kakao_saver.js

// ==UserScript==
// @name         Kakao Saver
// @namespace    http://tampermonkey.net/
// @version      2025-03-25
// @description  try to take over the world!
// @author       Shuraken
// @match        https://page.kakao.com/content/*/viewer/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=kakao.com
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    async function delay(ms) {
        return new Promise(resolve => setTimeout(resolve, ms))
    }

    function get_paragraphs() {
        let root = [...document.querySelectorAll('div')].filter(x => x.shadowRoot)
        if (root.length === 0) return null
        let paragraphs = [...root[0].shadowRoot.firstChild.getElementsByTagName('p')]
        if (paragraphs.length === 0) return null
        return paragraphs
    }

    function get_book_chapter() {
      let path_arr = window.location.href.split('/')
      let chapter = path_arr.pop()
      path_arr.pop()
      let book = path_arr.pop()
      return [book, chapter]
    }

    function save_paragraphs(paragraphs) {
        let [book, chapter] = get_book_chapter()
        let storage = localStorage.getItem(`kakao_saver_${book}`) || '{}'
        storage = JSON.parse(storage)
        storage[chapter] = paragraphs.map(x => x.textContent).join('\n')
        localStorage.setItem(`kakao_saver_${book}`, JSON.stringify(storage))
        console.log(`saved ${paragraphs.length} paragraphs for ${chapter} chapter`)
    }

    function kk_print() {
        let [book, _] = get_book_chapter()
        let storage = localStorage.getItem(`kakao_saver_${book}`) || '{}'
        storage = JSON.parse(storage)
        let sorted_pairs = Object.entries(storage).sort(([, a], [, b]) => Number(b) - Number(a))
        if (sorted_pairs.length === 0) {
           console.log("nothing to print, no chapters")
           return
        }
        let chapters = []
        for (let [_, val] of sorted_pairs)
            chapters.push(val)
        console.log(chapters.join("\n\n"))
        console.log(`printed ${chapters.length} chapters`)
        console.log(`first started with ${chapters[0].substring(0, 10)}`)
        console.log(`last ended with ${chapters[chapters.length - 1].slice(-10, -1)}`)
    }
    window.kk_print = kk_print

    async function run() {
       let paragraphs;
       while(!paragraphs) {
            paragraphs = get_paragraphs()
           await delay(200)
       }
       save_paragraphs(paragraphs)
    }

    run()

    window.navigation.addEventListener("navigate", () => run())
})();