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authorpeterbell10 <peterbell10@live.co.uk>2018-07-20 01:30:09 +0200
committerGitHub <noreply@github.com>2018-07-20 01:30:09 +0200
commit4fbf04413d68446777832b6c980bfac7879903c1 (patch)
tree8d2a64e019c4f436c89e56633b9db3d7c6ae9fef /src
parentcBlockArea: Write all present data types by default (#4252) (diff)
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Diffstat (limited to 'src')
-rw-r--r--src/ClientHandle.cpp6
-rw-r--r--src/Entities/Player.cpp59
-rw-r--r--src/UUID.cpp6
3 files changed, 59 insertions, 12 deletions
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index ff649ea4d..bbcb64d33 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -273,11 +273,9 @@ cUUID cClientHandle::GenerateOfflineUUID(const AString & a_Username)
// Online UUIDs are always version 4 (random)
// We use Version 3 (MD5 hash) UUIDs for the offline UUIDs
// This guarantees that they will never collide with an online UUID and can be distinguished.
+ // This is also consistent with the vanilla offline UUID scheme.
- // First make the username lowercase:
- AString lcUsername = StrToLower(a_Username);
-
- return cUUID::GenerateVersion3(lcUsername);
+ return cUUID::GenerateVersion3("OfflinePlayer:" + a_Username);
}
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index e984534a5..6ddfeb75c 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -36,6 +36,41 @@
// 1000 = once per second
#define PLAYER_LIST_TIME_MS std::chrono::milliseconds(1000)
+namespace
+{
+
+/** Returns the old Offline UUID generated before becoming vanilla compliant. */
+cUUID GetOldStyleOfflineUUID(const AString & a_PlayerName)
+{
+ // Use lowercase username
+ auto BaseUUID = cUUID::GenerateVersion3(StrToLower(a_PlayerName)).ToRaw();
+ // Clobber a full nibble around the variant bits
+ BaseUUID[8] = (BaseUUID[8] & 0x0f) | 0x80;
+
+ cUUID Ret;
+ Ret.FromRaw(BaseUUID);
+ return Ret;
+}
+
+
+
+
+
+/** Returns the folder for the player data based on the UUID given.
+This can be used both for online and offline UUIDs. */
+AString GetUUIDFolderName(const cUUID & a_Uuid)
+{
+ AString UUID = a_Uuid.ToShortString();
+
+ AString res(FILE_IO_PREFIX "players/");
+ res.append(UUID, 0, 2);
+ res.push_back('/');
+ return res;
+}
+
+} // namespace (anonymous)
+
+
@@ -2055,8 +2090,25 @@ bool cPlayer::LoadFromDisk(cWorldPtr & a_World)
return true;
}
- // Load from the offline UUID file, if allowed:
+ // Check for old offline UUID filename, if it exists migrate to new filename
cUUID OfflineUUID = cClientHandle::GenerateOfflineUUID(GetName());
+ auto OldFilename = GetUUIDFileName(GetOldStyleOfflineUUID(GetName()));
+ auto NewFilename = GetUUIDFileName(m_UUID);
+ // Only move if there isn't already a new file
+ if (!cFile::IsFile(NewFilename) && cFile::IsFile(OldFilename))
+ {
+ cFile::CreateFolderRecursive(GetUUIDFolderName(m_UUID)); // Ensure folder exists to move to
+ if (
+ cFile::Rename(OldFilename, NewFilename) &&
+ (m_UUID == OfflineUUID) &&
+ LoadFromFile(NewFilename, a_World)
+ )
+ {
+ return true;
+ }
+ }
+
+ // Load from the offline UUID file, if allowed:
const char * OfflineUsage = " (unused)";
if (cRoot::Get()->GetServer()->ShouldLoadOfflinePlayerData())
{
@@ -2227,8 +2279,7 @@ void cPlayer::OpenHorseInventory()
bool cPlayer::SaveToDisk()
{
- cFile::CreateFolder(FILE_IO_PREFIX + AString("players/")); // Create the "players" folder, if it doesn't exist yet (#1268)
- cFile::CreateFolder(FILE_IO_PREFIX + AString("players/") + m_UUID.ToShortString().substr(0, 2));
+ cFile::CreateFolderRecursive(GetUUIDFolderName(m_UUID));
// create the JSON data
Json::Value JSON_PlayerPosition;
@@ -2864,7 +2915,7 @@ AString cPlayer::GetUUIDFileName(const cUUID & a_UUID)
{
AString UUID = a_UUID.ToLongString();
- AString res("players/");
+ AString res(FILE_IO_PREFIX "players/");
res.append(UUID, 0, 2);
res.push_back('/');
res.append(UUID, 2, AString::npos);
diff --git a/src/UUID.cpp b/src/UUID.cpp
index c04e585d7..9ed7dc492 100644
--- a/src/UUID.cpp
+++ b/src/UUID.cpp
@@ -270,10 +270,8 @@ cUUID cUUID::GenerateVersion3(const AString & a_Name)
// Insert version number
UUID.m_UUID[6] = (UUID.m_UUID[6] & 0x0f) | 0x30;
- /* Insert variant number
- Note that by using 1000 instead of 10xx we are losing 2 bits
- but this is needed for compatibility with the old string uuid generator */
- UUID.m_UUID[8] = (UUID.m_UUID[8] & 0x0f) | 0x80;
+ // Insert variant number
+ UUID.m_UUID[8] = (UUID.m_UUID[8] & 0x3f) | 0x80;
return UUID;
}