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Aleh Khantsevich
@@ -13,173 +13,172 @@ using Wino.Core.Domain.Models.MailItem;
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using Wino.Services.Extensions;
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using IMailService = Wino.Core.Domain.Interfaces.IMailService;
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namespace Wino.Core.Synchronizers.ImapSync
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namespace Wino.Core.Synchronizers.ImapSync;
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public abstract class ImapSynchronizationStrategyBase : IImapSynchronizerStrategy
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{
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public abstract class ImapSynchronizationStrategyBase : IImapSynchronizerStrategy
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// Minimum summary items to Fetch for mail synchronization from IMAP.
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protected readonly MessageSummaryItems MailSynchronizationFlags =
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MessageSummaryItems.Flags |
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MessageSummaryItems.UniqueId |
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MessageSummaryItems.ThreadId |
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MessageSummaryItems.EmailId |
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MessageSummaryItems.Headers |
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MessageSummaryItems.PreviewText |
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MessageSummaryItems.GMailThreadId |
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MessageSummaryItems.References |
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MessageSummaryItems.ModSeq;
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protected IFolderService FolderService { get; }
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protected IMailService MailService { get; }
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protected MailItemFolder Folder { get; set; }
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protected ImapSynchronizationStrategyBase(IFolderService folderService, IMailService mailService)
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{
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// Minimum summary items to Fetch for mail synchronization from IMAP.
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protected readonly MessageSummaryItems MailSynchronizationFlags =
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MessageSummaryItems.Flags |
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MessageSummaryItems.UniqueId |
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MessageSummaryItems.ThreadId |
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MessageSummaryItems.EmailId |
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MessageSummaryItems.Headers |
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MessageSummaryItems.PreviewText |
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MessageSummaryItems.GMailThreadId |
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MessageSummaryItems.References |
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MessageSummaryItems.ModSeq;
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FolderService = folderService;
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MailService = mailService;
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}
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protected IFolderService FolderService { get; }
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protected IMailService MailService { get; }
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protected MailItemFolder Folder { get; set; }
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public abstract Task<List<string>> HandleSynchronizationAsync(IImapClient client, MailItemFolder folder, IImapSynchronizer synchronizer, CancellationToken cancellationToken = default);
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internal abstract Task<IList<UniqueId>> GetChangedUidsAsync(IImapClient client, IMailFolder remoteFolder, IImapSynchronizer synchronizer, CancellationToken cancellationToken = default);
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protected ImapSynchronizationStrategyBase(IFolderService folderService, IMailService mailService)
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protected async Task<List<string>> HandleChangedUIdsAsync(IImapSynchronizer synchronizer, IMailFolder remoteFolder, IList<UniqueId> changedUids, CancellationToken cancellationToken)
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{
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List<string> downloadedMessageIds = new();
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var existingMails = await MailService.GetExistingMailsAsync(Folder.Id, changedUids).ConfigureAwait(false);
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var existingMailUids = existingMails.Select(m => MailkitClientExtensions.ResolveUidStruct(m.Id)).ToArray();
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// These are the non-existing mails. They will be downloaded + processed.
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var newMessageIds = changedUids.Except(existingMailUids).ToList();
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var deletedMessageIds = existingMailUids.Except(changedUids).ToList();
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// Fetch minimum data for the existing mails in one query.
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var existingFlagData = await remoteFolder.FetchAsync(existingMailUids, MessageSummaryItems.Flags | MessageSummaryItems.UniqueId).ConfigureAwait(false);
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foreach (var update in existingFlagData)
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{
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FolderService = folderService;
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MailService = mailService;
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}
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public abstract Task<List<string>> HandleSynchronizationAsync(IImapClient client, MailItemFolder folder, IImapSynchronizer synchronizer, CancellationToken cancellationToken = default);
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internal abstract Task<IList<UniqueId>> GetChangedUidsAsync(IImapClient client, IMailFolder remoteFolder, IImapSynchronizer synchronizer, CancellationToken cancellationToken = default);
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protected async Task<List<string>> HandleChangedUIdsAsync(IImapSynchronizer synchronizer, IMailFolder remoteFolder, IList<UniqueId> changedUids, CancellationToken cancellationToken)
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{
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List<string> downloadedMessageIds = new();
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var existingMails = await MailService.GetExistingMailsAsync(Folder.Id, changedUids).ConfigureAwait(false);
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var existingMailUids = existingMails.Select(m => MailkitClientExtensions.ResolveUidStruct(m.Id)).ToArray();
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// These are the non-existing mails. They will be downloaded + processed.
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var newMessageIds = changedUids.Except(existingMailUids).ToList();
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var deletedMessageIds = existingMailUids.Except(changedUids).ToList();
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// Fetch minimum data for the existing mails in one query.
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var existingFlagData = await remoteFolder.FetchAsync(existingMailUids, MessageSummaryItems.Flags | MessageSummaryItems.UniqueId).ConfigureAwait(false);
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foreach (var update in existingFlagData)
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if (update.UniqueId == null)
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{
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if (update.UniqueId == null)
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{
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Log.Warning($"Couldn't fetch UniqueId for the mail. FetchAsync failed.");
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continue;
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}
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if (update.Flags == null)
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{
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Log.Warning($"Couldn't fetch flags for the mail with UID {update.UniqueId.Id}. FetchAsync failed.");
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continue;
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}
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var existingMail = existingMails.FirstOrDefault(m => MailkitClientExtensions.ResolveUidStruct(m.Id).Id == update.UniqueId.Id);
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if (existingMail == null)
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{
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Log.Warning($"Couldn't find the mail with UID {update.UniqueId.Id} in the local database. Flag update is ignored.");
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continue;
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}
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await HandleMessageFlagsChangeAsync(existingMail, update.Flags.Value).ConfigureAwait(false);
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Log.Warning($"Couldn't fetch UniqueId for the mail. FetchAsync failed.");
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continue;
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}
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// Fetch the new mails in batch.
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var batchedMessageIds = newMessageIds.Batch(50);
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foreach (var group in batchedMessageIds)
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if (update.Flags == null)
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{
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var summaries = await remoteFolder.FetchAsync(group, MailSynchronizationFlags, cancellationToken).ConfigureAwait(false);
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Log.Warning($"Couldn't fetch flags for the mail with UID {update.UniqueId.Id}. FetchAsync failed.");
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continue;
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}
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foreach (var summary in summaries)
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var existingMail = existingMails.FirstOrDefault(m => MailkitClientExtensions.ResolveUidStruct(m.Id).Id == update.UniqueId.Id);
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if (existingMail == null)
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{
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Log.Warning($"Couldn't find the mail with UID {update.UniqueId.Id} in the local database. Flag update is ignored.");
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continue;
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}
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await HandleMessageFlagsChangeAsync(existingMail, update.Flags.Value).ConfigureAwait(false);
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}
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// Fetch the new mails in batch.
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var batchedMessageIds = newMessageIds.Batch(50);
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foreach (var group in batchedMessageIds)
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{
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var summaries = await remoteFolder.FetchAsync(group, MailSynchronizationFlags, cancellationToken).ConfigureAwait(false);
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foreach (var summary in summaries)
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{
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var mimeMessage = await remoteFolder.GetMessageAsync(summary.UniqueId, cancellationToken).ConfigureAwait(false);
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var creationPackage = new ImapMessageCreationPackage(summary, mimeMessage);
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var mailPackages = await synchronizer.CreateNewMailPackagesAsync(creationPackage, Folder, cancellationToken).ConfigureAwait(false);
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if (mailPackages != null)
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{
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var mimeMessage = await remoteFolder.GetMessageAsync(summary.UniqueId, cancellationToken).ConfigureAwait(false);
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var creationPackage = new ImapMessageCreationPackage(summary, mimeMessage);
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var mailPackages = await synchronizer.CreateNewMailPackagesAsync(creationPackage, Folder, cancellationToken).ConfigureAwait(false);
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if (mailPackages != null)
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foreach (var package in mailPackages)
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{
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foreach (var package in mailPackages)
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{
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// Local draft is mapped. We don't need to create a new mail copy.
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if (package == null) continue;
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// Local draft is mapped. We don't need to create a new mail copy.
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if (package == null) continue;
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bool isCreatedNew = await MailService.CreateMailAsync(Folder.MailAccountId, package).ConfigureAwait(false);
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bool isCreatedNew = await MailService.CreateMailAsync(Folder.MailAccountId, package).ConfigureAwait(false);
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// This is upsert. We are not interested in updated mails.
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if (isCreatedNew) downloadedMessageIds.Add(package.Copy.Id);
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}
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// This is upsert. We are not interested in updated mails.
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if (isCreatedNew) downloadedMessageIds.Add(package.Copy.Id);
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}
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}
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}
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return downloadedMessageIds;
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}
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protected async Task HandleMessageFlagsChangeAsync(UniqueId? uniqueId, MessageFlags flags)
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return downloadedMessageIds;
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}
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protected async Task HandleMessageFlagsChangeAsync(UniqueId? uniqueId, MessageFlags flags)
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{
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if (Folder == null) return;
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if (uniqueId == null) return;
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var localMailCopyId = MailkitClientExtensions.CreateUid(Folder.Id, uniqueId.Value.Id);
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var isFlagged = MailkitClientExtensions.GetIsFlagged(flags);
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var isRead = MailkitClientExtensions.GetIsRead(flags);
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await MailService.ChangeReadStatusAsync(localMailCopyId, isRead).ConfigureAwait(false);
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await MailService.ChangeFlagStatusAsync(localMailCopyId, isFlagged).ConfigureAwait(false);
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}
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protected async Task HandleMessageFlagsChangeAsync(MailCopy mailCopy, MessageFlags flags)
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{
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if (mailCopy == null) return;
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var isFlagged = MailkitClientExtensions.GetIsFlagged(flags);
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var isRead = MailkitClientExtensions.GetIsRead(flags);
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if (isFlagged != mailCopy.IsFlagged)
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{
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if (Folder == null) return;
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if (uniqueId == null) return;
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var localMailCopyId = MailkitClientExtensions.CreateUid(Folder.Id, uniqueId.Value.Id);
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var isFlagged = MailkitClientExtensions.GetIsFlagged(flags);
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var isRead = MailkitClientExtensions.GetIsRead(flags);
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await MailService.ChangeReadStatusAsync(localMailCopyId, isRead).ConfigureAwait(false);
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await MailService.ChangeFlagStatusAsync(localMailCopyId, isFlagged).ConfigureAwait(false);
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await MailService.ChangeFlagStatusAsync(mailCopy.Id, isFlagged).ConfigureAwait(false);
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}
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protected async Task HandleMessageFlagsChangeAsync(MailCopy mailCopy, MessageFlags flags)
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if (isRead != mailCopy.IsRead)
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{
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if (mailCopy == null) return;
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var isFlagged = MailkitClientExtensions.GetIsFlagged(flags);
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var isRead = MailkitClientExtensions.GetIsRead(flags);
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if (isFlagged != mailCopy.IsFlagged)
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{
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await MailService.ChangeFlagStatusAsync(mailCopy.Id, isFlagged).ConfigureAwait(false);
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}
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if (isRead != mailCopy.IsRead)
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{
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await MailService.ChangeReadStatusAsync(mailCopy.Id, isRead).ConfigureAwait(false);
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}
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await MailService.ChangeReadStatusAsync(mailCopy.Id, isRead).ConfigureAwait(false);
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}
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}
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protected async Task HandleMessageDeletedAsync(IList<UniqueId> uniqueIds)
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protected async Task HandleMessageDeletedAsync(IList<UniqueId> uniqueIds)
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{
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if (Folder == null) return;
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if (uniqueIds == null || uniqueIds.Count == 0) return;
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foreach (var uniqueId in uniqueIds)
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{
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if (Folder == null) return;
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if (uniqueIds == null || uniqueIds.Count == 0) return;
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if (uniqueId == null) continue;
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var localMailCopyId = MailkitClientExtensions.CreateUid(Folder.Id, uniqueId.Id);
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foreach (var uniqueId in uniqueIds)
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{
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if (uniqueId == null) continue;
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var localMailCopyId = MailkitClientExtensions.CreateUid(Folder.Id, uniqueId.Id);
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await MailService.DeleteMailAsync(Folder.MailAccountId, localMailCopyId).ConfigureAwait(false);
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}
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await MailService.DeleteMailAsync(Folder.MailAccountId, localMailCopyId).ConfigureAwait(false);
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}
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}
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protected void OnMessagesVanished(object sender, MessagesVanishedEventArgs args)
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=> HandleMessageDeletedAsync(args.UniqueIds).ConfigureAwait(false);
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protected void OnMessagesVanished(object sender, MessagesVanishedEventArgs args)
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=> HandleMessageDeletedAsync(args.UniqueIds).ConfigureAwait(false);
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protected void OnMessageFlagsChanged(object sender, MessageFlagsChangedEventArgs args)
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=> HandleMessageFlagsChangeAsync(args.UniqueId, args.Flags).ConfigureAwait(false);
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protected void OnMessageFlagsChanged(object sender, MessageFlagsChangedEventArgs args)
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=> HandleMessageFlagsChangeAsync(args.UniqueId, args.Flags).ConfigureAwait(false);
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protected async Task ManageUUIdBasedDeletedMessagesAsync(MailItemFolder localFolder, IMailFolder remoteFolder, CancellationToken cancellationToken = default)
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protected async Task ManageUUIdBasedDeletedMessagesAsync(MailItemFolder localFolder, IMailFolder remoteFolder, CancellationToken cancellationToken = default)
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{
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var allUids = (await FolderService.GetKnownUidsForFolderAsync(localFolder.Id)).Select(a => new UniqueId(a)).ToList();
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if (allUids.Count > 0)
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{
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var allUids = (await FolderService.GetKnownUidsForFolderAsync(localFolder.Id)).Select(a => new UniqueId(a)).ToList();
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var remoteAllUids = await remoteFolder.SearchAsync(SearchQuery.All, cancellationToken);
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var deletedUids = allUids.Except(remoteAllUids).ToList();
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if (allUids.Count > 0)
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{
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var remoteAllUids = await remoteFolder.SearchAsync(SearchQuery.All, cancellationToken);
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var deletedUids = allUids.Except(remoteAllUids).ToList();
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await HandleMessageDeletedAsync(deletedUids).ConfigureAwait(false);
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}
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await HandleMessageDeletedAsync(deletedUids).ConfigureAwait(false);
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}
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}
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}
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