链家租房列表增加一些信息

比如加上小区的建筑年代
当前为 2021-07-24 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         链家租房列表增加一些信息
// @namespace    https://greasyfork.org/zh-CN/users/177458-bd777
// @version      0.1
// @description  比如加上小区的建筑年代
// @author       windeng
// @match        https://gz.lianjia.com/zufang/*
// @icon         https://www.google.com/s2/favicons?domain=lianjia.com
// @grant        GM_xmlhttpRequest
// ==/UserScript==

var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver

async function Sleep(sleepSecs) {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            resolve()
        }, sleepSecs * 1000)
    })
}

async function WaitUntil(conditionFunc, sleepSecs) {
    sleepSecs = sleepSecs || 1
    return new Promise((resolve, reject) => {
        if (conditionFunc()) resolve()
        let interval = setInterval(() => {
            if (conditionFunc()) {
                clearInterval(interval)
                resolve()
            }
        }, sleepSecs * 1000)
    })
}

function Request(url, opt={}) {
	Object.assign(opt, {
		url,
		timeout: 2000,
		responseType: 'json'
	})

	return new Promise((resolve, reject) => {
		/*
		for (let f of ['onerror', 'ontimeout'])
			opt[f] = reject
		*/

		opt.onerror = opt.ontimeout = reject
		opt.onload = resolve

		GM_xmlhttpRequest(opt)
	}).then(res => {
        // console.log('?', url, res)
        if (res.status === 200) return Promise.resolve(res.response || res.responseText)
        else return Promise.reject(res)
    }, err => {
        return Promise.reject(err)
    })
}

function Get(url, opt={}) {
    Object.assign(opt, {
        method: 'GET'
    })
    return Request(url, opt)
}

function Post(url, opt={}) {
    Object.assign(opt, {
        method: 'POST'
    })
    return Request(url, opt)
}

async function GetElementByText(startElem, selector, text, exist) {
    /*
    selector: 选择器
    text: 内容
    exist: 是否只要存在就ojbk
    */
    exist = exist || false
    let elemList = startElem.querySelectorAll(selector)
    for (let i = 0; i < elemList.length; ++i) {
        let elem = elemList[i]
        if (exist) {
            if (elem.innerText.search(text) !== -1) return elem
        } else {
            if (elem.innerText === text) return elem
        }
    }
}

async function GetXiaoquPage(xiaoquId) {
    return Get(`https://gz.lianjia.com/xiaoqu/${xiaoquId}`)
}

async function GetXiaoquInfo(xiaoquId) {
    let resp = await GetXiaoquPage(xiaoquId)
    // console.log(resp)
    let el = document.createElement('html')
    el.innerHTML = resp
    // console.log(el)
    let elemList = el.querySelectorAll('div.xiaoquInfo > div.xiaoquInfoItem')
    let result = {}
    for (let i=0; i<elemList.length; ++i) {
        let elem = elemList[i]
        let label = elem.querySelector('span.xiaoquInfoLabel').innerText.trim()
        let content = elem.querySelector('span.xiaoquInfoContent').innerText.trim()
        result[label] = content
    }

    return result
}

async function DoLogic() {
    await WaitUntil(() => {
        return !!document.querySelector('div.content__list')
    })

    let divList = document.querySelectorAll('div.content__list--item')
    for (let i=0; i<divList.length; ++i) {
        let div = divList[i]
        // 获取小区id
        let a = div.querySelector('p.content__list--item--des > a:nth-of-type(3)')
        let matches = a.getAttribute('href').match(/zufang\/c(\d+)/)
        // console.log(a, matches)
        if (!matches) continue
        let xiaoquId = matches[1]


        let xiaoquInfo = await GetXiaoquInfo(xiaoquId)
        console.log(xiaoquInfo)
        let desElem = div.querySelector('p.content__list--item--des')
        let span = document.createElement('span')
        span.innerHTML = `<i>/</i> ${xiaoquInfo["建筑年代"]}`
        desElem.appendChild(span)

        /*
        GetXiaoquInfo(xiaoquId).then(xiaoquInfo => {
            console.log(xiaoquInfo)
            let desElem = div.querySelector('p.content__list--item--des')
            let span = document.createElement('span')
            span.innerHTML = `<i>/</i> ${xiaoquInfo["建筑年代"]}`
            desElem.appendChild(span)
        }).catch(err => {
            console.error(err)
        })
        */
    }
}

(async function() {
    'use strict';

    // Your code here...
    await DoLogic()
})();