Fix for 153465. In nsImapService::DeleteFolder(), if it's an aol server then use the new 'deletefolder' url to remove all msgs and the folder itself. r=naving, sr=bienvenu.

mailnews/imap/public/nsIImapUrl.idl

@@ -182,6 +182,8 @@ interface nsIImapUrl : nsISupports
   const long nsImapSaveMessageToDisk = 0x10000030;
   const long nsImapOpenMimePart = 0x10000031;
   const long nsImapMsgDownloadForOffline	= 0x10000032;
+  const long nsImapDeleteFolderAndMsgs = 0x10000033;
+
 };
 
 %{C++

mailnews/imap/src/nsImapProtocol.cpp

@@ -2039,6 +2039,9 @@ void nsImapProtocol::ProcessSelectedStateURL()
               HandleMemoryFailure();
         }
         break;
+      case nsIImapUrl::nsImapDeleteFolderAndMsgs:
+        DeleteFolderAndMsgs(mailboxName);
+        break;
       case nsIImapUrl::nsImapDeleteAllMsgs:
         {
           uint32 numberOfMessages = GetServerStateParser().NumberOfMessages();
@@ -5719,6 +5722,31 @@ void nsImapProtocol::OnDeleteFolder(const char * sourceMailbox)
     }
 }
 
+void nsImapProtocol::RemoveMsgsAndExpunge()
+{
+  uint32 numberOfMessages = GetServerStateParser().NumberOfMessages();
+  if (numberOfMessages)
+  {
+    // Remove all msgs and expunge the folder (ie, compact it).
+    Store("1:*", "+FLAGS.SILENT (\\Deleted)", PR_FALSE);  // use sequence #'s  
+    if (GetServerStateParser().LastCommandSuccessful())
+      Expunge();
+  }
+}
+
+void nsImapProtocol::DeleteFolderAndMsgs(const char * sourceMailbox)
+{
+  RemoveMsgsAndExpunge();
+  if (GetServerStateParser().LastCommandSuccessful())
+  {
+    // All msgs are deleted successfully - let's remove the folder itself.
+    PRBool reportingErrors = GetServerStateParser().GetReportingErrors();
+    GetServerStateParser().SetReportingErrors(PR_FALSE);
+    OnDeleteFolder(sourceMailbox);
+    GetServerStateParser().SetReportingErrors(reportingErrors);
+  }
+}
+
 void nsImapProtocol::OnRenameFolder(const char * sourceMailbox)
 {
   char *destinationMailbox = OnCreateServerDestinationFolderPathString();

mailnews/imap/src/nsImapProtocol.h

@@ -492,6 +492,8 @@ private:
 	void OnDeleteFolder(const char * aSourceMailbox);
 	void OnRenameFolder(const char * aSourceMailbox);
 	void OnMoveFolderHierarchy(const char * aSourceMailbox);
+  void DeleteFolderAndMsgs(const char * aSourceMailbox);
+  void RemoveMsgsAndExpunge();
 	void FindMailboxesIfNecessary();
 	void CreateMailbox(const char *mailboxName);
   void DeleteMailbox(const char *mailboxName);

mailnews/imap/src/nsImapService.cpp

@@ -1569,6 +1569,18 @@ nsImapService::DeleteFolder(nsIEventQueue* eventQueue,
     nsCOMPtr<nsIImapUrl> imapUrl;
     nsCAutoString urlSpec;
 
+    // If it's an aol server then use 'deletefolder' url to 
+    // remove all msgs first and then remove the folder itself.
+    PRBool removeFolderAndMsgs = PR_FALSE;
+    nsCOMPtr<nsIMsgIncomingServer> server;
+    if (NS_SUCCEEDED(folder->GetServer(getter_AddRefs(server))) && server)
+    {
+      nsCOMPtr <nsIImapIncomingServer> imapServer = do_QueryInterface(server);
+      if (imapServer) 
+        imapServer->GetIsAOLServer(&removeFolderAndMsgs);
+
+    }
+
     PRUnichar hierarchySeparator = GetHierarchyDelimiter(folder);
     rv = CreateStartOfImapUrl(nsnull, getter_AddRefs(imapUrl), folder, urlListener, urlSpec, hierarchySeparator);
     if (NS_SUCCEEDED(rv))
@@ -1578,7 +1590,10 @@ nsImapService::DeleteFolder(nsIEventQueue* eventQueue,
         {
             nsCOMPtr<nsIURI> uri = do_QueryInterface(imapUrl);
 
-            urlSpec.Append("/delete>");
+            if (removeFolderAndMsgs)
+              urlSpec.Append("/deletefolder>");
+            else
+              urlSpec.Append("/delete>");
             urlSpec.Append(char(hierarchySeparator));
             
             nsXPIDLCString folderName;

mailnews/imap/src/nsImapUrl.cpp

@@ -635,6 +635,11 @@ void nsImapUrl::ParseImapPart(char *imapPartOfUrl)
       m_imapAction = nsImapDeleteFolder;
       ParseFolderPath(&m_sourceCanonicalFolderPathSubString);
     }
+    else if (!nsCRT::strcasecmp(m_urlidSubString, "deletefolder"))
+    {
+      m_imapAction = nsImapDeleteFolderAndMsgs;
+      ParseFolderPath(&m_sourceCanonicalFolderPathSubString);
+    }
     else if (!nsCRT::strcasecmp(m_urlidSubString, "rename"))
     {
       m_imapAction = nsImapRenameFolder;