/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "msgCore.h"    // precompiled header...
#include "nsCOMPtr.h"

#include "nsMailboxService.h"
#include "nsMailboxUrl.h"
#include "nsIMsgMailNewsUrl.h"
#include "nsMailboxProtocol.h"
#include "nsIMsgDatabase.h"
#include "nsMsgDBCID.h"
#include "MailNewsTypes.h"
#include "nsTArray.h"
#include "nsLocalUtils.h"
#include "nsMsgLocalCID.h"
#include "nsMsgBaseCID.h"
#include "nsIDocShell.h"
#include "nsIPop3Service.h"
#include "nsMsgUtils.h"
#include "nsNetUtil.h"
#include "nsIDocShellLoadInfo.h"
#include "nsIWebNavigation.h"
#include "prprf.h"
#include "nsIMsgHdr.h"
#include "nsIFileURL.h"

nsMailboxService::nsMailboxService()
{
    mPrintingOperation = false;
}

nsMailboxService::~nsMailboxService()
{}

NS_IMPL_ISUPPORTS(nsMailboxService, nsIMailboxService, nsIMsgMessageService, nsIProtocolHandler, nsIMsgMessageFetchPartService)

nsresult nsMailboxService::ParseMailbox(nsIMsgWindow *aMsgWindow, nsIFile *aMailboxPath, nsIStreamListener *aMailboxParser,
                    nsIUrlListener * aUrlListener, nsIURI ** aURL)
{
  NS_ENSURE_ARG_POINTER(aMailboxPath);

  nsresult rv;
  nsCOMPtr<nsIMailboxUrl> mailboxurl =
    do_CreateInstance(NS_MAILBOXURL_CONTRACTID, &rv);
  if (NS_SUCCEEDED(rv) && mailboxurl)
  {
    nsCOMPtr<nsIMsgMailNewsUrl> url = do_QueryInterface(mailboxurl);
    // okay now generate the url string
    nsCString mailboxPath;

    aMailboxPath->GetNativePath(mailboxPath);
    nsAutoCString buf;
    MsgEscapeURL(mailboxPath,
                 nsINetUtil::ESCAPE_URL_MINIMAL | nsINetUtil::ESCAPE_URL_FORCED, buf);
    nsEscapeNativePath(buf);
    url->SetUpdatingFolder(true);
    url->SetMsgWindow(aMsgWindow);
    nsAutoCString uriSpec("mailbox://");
    uriSpec.Append(buf);
    rv = url->SetSpec(uriSpec);
    NS_ENSURE_SUCCESS(rv, rv);

    mailboxurl->SetMailboxParser(aMailboxParser);
    if (aUrlListener)
      url->RegisterListener(aUrlListener);

    rv = RunMailboxUrl(url, nullptr);
    NS_ENSURE_SUCCESS(rv, rv);

    if (aURL)
    {
      *aURL = url;
      NS_IF_ADDREF(*aURL);
    }
  }

  return rv;
}

nsresult nsMailboxService::CopyMessage(const char * aSrcMailboxURI,
                              nsIStreamListener * aMailboxCopyHandler,
                              bool moveMessage,
                              nsIUrlListener * aUrlListener,
                              nsIMsgWindow *aMsgWindow,
                              nsIURI **aURL)
{
    nsMailboxAction mailboxAction = nsIMailboxUrl::ActionMoveMessage;
    if (!moveMessage)
        mailboxAction = nsIMailboxUrl::ActionCopyMessage;
  return FetchMessage(aSrcMailboxURI, aMailboxCopyHandler, aMsgWindow, aUrlListener, nullptr, mailboxAction, nullptr, aURL);
}

nsresult nsMailboxService::CopyMessages(uint32_t aNumKeys,
                                        nsMsgKey* aMsgKeys,
                                        nsIMsgFolder *srcFolder,
                                        nsIStreamListener * aMailboxCopyHandler,
                                        bool moveMessage,
                                        nsIUrlListener * aUrlListener,
                                        nsIMsgWindow *aMsgWindow,
                                        nsIURI **aURL)
{
  nsresult rv = NS_OK;
  NS_ENSURE_ARG(srcFolder);
  NS_ENSURE_ARG(aMsgKeys);
  nsCOMPtr<nsIMailboxUrl> mailboxurl;

  nsMailboxAction actionToUse = nsIMailboxUrl::ActionMoveMessage;
  if (!moveMessage)
     actionToUse = nsIMailboxUrl::ActionCopyMessage;

  nsCOMPtr <nsIMsgDBHdr> msgHdr;
  nsCOMPtr <nsIMsgDatabase> db;
  srcFolder->GetMsgDatabase(getter_AddRefs(db));
  if (db)
  {
    db->GetMsgHdrForKey(aMsgKeys[0], getter_AddRefs(msgHdr));
    if (msgHdr)
    {
      nsCString uri;
      srcFolder->GetUriForMsg(msgHdr, uri);
      rv = PrepareMessageUrl(uri.get(), aUrlListener, actionToUse , getter_AddRefs(mailboxurl), aMsgWindow);

      if (NS_SUCCEEDED(rv))
      {
        nsCOMPtr<nsIURI> url = do_QueryInterface(mailboxurl);
        nsCOMPtr<nsIMsgMailNewsUrl> msgUrl (do_QueryInterface(url));
        nsCOMPtr<nsIMailboxUrl> mailboxUrl (do_QueryInterface(url));
        msgUrl->SetMsgWindow(aMsgWindow);

        mailboxUrl->SetMoveCopyMsgKeys(aMsgKeys, aNumKeys);
        rv = RunMailboxUrl(url, aMailboxCopyHandler);
      }
    }
  }
  if (aURL && mailboxurl)
    CallQueryInterface(mailboxurl, aURL);

  return rv;
}

nsresult nsMailboxService::FetchMessage(const char* aMessageURI,
                                        nsISupports * aDisplayConsumer,
                                        nsIMsgWindow * aMsgWindow,
                                        nsIUrlListener * aUrlListener,
                                        const char * aFileName, /* only used by open attachment... */
                                        nsMailboxAction mailboxAction,
                                        const char * aCharsetOverride,
                                        nsIURI ** aURL)
{
  nsresult rv = NS_OK;
  nsCOMPtr<nsIMailboxUrl> mailboxurl;
  nsMailboxAction actionToUse = mailboxAction;
  nsCOMPtr<nsIURI> url;
  nsCOMPtr<nsIMsgMailNewsUrl> msgUrl;
  nsAutoCString uriString(aMessageURI);

  if (!strncmp(aMessageURI, "file:", 5))
  {
    int64_t fileSize;
    nsCOMPtr<nsIURI> fileUri;
    rv = NS_NewURI(getter_AddRefs(fileUri), aMessageURI);
    NS_ENSURE_SUCCESS(rv, rv);
    nsCOMPtr <nsIFileURL> fileUrl = do_QueryInterface(fileUri, &rv);
    NS_ENSURE_SUCCESS(rv, rv);
    nsCOMPtr <nsIFile> file;
    rv = fileUrl->GetFile(getter_AddRefs(file));
    NS_ENSURE_SUCCESS(rv, rv);
    file->GetFileSize(&fileSize);
    uriString.Replace(0, 5, NS_LITERAL_CSTRING("mailbox:"));
    uriString.Append(NS_LITERAL_CSTRING("&number=0"));
    rv = NS_NewURI(getter_AddRefs(url), uriString);
    NS_ENSURE_SUCCESS(rv, rv);

    msgUrl = do_QueryInterface(url);
    if (msgUrl)
    {
      msgUrl->SetMsgWindow(aMsgWindow);
      nsCOMPtr <nsIMailboxUrl> mailboxUrl = do_QueryInterface(msgUrl, &rv);
      mailboxUrl->SetMessageSize((uint32_t) fileSize);
      nsCOMPtr <nsIMsgHeaderSink> headerSink;
       // need to tell the header sink to capture some headers to create a fake db header
       // so we can do reply to a .eml file or a rfc822 msg attachment.
      if (aMsgWindow)
        aMsgWindow->GetMsgHeaderSink(getter_AddRefs(headerSink));
      if (headerSink)
      {
        nsCOMPtr <nsIMsgDBHdr> dummyHeader;
        headerSink->GetDummyMsgHeader(getter_AddRefs(dummyHeader));
        if (dummyHeader)
          dummyHeader->SetMessageSize((uint32_t) fileSize);
      }
    }
  }
  else
  {
    // this happens with forward inline of message/rfc822 attachment
    // opened in a stand-alone msg window.
    int32_t typeIndex = uriString.Find("&type=application/x-message-display");
    if (typeIndex != -1)
    {
      uriString.Cut(typeIndex, sizeof("&type=application/x-message-display") - 1);
      rv = NS_NewURI(getter_AddRefs(url), uriString.get());
      mailboxurl = do_QueryInterface(url);
    }
    else
      rv = PrepareMessageUrl(aMessageURI, aUrlListener, actionToUse , getter_AddRefs(mailboxurl), aMsgWindow);

    if (NS_SUCCEEDED(rv))
    {
      url = do_QueryInterface(mailboxurl);
      msgUrl = do_QueryInterface(url);
      msgUrl->SetMsgWindow(aMsgWindow);
      if (aFileName)
        msgUrl->SetFileName(nsDependentCString(aFileName));
    }
  }

  nsCOMPtr<nsIMsgI18NUrl> i18nurl(do_QueryInterface(msgUrl));
  if (i18nurl)
    i18nurl->SetCharsetOverRide(aCharsetOverride);

  // instead of running the mailbox url like we used to, let's try to run the url in the docshell...
  nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aDisplayConsumer, &rv));
  // if we were given a docShell, run the url in the docshell..otherwise just run it normally.
  if (NS_SUCCEEDED(rv) && docShell)
  {
    nsCOMPtr<nsIDocShellLoadInfo> loadInfo;
    // DIRTY LITTLE HACK --> if we are opening an attachment we want the docshell to
    // treat this load as if it were a user click event. Then the dispatching stuff will be much
    // happier.
    if (mailboxAction == nsIMailboxUrl::ActionFetchPart)
    {
      docShell->CreateLoadInfo(getter_AddRefs(loadInfo));
      loadInfo->SetLoadType(nsIDocShellLoadInfo::loadLink);
    }
    rv = docShell->LoadURI(url, loadInfo, nsIWebNavigation::LOAD_FLAGS_NONE, false);
  }
  else
    rv = RunMailboxUrl(url, aDisplayConsumer);

  if (aURL && mailboxurl)
    CallQueryInterface(mailboxurl, aURL);

  return rv;
}

NS_IMETHODIMP nsMailboxService::FetchMimePart(nsIURI *aURI, const char *aMessageURI, nsISupports *aDisplayConsumer, nsIMsgWindow *aMsgWindow, nsIUrlListener *aUrlListener, nsIURI **aURL)
{
  nsresult rv;
  nsCOMPtr<nsIMsgMailNewsUrl> msgUrl (do_QueryInterface(aURI, &rv));
  NS_ENSURE_SUCCESS(rv, rv);

  msgUrl->SetMsgWindow(aMsgWindow);

  // set up the url listener
  if (aUrlListener)
    msgUrl->RegisterListener(aUrlListener);

  return RunMailboxUrl(msgUrl, aDisplayConsumer);
}

NS_IMETHODIMP nsMailboxService::DisplayMessage(const char* aMessageURI,
                                               nsISupports * aDisplayConsumer,
                                               nsIMsgWindow * aMsgWindow,
                                               nsIUrlListener * aUrlListener,
                                               const char * aCharsetOveride,
                                               nsIURI ** aURL)
{
  return FetchMessage(aMessageURI, aDisplayConsumer,
    aMsgWindow,aUrlListener, nullptr,
    nsIMailboxUrl::ActionFetchMessage, aCharsetOveride, aURL);
}

NS_IMETHODIMP
nsMailboxService::StreamMessage(const char *aMessageURI,
                                nsISupports *aConsumer,
                                nsIMsgWindow *aMsgWindow,
                                nsIUrlListener *aUrlListener,
                                bool /* aConvertData */,
                                const nsACString &aAdditionalHeader,
                                bool aLocalOnly,
                                nsIURI **aURL)
{
    // The mailbox protocol object will look for "header=filter" or
    // "header=attach" to decide if it wants to convert the data instead of
    // using aConvertData. It turns out to be way too hard to pass aConvertData
    // all the way over to the mailbox protocol object.
    nsAutoCString aURIString(aMessageURI);
    if (!aAdditionalHeader.IsEmpty())
    {
      aURIString.FindChar('?') == -1 ? aURIString += "?" : aURIString += "&";
      aURIString += "header=";
      aURIString += aAdditionalHeader;
    }

    return FetchMessage(aURIString.get(), aConsumer, aMsgWindow, aUrlListener, nullptr,
                                        nsIMailboxUrl::ActionFetchMessage, nullptr, aURL);
}

NS_IMETHODIMP nsMailboxService::StreamHeaders(const char *aMessageURI,
                                              nsIStreamListener *aConsumer,
                                              nsIUrlListener *aUrlListener,
                                              bool aLocalOnly,
                                              nsIURI **aURL)
{
  NS_ENSURE_ARG_POINTER(aMessageURI);
  NS_ENSURE_ARG_POINTER(aConsumer);
  nsAutoCString folderURI;
  nsMsgKey msgKey;
  nsCOMPtr<nsIMsgFolder> folder;
  nsresult rv = DecomposeMailboxURI(aMessageURI, getter_AddRefs(folder), &msgKey);
  if (msgKey == nsMsgKey_None)
    return NS_MSG_MESSAGE_NOT_FOUND;

  nsCOMPtr<nsIInputStream> inputStream;
  int64_t messageOffset;
  uint32_t messageSize;
  rv = folder->GetOfflineFileStream(msgKey, &messageOffset, &messageSize, getter_AddRefs(inputStream));
  NS_ENSURE_SUCCESS(rv, rv);

  // GetOfflineFileStream returns NS_OK but null inputStream when there is an error getting the database
  if (!inputStream)
    return NS_ERROR_FAILURE;
  return MsgStreamMsgHeaders(inputStream, aConsumer);
}


NS_IMETHODIMP nsMailboxService::IsMsgInMemCache(nsIURI *aUrl,
                                                nsIMsgFolder *aFolder,
                                                nsICacheEntryDescriptor **aCacheEntry,
                                                bool *aResult)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP nsMailboxService::OpenAttachment(const char *aContentType,
                                               const char *aFileName,
                                               const char *aUrl,
                                               const char *aMessageUri,
                                               nsISupports *aDisplayConsumer,
                                               nsIMsgWindow *aMsgWindow,
                                               nsIUrlListener *aUrlListener)
{
  nsCOMPtr <nsIURI> URL;
  nsAutoCString urlString(aUrl);
  urlString += "&type=";
  urlString += aContentType;
  urlString += "&filename=";
  urlString += aFileName;
  CreateStartupUrl(urlString.get(), getter_AddRefs(URL));
  nsresult rv;

  // try to run the url in the docshell...
  nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aDisplayConsumer, &rv));
  // if we were given a docShell, run the url in the docshell..otherwise just run it normally.
  if (NS_SUCCEEDED(rv) && docShell)
  {
    nsCOMPtr<nsIDocShellLoadInfo> loadInfo;
    // DIRTY LITTLE HACK --> since we are opening an attachment we want the docshell to
    // treat this load as if it were a user click event. Then the dispatching stuff will be much
    // happier.
    docShell->CreateLoadInfo(getter_AddRefs(loadInfo));
    loadInfo->SetLoadType(nsIDocShellLoadInfo::loadLink);
    return docShell->LoadURI(URL, loadInfo, nsIWebNavigation::LOAD_FLAGS_NONE, false);
  }
  return RunMailboxUrl(URL, aDisplayConsumer);

}


NS_IMETHODIMP
nsMailboxService::SaveMessageToDisk(const char *aMessageURI,
                                    nsIFile *aFile,
                                    bool aAddDummyEnvelope,
                                    nsIUrlListener *aUrlListener,
                                    nsIURI **aURL,
                                    bool canonicalLineEnding,
                                    nsIMsgWindow *aMsgWindow)
{
  nsresult rv = NS_OK;
  nsCOMPtr<nsIMailboxUrl> mailboxurl;

  rv = PrepareMessageUrl(aMessageURI, aUrlListener, nsIMailboxUrl::ActionSaveMessageToDisk, getter_AddRefs(mailboxurl), aMsgWindow);

  if (NS_SUCCEEDED(rv))
  {
    nsCOMPtr<nsIMsgMessageUrl> msgUrl = do_QueryInterface(mailboxurl);
    if (msgUrl)
    {
      msgUrl->SetMessageFile(aFile);
      msgUrl->SetAddDummyEnvelope(aAddDummyEnvelope);
      msgUrl->SetCanonicalLineEnding(canonicalLineEnding);
    }

    nsCOMPtr<nsIURI> url = do_QueryInterface(mailboxurl);
    rv = RunMailboxUrl(url);
  }

  if (aURL && mailboxurl)
    CallQueryInterface(mailboxurl, aURL);

  return rv;
}

NS_IMETHODIMP nsMailboxService::GetUrlForUri(const char *aMessageURI, nsIURI **aURL, nsIMsgWindow *aMsgWindow)
{
  NS_ENSURE_ARG_POINTER(aURL);
  if (!strncmp(aMessageURI, "file:", 5) || PL_strstr(aMessageURI, "type=application/x-message-display")
    || !strncmp(aMessageURI, "mailbox:", 8))
    return NS_NewURI(aURL, aMessageURI);

  nsresult rv = NS_OK;
  nsCOMPtr<nsIMailboxUrl> mailboxurl;
  rv = PrepareMessageUrl(aMessageURI, nullptr, nsIMailboxUrl::ActionFetchMessage, getter_AddRefs(mailboxurl), aMsgWindow);
  if (NS_SUCCEEDED(rv) && mailboxurl)
    rv = CallQueryInterface(mailboxurl, aURL);
  return rv;
}

// Takes a mailbox url, this method creates a protocol instance and loads the url
// into the protocol instance.
nsresult nsMailboxService::RunMailboxUrl(nsIURI * aMailboxUrl, nsISupports * aDisplayConsumer)
{
  // create a protocol instance to run the url..
  nsresult rv = NS_OK;
  nsMailboxProtocol * protocol = new nsMailboxProtocol(aMailboxUrl);

  if (protocol)
  {
    rv = protocol->Initialize(aMailboxUrl);
    if (NS_FAILED(rv))
    {
      delete protocol;
      return rv;
    }
    NS_ADDREF(protocol);
    rv = protocol->LoadUrl(aMailboxUrl, aDisplayConsumer);
    NS_RELEASE(protocol); // after loading, someone else will have a ref cnt on the mailbox
  }

  return rv;
}

// This function takes a message uri, converts it into a file path & msgKey
// pair. It then turns that into a mailbox url object. It also registers a url
// listener if appropriate. AND it can take in a mailbox action and set that field
// on the returned url as well.
nsresult nsMailboxService::PrepareMessageUrl(const char * aSrcMsgMailboxURI, nsIUrlListener * aUrlListener,
                                             nsMailboxAction aMailboxAction, nsIMailboxUrl ** aMailboxUrl,
                                             nsIMsgWindow *msgWindow)
{
  nsresult rv = CallCreateInstance(NS_MAILBOXURL_CONTRACTID, aMailboxUrl);
  if (NS_SUCCEEDED(rv) && aMailboxUrl && *aMailboxUrl)
  {
    // okay now generate the url string
    char * urlSpec;
    nsAutoCString folderURI;
    nsMsgKey msgKey;
    nsCString folderPath;
    const char *part = PL_strstr(aSrcMsgMailboxURI, "part=");
    const char *header = PL_strstr(aSrcMsgMailboxURI, "header=");
    rv = nsParseLocalMessageURI(aSrcMsgMailboxURI, folderURI, &msgKey);
    NS_ENSURE_SUCCESS(rv,rv);
    rv = nsLocalURI2Path(kMailboxRootURI, folderURI.get(), folderPath);

    if (NS_SUCCEEDED(rv))
    {
      // set up the url spec and initialize the url with it.
      nsAutoCString buf;
      MsgEscapeURL(folderPath,
                   nsINetUtil::ESCAPE_URL_DIRECTORY | nsINetUtil::ESCAPE_URL_FORCED, buf);
      if (mPrintingOperation)
        urlSpec = PR_smprintf("mailbox://%s?number=%lu&header=print", buf.get(), msgKey);
      else if (part)
        urlSpec = PR_smprintf("mailbox://%s?number=%lu&%s", buf.get(), msgKey, part);
      else if (header)
        urlSpec = PR_smprintf("mailbox://%s?number=%lu&%s", buf.get(), msgKey, header);
      else
        urlSpec = PR_smprintf("mailbox://%s?number=%lu", buf.get(), msgKey);

      nsCOMPtr <nsIMsgMailNewsUrl> url = do_QueryInterface(*aMailboxUrl);
      rv = url->SetSpec(nsDependentCString(urlSpec));
      NS_ENSURE_SUCCESS(rv, rv);

      PR_smprintf_free(urlSpec);

      (*aMailboxUrl)->SetMailboxAction(aMailboxAction);

      // set up the url listener
      if (aUrlListener)
        rv = url->RegisterListener(aUrlListener);

      url->SetMsgWindow(msgWindow);
      nsCOMPtr<nsIMsgMessageUrl> msgUrl = do_QueryInterface(url);
      if (msgUrl)
      {
        msgUrl->SetOriginalSpec(aSrcMsgMailboxURI);
        msgUrl->SetUri(aSrcMsgMailboxURI);
      }

    } // if we got a url
  } // if we got a url

  return rv;
}

NS_IMETHODIMP nsMailboxService::GetScheme(nsACString &aScheme)
{
  aScheme = "mailbox";
  return NS_OK;
}

NS_IMETHODIMP nsMailboxService::GetDefaultPort(int32_t *aDefaultPort)
{
  NS_ENSURE_ARG_POINTER(aDefaultPort);
  *aDefaultPort = -1;  // mailbox doesn't use a port!!!!!
  return NS_OK;
}

NS_IMETHODIMP nsMailboxService::AllowPort(int32_t port, const char *scheme, bool *_retval)
{
  NS_ENSURE_ARG_POINTER(_retval);
  // don't override anything.
  *_retval = false;
  return NS_OK;
}

NS_IMETHODIMP nsMailboxService::GetProtocolFlags(uint32_t *result)
{
  NS_ENSURE_ARG_POINTER(result);
  *result = URI_STD | URI_FORBIDS_AUTOMATIC_DOCUMENT_REPLACEMENT |
            URI_DANGEROUS_TO_LOAD | URI_FORBIDS_COOKIE_ACCESS
#ifdef IS_ORIGIN_IS_FULL_SPEC_DEFINED
            | ORIGIN_IS_FULL_SPEC
#endif
  ;
  return NS_OK;
}

NS_IMETHODIMP nsMailboxService::NewURI(const nsACString &aSpec,
                                       const char *aOriginCharset,
                                       nsIURI *aBaseURI,
                                       nsIURI **_retval)
{
  NS_ENSURE_ARG_POINTER(_retval);
  *_retval = 0;
  nsresult rv;
  nsCOMPtr<nsIURI> aMsgUri = do_CreateInstance(NS_MAILBOXURL_CONTRACTID, &rv);
  NS_ENSURE_SUCCESS(rv, rv);
  // SetSpec calls below may fail if the mailbox url is of the form
  // mailbox://<account>/<mailbox name>?... instead of
  // mailbox://<path to folder>?.... This is the case for pop3 download urls.
  // We know this, and the failure is harmless.
  if (aBaseURI)
  {
    nsAutoCString newSpec;
    rv = aBaseURI->Resolve(aSpec, newSpec);
    NS_ENSURE_SUCCESS(rv, rv);
    (void) aMsgUri->SetSpec(newSpec);
  }
  else
  {
    (void) aMsgUri->SetSpec(aSpec);
  }
  aMsgUri.swap(*_retval);

  return rv;
}

NS_IMETHODIMP nsMailboxService::NewChannel(nsIURI *aURI, nsIChannel **_retval)
{
  NS_ENSURE_ARG_POINTER(aURI);
  NS_ENSURE_ARG_POINTER(_retval);
  nsresult rv = NS_OK;
  nsAutoCString spec;
  aURI->GetSpec(spec);

  if (spec.Find("?uidl=") >= 0 || spec.Find("&uidl=") >= 0)
  {
    nsCOMPtr<nsIProtocolHandler> handler =
             do_GetService(NS_POP3SERVICE_CONTRACTID1, &rv);
    if (NS_SUCCEEDED(rv))
    {
      nsCOMPtr <nsIURI> pop3Uri;

      rv = handler->NewURI(spec, "" /* ignored */, aURI, getter_AddRefs(pop3Uri));
      NS_ENSURE_SUCCESS(rv, rv);
      return handler->NewChannel(pop3Uri, _retval);
    }
  }
  nsMailboxProtocol * protocol = new nsMailboxProtocol(aURI);
  if (protocol)
  {
    rv = protocol->Initialize(aURI);
    if (NS_FAILED(rv))
    {
      delete protocol;
      return rv;
    }
    rv = CallQueryInterface(protocol, _retval);
  }
  else
    rv = NS_ERROR_NULL_POINTER;

  return rv;
}

nsresult nsMailboxService::DisplayMessageForPrinting(const char* aMessageURI,
                                                     nsISupports * aDisplayConsumer,
                                                     nsIMsgWindow * aMsgWindow,
                                                     nsIUrlListener * aUrlListener,
                                                     nsIURI ** aURL)
{
  mPrintingOperation = true;
  nsresult rv = FetchMessage(aMessageURI, aDisplayConsumer, aMsgWindow,aUrlListener, nullptr,
    nsIMailboxUrl::ActionFetchMessage, nullptr, aURL);
  mPrintingOperation = false;
  return rv;
}

NS_IMETHODIMP nsMailboxService::Search(nsIMsgSearchSession *aSearchSession, nsIMsgWindow *aMsgWindow, nsIMsgFolder *aMsgFolder, const char *aMessageUri)
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

nsresult
nsMailboxService::DecomposeMailboxURI(const char * aMessageURI, nsIMsgFolder ** aFolder, nsMsgKey *aMsgKey)
{
  NS_ENSURE_ARG_POINTER(aMessageURI);
  NS_ENSURE_ARG_POINTER(aFolder);
  NS_ENSURE_ARG_POINTER(aMsgKey);

  nsresult rv = NS_OK;
  nsAutoCString folderURI;
  rv = nsParseLocalMessageURI(aMessageURI, folderURI, aMsgKey);
  NS_ENSURE_SUCCESS(rv,rv);

  nsCOMPtr <nsIRDFService> rdf = do_GetService("@mozilla.org/rdf/rdf-service;1",&rv);
  NS_ENSURE_SUCCESS(rv,rv);

  nsCOMPtr<nsIRDFResource> res;
  rv = rdf->GetResource(folderURI, getter_AddRefs(res));
  NS_ENSURE_SUCCESS(rv,rv);

  rv = res->QueryInterface(NS_GET_IID(nsIMsgFolder), (void **) aFolder);
  NS_ENSURE_SUCCESS(rv,rv);

  return NS_OK;
}

NS_IMETHODIMP
nsMailboxService::MessageURIToMsgHdr(const char *uri, nsIMsgDBHdr **_retval)
{
  NS_ENSURE_ARG_POINTER(uri);
  NS_ENSURE_ARG_POINTER(_retval);

  nsresult rv = NS_OK;

  nsCOMPtr<nsIMsgFolder> folder;
  nsMsgKey msgKey;

  rv = DecomposeMailboxURI(uri, getter_AddRefs(folder), &msgKey);
  NS_ENSURE_SUCCESS(rv,rv);

  rv = folder->GetMessageHeader(msgKey, _retval);
  NS_ENSURE_SUCCESS(rv,rv);
  return NS_OK;
}
