Retrieves data from PatentsView.org API

patent.js

const cache = {}
const bigNandlitteNcompanies = [
  'Amazon Technologies, Inc.',
  'Microsoft Technology Licensing, LLC',
  'Apple Inc.',
  'Facebook, Inc.',
  'Google Inc.',
  'LinkedIn Corporation',
  'Uber Technologies, Inc.',
  'Pinterest, Inc.',
  'Snapchat, Inc.',
  'QUALCOMM Incorporated',
  'Two Sigma Investments, LLC',
  'Palantir Technologies, Inc.',
  'Dropbox, Inc.',
  'Square, Inc.',
  'salesforce.com, inc.',
  'Yahoo! Inc.',
  'Netflix, Inc.',
  'Twitter, Inc.'
].map(companyName => {
  cache[companyName] = {};
  for (var year = 2006; year <= 2016; year++) {
    makePatentCall(companyName, year);
  }
});

// TODO: promisify makePatentCall and do a cache to CSV after promise.all
function cacheToCSV(cache) {
  const csv = {};
  const csvHeader = [];
  const comapanies = Object.keys(cache);

  comapanies.map(company => {
    csvHeader.push(company);
    const years = Object.keys(cache[company]);
    return years.map(year => {
      if (!csv[year]) { csv[year] = [] };
      const value = cache[company][year];
      csv[year].push(value)
    });
  });

  const csvStr = [];
  csvStr.push('\t' + csvHeader.join('\t'));
  const years = Object.keys(csv);
  years.map(year => {
    csvStr.push(`${year}\t` + csv[year].join('\t'));
  })
  return csvStr.join('\r\n');
}

function makePatentCall(companyName, yearEnding) {
  const xmlhttp = new XMLHttpRequest();
  const url = buildPatentsViewURL([companyName], `${yearEnding}-01-01`, `${yearEnding}-12-31`);

  xmlhttp.onreadystatechange = () => {
    if (xmlhttp.readyState == XMLHttpRequest.DONE) {
       if (xmlhttp.status == 200) {
         const patentData = JSON.parse(xmlhttp.response);
         console.log(`${companyName}, ${yearEnding}, ${patentData.total_patent_count}`);
         cache[companyName][yearEnding] = patentData.total_patent_count;
       } else {
         alert(`There was an error ${xmlhttp.status}!`);
       }
    }
  };

  xmlhttp.open('GET', url, true);
  xmlhttp.send();
}

function buildPatentsViewURL(
  organizationNames = [],
  dateStart = '2016-01-01',
  dateEnd = '2016-12-31',
  dataToGetBack = ['patent_title', 'inventor_first_name', 'inventor_last_name', 'patent_date', 'assignee_organization']) {

  const listOfDataToGetBack = dataToGetBack.map(data => `"${data}"`).join(',');
  const listOfOrganizations = organizationNames.map(orgName => `{"_and":[
    {"_eq": {"assignee_organization":"${orgName}"}},
    {"assignee_type":"2"},
    {"assignee_lastknown_country":"US"},
    {"_gte":{"patent_date":"${dateStart}"}},
    {"_lte":{"patent_date":"${dateEnd}"}}
  ]}`).join(',')

  return `http://www.patentsview.org/api/patents/query?q={"_or":[${listOfOrganizations}]}&f=[${listOfDataToGetBack}]`;
}