npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

sepatree

v1.0.0

Published

SepaTree data structure in JS

Downloads

3

Readme

Description

With this package you can manipulate and interpret SepaTree data via SepaTreeNode and SepaTreeFork abstractions.

Exported Functions and Classes

You can import the followings directly from sepatree:

  • SepaTreeNode # class abstracting and manipulating SepaTree Node data
  • SepaTreeFork # class abstracting and manipulating SepaTree Fork data
  • checkForSeparator # checks for separator character in the node and its descendants prefixes
  • loadAllNodes # loads all SepaTree nodes recursively from the storage
  • equalNodes # checks whether the two given SepaTree Nodes objects are equal in the in-memory abstraction level
  • Utils # all used utility functions in the library. Mostly operating on Uint8Array objects.
  • types* # not callable, referring all types exported and reachable from the index

Basic usage

Construct SepaTree

import { initManifestNode, Utils } from 'sepatree'

const node = initManifestNode()
const address1 = Utils.gen32Bytes() // instead of `gen32Bytes` some 32 bytes identifier that later could be retrieved from the storage
const address2 = Utils.gen32Bytes()
const address3 = Utils.gen32Bytes()
const address4 = Utils.gen32Bytes()
const address5 = Utils.gen32Bytes()
const path1 = new TextEncoder().encode('path1/valami/elso')
const path2 = new TextEncoder().encode('path1/valami/masodik')
const path3 = new TextEncoder().encode('path1/valami/masodik.ext')
const path4 = new TextEncoder().encode('path1/valami')
const path5 = new TextEncoder().encode('path2')
node.addFork(path1, address1)
node.addFork(path2, address2, { vmi: 'elso' }) // here 'vmi' is a key of metadata and 'elso' is its value
node.addFork(path3, address3)
node.addFork(path4, address4, { vmi: 'negy' })
node.addFork(path5, address5)
node.removePath(path3)
// (...)

SepaTree Storage Operations

import { SepaTreeNode } from 'sepatree'

const node = new SepaTreeNode()
// here `reference` parameter is a `Reference` type which can be a 32 or 64 bytes Uint8Array
// and `loadFunction` is a [loadFunction: async (address: Reference): Promise<Uint8Array>] typed function
// that returns the serialised raw data of a SepaTreeNode of the given reference
await node.load(loadFunction, reference)

// Manipulate `node` object then save it again
// (...)

// save into the storage with a storage handler [saveFuncion: async (data: Uint8Array): Promise<Reference>]
const reference = await node.save(saveFunction)

node binary format

The following describes the format of a node binary format.

┌────────────────────────────────┐
│ hash("sepatree:0.1") <31 byte> │
├────────────────────────────────┤
│     refBytesSize <1 byte>      │
├────────────────────────────────┤
│       entry <32/64 byte>       │
├────────────────────────────────┤
│ ┌────────────────────────────┐ │
│ │           Fork 1           │ │
│ ├────────────────────────────┤ │
│ │            ...             │ │
│ ├────────────────────────────┤ │
│ │           Fork N           │ │
│ └────────────────────────────┘ │
└────────────────────────────────┘

Fork

┌───────────────────┬───────────────────────┬──────────────────┐
│ nodeType <1 byte> │ prefixLength <1 byte> │ prefix <30 byte> │
├───────────────────┴───────────────────────┴──────────────────┤
│                    reference <32/64 bytes>                   │
│                                                              │
└──────────────────────────────────────────────────────────────┘

Fork with metadata

┌───────────────────┬───────────────────────┬──────────────────┐
│ nodeType <1 byte> │ prefixLength <1 byte> │ prefix <30 byte> │
├───────────────────┴───────────────────────┴──────────────────┤
│                    reference <32/64 bytes>                   │
│                                                              │
├─────────────────────────────┬────────────────────────────────┤
│ metadataBytesSize <2 bytes> │     metadataBytes <varlen>     │
├─────────────────────────────┘                                │
│                                                              │
└──────────────────────────────────────────────────────────────┘

Testing

The testing needs running Bee client node for integration testing. You can set BEE_POSTAGE environment variable with a valid Postage batch or the test will create one for you.

The default value of the Bee Debug API endpoint is http://localhost:1635. If your address diverges from that, please, set BEE_DEBUG_API_URL system environment variable with yours.

To run test execute

npm run test