genfilter.js

const fetch = require('node-fetch')

if (process.argv.length < 3) {
  console.error(`Usage: node genfilter.js <URL>`)
  process.exit(1)
}

const escapeRegExp = (str) => str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, '\\$&')
const infoRegex = /([^\s="]+)=(?:"(.*?)"|(\d+))(?:,([.*^,]))?/g

// simple m3u_plus parser
const getPlaylist = async (url) => {
  const body = (await (await fetch(url)).text()).split('\n').slice(1)
  const out = []
  body.forEach((str, i) => {
    if (i % 2 === 0) {
      let m
      const innerOut = {}
      while ((m = infoRegex.exec(str)) !== null) {
        if (m.index === infoRegex.lastIndex) {
          infoRegex.lastIndex++
        }
        innerOut[m[1].replace('tvg-', '').replace('group-title', 'group')] = m[2]
      }
      out.push(innerOut)
    } else {
      out[Math.floor(i / 2)].url = str.trim()
    }
  })
  return out
}

const run = async () => {
  const url = process.argv[2]
  const p = await getPlaylist(url)
  const filter = p.map((pl, i) => {
    return {
      channel: i + 1,
      name: escapeRegExp(pl.name)
    }
  })
  console.log(JSON.stringify(filter, null, 2))
}

run()