5 files changed, 62 insertions, 3 deletions
diff --git a/src/messaging/maildirFolder.cpp b/src/messaging/maildirFolder.cpp
index 54d35989..21b97016 100644
--- a/src/messaging/maildirFolder.cpp
+++ b/src/messaging/maildirFolder.cpp
@@ -343,13 +343,16 @@ void maildirFolder::scanFolder()
 		for (std::vector <utility::file::path::component>::const_iterator
 		     it = newMessageFilenames.begin() ; it != newMessageFilenames.end() ; ++it)
 		{
+			const utility::file::path::component newFilename =
+				maildirUtils::buildFilename(maildirUtils::extractId(*it), 0);
+
 			// Move messages from 'new' to 'cur'
 			utility::auto_ptr <utility::file> file = fsf->create(newDirPath / *it);
-			file->rename(curDirPath / *it);
+			file->rename(curDirPath / newFilename);
 
 			// Append to message list
 			messageInfos msgInfos;
-			msgInfos.path = *it;
+			msgInfos.path = newFilename;
 			msgInfos.type = messageInfos::TYPE_CUR;
 
 			m_messageInfos.push_back(msgInfos);
diff --git a/src/messaging/maildirUtils.cpp b/src/messaging/maildirUtils.cpp
index e620ce0a..aba91372 100644
--- a/src/messaging/maildirUtils.cpp
+++ b/src/messaging/maildirUtils.cpp
@@ -20,6 +20,8 @@
 #include "maildirUtils.hpp"
 #include "maildirStore.hpp"
 
+#include "../utility/random.hpp"
+
 
 namespace vmime {
 namespace messaging {
@@ -125,7 +127,9 @@ const int maildirUtils::extractFlags(const utility::file::path::component& comp)
 const utility::file::path::component maildirUtils::buildFlags(const int flags)
 {
 	string str;
-	str.reserve(6);
+	str.reserve(8);
+
+	str += "2,";
 
 	if (flags & message::FLAG_MARKED)  str += "F";
 	if (flags & message::FLAG_PASSED)  str += "P";
@@ -151,6 +155,20 @@ const utility::file::path::component maildirUtils::buildFilename
 }
 
 
+const utility::file::path::component maildirUtils::generateId()
+{
+	std::ostringstream oss;
+
+	oss << utility::random::getTime();
+	oss << ".";
+	oss << utility::random::getProcess();
+	oss << ".";
+	oss << utility::random::getString(6);
+
+	return (utility::file::path::component(oss.str()));
+}
+
+
 
 //
 // messageIdComparator
diff --git a/src/messaging/maildirUtils.hpp b/src/messaging/maildirUtils.hpp
index d65e5d3e..6d5f0628 100644
--- a/src/messaging/maildirUtils.hpp
+++ b/src/messaging/maildirUtils.hpp
@@ -128,6 +128,12 @@ public:
 	  */
 	static const utility::file::path::component buildFilename(const utility::file::path::component& id, const int flags);
 
+	/** Generate a new unique message identifier.
+	  *
+	  * @return unique message id
+	  */
+	static const utility::file::path::component generateId();
+
 private:
 
 	static const vmime::word TMP_DIR;
diff --git a/src/utility/random.cpp b/src/utility/random.cpp
index b2a935d8..cefaea3e 100644
--- a/src/utility/random.cpp
+++ b/src/utility/random.cpp
@@ -55,5 +55,25 @@ const unsigned int random::getProcess()
 }
 
 
+const string random::getString(const int length, const string& randomChars)
+{
+	string res;
+	res.resize(length);
+
+	const unsigned int x = randomChars.length();
+	int c = 0;
+
+	while (c < length)
+	{
+		for (unsigned int n = random::getNext() ; n != 0 ; n /= x)
+		{
+			res[c++] = randomChars[n % x];
+		}
+	}
+
+	return (res);
+}
+
+
 } // utility
 } // vmime
diff --git a/src/utility/random.hpp b/src/utility/random.hpp
index 70ae6716..442905a5 100644
--- a/src/utility/random.hpp
+++ b/src/utility/random.hpp
@@ -21,6 +21,9 @@
 #define VMIME_UTILITY_RANDOM_HPP_INCLUDED
 
 
+#include "types.hpp"
+
+
 namespace vmime {
 namespace utility {
 
@@ -52,6 +55,15 @@ public:
 	  */
 	static const unsigned int getProcess();
 
+	/** Return a random character string with the specified length.
+	  *
+	  * @param length length of the string to generate
+	  * @param randomChars list of characters to use
+	  * @return random string
+	  */
+	static const string getString(const int length, const string& randomChars
+		= "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789");
+
 protected:
 
 	static unsigned int m_next;