public void Log(ExchangeResult exchangeResults)
{
if (exchangeResults != null)
{
logs.AddRange(exchangeResults.logs);
}
}
public ExchangeResult Restore()
{
ExchangeResult result = new ExchangeResult();
// recipient can contain multiple addresses seperated by semi colons
foreach (string address in recipient.Split(';'))
{
result.Log(ExecuteOperation(EmailOperation.Restore, address));
}
return(result);
}
ExchangeResult ExecuteOperation(EmailOperation operation, string address, Dictionary <string, bool> processed = null)
{
// create processed addresses dictionary if it does not exist
if (processed == null)
{
processed = new Dictionary <string, bool>();
}
// dont reprocess this address if we have already processed it
if (processed.ContainsKey(address))
{
return(null);
}
// try to find a mailbox for the address on one of the tenants
ExchangeService service = null;
EmailAddress mailbox = null;
foreach (WebCredentials cred in credentials)
{
service = new ExchangeService();
service.Credentials = cred;
service.Url = new Uri(ConfigurationManager.AppSettings["url"]);
try
{
NameResolutionCollection results = service.ResolveName("smtp:" + address);
if (results.Count > 0)
{
mailbox = results[0].Mailbox;
break;
}
}
catch (Exception e)
{
return(new ExchangeResult(address, StatusCode.Error, "Failed to resolve name: " + e.Message));
}
}
// if we did not find a mailbox for the address on any of the tenants then report recipient not found
if (mailbox == null)
{
return(new ExchangeResult(address, StatusCode.RecipientNotFound, "recipient not found"));
}
// add resolved address to processed list to prevent reprocessing
processed.Add(mailbox.Address, true);
// if this mailbox is a group/distribution list
if (mailbox.MailboxType == MailboxType.PublicGroup)
{
// attempt to expand the group
ExpandGroupResults group = null;
try { group = service.ExpandGroup(mailbox.Address); }
catch (Exception e)
{
// report failure to expand group if an exception occurs during expansion
return(new ExchangeResult(mailbox.Address, StatusCode.Error, "Failed to expand group: " + e.Message));
}
// for every member in the group
ExchangeResult result = new ExchangeResult();
foreach (EmailAddress member in group.Members)
{
// recursively execute operation and log results
result.Log(ExecuteOperation(operation, member.Address, processed));
}
// return the results
return(result);
}
// if this is just a regular mailbox
else if (mailbox.MailboxType == MailboxType.Mailbox)
{
// set impersonation to the mailbox address
service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, mailbox.Address);
// attempt to get some info to see if impersonation worked
try { DateTime?dt = service.GetPasswordExpirationDate(mailbox.Address); }
catch (Exception e)
{
// if we were unable to impersonate the user then report error
return(new ExchangeResult(mailbox.Address, StatusCode.Error, "impersonation failed: " + e.Message));
}
// delete email if operation is delete
if (operation == EmailOperation.Delete)
{
try
{
// find all instances of the email with message_id in the mailbox
FolderView folderView = new FolderView(int.MaxValue);
folderView.PropertySet = new PropertySet(BasePropertySet.IdOnly, FolderSchema.DisplayName);
folderView.Traversal = FolderTraversal.Shallow;
SearchFilter folderFilter = new SearchFilter.IsEqualTo(FolderSchema.DisplayName, "AllItems");
FindFoldersResults folders = service.FindFolders(WellKnownFolderName.Root, folderFilter, folderView);
SearchFilter filter = new SearchFilter.IsEqualTo(EmailMessageSchema.InternetMessageId, message_id);
ItemView view = new ItemView(int.MaxValue);
view.PropertySet = new PropertySet(BasePropertySet.IdOnly);
view.Traversal = ItemTraversal.Shallow;
List <ItemId> items = new List <ItemId>();
foreach (Item item in service.FindItems(folders.Folders[0].Id, filter, view))
{
items.Add(item.Id);
}
// if no instances of the email were found in the mailbox then report message_id not found
if (items.Count == 0)
{
return(new ExchangeResult(mailbox.Address, StatusCode.MessageNotFound, "message_id not found"));
}
// delete all found instances of the email with message_id from the mailbox
foreach (ServiceResponse response in service.DeleteItems(items, DeleteMode.SoftDelete, null, null))
{
// if we failed to delete an instance of the email then report an error
if (response.Result != ServiceResult.Success)
{
string message = "failed to delete email: " + response.ErrorCode + " " + response.ErrorMessage;
return(new ExchangeResult(mailbox.Address, StatusCode.Error, message));
}
}
} catch (Exception e)
{
//report any errors we encounter
return(new ExchangeResult(mailbox.Address, StatusCode.Error, "failed to delete email: " + e.Message));
}
}
// recover email if operation is recover
else if (operation == EmailOperation.Restore)
{
try
{
// find all instances of the email with message_id in the recoverable items folder
SearchFilter filter = new SearchFilter.IsEqualTo(EmailMessageSchema.InternetMessageId, message_id);
ItemView view = new ItemView(int.MaxValue);
view.PropertySet = new PropertySet(BasePropertySet.IdOnly);
view.Traversal = ItemTraversal.Shallow;
List <ItemId> items = new List <ItemId>();
foreach (Item item in service.FindItems(WellKnownFolderName.RecoverableItemsDeletions, filter, view))
{
items.Add(item.Id);
}
// if no instances of the email with message_id were found in the recoverable items folder of the mailbox
if (items.Count == 0)
{
// report message_id not found
return(new ExchangeResult(mailbox.Address, StatusCode.MessageNotFound, "message_id not found"));
}
// move every instance of the email with message_id in the recoverable items folder to the inbox
foreach (ServiceResponse response in service.MoveItems(items, new FolderId(WellKnownFolderName.Inbox)))
{
// if we failed to move an instance of the email to the inbox then report an error
if (response.Result != ServiceResult.Success)
{
string message = "failed to recover email: " + response.ErrorCode + " " + response.ErrorMessage;
return(new ExchangeResult(mailbox.Address, StatusCode.Error, message));
}
}
} catch (Exception e)
{
// report any errors we encounter
return(new ExchangeResult(mailbox.Address, StatusCode.Error, "failed to recover email: " + e.Message));
}
}
// report successful operation
return(new ExchangeResult(mailbox.Address, StatusCode.Success, "success"));
}
// report that the mailbox type is not one of the supported types
return(new ExchangeResult(mailbox.Address, StatusCode.Error, "Unsupported mailbox type: " + mailbox.MailboxType.ToString()));
}