S3-music-library NPM

S3MusicLibrary

What is it?

This module helps you turn an S3 bucket into a music library. It provides a convenient API for querying your music data.

Example Usage

const S3MusicLibrary = require("s3-music-library")

const musicLibrary = new S3MusicLibrary(
    AWS_S3_BUCKET,
    AWS_ACCESS_KEY_ID,
    AWS_SECRET_ACCESS_KEY
)

musicLibrary.fetchData()
    .then(() => {
        console.log(musicLibrary.filter({
            artist: "Artist1"
        }))
    })

Setup

First and foremost, you should have an S3 bucket with music data organized in folders according to the following format: s3://[artist]/[album]/[track.(mp3|flac)].

To install the module, execute npm install --save s3-music-library.

Require it at the top of your file, e.g. const S3MusicLibrary = require("s3-music-library").

Instantiate a new S3MusicLibrary instance with the following code:

const s3MusicLibrary = new S3MusicLibrary(
  AWS_S3_BUCKET, 
  AWS_ACCESS_KEY_ID, 
  AWS_SECRET_ACCESS_KEY
)

Source these variables from .env or however you'd like. Always keep them secret and never expose them to the client.

API

.fetchData()

You'll need to fetch data from your S3 bucket before doing anything else. Because this request is asynchronous, your data queries will fall within a .then() callback function.

fetchData calls _initializeStore, which, in turn, calls _parseListFormat and _parseAlbumFormat. These methods populates the s3MusicLibrary object's store with your music data in listFormat and albumFormat.

.filter(queryObject)

This method call's the lodash _.find method on the library instance's _store.albumFormat. Its result set only contains exact matches.

Example usage:

s3MusicLibrary.filter({
  artist: "Artist1"
})`

.search(key)

This method compares a string search key against all URLs in the instance's _store.listFormat.

s3MusicLibrary.search("artist1")`

Store

After the raw data is retrieved from S3, it's parsed and saved in the S3MusicLibrary object's store.

._store.listFormat

This returns a list of every track in your bucket, structured as follows:

{
    url: "Artist1/Album1/Track1.mp3"
    artist: "Artist1",
    album: "Album1",
    track: "Track1.mp3"
}

._store.albumFormat

This returns a list of albums structured as follows:

{ 
    artist: "Artist1",
    album: "Album1",
    tracks: [
        { title: "Track1", url: "Artist1/Album1/Track1.mp3" },
        { title: "Track2", url: "Artist1/Album1/Track2.mp3" },
        { title: "Track3", url: "Artist1/Album1/Track3.mp3" },
    ],
}

._store.artistFormat

This returns a list of artists structured as follows:

{ 
    artist: "Artist1",
    albums:[ 
        {
            artist: "Artist1"
            album: "Album1",
            tracks: [
                { title: "Track1", url: "Artist1/Album1/Track1.mp3" },
                { title: "Track2", url: "Artist1/Album1/Track2.mp3" },
                { title: "Track3", url: "Artist1/Album1/Track3.mp3" },
            ]
        },
        {
            artist: "Artist1"
            album: "Album2",
            tracks: [
                { title: "Track1", url: "Artist1/Album2/Track1.mp3" },
                { title: "Track2", url: "Artist1/Album2/Track2.mp3" },
                { title: "Track3", url: "Artist1/Album2/Track3.mp3" },
            ]
        },
    ]
}

In general, it's better to access data in the object's store through its getters. These are detailed below.