fp/services/tracker-helper/app.ts

import { Elysia, t, type Context } from 'elysia'
import { version } from './package.json';
import { basicAuth } from '@eelkevdbos/elysia-basic-auth'



const whitelistFilePath = process.env.WL_FILE_PATH || "/etc/opentracker/whitelist"
const adderFifoFilePath = process.env.WL_FIFO_PATH || "/var/run/opentracker/adder.fifo"

const authOpts = {
  scope: [
    "/whitelist",
    "/version"
  ],
  credentials: {
    env: 'WL_CREDENTIALS'
  }
}

const startupChecks = function startupChecks() {

  if (!process.env.WL_CREDENTIALS) {
    const msg = `WL_CREDENTIALS is missing in env!`
    if (process.env.NODE_ENV === "test") {
      console.warn(msg)
    } else {
      throw new Error(msg)
    }
  }

  if (!process.env.WL_FILE_PATH) {
    console.warn(`WL_FILE_PATH is missing in env. Using default ${whitelistFilePath}`)
  }

  if (!process.env.WL_FIFO_PATH) {
    console.warn(`WL_FIFO_PATH is missing in env. Using default ${adderFifoFilePath}`)
  }

  // throw if the whitelist file doesn't exist
  Bun.file(whitelistFilePath);

}



const getWhitelist = function getWhitelist(ctx: Context) {
  const wl = Bun.file(whitelistFilePath); // relative to cwd
  console.debug(`read from whitelist file at ${whitelistFilePath}. size=${wl.size}, type=${wl.type}`)
  return wl.text()
}

const postWhitelist = async function postWhitelist(ctx: Context) {
  const body = ctx.body
  console.log(`Whitelister is appending ${body} to fifo at ${adderFifoFilePath}`)
  const fifo = Bun.file(adderFifoFilePath)
  Bun.write(fifo, body + "\n")
  console.log(`${body} was sent to the FIFO at ${adderFifoFilePath}`)
  return body
}


startupChecks()


const app = new Elysia()
  .use(basicAuth(authOpts))
  .get('/health', () => 'OK')
  .get('/version', () => `version ${version} `)
  .get('/whitelist', getWhitelist)
  .post('/whitelist', postWhitelist, {
    body: t.String()
  })


export default app