getRandomId.js

const {readdirSync,existsSync, mkdirSync} = require("fs");
const {normalize,} = require("path")
const {getQuestionListJson} = require("../resources/questionListJson");
const {getQuestionSearchJson} = require("../resources/questionSearchJson");

/**
 * todo 需要先获取全部题目列表 需要处理随机的问题
 * @returns {*[]}
 */
async function getAllIds() {
    const total = await getCount();
    const randomSkip = total;
    const res =await fetch("https://leetcode.cn/graphql/", getQuestionListJson(0)).then((res => res.json()));
    return res?.data?.problemsetQuestionList?.questions?.map(q=>q.frontendQuestionId);
}
/**
 * 获取总数
 * @returns {Promise<any>}
 */
async function getCount(){
    return fetch("https://leetcode.cn/graphql/", getQuestionListJson(0)).then((res => res.json())).then((res)=>res?.data?.problemsetQuestionList?.total);
}
/**
 * 读取本地存在的所有题目 并随机题目
 */
async function getRandomId(){
    const parse = (name)=>name.replace(/\.[a-zA-Z0-9-]+$/i,"");
    // src 目录
    const src = normalize("./src/");
    // 不存在就创建
    existsSync(src)||mkdirSync(src);
    // 所有本地题目
    const allLocalIds = readdirSync(src).map(o=>parse(o));
    const allIds =await getAllIds();
    const filtered = allIds.filter(o=>!allLocalIds.includes(o));
    return filtered[random(filtered.length)]
}
/**
 * 获取长度内的随机数组下标
 * @param len 默认值10
 * @returns {number}
 */
function random(len=10){
    return Math.trunc(Math.random()*len%len);
}
module.exports = {getRandomId,random,getAllIds}