Fssentials is a production-ready moderation and admin utilities plugin for Paper (Folia-aware). This document enumerates every feature implemented in the current codebase so server operators can configure, use, and extend the plugin confidently.

---

High-level Overview

• Folia-friendly scheduler utilities for safe async/global/entity dispatch (FoliaScheduler).
• Full-featured punishment system with persistent YAML storage and temporary punishments.
• IP-locking (per-account allowed IP entries + login-blocking) with admin commands and bypass permission.
• Maintenance subsystem with whitelist, MOTD sets, scheduling/timers and join notifications.
• Broadcast/announcement system using MiniMessage titles with optional configurable sound.
• Vanish and admin protections for hidden staff members.
• Inventory viewing and editing (InvSee) with Folia-safe snapshot/restore behavior.
• Central MessageService for configurable chat messages and prefix handling.

---

Features (exhaustive)

Punishment System

• Supported punishment types: KICK, BAN, MUTE, WARN, NOTE, IP_BAN.
• Supports permanent and temporary punishments. Temporary durations parse via TimeParser and server-configurable time-layout tokens (e.g. #default).
• Each punishment stores: id, type, target UUID/name/ip, actor, reason, createdAt, expiresAt, active flag and silent flag.
• Storage: persisted to punishments.yml via YamlPunishmentStorage when storage.persistence-enabled is true.
• Management: create, deactivate (unpunish), change reason, delete record, list history, view active punishments, page helper utilities (PunishmentManager).
• Expiration: scheduled expiration runs on Folia async scheduler and notifies staff when punishments expire.

Commands (handled by CommandRouter):

• kick <player> <reason...> — immediate kick with enforcement message.
• ban <player> <reason...> — permanent ban (kicks online target).
• mute <player> <reason...> — mute (blocks chat via PunishmentListener).
• warn <player> <reason...> — adds a warn record; notifies target if online.
• note <player> <note...> — internal note record.
• banip <player|ip> <reason...> — IP ban (kicks matching IPs).
• tempban/tempmute/tempwarn/tempipban <player|ip> <duration> <reason...> — temporary punishments.
• unban/unmute/unwarn/unnote/unpunish <id|player> — remove punishments.
• change-reason <id> <new reason> — edit a punishment's reason.
• warns <player> / notes <player> — list warns/notes.
• check <player> — show UUID, IP, ban/mute status, counts.
• banlist [page] — list active bans (paginated).
• history <player> [page] — view player's punishment history (paginated).

Notes:

• Commands support a -s prefix to make an action silent (announce only to staff with the configured silent notify permission).
• Reason layouts can be referenced with @layoutKey to reuse predefined layouts from config.yml (layouts.).
• Time-layout tokens (e.g. #default) map to values in time-layouts config.

IP Locking

• Per-account IP lock storage in ip-locks.yml (IpLockManager).
• Admin commands to set, remove, change, and check an account's allowed IP.
• Normalizes IPs using Java networking APIs; invalid inputs are rejected.
• Login flow hooks: pre-login collects attempted IP and if mismatch is found the player is kicked (unless they have bypass permission).
• Configurable: ip-lock.enabled, ip-lock.log-blocked-attempts, ip-lock.kick-message.

Maintenance Mode

• Enable/disable maintenance mode programmatically or via commands.
• Whitelist management (add/remove/list) for players allowed during maintenance.
• MOTD sets: multiple message sets supported and editable using /maintenance motd and setmotd.
• Scheduling/timers: starttimer, endtimer, schedule, aborttimer to schedule enable/disable automatically (MaintenanceTimer).
• Join notifications: staff with notify permission receive join-attempt notifications during maintenance.
• Configurable messages and bypass/notify permissions via MaintenanceConfig.

Maintenance commands (via maintenance command):

• maintenance on|off|reload
• maintenance add <player> / remove <player> / whitelist
• maintenance starttimer <minutes> / endtimer <minutes> / schedule <startMinutes> <durationMinutes> / aborttimer
• maintenance motd / maintenance setmotd <index> <line> <message>

Broadcast / Announcements

• /broadcast <title> [subtitle] — sends a full-screen title to all players using MiniMessage formatting.
• Supports splitting title/subtitle by | or heuristics; configurable sound (announcements.sound.* in config).

Vanish & Admin Tools

• Toggle vanish with /vanish (visibility handled by VanishService).
• AdminToolsListener protects vanished staff from being interacted with or damaged.
• Vanish state is reapplied on join for session-owned vanished players.

InvSee (Inventory View/Edit)

• /invsee <player> opens a 54-slot GUI snapshot of the target player's inventory (uses InvseeInventoryHolder).
• Snapshot and restore are Folia-safe: inventory cloning happens on the target's entity scheduler and GUI open on the viewer's entity scheduler.
• Viewer edits are written back on close (invsee allows editing of player storage, armor, off-hand slots as described in the GUI layout).

Message Service & Localization

• MessageService loads messages.yml from the plugin folder; messages use a prefix and support placeholder replacement via MessageService.get(key, placeholders).
• Error/usage/enforcement messages are all configurable in messages.yml and config.yml.

Folia Scheduler Compatibility

• FoliaScheduler centralizes Folia-friendly task dispatch: runAsync, runAsyncTimer, runGlobal, runAtEntity.
• All file I/O and long-running work is dispatched async; player-specific operations run on the player's entity scheduler.

Storage Files Created/Used

• punishments.yml — persisted punishment records (via YamlPunishmentStorage).
• ip-locks.yml — per-account IP lock entries.
• messages.yml — plugin messages loaded by MessageService (copied from plugin jar to data folder on first run).

---

Commands (complete list registered at runtime)

• kick, ban, mute, warn, note, banip
• tempban, tempmute, tempwarn, tempipban
• unban, unmute, unwarn, unnote, unpunish
• change-reason, warns, notes, check, banlist, history
• fssentials, systemprefs, vanish, offlinetp, playerlist, punishment, invsee
• maintenance (separately registered with its own executor)
• broadcast, iplock (separately registered)

Refer to plugin.yml for the exact help/usage lines; fssentials command prints configurable help-lines from config.yml.

---

Permissions (used in code)

• fssentials.punish.kick — kick players
• fssentials.punish.ban / fssentials.punish.tempban — ban players
• fssentials.punish.mute / fssentials.punish.tempmute — mute players
• fssentials.punish.warn / fssentials.punish.tempwarn — warn players
• fssentials.punish.banip / fssentials.punish.tempipban — IP ban
• fssentials.punish.unpunish — remove punishments
• fssentials.punish.change-reason — edit punishment reason
• fssentials.view.banlist / fssentials.view.history / fssentials.view.check / fssentials.view.playerlist — view lists/check info
• fssentials.invsee — view and edit player inventories
• fssentials.vanish — toggle vanish
• fssentials.admin.reload — reload plugin
• fssentials.admin.systemprefs — view system prefs
• fssentials.maintenance.admin — full maintenance administration
• maintenance bypass/notify permissions are configurable (defaults shown in MaintenanceConfig).
• IP-locking bypass permission: plugin.iplock.bypass (constant in IpLockManager).

Note: the plugin uses permission checks liberally; ensure your server's permission system maps the nodes to the desired roles.