/// <summary>
/// Build search filter from options.
/// </summary>
/// <param name="options">Options.</param>
/// <returns>Search filter collection.</returns>
private static SearchFilter.SearchFilterCollection BuildFilterCollection(ExchangeOptions options)
{
// Create search filter collection.
var searchFilter = new SearchFilter.SearchFilterCollection(LogicalOperator.And);
// Construct rest of search filter based on options
if (options.GetOnlyEmailsWithAttachments)
{
searchFilter.Add(new SearchFilter.IsEqualTo(ItemSchema.HasAttachments, true));
}
if (options.GetOnlyUnreadEmails)
{
searchFilter.Add(new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, false));
}
if (!string.IsNullOrEmpty(options.EmailSenderFilter))
{
searchFilter.Add(new SearchFilter.IsEqualTo(EmailMessageSchema.Sender, options.EmailSenderFilter));
}
if (!string.IsNullOrEmpty(options.EmailSubjectFilter))
{
searchFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Subject, options.EmailSubjectFilter));
}
return(searchFilter);
}
/// <summary>
/// Save attachments from collection to files.
/// </summary>
/// <param name="attachments">Attachments collection.</param>
/// <param name="options">Options.</param>
/// <returns>List of full paths to saved file attachments.</returns>
private static List <string> SaveAttachments(Microsoft.Exchange.WebServices.Data.AttachmentCollection attachments, ExchangeOptions options)
{
List <string> pathList = new List <string> {
};
foreach (var attachment in attachments)
{
FileAttachment file = attachment as FileAttachment;
string path = Path.Combine(
options.AttachmentSaveDirectory,
options.OverwriteAttachment ? file.Name :
String.Concat(
Path.GetFileNameWithoutExtension(file.Name), "_",
Guid.NewGuid().ToString(),
Path.GetExtension(file.Name))
);
file.Load(path);
pathList.Add(path);
}
return(pathList);
}
/// <summary>
/// Convert Email collection t EMailMessageResults.
/// </summary>
/// <param name="emails">Emails collection.</param>
/// <param name="exchangeService">Exchange services.</param>
/// <param name="options">Options.</param>
/// <returns>Collection of EmailMessageResult.</returns>
private static List <EmailMessageResult> ReadEmails(IEnumerable <EmailMessage> emails, ExchangeService exchangeService, ExchangeOptions options)
{
#if NET471
List <EmailMessageResult> result = new List <EmailMessageResult>();
foreach (EmailMessage email in emails)
{
// Define property set
var propSet = new PropertySet(
BasePropertySet.FirstClassProperties,
EmailMessageSchema.Body,
EmailMessageSchema.Attachments);
// Bind and load email message with desired properties
var newEmail = EmailMessage.Bind(exchangeService, email.Id, propSet);
var pathList = new List <string>();
if (!options.IgnoreAttachments)
{
// Save all attachments to given directory
pathList = SaveAttachments(newEmail.Attachments, options);
}
// Build result for email message
var emailMessage = new EmailMessageResult
{
Id = newEmail.Id.UniqueId,
Date = newEmail.DateTimeReceived,
Subject = newEmail.Subject,
BodyText = "",
BodyHtml = newEmail.Body.Text,
To = string.Join(",", newEmail.ToRecipients.Select(j => j.Address)),
From = newEmail.From.Address,
Cc = string.Join(",", newEmail.CcRecipients.Select(j => j.Address)),
AttachmentSaveDirs = pathList
};
// Catch exception in case of server version is earlier than Exchange2013
try { emailMessage.BodyText = newEmail.TextBody.Text; } catch { }
result.Add(emailMessage);
}
return(result);
#else
throw new Exception("Only supported on .NET Framework (i.e. on Windows).");
#endif
}
/// <summary>
/// Reads emails from an Exchange server. Can be used only on legacy (Windows) agents.
/// </summary>
/// <param name="settings">Settings to use</param>
/// <param name="options">Options to use</param>
/// <returns>
/// List of
/// {
/// string Id.
/// string To.
/// string Cc.
/// string From.
/// DateTime Date.
/// string Subject.
/// string BodyText.
/// string BodyHtml.
/// List(string) AttachmentSaveDirs
/// }
/// </returns>
public static List <EmailMessageResult> ReadEmailFromExchangeServer([PropertyTab] ExchangeSettings settings, [PropertyTab] ExchangeOptions options)
{
#if NET471
if (!options.IgnoreAttachments)
{
// Check that save directory is given
if (options.AttachmentSaveDirectory == "")
{
throw new ArgumentException("No save directory given. ",
nameof(options.AttachmentSaveDirectory));
}
// Check that save directory exists
if (!Directory.Exists(options.AttachmentSaveDirectory))
{
throw new ArgumentException("Could not find or access attachment save directory. ",
nameof(options.AttachmentSaveDirectory));
}
}
// Connect, create view and search filter
ExchangeService exchangeService = Services.ConnectToExchangeService(settings);
ItemView view = new ItemView(options.MaxEmails);
var searchFilter = BuildFilterCollection(options);
FindItemsResults <Item> exchangeResults;
if (!string.IsNullOrEmpty(settings.Mailbox))
{
var mb = new Mailbox(settings.Mailbox);
var fid = new FolderId(WellKnownFolderName.Inbox, mb);
var inbox = Folder.Bind(exchangeService, fid);
exchangeResults = searchFilter.Count == 0 ? inbox.FindItems(view) : inbox.FindItems(searchFilter, view);
}
else
{
exchangeResults = searchFilter.Count == 0 ? exchangeService.FindItems(WellKnownFolderName.Inbox, view) : exchangeService.FindItems(WellKnownFolderName.Inbox, searchFilter, view);
}
// Get email items
List <EmailMessage> emails = exchangeResults.Where(msg => msg is EmailMessage).Cast <EmailMessage>().ToList();
// Check if list is empty and if an error needs to be thrown.
if (emails.Count == 0 && options.ThrowErrorIfNoMessagesFound)
{
// If not, return a result with a notification of no found messages.
throw new ArgumentException("No messages matching the search filter found. ",
nameof(options.ThrowErrorIfNoMessagesFound));
}
// Load properties for each email and process attachments
var result = ReadEmails(emails, exchangeService, options);
// should delete mails?
if (options.DeleteReadEmails)
{
emails.ForEach(msg => msg.Delete(DeleteMode.HardDelete));
}
// should mark mails as read?
if (!options.DeleteReadEmails && options.MarkEmailsAsRead)
{
foreach (EmailMessage msg in emails)
{
msg.IsRead = true;
msg.Update(ConflictResolutionMode.AutoResolve);
}
}
return(result);
#else
throw new Exception("Only supported on .NET Framework (i.e. on Windows).");
#endif
}
