Spotify Playlist Generator

Two AWS Lambda Functions that will work in tandem to generate Spotify Playlists based on recently listened to music.

Major Touchpoints

/src/recent_song_logger_index.ts

• Provides the Handler function for the Data Retrieval Lambda.
• Grabs recently played songs and saves them to a DynamoDB
• The DynamoDB will allow me to get around the 50 recent song query limit built into the Spotify API long term.
• Triggered every 20 minutes by a Cloudwatch Trigger

/src/recent_songs_playlist_creator_index.ts

• Provides the Handler function for the Playlist Creation Lambda.
• Grabs the recently played songs, dedupes them, and saves them to a playlist.
• Not currently triggered automatically, though it can run in the cloud via a manual trigger.
• It currently points to Spotifies API to get the recent songs, and needs to be updated to point to the DynamoDB.

/infrastructure

• Contains Terraform defining the following infrastructure pieces in AWS
  • The Data Retrieval Lambda
  • The Playlist Creation Lambda
  • The Song Long DynamoDB
    • Hash key of user_id
    • Range key of time_played_utc
  • Various IAM Policies and Roles
  • Currently there are no Code Pipelines, though that would be a valuable long term add.

Running Locally

config.json

To run locally, you will need to add a config.json file with the following schema in the local_runner folder

{   
	"client_id": "",
	"client_secret": ""   
	"refresh_token": ""
}

You can get a client id and secret by creating an app here: https://developer.spotify.com/dashboard/applications

You can get a refresh token by following the OAuth2 flow against Spotify using Postman: https://blog.postman.com/generate-spotify-playlists-using-a-postman-collection/

• A slight modification to this tutorial is that you will need a token with the following scopes:
  • playlist-read-private
  • playlist-modify-private
  • user-read-recently-played
  • user-top-read

local_runner

There is an included local_runner app that imports a Lambda handler defined in the src folder and runs it locally.

Disclaimer

This project is my first real experience with JS and Typescript, and I acknowledge that there are better ways to handle pieces of it, especially in terms of package management.

Sources

https://developer.spotify.com/documentation/web-api/quick-start/ https://blog.postman.com/generate-spotify-playlists-using-a-postman-collection/ https://github.com/thelinmichael/spotify-web-api-node

Other Resources

https://medium.com/coinmonks/everything-you-wanted-to-know-about-package-lock-json-b81911aa8ab8