GriefPrevention v17.3.5 (Paper 26.1.2 Experimental)

Highlights

• Experimental support for Paper 26.1.2 (calendar-versioned Paper builds running on Java 25).
• Migrated deprecated PlayerLoginEvent to AsyncPlayerPreLoginEvent to comply with Paper 26's re-configuration API requirements.
• Thread-safe IP ban tracking for async login handling.

Paper 26.1.2 Compatibility

This release targets Paper's new calendar-versioned experimental builds (26.1.2.build.18-alpha) which require Java 25. The plugin has been verified to load and run correctly on:

• Paper: 26.1.2.build.18-alpha (Implementing API version 26.1.2.build.18-alpha)
• Java: OpenJDK 25.0.2+10-LTS (Temurin)

Event System Migration

Paper 26 deprecates listening to PlayerLoginEvent because it fires between the login and configuration phases, blocking Paper's re-configuration APIs. This release migrates to AsyncPlayerPreLoginEvent:

• Login cooldown and spam protection now run asynchronously before the configuration phase.
• IP address recording moved to PlayerJoinEvent to keep DataStore writes on the main thread.
• Smart-ban IP tracking preserved: banned accounts are still recorded for IP-based auto-banning.

Thread Safety Improvements

• tempBannedIps changed from ArrayList to CopyOnWriteArrayList to safely handle writes from the async login thread while main-thread handlers iterate the list.

Technical Changes

• paper-api dependency bumped to 26.1.2.build.18-alpha.
• Removed deprecated PlayerLoginEvent and PlayerLoginEvent.Result imports.
• Added AsyncPlayerPreLoginEvent import and handler (onAsyncPlayerPreLogin).
• Added offline-safe hasSpamBypass(UUID) helper for cooldown bypass checks (falls back to op status; permission-based bypass will be restored in a future update).

Notes

• This is an experimental build for Paper 26.1.2. For production servers on Paper 1.21.x, use the standard v17.3.5 release.
• The api-version in plugin.yml remains "1.21" for backward compatibility.
• All 108 unit tests pass on Java 25.
• No changes to claim mechanics, permissions, or commands — this is purely a compatibility update.

GriefPrevention v17.3.5

Highlights

• Major shaped-claim performance pass: shaped edits and large shaped path creation are now viable at sizes that previously stalled or failed the geometry layer.
• Reduced per-edit CPU cost for nib growth, merges, and boundary tracing on claims with long orthogonal perimeters.

Shaped Claim Performance

• Replaced the per-cell scan used to measure shaped claims with a closed-form count derived from the boundary polygon, so measuring a shaped claim is now O(edges) instead of O(width * height).
• Large shaped paths (winding corridors, perimeter walls, sprawling multi-segment outlines) can now be created and resized without the prior cost wall, because measurement no longer grows with the claim's bounding box.
• Added a cached boundary polygon on each claim so repeated measurement, containment, and overlap queries within the same edit no longer rebuild and re-validate the polygon from scratch.

Technical Improvements

• New OrthogonalPolygon.cellCount() computes the number of integer-lattice cells inside or on the boundary of a shaped claim directly from its corners, using Pick's theorem (A + B/2 + 1) with the shoelace formula for the area A and the summed Manhattan edge lengths for the boundary count B. This is exact for axis-aligned polygons with integer corners, which is always the case for shaped claims.
• Claim.getClaimBlocks() now calls cellCount() instead of iterating every (x, z) in the bounding box and calling containsColumn.
• DataStore.polygonCellArea(...) no longer builds a throwaway measuring claim and runs a per-cell contains(...) test; it also delegates to cellCount().
• Added a transient cachedBoundaryPolygon on Claim, invalidated on shape mutation and on the copy constructor, and populated from the already-validated polygon in setShapedCorners so getBoundaryPolygon() does not re-validate on first access.

Notes

• This release is the recommended base for GPExpansion v1.0.4, whose /claimmap performance work depends on the shaped-claim geometry speedups shipped here.
• Behavior of existing shaped edits is unchanged; only their cost and upper size limits have improved.

GriefPrevention v17.3.4

Highlights

• Fixed /claimexplosions not actually enabling TNT explosions in claim.

GriefPrevention v17.3.3

Highlights

• Fixed /witherexplosions being ignored when /claimexplosions was enabled.
• Wither skull explosions now correctly respect the separate wither explosion setting.

GriefPrevention v17.3.2

Highlights

• Fixed a /permissiontrust regression where trusted players could end up with edit-level abandon behavior instead of only trust-management access.
• Continued the shaped-claim editor stabilization pass, especially around nib merges, corner reconnects, and map-driven geometry updates.
• Updated default /claim create layout math so editor-integrated creation flows line up to a true 10x10 starter claim instead of drifting between 9x9 and 11x11.

Shaped Claims And Resizing

• Fixed several shaped resize edge cases where notch and nib edits could:
  • expand an entire face instead of the intended local segment,
  • collapse into a tiny invalid local loop,
  • fail to reconnect to the main claim body during merge-style edits,
  • or report a successful merge while leaving inconsistent geometry.
• Improved polygon union and subtraction tracing used by the editor stack so map-driven claim edits can resolve the final claim body more reliably.
• Tightened claim creation and resize alignment for editor-driven workflows so boundary math stays consistent between command creation, shovel resizing, and external map tools.

Bug Fixes

• Fixed /permissiontrust incorrectly allowing players to abandon claims they did not own.
• Fixed starter claim sizing so /claim create now produces the expected exact square footprint for editor integrations.
• Fixed several shaped-resize regressions that could mis-handle corner fills, side merges, or segment-local edits.

Technical Improvements

• Added cleaner polygon merge/subtract handling for occupied-cell based claim editing.
• Improved boundary tracing and reconnect selection for complex orthogonal shaped claims.
• Better failure handling for unsupported geometry outcomes, such as edits that would split a claim into disconnected pieces.

Notes

• This release is the recommended base for the updated GPExpansion v1.0.3 map editor and resize GUI work.
• When a shaped edit cannot be represented safely, it now fails cleanly instead of silently approximating a broken result.