NyaDB

Simple JSON "database" for NodeJS.

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All databases are stored as separate JSON files in the NyaDB folder in the project's root directory.

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Node.js Version Requirement

This package requires Node.js version 12.x or higher for compatibility with the features and syntax used in the codebase.

Installation

npm install @decaded/nyadb

Usage

Initialize

const NyaDB = require('@decaded/nyadb');
const nyadb = new NyaDB();

You can pass settings on initialization. More information below.

Creating new database

nyadb.create('test');

Inserting data

const mockDatabase = {
	yellow: ['banana', 'citrus'],
	red: ['apple', 'paprika'],
};
nyadb.set('test', mockDatabase);

Retrieving data

nyadb.get('test');

//  {
//    "yellow": ["banana", "citrus"],
//    "red": ["apple", "paprika"],
//  }

nyadb.getList(); // Returns the names of all existing databases in an array

// ['test']

Checking if database exists

if (nyadb.exists('test')) console.log('Database exists!');

Returns true if test database exists, false otherwise

Clearing a database

nyadb.clear('test');

Clears all data from test database, keeping the file The database will now be an empty object: {}

Renaming a database

nyadb.rename('test', 'newName');

Renames test to newName

Returns false if test doesn't exist or newName already exists

Getting database sizes

// Get size of a single database
const size = nyadb.size('test');
console.log(size);
// { name: 'test', bytes: 1234, formatted: '1.21 KB' }

// Get sizes of multiple databases
const sizes = nyadb.size(['test', 'users']);
console.log(sizes.total.formatted); // '10.5 KB'
console.log(sizes.databases.test.formatted); // '1.21 KB'

// Get sizes of all databases
const allSizes = nyadb.size();
console.log(allSizes.databases); // Object with all database sizes
console.log(allSizes.total.formatted); // Total size of all databases

Checking database size status

const status = nyadb.sizeStatus('test');
console.log(status);
// { name: 'test', bytes: 1234, formatted: '1.21 KB', percentOfLimit: 0.01, status: 'ok' }

const allStatuses = nyadb.sizeStatus();
console.log(allStatuses.total.status); // 'ok', 'warning', 'grace', 'critical', or 'unknown'

Deleting data

nyadb.delete('test');

Configuration Settings

You can customize the behavior of the application by modifying the following settings.

Setting	Default Value	Optional Values	Description
formattingEnabled	true	false	Enable or disable formatting of output.
formattingStyle	tab	space	Choose between using tabs or spaces for indentation.
indentSize	4	Any non-negative integer	Specify the number of spaces for indentation. Only applicable if formattingStyle is set to space.
encoding	utf8	Any valid encoding supported by Node.js	Specify the encoding for file input/output operations.
enableConsoleLogs	false	true	Enable or disable logging output to the console. Errors will be logged regardless of this setting.
logLevel	warn	error, warn, info, debug	Log level for filtering log messages. Only affects logs when enableConsoleLogs is true. The log priority is: error > warn > info > debug
validateInput	true	false	Enable input validation for database names and data. Prevents path traversal and validates data integrity.
useAtomicWrites	true	false	Enable atomic write operations using temp file + rename pattern. Requires validateInput: true (throws error if not met). Prevents possible data corruption during writes.
maxFileSize	100	Any non-negative integer	Maximum file size in megabytes. Warns at 80%, grace threshold at 99%, saves the latest write at 100%, then raises a critical error so the app can stop cleanly.
writeDebounce	10	Any non-negative integer	Debounce delay for write operations in milliseconds. Automatically batches rapid writes for better performance. Set to 0 to disable.

Example

const nyadb = new NyaDB({
	formattingStyle: 'space',
	indentSize: 5,
	enableConsoleLogs: true,
	logLevel: 'info',
});

Security Configuration

Version 5.0.0 enables security features by default:

// Default behavior (recommended)
const nyadb = new NyaDB(); // validateInput: true, useAtomicWrites: true

// Disable security features (not recommended)
const nyadb = new NyaDB({
	validateInput: false, // Allows path traversal - use with caution
	useAtomicWrites: false, // Must be false when validateInput is false
});

⚠ Security Warning: Disabling validateInput may expose your application to path traversal vulnerabilities. Only disable if you have complete control over all database names.

Note

• Changes to these settings will take effect immediately on initialization.
• To return to the default values, simply remove the setting.
• useAtomicWrites requires validateInput: true. Setting useAtomicWrites: true with validateInput: false will throw a configuration error.

Migration Guide

Upgrading from v4.0.0 to v5.0.0

Version 5.0.0 is a major release with breaking changes.

Breaking Changes

1. validateInput defaults to true

   • Database names are validated by default
   • Path traversal attempts are blocked
   • Invalid characters in database names will cause operations to fail

2. useAtomicWrites defaults to true

   • Write operations use atomic file operations by default
   • Prevents data corruption during writes

Migration Steps

If your application uses only valid database names (alphanumeric, dots, dashes, underscores):

• No changes needed! Your code will continue to work.

If your application uses invalid database names (path separators, parent directory references):

// Option 1: Update your database names (recommended)
// Change: nyadb.create('../data/users')
// To: nyadb.create('users')

// Option 2: Explicitly disable validation (not recommended)
const nyadb = new NyaDB({
	validateInput: false,
	useAtomicWrites: false,
});

⚠ Important: If you disable validateInput, you must also set useAtomicWrites: false. Attempting to enable atomic writes without validation will throw a configuration error.

Compatibility with previous versions

NyaDB version 4+ uses a multi-file storage system, where each database is stored as its own JSON file.

⚠	If migrating from version 3.x or earlier, the system will automatically detect an existing database.json file and split it into multiple files.
⚠	This migration is one-way and cannot be reversed. The original database.json file will be backed up as database_backup.json in the NyaDB folder. However, it's recommended to create your own backup before upgrading.

License

This project is licensed under the MIT License. See the LICENSE file for details.

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