Kindleの購入書籍リストを出力するやつ

downloadKindleBookList.js

// https://read.amazon.co.jp/ 開いて実行

function generateMangaCollectionSearchQuery(pagination = "") {
  const sortType = {
    acquisition_desc: "acquisition_desc",
    acquisition_asc: "acquisition_asc",
  };
  const query = {
    querySize: 50,
    sortType: sortType.acquisition_desc,
  };
  return new URLSearchParams(
    pagination === "" ? query : { ...query, paginationToken: pagination }
  );
}

function generateBookListSearchQuery(pagination = 0) {
  const sortType = {
    title: "title",
    acquisition_desc: "acquisition_desc",
    acquisition_asc: "acquisition_asc",
    author: "author",
    recency: "recency",
  };
  const query = {
    query: "",
    libraryType: "BOOKS",
    sortType: sortType.recency,
    querySize: 50, //最大50
  };
  return new URLSearchParams(
    pagination === 0 ? query : { ...query, paginationToken: pagination }
  );
}

async function* fetchList(config) {
  const searchURL = new URL(config.url);
  let currentPagination = config.initial;
  let isPaginationExist = true;
  while (isPaginationExist) {
    searchURL.search = config.searchParamFunc(currentPagination);
    const res = await fetch(searchURL);
    if (!res.ok) throw new Error("おかしい");
    const json = await res.json();
    const items = json.itemsList;
    if (
      Object.hasOwn(json, "paginationToken") &&
      typeof json.paginationToken === "string"
    ) {
      currentPagination = json.paginationToken;
      yield {
        items,
        nextPagination: currentPagination,
      };
    } else {
      isPaginationExist = false;
      yield {
        items,
      };
    }
  }
}

function wait() {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve("ok");
    }, 1000);
  });
}

async function getList(config) {
  let array = [];
  for await (const { items } of fetchList(config)) {
    console.info(`fetch: ${items.length}`);
    array = [...array, ...items];
    await wait();
  }
  return array;
}

function getBookListConfig() {
  return {
    url: new URL("https://read.amazon.co.jp/kindle-library/search"),
    searchParamFunc: generateBookListSearchQuery,
    initial: 0,
  };
}

function getMangaCollectionConfig() {
  return {
    url: new URL("https://read.amazon.co.jp/kindle-library/api/collection"),
    searchParamFunc: generateMangaCollectionSearchQuery,
    initial: "",
  };
}

async function downloadList(type) {
  let config;
  let fileName;
  switch (type) {
    case "books": {
      config = getBookListConfig();
      fileName = "BookList";
      break;
    }
    case "collections": {
      config = getMangaCollectionConfig();
      fileName = "CollectionList";
      break;
    }
    default: {
      throw new Error(`${config} is unknown`);
    }
  }
  const books = await getList(config);
  const blob = new Blob([JSON.stringify(books)], { type: "text/plain" });
  const url = window.URL.createObjectURL(blob);
  const link = document.createElement("a");
  link.download = `Kindle${fileName}_${Date.now()}.json`;
  link.href = url;
  document.body.appendChild(link);
  link.click();
  window.URL.revokeObjectURL(link.href);
  document.body.removeChild(link);
}

downloadList("books");