callsign/src/node/modules/getAmateurRadioDetailedByCallsign.js

Amateur radio and airline call sign inquiry

const callsignDB = require('../../lib/HamCallsignDB/cty.json')

const getAmateurRadioDetailedByCallsign = callsign => {
    if (typeof callsign !== 'string') {
    console.error('[callsign.js]: Callsign must be string')
    return
    }
    callsign = callsign.toUpperCase()
  let result1 = callsignDB['1'].find(x => {
    return x.prefix === callsign.substring(0, 1)
  })
  let result2 = callsignDB['2'].find(x => {
    return x.prefix === callsign.substring(0, 2)
  })
  let result3 = callsignDB['3'].find(x => {
    return x.prefix === callsign.substring(0, 3)
  })
  let result4 = callsignDB['4'].find(x => {
    return x.prefix === callsign.substring(0, 4)
  })
  let result
  if (result4 === undefined) {
    if (result3 === undefined) {
      if (result2 === undefined) {
        if (result1 === undefined) {
          result = undefined
        } else {
          result = result1
        }
      } else {
        result = result2
      }
    } else {
      result = result3
    }
  } else {
    result = result4
  }
  return result
}

module.exports = getAmateurRadioDetailedByCallsign