ADOFAI

A zero-dependency JavaScript/TypeScript library for parsing, editing, and exporting ADOFAI level files. Fully browser-compatible.

Features

• Multiple Parsers — StringParser, BufferParser, ArrayBufferParser, LargeFileParser for incremental large-file parsing
• Level Management — load, edit, and export .adofai files with full tile and event access
• Typed Events — 57 typed event interfaces covering all ADOFAI event types
• Shared Types — const enums and utility types for ADOFAI-specific values (angles, hitboxes, filters, etc.)
• PathData Conversion — convert between pathData string and angleData array
• Effect Filtering — preset and custom event filtering (clear effects, keep/exclude events)
• Precompute Mode — batch-process and cache progress events for rendering pipelines
• Lightweight Data — memory-efficient tile data extraction for large levels

Installation

npm install adofai
# or
yarn add adofai
# or
pnpm add adofai

Import

ESM:

import * as adofai from 'adofai';
import { Level, Parsers, Types, Events, Structure } from 'adofai';

CommonJS:

const adofai = require('adofai');

Subpath imports:

import { StringParser } from 'adofai/parser/string';
import { BufferParser } from 'adofai/parser/buffer';
import { ArrayBufferParser } from 'adofai/parser/array-buffer';
import * as Types from 'adofai/types';
import * as Events from 'adofai/event';

---

Parsers

Four parsers handle different input formats. All are zero-dependency and browser-compatible.

StringParser

Parses ADOFAI JSON from a string. Handles non-standard formatting (trailing commas, raw newlines in strings).

import { StringParser } from 'adofai';

const parser = new StringParser();
const data = parser.parse(`{ "angleData": [...], "settings": {...}, "actions": [...] }`);

BufferParser (Uint8Array)

Parses ADOFAI JSON directly from a Uint8Array binary stream using a byte-level state machine. No intermediate string conversion, handles BOM stripping automatically.

import { BufferParser } from 'adofai';

const parser = new BufferParser();
const u8 = new Uint8Array(await file.arrayBuffer());
const data = parser.parse(u8);

ArrayBufferParser

Accepts ArrayBuffer or string. Handles BOM stripping, trailing comma normalization, and UTF-8 decoding.

import { ArrayBufferParser } from 'adofai';

const parser = new ArrayBufferParser();
const buffer = await response.arrayBuffer();
const data = parser.parse(buffer);

LargeFileParser

Memory-optimized parser for large .adofai files. Scans raw bytes to find JSON root properties, then parses sections incrementally without loading the entire file into a JS string. Ideal for files with massive angleData or action arrays.

import { LargeFileParser } from 'adofai';

const parser = new LargeFileParser((stage, percent) => {
  console.log(`[${stage}] ${percent}%`);
}, {
  skipLargeActions: false, // skip actions if > 100MB
  maxActions: 0            // limit parsed actions count
});

const result = parser.parse(arrayBuffer);
// result: { settings?, angleData?, pathData?, actions?, decorations? }

Key behaviors:

• < 50MB — sections are fully JSON.parsed normally.
• > 50MB — actions is parsed incrementally (each object parsed independently).
• > 100MB — actions can be skipped entirely via skipLargeActions: true.
• Any size — angleData is always parsed incrementally (number-by-number).
• BOM is automatically stripped.

---

Level

The Level class is the core data structure. It accepts ADOFAI file content (string, object, ArrayBuffer, Uint8Array, or Buffer) and provides tile management and export.

Create & Load

import { Level } from 'adofai';

// From string
const level = new Level(adofaiJsonString);
await level.load();

// With custom parser provider
const level = new Level(rawData, bufferParser);
await level.load();

// From already-parsed object
const level = new Level({
  angleData: [...],
  settings: { ... },
  actions: [...],
  decorations: [...]
});
await level.load();

// Event-based loading
level.on('load', () => {
  console.log('Level loaded:', level.tiles.length, 'tiles');
});
level.load();

// Progress events
level.on('parse:progress', (event) => {
  // { stage: 'relativeAngle', current: 500, total: 1000, percent: 50 }
  console.log(`${event.stage}: ${event.percent}%`);
});

Progress stages: start → pathData | angleData → relativeAngle → tilePosition → complete

Data Model Overview

After loading, the level data is organized into two layers:

┌──────────────────────────────────────────┐
│  Source Data (read-only initial values)   │
│  level.angleData       — raw angle array  │
│  level.actions         — flat event list  │
│  level.__decorations   — flat deco list   │
│  level.settings        — level settings   │
├──────────────────────────────────────────┤
│  Working Data (primary operation target)  │
│  level.tiles           — Tile[]          │
└──────────────────────────────────────────┘

level.tiles is where all data operations happen. The source arrays (angleData, actions, decorations) are initial inputs and are not kept in sync when you modify tiles. When you export, angleData, actions, and decorations are reconstructed from level.tiles.

Tile Structure

Each tile in level.tiles has the following structure:

interface Tile {
  direction?: number;       // Original angle data value (incl. 999)
  angle?: number;           // Computed relative angle (for rendering)
  _lastdir?: number;        // Previous tile's direction
  twirl?: number;           // Accumulated twirl count up to this tile
  actions: ActionData[];    // Events belonging to this tile
  addDecorations?: ActionData[]; // Decorations on this tile
  position?: number[];      // Computed [x, y] position
  extraProps?: Record<string, any>; // Extra computed data (angle1, angle2, cangle)
}

Working with Tiles

Read tile data:

// Total tile count
level.tiles.length;

// Access a specific tile
const tile = level.tiles[42];
tile.direction;       // raw angle value
tile.angle;           // relative angle
tile.actions;         // events on this tile
tile.addDecorations;  // decorations on this tile
tile.twirl;           // twirl count
tile.position;        // [x, y] (after calculateTilePosition)

Modify tiles:

// Append a new tile
level.floorOperation({ type: 'append', direction: 180 });

// Insert at specific index
level.floorOperation({ type: 'insert', direction: 90, id: 10 });

// Delete a tile
level.floorOperation({ type: 'delete', id: 10 });

Query events across tiles:

// Find all tiles with a specific event type
const results = level.filterActionsByEventType('Flash');
// returns { index: number, action: ActionData }[]

// Get events at a specific tile index
const { count, actions } = level.getActionsByIndex('MoveTrack', 5);

Calculate Tile Positions

Populates tile.position and tile.extraProps for all tiles.

const positions = level.calculateTilePosition();
// returns number[][] — [x, y] for each tile including endpoint

// After this call, each tile.position is set
level.tiles[5].position;  // [x, y]
level.tiles[5].extraProps; // { angle1, angle2, cangle }

Effect Filtering (operates on tiles)

All effect operations modify level.tiles in-place.

import { Presets } from 'adofai';

// Using a preset
level.clearEffect('preset_noeffect');

// Custom filter — keep only specific events
level.clearEvent({ type: 'include', events: ['SetSpeed', 'Twirl'] });

// Custom filter — exclude specific events
level.clearEvent({ type: 'exclude', events: ['Flash', 'Bloom'] });

// Clear all decorations from all tiles
level.clearDeco();

Export (reconstructs from tiles)

// Export as formatted ADOFAI JSON string
const str = level.export('string', 0, true);
// fs.writeFileSync('output.adofai', str);

// Export as object
const obj = level.export('object', 0, true);
// { angleData, settings, actions, decorations }
// All three arrays are reconstructed from level.tiles

Event System

// Listen to lifecycle events
const guid = level.on('load', (level) => { /* ... */ });

// Remove listener by GUID
level.off(guid);

// Trigger custom events
level.trigger('custom:event', data);

---

Types

Shared ADOFAI-specific types and const enums, exported via Types.* or adofai/types.

Const Enums

import { Types } from 'adofai';

Types.TextAnchor.UpperLeft       // 'UpperLeft'
Types.Hitbox.None                // 'None'
Types.FilterType.Bloom           // 'Bloom'
Types.FlashStyle.Flash           // 'Flash'
Types.RelativeTo.Tile            // 'Tile'
Types.TargetPlanet.All           // 'All'
Types.AngleCorrectionDir.CW      // 'CW'
Types.InputEventState.Subscribe  // 'Subscribe'
Types.InputEventTarget.Pressed   // 'Pressed'
Types.Condition.IfPassed         // 'IfPassed'
Types.BgDisplayMode.FitToScreen  // 'FitToScreen'
Types.BgShapeType.Circle         // 'Circle'
Types.HitsoundType.Kick          // 'Kick'
Types.HoldMidSoundTimingRelativeTo.Start // 'Start'

Utility Types

Types.Vec2                       // [number, number]
Types.ABoolean                   // boolean | 'Enabled' | 'Disabled' | 'true' | 'false'
Types.TileReference              // [number, TileReferenceType]
Types.TileReferenceType          // 'ThisTile' | 'Start' | 'End'
Types.Vec2Like                   // [number, number] | { x: number; y: number }

Utility Functions

// Evaluate ABoolean values
Types.isEventEnabled(value, defaultValue);  // boolean

// Resolve relative tile references
Types.resolveTileReference([2, 'End'], currentTileId, totalTiles);
// = totalTiles - 1 + 2

Types.resolveTileReference([-1, 'ThisTile'], 5, 100);
// = 4

// Normalize ADOFAI position formats (array and object forms)
Types.normalizeVec2([3, 5]);           // [3, 5]
Types.normalizeVec2({ x: 3, y: 5 });   // [3, 5]

---

PathData

Convert pathData strings (e.g. "REJW") into angleData arrays.

import { pathData } from 'adofai';

// Character → angle mapping table
pathData.pathDataTable;
// { R: 0, p: 15, J: 30, E: 45, T: 60, ... }

// Convert path string to angle numbers
const angleData = pathData.parseToangleData("REJW");
// [0, 45, 30, 165]

---

Event Interfaces

57 typed event interfaces covering all ADOFAI event types. Each extends AdofaiEvent with floor and eventType fields.

import type { Events } from 'adofai';

// Each event type has a matching interface:
const flash: Events.Flash = {
  floor: 0,
  eventType: 'Flash',
  duration: 1,
  color: 'ffffff',
  flashStyle: Types.FlashStyle.Flash,
  opacity: 100,
};

const setSpeed: Events.SetSpeed = {
  floor: 0,
  eventType: 'SetSpeed',
  speed: 1.0,
};

const moveTrack: Events.MoveTrack = {
  floor: 5,
  eventType: 'MoveTrack',
  duration: 4,
  positionOffset: [0, 3],
  rotation: 90,
  easing: 'Linear',
};

Full list of event types: SetSpeed, Twirl, Checkpoint, MoveCamera, CustomBackground, ChangeTrack, ColorTrack, AnimateTrack, RecolorTrack, MoveTrack, SetText, Flash, SetHitsound, SetFilter, SetFilterAdvanced, SetPlanetRotation, HallOfMirrors, ShakeScreen, MoveDecorations, PositionTrack, RepeatEvents, Bloom, Hold, SetHoldSound, SetConditionalEvents, ScreenTile, ScreenScroll, EditorComment, Bookmark, CallMethod, AddComponent, PlaySound, MultiPlanet, FreeRoam, FreeRoamTwirl, FreeRoamRemove, Pause, AutoPlayTiles, Hide, ScaleMargin, ScaleRadius, Multitap, TileDimensions, KillPlayer, ScalePlanets, SetFloorIcon, AddDecoration, AddText, AddObject, SetObject, SetDefaultText, SetFrameRate, AddParticle, SetParticle, EmitParticle, SetInputEvent.

---

---

Effect Presets

Advanced: Precompute Mode

For rendering pipelines that need deterministic event replay. Instead of firing progress events during load, events are cached and can be polled.

level.enablePrecomputeMode();
await level.load();
level.calculateTilePosition();

const events = level.getPrecomputedEvents();
// { start: [...], pathData: [...], angleData: [...], ... }

// Get events up to a specific progress percentage
const at50 = level.getEventsAtPercent(50);

---

Advanced: Lightweight Tile Data

For large levels where storing full Tile[] objects is memory-prohibitive. Precomputes only rendering-essential data.

// Precompute lightweight data (angles + positions + twirl flags)
level.precomputeLightweight();

// Access the compact data
const data = level.getLightweightData();
// { totalTiles, angles: number[], positions: [number,number][], twirlFlags: boolean[] }

// Get a range of tiles (chunked access)
const chunk = level.getLightweightDataRange(0, 100);
// { angles: [...], positions: [...], twirlFlags: [...] }

// Get single tile render data
const tile = level.getTileRenderData(42);
// { angle, position, hasTwirl }

---

Structure Interfaces

Available via adofai/structure:

import type { AdofaiEvent, LevelOptions, Tile, ParseProgressEvent } from 'adofai/structure';

// AdofaiEvent: { floor: number, eventType: string, [key: string]: any }
// LevelOptions: { pathData?: string, angleData?: number[], actions, settings, decorations }
// Tile: { direction?, angle?, actions, addDecorations?, position?, ... }
// ParseProgressEvent: { stage, current, total, percent, data? }

---

Package Exports

Import path	Contents
adofai	Main: Level, Parsers, Types, Events, Structure, Presets, pathData
adofai/parser	Parser classes
adofai/parser/string	StringParser
adofai/parser/buffer	BufferParser
adofai/parser/array-buffer	ArrayBufferParser
adofai/types	Types (const enums, utilities)
adofai/event	All event type interfaces
adofai/structure	Core interfaces (LevelOptions, Tile, etc.)
adofai/filter	Filter presets
adofai/filter/effect-processor	Low-level effect processor
adofai/pathdata	PathData conversion table
adofai/types	Utility types and functions

---

License

BSD-3-Clause