AppStd/DigitalData.MessagingService
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Add support for optional email attachments fetching

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Introduced a `withAttachments` parameter to the `FetchEmailsAsync` method in `IImapEmailService` and related layers, allowing callers to include or exclude attachment data when fetching emails. Updated `FetchEmailsQuery` and `FetchEmailsQueryHandler` to propagate this parameter.

Refactored `LimilabsImapEmailService` to conditionally process attachments and inline visuals based on the `withAttachments` flag, improving performance when attachments are not required. Replaced `Flag.Unseen` with `Expression.HasFlag(Flag.Unseen)` for better criteria handling. Cleaned up attachment-processing logic for improved readability and maintainability.
This commit is contained in:
tekh
2026-08-10 11:54:35 +02:00
parent 8e2e9af451
commit 763ba67d34
3 changed files with 34 additions and 21 deletions
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46
src/infrastructure/DigitalData.MessagingService.Infrastructure/Services/LimilabsImapEmailService.cs
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@@ -27,6 +27,7 @@ public class LimilabsImapEmailService(
public async Task<IEnumerable<ReceivedEmailContext>> FetchEmailsAsync(
EmailAccountDto account,
MailSearchFilter filter,
bool withAttachments = false,
CancellationToken cancellationToken = default)
{
using var imap = new Imap();
@@ -38,7 +39,7 @@ public class LimilabsImapEmailService(
List<ICriterion> criterions = [];
if (filter.UnseenOnly)
criterions.Add((ICriterion)Flag.Unseen);
criterions.Add(Expression.HasFlag(Flag.Unseen));
if (filter.SubjectContains is not null)
criterions.Add(Expression.Subject(filter.SubjectContains));
@@ -103,7 +104,7 @@ public class LimilabsImapEmailService(
if (filter.HasAttachments && mail.Attachments.Count == 0 && mail.Visuals.Count == 0)
continue;
results.Add(MapToContext(uid, mail, flags));
results.Add(MapToContext(uid, mail, flags, withAttachments));
}
catch (Exception ex)
{
@@ -179,32 +180,35 @@ public class LimilabsImapEmailService(
await imap.SelectAsync(folder);
}
private static ReceivedEmailContext MapToContext(long uid, IMail mail, List<Flag> flags)
private static ReceivedEmailContext MapToContext(long uid, IMail mail, List<Flag> flags, bool withAttachments = false)
{
var attachments = new List<EmailAttachmentContext>();
foreach (var att in mail.Attachments)
if (withAttachments)
{
attachments.Add(new EmailAttachmentContext
foreach (var att in mail.Attachments)
{
FileName = att.FileName ?? "attachment",
Content = att.Data,
ContentType = att.ContentType?.ToString() ?? "application/octet-stream",
IsInline = false,
ContentId = att.ContentId
});
}
attachments.Add(new EmailAttachmentContext
{
FileName = att.FileName ?? "attachment",
Content = att.Data,
ContentType = att.ContentType?.ToString() ?? "application/octet-stream",
IsInline = false,
ContentId = att.ContentId
});
}
foreach (var vis in mail.Visuals)
{
attachments.Add(new EmailAttachmentContext
foreach (var vis in mail.Visuals)
{
FileName = vis.FileName ?? "inline",
Content = vis.Data,
ContentType = vis.ContentType?.ToString() ?? "application/octet-stream",
IsInline = true,
ContentId = vis.ContentId
});
attachments.Add(new EmailAttachmentContext
{
FileName = vis.FileName ?? "inline",
Content = vis.Data,
ContentType = vis.ContentType?.ToString() ?? "application/octet-stream",
IsInline = true,
ContentId = vis.ContentId
});
}
}
return new ReceivedEmailContext