This is a Bot for the Telegram instant messaging service that sends you air quality data retrieved from openaq.org. It answers when you send it your current location or the name of a place that you want to know about.
This bots runs in Telegram. If you just want to try it out go to https://t.me/DontPolluteMeBot.
If you want to run the bot on your own server download the code and run the npm start task.
You will have to set up the following environment variables to make it run properly:
APP_URL public url where your server can be reached
GOOGLE_GEOCODING_API_KEY an api key for the google geocoding api (it might actually run without it but you will be restricted to a small number of calls per minute)
TELEGRAM_TOKEN the api token of your telegram bot.
This bot runs as a minimalistic node.js server that receives the Telegram messages send to it as POST requests. If a location is sent, it simply looks up the latest data for the given coordinates in a 25 km radius. If an address is sent, it fist calls the Google Maps Geocoding API (https://developers.google.com/maps/documentation/geocoding) to get the coordinates for the address. The bot returns only data more recent than 3 days and preferres measurements close to the given coordinates.