3 files changed, 33 insertions, 61 deletions

diff --git a/src/Common/UserLists/UserListDiff.cpp b/src/Common/UserLists/UserListDiff.cpp
deleted file mode 100644
index e763afe..0000000
--- a/src/Common/UserLists/UserListDiff.cpp
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * UserListDiff.cpp
- *
- * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
- *
- * This program is free software: you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License along
- * with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "UserListDiff.h"
-#include "UserList.h"
-
-namespace Mad {
-namespace Common {
-namespace UserLists {
-
-UserListDiff::UserListDiff(const UserList *oldList, const UserList *newList) {
-  for(UserList::const_iterator user = oldList->begin(); user != oldList->end(); ++user)
-    deletedUsers.insert(*user);
-
-  for(UserList::const_iterator user = newList->begin(); user != newList->end(); ++user) {
-    std::set<UserListEntry>::const_iterator it = deletedUsers.find(*user);
-
-    if(it != deletedUsers.end()) {
-      deletedUsers.erase(it);
-      unchangedUsers.insert(*user);
-    }
-    else {
-      addedUsers.insert(*user);
-    }
-  }
-}
-
-}
-}
-}
diff --git a/src/Common/UserLists/UserListDiff.h b/src/Common/UserLists/UserListDiff.h
index 41b8e81..5000adf 100644
--- a/src/Common/UserLists/UserListDiff.h
+++ b/src/Common/UserLists/UserListDiff.h
@@ -25,6 +25,7 @@
 #include "UserListEntry.h"
 #include <Core/Exception.h>
 
+#include <boost/bimap.hpp>
 #include <set>
 
 namespace Mad {
@@ -34,14 +35,16 @@ namespace UserLists {
 class UserList;
 
 class MAD_COMMON_EXPORT UserListDiff {
+  public:
+    typedef boost::bimap<boost::bimaps::set_of<UserListEntry>, boost::bimaps::set_of<UserListEntry> > EntryListMap;
+
   private:
     std::set<UserListEntry> addedUsers;
     std::set<UserListEntry> deletedUsers;
-    std::set<UserListEntry> unchangedUsers;
+    EntryListMap updatedUsers;
 
   public:
     UserListDiff() {}
-    UserListDiff(const UserList *oldList, const UserList *newList);
 
     void invert() {
       addedUsers.swap(deletedUsers);
@@ -55,29 +58,35 @@ class MAD_COMMON_EXPORT UserListDiff {
       return deletedUsers;
     }
 
-    const std::set<UserListEntry>& getUnchangedUsers() const {
-      return unchangedUsers;
+    const EntryListMap& getUpdatedUsers() const {
+      return updatedUsers;
     }
 
     bool insertAddedUser(UserListEntry user) {
-      if(deletedUsers.count(user) || unchangedUsers.count(user))
+      if(updatedUsers.right.count(user))
         return false;
 
       return addedUsers.insert(user).second;
     }
 
     bool insertDeletedUser(UserListEntry user) {
-      if(addedUsers.count(user) || unchangedUsers.count(user))
+      if(updatedUsers.left.count(user))
         return false;
 
       return deletedUsers.insert(user).second;
     }
 
-    bool insertUnchangedUser(UserListEntry user) {
-      if(addedUsers.count(user) || deletedUsers.count(user))
+    bool insertUpdatedUser(UserListEntry oldUser, UserListEntry newUser) {
+      if(deletedUsers.count(oldUser) || addedUsers.count(newUser))
+        return false;
+
+      // this won't allow exchanging two users, but that's ok for now...
+      if(updatedUsers.left.count(oldUser) || updatedUsers.right.count(newUser))
+        return false;
+      if(updatedUsers.right.count(oldUser) || updatedUsers.left.count(newUser))
         return false;
 
-      return unchangedUsers.insert(user).second;
+      return updatedUsers.left.insert(std::make_pair(oldUser, newUser)).second;
     }
 };
 
diff --git a/src/Common/UserLists/Util.cpp b/src/Common/UserLists/Util.cpp
index cf04218..483383e 100644
--- a/src/Common/UserLists/Util.cpp
+++ b/src/Common/UserLists/Util.cpp
@@ -77,9 +77,13 @@ void Util::serializeUserListDiff(const UserListDiff *diff, XmlData *data) {
   for(std::set<UserListEntry>::const_iterator user = diff->getDeletedUsers().begin(); user != diff->getDeletedUsers().end(); ++user)
     serializeUserListEntry(&*user, userList->addEntry());
 
-  userList = data->createList("unchangedUsers");
-  for(std::set<UserListEntry>::const_iterator user = diff->getUnchangedUsers().begin(); user != diff->getUnchangedUsers().end(); ++user)
-    serializeUserListEntry(&*user, userList->addEntry());
+  userList = data->createList("updatedUsers");
+  const UserListDiff::EntryListMap::left_map &updatedUsers = diff->getUpdatedUsers().left;
+  for(UserListDiff::EntryListMap::left_const_iterator user = updatedUsers.begin(); user != updatedUsers.end(); ++user) {
+    XmlData::List *entryList = userList->addEntry()->createList("entry");
+    serializeUserListEntry(&user->first, entryList->addEntry());
+    serializeUserListEntry(&user->second, entryList->addEntry());
+  }
 }
 
 boost::shared_ptr<UserListDiff> Util::deserializeUserListDiff(const XmlData *data) {
@@ -97,10 +101,15 @@ boost::shared_ptr<UserListDiff> Util::deserializeUserListDiff(const XmlData *dat
       diff->insertDeletedUser(deserializeUserListEntry(user));
   }
 
-  userList = data->getList("unchangedUsers");
+  userList = data->getList("updatedUsers");
   if(userList) {
-    for(XmlData::List::const_iterator user = userList->begin(); user != userList->end(); ++user)
-      diff->insertUnchangedUser(deserializeUserListEntry(user));
+    for(XmlData::List::const_iterator user = userList->begin(); user != userList->end(); ++user) {
+      const XmlData::List *entryList = user->getList("entry");
+      if(entryList->getSize() != 2)
+        continue;
+
+      diff->insertUpdatedUser(deserializeUserListEntry(entryList->begin()), deserializeUserListEntry(entryList->begin()+1));
+    }
   }
 
   return diff;