118 lines
3.0 KiB
JavaScript
118 lines
3.0 KiB
JavaScript
const request = require('request')
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const cheerio = require('cheerio')
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const qs = require('querystring')
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/**
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* @typedef lastPost
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* @prop {string} txt post body
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* @prop {string} id post id
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* @prop {string} link post link
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* @prop {string} time timestamp
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*/
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/**
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* get facebook fan page last post
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* @param {string} pageid facebook fan page id
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* @return {Promise<lastPost>}
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*/
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const getLastPost = async (pageid = '') => {
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if (typeof pageid !== 'string' || pageid.trim().length === 0) return null
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pageid = pageid.trim()
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// console.log('access facebook fan page :::: ' + pageid)
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let page = await new Promise((resolve) => {
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request({
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baseUrl: 'https://www.facebook.com',
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url: `/${encodeURIComponent(pageid)}/posts`,
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method: 'get',
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headers: {
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'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0'
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}
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}, (err, res, body) => {
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if (err) {
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resolve(null)
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return
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}
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if (body && typeof body !== 'string' && !(body instanceof String)) {
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resolve(null)
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return
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}
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resolve(body)
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})
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})
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if (page === null) return null
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console.log(`${pageid} page length :::: `, Buffer.from(page).length)
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let $ = cheerio.load(page, {
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lowerCaseTags: true,
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lowerCaseAttributeNames: true
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})
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let posts = []
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$('div.userContentWrapper').each((i, el) => {
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let t = cheerio.load(el)
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let timeEl = t('abbr')
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let time = timeEl.attr('data-utime')
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let link = timeEl.parent().attr('href')
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let p = t('div.userContent')
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let txt = p.text() || ''
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let id = p.first().attr('id')
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if (!id) {
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if (/[\?|&]id\=(\d+)/.test(link)) { // eslint-disable-line
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let m = link.match(/[\?|&]story_fbid\=(\d+)/) // eslint-disable-line
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if (m !== null && m.length > 1) {
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id = m[1]
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}
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} else if (/\/posts\/(\d+)/.test(link)) {
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let m = link.match(/\/posts\/(\d+)/)
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if (m !== null && m.length > 1) {
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id = m[1]
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}
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} else if (/\/photos\/.+?\/(\d+)/.test(link)) {
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let m = link.match(/\/photos\/.+?\/(\d+)/)
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if (m !== null && m.length > 1) {
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id = m[1]
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}
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} else if (/\/videos\/(\d+)/.test(link)) {
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let m = link.match(/\/videos\/(\d+)/)
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if (m !== null && m.length > 1) {
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id = m[1]
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}
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}
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}
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// console.log(time, link, txt, id)
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if (!time || !link || !id) return null
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let tmp = {
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txt,
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id,
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link,
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time
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}
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posts.push(tmp)
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el = null
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t = null
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})
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$ = null
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if (posts.length === 0) return null
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posts.sort((a, b) => {
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return b.time - a.time
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})
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let post = posts[0]
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let larr = post.link.split('?')
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let linkqs = qs.parse(larr[1])
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let newqs = {}
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for (let i in linkqs) {
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if (/id/i.test(i)) {
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newqs[i] = linkqs[i]
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}
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}
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post.link = larr[0] + '?' + qs.stringify(newqs)
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post.link = `https://www.facebook.com/${post.link.replace(/^\//, '')}`.replace(/\?$/, '')
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return post
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}
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module.exports = {
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getLastPost
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}
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