baz.ts

import { parse, HTMLElement, TextNode } from 'node-html-parser'
import { get } from 'http'

export interface Theater {
	code: string
	name: string
	city: string
	area: string
}

const zipWith = <A, B, T>(a: A[], b: B[], func: (a: A, b: B) => T): T[] =>
	Array.from({length: a.length > b.length ? b.length : a.length}, (_, i) => func(a[i], b[i]))

const getText = (v: HTMLElement | TextNode): string => {
	if (v instanceof TextNode) {
		return v.rawText
	}

	return v.childNodes
		.filter(z => z instanceof TextNode)
		.map(z => z.rawText).join(' ')
}

const parser = (html: string): Theater[] => {
	const el = parse(html, {
		script: false,
		style: false,
		lowerCaseTagName: false,
		pre: false
	})

	if (el instanceof TextNode) return []

	const table = el.querySelector('table.tbl_exc')

	const ths = table.querySelector('thead')
		.querySelectorAll('th')
		.map(getText)

	const trs = table.querySelector('tbody')
		.querySelectorAll('tr')
		.map(v => v.querySelectorAll('td').map(getText))

	return trs.map(row =>
		Object.assign({}, ...zipWith(ths, row, (k, v) => ({[k]: v})))
	).filter(row => row.영업상태 === '영업').map(row => ({
		code: row.영화상영관코드,
		name: row.영화상영관명,
		city: row.광역단체,
		area: row.기초단체,
	}))
}
const url = 'http://www.kobis.or.kr/kobis/business/mast/thea/findTheaterInfoListXls.do'
const firefox = 'Mozilla/5.0 (X11; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0'

const request = () => new Promise<string>((ok, err) =>
	get(url, { headers: { 'User-Agent': firefox } }, res => {
		res.setEncoding('utf8')
		let data: string = '';
		res.on('data', ch => data += ch)
		res.on('end', () => ok(data))
	}).on('error', e => err(e))
)

export const download = async () => console.log(JSON.stringify(parser(await request())))

if (require.main === module) {
	download()
}