spotify-resolve

You pass it Spotify URIs (e.g. spotify:album:3HJ4C0poaEMEg8u56sfr02). It gives you back Spotify entities. It figures out what endpoint to call to call it, so you don't have to.

It will also batch resource ids of a given type together so as to make as few requests as possible, while also respecting resource limits per API request.

Installation

npm install spotify-resolve

Usage

spotify-resolve exports a constructor that creates a function you can use to resolve URIs:

var request = require('request');
var spResolve = require('spotify-resolve')({
  request: request
});
spResolve('spotify:album:3HJ4C0poaEMEg8u56sfr02', logResult);

function logResult(error, result) {
  if (error) {
    console.log(error);
  }
  else {
    console.log(JSON.stringify(result, null, '  '));
  }
}

This will print out a Spotify album object.

To get many URIs resolved:

spResolve(
  [
    'spotify:track:6TiCkACNmrC80bCJ3K2a4U',
    'spotify:track:3lOHeRgeA3oCyxxHl6sVsa',
    'spotify:track:41uWkGOCpz0CA5vJ1nIKI6',
    'spotify:album:3HJ4C0poaEMEg8u56sfr02'
  ],
  logResult
);

This will print out an array of three Spotify track objects and one Spotify album object.

You can also pass a bearerToken opt to the constructor to have it use an access token in API calls.

async/await

If you'd like to use it with async/await, grab errorback-promise and use it to call spResolve like so:

var ep = require('errorback-promise');

var r = await ep(spResolve, [ 'spotify:track:6TiCkACNmrC80bCJ3K2a4U', 'spotify:track:3lOHeRgeA3oCyxxHl6sVsa']);
if (r.error) {
  console.log(error);
} else {
  // Use resolved objects in r.values.
}

Plug in your own request library

By default, it uses request to make http calls. If you want to specify a different http request function to handle that, you can by passing it to the constructor. Like request, your function needs to:

- Take an opt object that has `url` and `method` properties.
- Take a callback that will be passed an error, a response object (can be null), and a parsed JSON body.

Example:

var http = require('http');

var SpotifyResolve = require('spotify-resolve');
var spResolve = SpotifyResolve({
  request: myRequestFunction
});

spResolve(
  [
    'spotify:track:6TiCkACNmrC80bCJ3K2a4U',
    'spotify:track:3lOHeRgeA3oCyxxHl6sVsa',
    'spotify:track:41uWkGOCpz0CA5vJ1nIKI6',
    'spotify:album:3HJ4C0poaEMEg8u56sfr02'
  ],
  logResult
);

function myRequestFunction(opts, callback) {
  var responseString = '';

  var httpOpts = url.parse(opts.url);
  httpOpts.method = opts.method;

  var req = https.request(httpOpts, handleResponseEvents);
  req.on('error', respondToError);
  req.end();

  function handleResponseEvents(res) {
    res.setEncoding('utf8');
    res.on('data', function receiveChunk(chunk) {
      responseString += chunk;
    });
    res.on('end', function endData() {
      callback(null, res, JSON.parse(responseString));
    });
  }

  function respondToError(error) {
    callback(error);
  }
}

Tests

Run tests with make test.

To run the client credentials tests, create a config.js file in tests/ with these contents:

module.exports = {
  clientId: '<Your Spotify API client id>',
  clientSecret: '<Your Spotify API client secret>'
};

Then, run node tests/bearer-token-tests.js.

License

The MIT License (MIT)

Copyright (c) 2017 Jim Kang

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.