script to generate sankeymatic.com markup for job interview stages

sankey.js

const input = `
LinkedIn, Applied, Initial interview, Pending interview
cord.co (inbound), Applied, Initial interview, Pending response
cord.co (inbound), Applied, Pending response
cord.co (inbound), Applied, Initial interview, Pending response
Referral, Applied, Pending response
Search, Applied, Pending interview
cord.co (inbound), Applied, Initial interview, Pending response
Wellfound, Applied, Stalled
Speculative, Applied, Stalled
Wellfound, Applied, Stalled
LinkedIn, Applied, Stalled
cord.co (outbound), Applied, Stalled
cord.co (outbound), Applied, Stalled
Search, Applied, Stalled
LinkedIn, Applied, Initial interview, Rejected
LinkedIn, Applied, Rejected
LinkedIn, Applied, Rejected
eFinancialCareers, Applied, Rejected
LinkedIn, Applied, Initial interview, Technical exercise, Withdrew
Wellfound, Applied, Initial interview, Rejected
cord.co (outbound), Applied, Rejected
Search, Applied, Rejected
Search, Applied, Rejected
`;

const lines = input.trim().split("\n");

const pairCounts = {};

for (const line of lines) {
  const stages = line.split(",");

  if (stages.length <= 1) {
    continue;
  }

  for (let index = 0; index < stages.length - 1; index++) {
    const a = stages[index].trim();
    const b = stages[index + 1].trim();

    const key = `${a},${b}`;

    if (!pairCounts[key]) {
      pairCounts[key] = 0;
    }

    pairCounts[key] += 1;
  }
}

const pairEntries = Object.entries(pairCounts).toSorted();

let results = "";

for (const entry of pairEntries) {
  const [key, value] = entry;

  const [a, b] = key.split(",");

  results += `\n${a} [${value}] ${b}`;
}

console.log(results);