[Markle98]

Old world stats

Adds optional support for showing the stats of a previous world next to the current ones, in both leaderboards and single-player lookups.

If no old world data is configured, the output is identical to the original mod.

What it looks like

--- Most Chest Crafted (Old world) (Page 1) ---
#1 marcel_mrm: 1,824 (3,243)

The value outside the parentheses is the current world, the one inside is the old world.

New optional mode argument

Every /stats <player> ... and /stats top ... command accepts an optional trailing mode, usable before or after the existing [share] flag:

Mode	Behaviour
both (default)	Current value, old world value in parentheses
current	Current world only (original behaviour)
old	Old world only, ranked by the old values
total	Current + old world added together

Examples:

/stats top custom minecraft:play_time total
/stats top crafted minecraft:chest 2 old
/stats Steve mined minecraft:diamond_ore current

Notes:

• The leaderboard header shows the active mode: (Old world), (Old world only) or (Total).
• The [Share] button keeps the selected mode.
• both falls back to current when there is no old data. old and total return a clear error instead.
• The help text is updated.

How old data is loaded

• Put the old world's stats/*.json in config/stats-command/old-world/stats/ (an optional usercache.json can go in old-world/).
• Files are read once at startup in a background daemon thread and kept in memory, read-only. Commands never read old files from disk, and the existing StatsIndex is untouched.
• Old stats key minecraft:custom/minecraft:play_one_minute is mapped to the current play_time.

UUID handling (Bedrock / Floodgate and premium players)

The old world used offline UUIDs, while the current world uses the offline UUID derived from the player name (e.g. EasyAuth with forced-offline-uuid). To match players across worlds:

• Floodgate (00000000-0000-0000-0009-...) and premium (version 4) UUIDs are translated to the offline UUID of the player's name. Names are resolved from the old world's usercache.json, the server's usercache.json, or the server's own profile lookup.
• Offline UUIDs are kept as they are.
• Floodgate UUIDs whose name cannot be found are skipped and listed in the log, so nothing is silently misattributed.
• uuid-map.json ("old uuid": "new uuid or player name") can override any of these by hand.
• If several old files end up as one player: regular files are summed, files from Floodgate UUIDs only raise the value (they may be copies of the same data).

Duplicate rows fix

The same person can have stats stored under several UUIDs, for example a Floodgate UUID file and its migrated offline copy. Previously this could show a player twice in a leaderboard. All UUIDs are now reduced to the canonical one before building rows, keeping the highest value, so one person is always one row.

Code changes

• StatsMode (new): the four modes, header labels, and the helper that builds the share command.
• OldWorldStats (new): loading, UUID translation and in-memory lookup of the old stats.
• StatsRows (new): pure logic that builds and sorts leaderboard rows per mode. It has no Minecraft dependencies, so it can be tested on its own.
• StatsCommand: Brigadier tree now registers [share]/[mode] through a common helper, handlers take a StatsMode, and old data is loaded on server start and cleared on stop.
• README.md: new "Old world stats" section with setup, UUID matching, uuid-map.json, modes and examples.

[Markle98]

opened by error, wanted to push to my fork