Amazon Kindle Exporter

ExportKindle.js

// The following data should be run in the console while viewing the page https://read.amazon.com/
// It will export a JSON file called "kindleItems.json"

(function () {
  const saveJSON = function (data, filename) {
    if (!data) {
      console.error("save: No data");
      return;
    }

    if (!filename) filename = "download.json";

    if (typeof data === "object") {
      data = JSON.stringify(data, undefined, 4);
    }

    var blob = new Blob([data], { type: "text/json" }),
      e = document.createEvent("MouseEvents"),
      a = document.createElement("a");

    a.download = filename;
    a.href = window.URL.createObjectURL(blob);
    a.dataset.downloadurl = ["text/json", a.download, a.href].join(":");
    e.initMouseEvent(
      "click",
      true,
      false,
      window,
      0,
      0,
      0,
      0,
      0,
      false,
      false,
      false,
      false,
      0,
      null
    );
    a.dispatchEvent(e);
  };

  const db = openDatabase("K4W", "5", "thedatabase", 1024 * 1024);
  db.transaction(function (tx) {
    tx.executeSql(
      "SELECT * FROM bookdata ORDER BY purchaseDate;",
      [],
      function (tx, results) {
        const data = [];
        for (i = 0; i < results.rows.length; i++) {
          const item = results.rows.item(i);
          // Get the data
          const asin = item.asin;
          const title = item.title;
          const titlePronunciation = item.titlePronunciation;
          const authors = JSON.parse(item.authors);
          let authorPronunciations;
          if (item.authorPronunciations) {
            authorPronunciations = JSON.parse(item.authorPronunciations);
          }
          const purchaseDate = new Date(item.purchaseDate).toLocaleDateString();

          data.push({
            asin,
            title,
            titlePronunciation,
            authors,
            authorPronunciations,
            purchaseDate,
          });
        }
        // "Export" the data
        saveJSON(data, "kindleItems.json");
      }
    );
  });
})();