demo hashmap to structs

struct.js

const fs = require("fs");

function dateCompress(d) {
  return d.replace(/\.\d{3}\+\d{2}:\d{2}$/g, "Z");
}

function getSize(d) {
  return Math.ceil(d.length / 1024).toLocaleString() + "kB";
}

function compareSize(a, b) {
  console.log("uncompressed", getSize(JSON.stringify(a)));
  console.log(" compressed", getSize(JSON.stringify(b)));
}

let rawdata = fs.readFileSync("./personal-2021-2-10.if").toString();

let data = JSON.parse(rawdata);

let uncompressedEntities = data.entities;
let compressedEntities = [];

// {"id":"1","content":"phoebe","createdAt":"2021-02-08T20:48:46.569+00:00","updatedAt":"2021-02-08T20:48:46.569+00:00"}
Object.values(uncompressedEntities).forEach((e) => {
  let entity = [
    e.id,
    e.content,
    dateCompress(e.createdAt),
    dateCompress(e.updatedAt),
  ];
  compressedEntities.push(entity);
});
compareSize(uncompressedEntities, compressedEntities);

// {
// "id":"BcIfWvz3-8",
// "tokens":[
//     {"type":"paragraph",
//     "content":[
//         {"type":"text",
//         "content":"i am excited to become more proficient in who i am"},
//         {"type":"author","entityId":"148"},
//         {"type":"text","content":" varga"},
//         {"type":"hashtag","content":"#quote"},
//         {"type":"text","content":" on growing up and going to college"}
//     ]}],
//     "createdAt":"2021-02-08T20:48:46.760Z",
//     "updatedAt":"2021-02-08T20:48:48.220Z",
//     "position":"bqi",
//     "insertedAt":"00000000",
// ]
// "authorId":"google-oauth2|112556675592475315585"}

let notes = data.notes;

function compressToken(t) {
  switch (t) {
    case "paragraph":
      return ["p", compressToken(t.content)];
    case "text":
      return ["t", t.content];
    case "author":
      return ["a", t.entityId];
    case "mention":
      return ["m", t.entityId];
    case "hashtag":
      return ["h", t.content];
    default:
      return [t.type, t]; // fallback for unknown tokens
  }
}
function compressTokens(tks) {
  tks.map(compressToken);
}
let time = Date.now();
let compressedNotes = [];

Object.values(notes).forEach((n) => {
  let note = [
    n.id,
    compressTokens(n.tokens),
    dateCompress(n.createdAt),
    dateCompress(n.updatedAt),
    position,
    n.insertedAt,
    n.authorId,
  ];
  compressedNotes.push(note);
});

console.log(Date.now() - time);
compareSize(notes, compressedNotes);