docparse-check-imacros/index.js

check if a given bill already exists in the docparse database using the docparse server REST api

/**
 * Get a list of existing bills from the DocParse api server
 */
var rk = require('required-keys');
function validateData(data, cb) {
  var err = rk.truthySync(data, ['supplierCode', 'billNumber', 'config'])
  if (err) { return cb(err) }
  cb()
}
function getURL(data) {
  var config = data.config;
  iimDisplay('building query string');
  var queryString = 'supplierCode=' + encodeURIComponent(data.supplierCode)
        + '&billNumber=' + encodeURIComponent(data.billNumber);
  iimDisplay('built query string: ' +queryString);

  var api = config.api
  var url = 'https://'+ encodeURIComponent(api.email) + ':' + encodeURIComponent(api.password)
        + '@'+api.host + ':' + api.port
        + '/api/scrape/check?' + queryString;
  iimDisplay('got url: ' + url);
  return url;
}
function parseResponse(request, cb) {
  var body = request.response;
  if (body === 'Unauthorized') {
    iimDisplay('check failed, "Unauthorized"');
    return cb('error checking if scraper should download a bill, body: "Unauthorized"');
  }

  var responseData = JSON.parse(body);
  var statusCode = request.status;
  if (statusCode !== 200) {
    iimDisplay('check failed, bad status code: ' + statusCode);
    return cb('error checking if scraper should download bill, bad status code: ' + statusCode);
  }
  if (!responseData.hasOwnProperty('download')) {
    iimDisplay('check reply missing "download" field');
    return cb('check reply missing "download" property');
  }
  if (!responseData.hasOwnProperty('message')) {
    iimDisplay('check reply missing "message" field');
    return cb('check reply missing "message"" property');
  }
  iimDisplay('check complete with result: ' + JSON.stringify(responseData.download));
  cb(null, responseData.download);
}

module.exports = function(data, cb) {
  iimDisplay('validating check data');
  validateData(data, function (err, reply) {
    if (err) { return cb(err); }
    iimDisplay('check data validated');
    if (!cb) {
      iimDisplay('no callback supplied to check data');
      alert('no callback supplied to check data');
      return;
    }
    if (data.billNumbers) {
      var index = data.billNumbers.indexOf(data.billNumber);
      if (index >= 0) {
        var download = false;
        return cb(null, download);
      }
    }
    iimDisplay('getting url');
    var url = getURL(data);
    iimDisplay('got url: ' + url);
    var request = new XMLHttpRequest();
    var async = false;
    request.open('GET', url, async);
    request.send();
    // because of "false" above, will block until the request is done and status
    // is available. Not recommended, however it works for simple cases.
    iimDisplay('parsing check response: ' + request.response);
    parseResponse(request, cb);
  });
};