition.
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/// This is useful when reply draft is discarded in the thread. Only enabled for Draft folder for now.
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/// </summary>
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public bool PruneSingleNonDraftItems { get; set; }
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public int Count => _mailItemSource.Count;
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public bool IsAllSelected
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{
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get
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{
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return AllItemsCount == SelectedItemsCount;
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}
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}
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public IDispatcher CoreDispatcher { get; set; }
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public WinoMailCollection()
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{
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MailItems = new ReadOnlyObservableGroupedCollection<object, IMailListItem>(_mailItemSource);
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Messenger.Register<SelectedItemsChangedMessage>(this);
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}
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public async Task ClearAsync()
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{
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await ExecuteUIThread(() =>
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{
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_mailItemSource.Clear();
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MailCopyIdHashSet.Clear();
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});
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}
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private object GetGroupingKey(IMailListItem mailItem)
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{
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if (SortingType == SortingOptionType.ReceiveDate)
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return mailItem.CreationDate.ToLocalTime().Date;
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else
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return mailItem.FromName;
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}
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private void UpdateUniqueIdHashes(IMailHashContainer itemContainer, bool isAdd)
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{
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foreach (var item in itemContainer.GetContainingIds())
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{
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if (isAdd)
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{
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MailCopyIdHashSet.Add(item);
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}
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else
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{
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MailCopyIdHashSet.Remove(item);
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}
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}
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}
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private async Task InsertItemInternalAsync(object groupKey, IMailListItem mailItem)
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{
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UpdateUniqueIdHashes(mailItem, true);
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await ExecuteUIThread(() =>
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{
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_mailItemSource.InsertItem(groupKey, listComparer, mailItem, listComparer);
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});
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}
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private async Task RemoveItemInternalAsync(ObservableGroup<object, IMailListItem> group, IMailListItem mailItem)
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{
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UpdateUniqueIdHashes(mailItem, false);
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if (mailItem is MailItemViewModel singleMailItem)
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{
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MailItemRemoved?.Invoke(this, singleMailItem);
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}
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else if (mailItem is ThreadMailItemViewModel threadViewModel)
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{
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foreach (var threadMailItem in threadViewModel.ThreadEmails)
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{
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MailItemRemoved?.Invoke(this, threadMailItem);
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}
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}
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await ExecuteUIThread(() =>
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{
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group.Remove(mailItem);
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if (group.Count == 0)
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{
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_mailItemSource.RemoveGroup(group.Key);
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}
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});
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}
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private async Task HandleThreadingAsync(ObservableGroup<object, IMailListItem> group, IMailListItem item, MailCopy addedItem)
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{
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if (item is ThreadMailItemViewModel threadViewModel)
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{
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await HandleExistingThreadAsync(group, threadViewModel, addedItem);
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}
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else if (item is MailItemViewModel mailViewModel)
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{
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await HandleNewThreadAsync(group, mailViewModel, addedItem);
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}
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}
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private async Task HandleExistingThreadAsync(ObservableGroup<object, IMailListItem> group, ThreadMailItemViewModel threadViewModel, MailCopy addedItem)
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{
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var existingGroupKey = GetGroupingKey(threadViewModel);
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await ExecuteUIThread(() =>
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{
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var newMailItem = new MailItemViewModel(addedItem);
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threadViewModel.AddEmail(newMailItem);
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});
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var newGroupKey = GetGroupingKey(threadViewModel);
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if (!existingGroupKey.Equals(newGroupKey))
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{
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await MoveThreadToNewGroupAsync(group, threadViewModel, newGroupKey);
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}
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else
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{
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await ExecuteUIThread(() => { threadViewModel.NotifyPropertyChanges(); });
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}
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UpdateUniqueIdHashes(new MailItemViewModel(addedItem), true);
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}
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private async Task HandleNewThreadAsync(ObservableGroup<object, IMailListItem> group, MailItemViewModel item, MailCopy addedItem)
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{
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if (item.MailCopy.UniqueId == addedItem.UniqueId)
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{
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await UpdateExistingItemAsync(item, addedItem);
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}
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else
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{
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await CreateNewThreadAsync(group, item, addedItem);
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}
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}
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private async Task MoveThreadToNewGroupAsync(ObservableGroup<object, IMailListItem> currentGroup, ThreadMailItemViewModel threadViewModel, object newGroupKey)
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{
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await RemoveItemInternalAsync(currentGroup, threadViewModel);
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await InsertItemInternalAsync(newGroupKey, threadViewModel);
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}
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private async Task CreateNewThreadAsync(ObservableGroup<object, IMailListItem> group, MailItemViewModel item, MailCopy addedItem)
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{
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var threadViewModel = new ThreadMailItemViewModel(item.MailCopy.ThreadId);
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await ExecuteUIThread(() =>
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{
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threadViewModel.AddEmail(item);
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threadViewModel.AddEmail(new MailItemViewModel(addedItem));
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});
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var newGroupKey = GetGroupingKey(threadViewModel);
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await RemoveItemInternalAsync(group, item);
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await InsertItemInternalAsync(newGroupKey, threadViewModel);
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}
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public async Task AddAsync(MailCopy addedItem)
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{
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foreach (var group in _mailItemSource)
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{
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foreach (var item in group)
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{
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// Compare ThreadIds - if they match and both have ThreadIds, thread them together
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bool shouldThread = !string.IsNullOrEmpty(addedItem.ThreadId) &&
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item is MailItemViewModel mailItem &&
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!string.IsNullOrEmpty(mailItem.MailCopy.ThreadId) &&
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string.Equals(addedItem.ThreadId, mailItem.MailCopy.ThreadId, StringComparison.OrdinalIgnoreCase);
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if (!shouldThread && item is ThreadMailItemViewModel threadViewModel)
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{
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// Check if any email in the thread has matching ThreadId
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shouldThread = !string.IsNullOrEmpty(addedItem.ThreadId) &&
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threadViewModel.ThreadEmails.Any(e =>
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!string.IsNullOrEmpty(e.MailCopy.ThreadId) &&
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string.Equals(addedItem.ThreadId, e.MailCopy.ThreadId, StringComparison.OrdinalIgnoreCase));
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}
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if (shouldThread)
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{
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await HandleThreadingAsync(group, item, addedItem);
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return;
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}
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else if (item is MailItemViewModel itemViewModel && itemViewModel.MailCopy.UniqueId == addedItem.UniqueId)
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{
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await UpdateExistingItemAsync(itemViewModel, addedItem);
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return;
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}
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}
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}
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await AddNewItemAsync(addedItem);
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}
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private async Task AddNewItemAsync(MailCopy addedItem)
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{
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var newMailItem = new MailItemViewModel(addedItem);
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var groupKey = GetGroupingKey(newMailItem);
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await InsertItemInternalAsync(groupKey, newMailItem);
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}
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private async Task UpdateExistingItemAsync(MailItemViewModel existingItem, MailCopy updatedItem)
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{
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UpdateUniqueIdHashes(existingItem, false);
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UpdateUniqueIdHashes(new MailItemViewModel(updatedItem), true);
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await ExecuteUIThread(() => { existingItem.MailCopy = updatedItem; });
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}
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/// <summary>
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/// Adds multiple emails to the collection.
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/// </summary>
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public async Task AddRangeAsync(IEnumerable<IMailListItem> items, bool clearIdCache)
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{
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if (clearIdCache)
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{
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MailCopyIdHashSet.Clear();
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}
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var groupedByName = items
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.GroupBy(GetGroupingKey)
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.Select(a => new ObservableGroup<object, IMailListItem>(a.Key, a));
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await ExecuteUIThread(() =>
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{
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foreach (var group in groupedByName)
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{
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// Store all mail copy ids for faster access.
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foreach (var item in group)
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{
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UpdateUniqueIdHashes(item, true);
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}
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var existingGroup = _mailItemSource.FirstGroupByKeyOrDefault(group.Key);
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if (existingGroup == null)
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{
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_mailItemSource.AddGroup(group.Key, group);
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}
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else
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{
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foreach (var item in group)
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{
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existingGroup.Add(item);
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}
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}
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}
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});
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}
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public MailItemContainer GetMailItemContainer(Guid uniqueMailId)
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{
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var groupCount = _mailItemSource.Count;
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for (int i = 0; i < groupCount; i++)
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{
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var group = _mailItemSource[i];
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for (int k = 0; k < group.Count; k++)
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{
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var item = group[k];
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if (item is MailItemViewModel singleMailItemViewModel && singleMailItemViewModel.MailCopy.UniqueId == uniqueMailId)
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return new MailItemContainer(singleMailItemViewModel);
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else if (item is ThreadMailItemViewModel threadMailItemViewModel && threadMailItemViewModel.HasUniqueId(uniqueMailId))
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{
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var singleItemViewModel = threadMailItemViewModel.ThreadEmails.FirstOrDefault(e => e.MailCopy.UniqueId == uniqueMailId);
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return new MailItemContainer(singleItemViewModel, threadMailItemViewModel);
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}
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}
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}
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return null;
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}
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/// <summary>
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/// Updates thumbnails for all mail items with the specified address.
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/// </summary>
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public Task UpdateThumbnailsForAddressAsync(string address)
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{
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if (CoreDispatcher == null) return Task.CompletedTask;
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return CoreDispatcher.ExecuteOnUIThread(() =>
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{
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foreach (var group in _mailItemSource)
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{
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foreach (var item in group)
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{
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if (item is MailItemViewModel mailItemViewModel && mailItemViewModel.MailCopy.FromAddress?.Equals(address, StringComparison.OrdinalIgnoreCase) == true)
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{
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mailItemViewModel.ThumbnailUpdatedEvent = !mailItemViewModel.ThumbnailUpdatedEvent;
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}
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else if (item is ThreadMailItemViewModel threadViewModel)
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{
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foreach (var threadMailItem in threadViewModel.ThreadEmails)
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{
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if (threadMailItem.MailCopy.FromAddress?.Equals(address, StringComparison.OrdinalIgnoreCase) == true)
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{
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threadMailItem.ThumbnailUpdatedEvent = !threadMailItem.ThumbnailUpdatedEvent;
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}
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}
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}
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}
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}
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});
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}
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/// <summary>
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/// Fins the item container that updated mail copy belongs to and updates it.
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/// </summary>
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/// <param name="updatedMailCopy">Updated mail copy.</param>
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/// <returns></returns>
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public Task UpdateMailCopy(MailCopy updatedMailCopy)
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{
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// This item doesn't exist in the list.
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if (!MailCopyIdHashSet.Contains(updatedMailCopy.UniqueId)) return Task.CompletedTask;
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return ExecuteUIThread(() =>
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{
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var itemContainer = GetMailItemContainer(updatedMailCopy.UniqueId);
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if (itemContainer == null) return;
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if (itemContainer.ItemViewModel != null)
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{
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UpdateUniqueIdHashes(itemContainer.ItemViewModel, false);
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}
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if (itemContainer.ItemViewModel != null)
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{
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itemContainer.ItemViewModel.MailCopy = updatedMailCopy;
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}
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UpdateUniqueIdHashes(new MailItemViewModel(updatedMailCopy), true);
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// Call thread notifications if possible.
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itemContainer.ThreadViewModel?.NotifyPropertyChanges();
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});
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}
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public MailItemViewModel GetFirst() => AllItems.ElementAtOrDefault(0);
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public MailItemViewModel GetNextItem(MailCopy mailCopy)
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{
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try
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{
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var groupCount = _mailItemSource.Count;
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for (int i = 0; i < groupCount; i++)
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{
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var group = _mailItemSource[i];
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for (int k = 0; k < group.Count; k++)
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{
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var item = group[k];
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if (item is MailItemViewModel singleMailItemViewModel && singleMailItemViewModel.MailCopy.UniqueId == mailCopy.UniqueId)
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{
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if (k + 1 < group.Count)
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{
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return group[k + 1] as MailItemViewModel;
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}
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else if (i + 1 < groupCount)
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{
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return _mailItemSource[i + 1][0] as MailItemViewModel;
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}
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else
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{
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return null;
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}
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}
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else if (item is ThreadMailItemViewModel threadMailItemViewModel && threadMailItemViewModel.HasUniqueId(mailCopy.UniqueId))
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{
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var singleItemViewModel = threadMailItemViewModel.ThreadEmails.FirstOrDefault(e => e.MailCopy.UniqueId == mailCopy.UniqueId);
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if (singleItemViewModel == null) return null;
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var singleItemIndex = threadMailItemViewModel.ThreadEmails.ToList().IndexOf(singleItemViewModel);
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if (singleItemIndex + 1 < threadMailItemViewModel.ThreadEmails.Count)
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{
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return threadMailItemViewModel.ThreadEmails[singleItemIndex + 1];
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}
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else if (i + 1 < groupCount)
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{
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return _mailItemSource[i + 1][0] as MailItemViewModel;
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}
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else
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{
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return null;
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}
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}
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}
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}
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return null;
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}
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catch (Exception ex)
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{
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Log.Warning(ex, "Failed to find the next item to select.");
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}
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return null;
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}
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public async Task RemoveAsync(MailCopy removeItem)
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{
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// This item doesn't exist in the list.
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if (!MailCopyIdHashSet.Contains(removeItem.UniqueId)) return;
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// Check all items for whether this item should be threaded with them.
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bool shouldExit = false;
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var groupCount = _mailItemSource.Count;
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for (int i = 0; i < groupCount; i++)
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{
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if (shouldExit) break;
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var group = _mailItemSource[i];
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for (int k = 0; k < group.Count; k++)
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{
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var item = group[k];
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if (item is ThreadMailItemViewModel threadMailItemViewModel && threadMailItemViewModel.HasUniqueId(removeItem.UniqueId))
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{
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var removalItem = threadMailItemViewModel.ThreadEmails.FirstOrDefault(e => e.MailCopy.UniqueId == removeItem.UniqueId);
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if (removalItem == null) return;
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// Threads' Id is equal to the last item they hold.
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// We can't do Id check here because that'd remove the whole thread.
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/* Remove item from the thread.
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* If thread had 1 item inside:
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* -> Remove the thread and insert item as single item.
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* If thread had 0 item inside:
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* -> Remove the thread.
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*/
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var oldGroupKey = GetGroupingKey(threadMailItemViewModel);
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await ExecuteUIThread(() => { threadMailItemViewModel.RemoveEmail(removalItem); });
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if (threadMailItemViewModel.EmailCount == 1)
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{
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// Convert to single item.
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var singleViewModel = threadMailItemViewModel.ThreadEmails.First();
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var groupKey = GetGroupingKey(singleViewModel);
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await RemoveItemInternalAsync(group, threadMailItemViewModel);
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await InsertItemInternalAsync(groupKey, singleViewModel);
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// If thread->single conversion is being done, we should ignore it for non-draft items.
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// eg. Deleting a reply message from draft folder. Single non-draft item should not be re-added.
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if (PruneSingleNonDraftItems && !singleViewModel.IsDraft)
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{
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// This item should not be here anymore.
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// It's basically a reply mail in Draft folder.
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var newGroup = _mailItemSource.FirstGroupByKeyOrDefault(groupKey);
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if (newGroup != null)
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{
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await RemoveItemInternalAsync(newGroup, singleViewModel);
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}
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}
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}
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else if (threadMailItemViewModel.EmailCount == 0)
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{
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await RemoveItemInternalAsync(group, threadMailItemViewModel);
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}
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else
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{
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// Item inside the thread is removed - update hash
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UpdateUniqueIdHashes(removalItem, false);
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}
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shouldExit = true;
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break;
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}
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else if (item is MailItemViewModel mailItemViewModel && mailItemViewModel.MailCopy.UniqueId == removeItem.UniqueId)
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{
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await RemoveItemInternalAsync(group, item);
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shouldExit = true;
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break;
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}
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}
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}
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await NotifySelectionChangesAsync();
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}
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private IEnumerable<MailItemViewModel> AllItems
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{
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get
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|
{
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foreach (var group in _mailItemSource)
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{
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foreach (var item in group)
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{
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if (item is not MailItemViewModel mailItemViewModel) throw new Exception("Item is not MailItemViewModel in AllItems");
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if (item is ThreadMailItemViewModel threadMail)
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{
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|
foreach (var singleItem in threadMail.ThreadEmails)
|
|
{
|
|
yield return singleItem;
|
|
}
|
|
}
|
|
|
|
yield return mailItemViewModel;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public IEnumerable<MailItemViewModel> SelectedItems => AllItems.Where(a => a.IsSelected);
|
|
public int SelectedItemsCount => AllItems.Count(a => a.IsSelected);
|
|
public int AllItemsCount => AllItems.Count();
|
|
public bool IsAllItemsSelected => AllItems.Any() && AllItems.All(a => a.IsSelected);
|
|
public bool HasSingleItemSelected => SelectedItemsCount == 1;
|
|
|
|
public async Task ExecuteWithoutRaiseSelectionChangedAsync(Action<MailItemViewModel> action)
|
|
{
|
|
try
|
|
{
|
|
// Do not listen to individual selection changes while we are doing bulk selection.
|
|
Messenger.Unregister<SelectedItemsChangedMessage>(this);
|
|
|
|
await ExecuteUIThread(() =>
|
|
{
|
|
foreach (var item in AllItems)
|
|
{
|
|
action(item);
|
|
}
|
|
});
|
|
}
|
|
catch (Exception)
|
|
{
|
|
}
|
|
finally
|
|
{
|
|
Messenger.Register<SelectedItemsChangedMessage>(this);
|
|
Messenger.Send(new SelectedItemsChangedMessage());
|
|
|
|
await NotifySelectionChangesAsync();
|
|
}
|
|
}
|
|
|
|
public Task ToggleSelectAllAsync()
|
|
{
|
|
if (IsAllItemsSelected)
|
|
{
|
|
return UnselectAllAsync();
|
|
}
|
|
else
|
|
{
|
|
return SelectAllAsync();
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the index of an item in the flat Items collection.
|
|
/// Note: WinoMailCollection doesn't have a flat Items collection like GroupedEmailCollection.
|
|
/// This returns -1 as it's not applicable to the grouped structure.
|
|
/// </summary>
|
|
public int IndexOf(object item)
|
|
{
|
|
// WinoMailCollection uses grouped structure, so we need to search through groups
|
|
int currentIndex = 0;
|
|
|
|
foreach (var group in _mailItemSource)
|
|
{
|
|
foreach (var groupItem in group)
|
|
{
|
|
if (ReferenceEquals(groupItem, item))
|
|
{
|
|
return currentIndex;
|
|
}
|
|
currentIndex++;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
public Task SelectAllAsync() => ExecuteWithoutRaiseSelectionChangedAsync(a => a.IsSelected = true);
|
|
public Task UnselectAllAsync() => ExecuteWithoutRaiseSelectionChangedAsync(a => a.IsSelected = false);
|
|
|
|
private async Task ExecuteUIThread(Action action) => await CoreDispatcher?.ExecuteOnUIThread(action);
|
|
|
|
public void Receive(SelectedItemsChangedMessage message) => _ = NotifySelectionChangesAsync();
|
|
|
|
private async Task NotifySelectionChangesAsync()
|
|
{
|
|
await ExecuteUIThread(() =>
|
|
{
|
|
OnPropertyChanged(nameof(IsAllItemsSelected));
|
|
OnPropertyChanged(nameof(SelectedItemsCount));
|
|
OnPropertyChanged(nameof(HasSingleItemSelected));
|
|
|
|
ItemSelectionChanged?.Invoke(this, null);
|
|
});
|
|
}
|
|
}
|