gistfile1.txt

"use strict";

const fs = require("fs");
const glob = require("fast-glob");
const piexif = require("piexifjs");

const TEST_RUN = false;
const DATE_TIME_ORIGINAL = piexif.ExifIFD.DateTimeOriginal;
const META_DATA_FOLDER = "72157710213394221_30bc46431d95_part1";

function toDataUrl(path) {
  let file = fs.readFileSync(path);
  return "data:image/jpeg;base64," + file.toString('base64');
}

function readJSON(path) {
  let rawdata = fs.readFileSync(path);
  return JSON.parse(rawdata);
}

async function run() {
  let files = await glob("data-download-*/*.jpg");

  for (let file of files) {
    let base64 = toDataUrl(file);
    let meta, hasDate = true;
    try {
      meta = piexif.load(base64);
      hasDate = DATE_TIME_ORIGINAL in meta.Exif;
    } catch (e) {
      console.log(`${file} has broken metadata`);
    }
    if (!hasDate) {
      console.log(`Processsing ${file}`);
      let id = file.split("_").reverse()[1];
      let flickrMeta = readJSON(`${META_DATA_FOLDER}/photo_${id}.json`);
      let date = flickrMeta.date_taken.replace(/-/g, ":");
      console.log(` * adding date: ${date}`);
      meta.Exif[DATE_TIME_ORIGINAL] = flickrMeta.date_taken;
      let newExif = piexif.dump(meta);
      let newFileData = piexif.insert(newExif, base64)
        .split(';base64,').pop();
      if (TEST_RUN) {
        file = file.replace("_o.jpg", "_o_replaced.jpg");
      }
      fs.writeFileSync(file, newFileData, {encoding: 'base64'});
    }
  }
}

run();