Bug #237151 --> Make the junk mail filter support the ability to reset the training data. This code is not called by anyone yet but is part of the build.

sr=bienvenu
a=asa

mailnews/base/resources/locale/en-US/messenger.properties

@@ -288,3 +288,7 @@ passwordTitle=Mail Server Password Required
 # for checking if the user really wants to open lots of messages
 openWindowWarningTitle=Confirm
 openWindowWarningText=Opening %S messages may be slow.  Continue?
+
+# for checking if the user really wants to delete the adaptive filter training set
+confirmResetJunkTrainingTitle=Confirm
+confirmResetJunkTrainingText=Are you sure you want to reset the adaptive filter training data?

mailnews/base/search/public/nsIMsgFilterPlugin.idl

@@ -120,4 +120,9 @@ interface nsIJunkMailPlugin : nsIMsgFilterPlugin
         in nsIJunkMailClassificationListener aListener);
 
     readonly attribute boolean userHasClassified;
+ 
+    /** Removes the training file and clears out any in memory training tokens. 
+        User must retrain after doing this.
+    **/
+    void resetTrainingData();
 };

mailnews/extensions/bayesian-spam-filter/src/nsBayesianFilter.cpp

@@ -1010,3 +1010,27 @@ NS_IMETHODIMP nsBayesianFilter::SetMessageClassification(const char *aMsgURL,
     analyzer->setTokenListener(tokenListener);
     return tokenizeMessage(aMsgURL, aMsgWindow, analyzer);
 }
+
+NS_IMETHODIMP nsBayesianFilter::ResetTrainingData()
+{
+  // clear out our in memory training tokens...
+  if (mGoodCount && mGoodTokens.countTokens())
+  {
+    mGoodTokens.clearTokens();
+    mGoodCount = 0;
+  }
+
+  if (mBadCount && mBadTokens.countTokens())
+  {
+    mBadTokens.clearTokens();
+    mBadCount = 0;
+  }
+
+  // now remove training.dat
+  nsCOMPtr<nsILocalFile> file;
+  nsresult rv = getTrainingFile(file);
+  if (file)
+    file->Remove(PR_FALSE);
+
+  return NS_OK;
+}