NoWorldFlood

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Fixes the new popular world-flooding flying machine

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<h1 align="center">
  <img src="https://github.com/user-attachments/assets/b1d91e9b-1654-47a9-8db2-6da93f7e5f88" alt="NoWorldFlood" width="32" height="32"/>
  NoWorldFlood
  <img src="https://github.com/user-attachments/assets/b1d91e9b-1654-47a9-8db2-6da93f7e5f88" alt="NoWorldFlood" width="32" height="32"/>
</h1>

[![Paper](https://img.shields.io/badge/Paper-Supported-brightgreen)](https://papermc.io/)
[![Folia](https://img.shields.io/badge/Folia-Supported-brightgreen)](https://papermc.io/software/folia)
![Supported Versions](https://img.shields.io/badge/Versions-1.21+-green)

[![Modrinth](https://img.shields.io/badge/Modrinth-Download-00AF5C?logo=modrinth)](https://modrinth.com/plugin/noworldflood)
[![Hangar](https://img.shields.io/badge/Hangar-Download-blue)](https://hangar.papermc.io/RVSkeLe/NoWorldFlood)
[![SpigotMC](https://img.shields.io/badge/SpigotMC-Download-ED8106?logo=spigotmc)](https://www.spigotmc.org/resources/noworldflood.137656/)
[![bStats](https://img.shields.io/badge/bStats-Statistics-blue)](https://bstats.org/plugin/bukkit/NoWorldFlood/33020)

NoWorldFlood is a Paper and Folia plugin that protects worlds from flooding caused by machines abusing moving waterlogged blocks.

Some piston machines can move waterlogged blocks in ways that repeatedly create or spread water, eventually flooding large areas or an entire world. This plugin watches piston extension and retraction, then cancels movement using the configured detection mode.

## How it works

NoWorldFlood has two detection modes.

`movement-tracking` tracks the net movement of waterlogged blocks over time:

- `EAST -> EAST -> EAST` accumulates movement and is blocked.
- `EAST -> WEST -> EAST -> WEST` cancels itself out and is not blocked.
- `SOUTH -> EAST -> SOUTH -> EAST` accumulates diagonal movement and is blocked.

This is meant to avoid false flags from back-and-forth contraptions while still catching machines that steadily transport waterlogged blocks across the world.

`waterlogged-blocks` is the aggressive fallback. It cancels any piston movement that includes a waterlogged block. Use this if movement tracking misses an exploit, but expect more false positives.

## Commands

```text
/noworldflood status
/noworldflood reload
/noworldflood enable
/noworldflood disable
/noworldflood debug
```

`enable` and `disable` are runtime-only. `reload` reloads `config.yml`, including the `enabled` setting.
`debug` lists the currently tracked waterlogged block positions.

## Settings

`enabled` controls protection at startup and after `/noworldflood reload`:

```yaml
enabled: true
```

Detection and logging are controlled with:

```yaml
detection:
  mode: movement-tracking
  movement-threshold: 3

logging:
  blocked-pistons: true
```

## Statistics

NoWorldFlood uses **bStats** to collect completely anonymous usage statistics.

[![bStats](https://bstats.org/signatures/bukkit/NoWorldFlood.svg)](https://bstats.org/plugin/bukkit/NoWorldFlood/33020)

NoWorldFlood

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