hutCrawlerTaiwanForestRecreation.coffee

request = require 'request' # https://github.com/request/request
cheerio = require 'cheerio' # https://github.com/cheeriojs/cheerio	
async = require 'async'

async.waterfall([
	(cb) ->
		request 'http://recreation.forest.gov.tw/index.aspx', (err, res, body) ->
			$ = cheerio.load body
			# console.log 'open homepage: ' + res.statusCode
			# console.log res.headers
			cb null, $('#__VIEWSTATE').val(), $('#__EVENTVALIDATION').val()
	
	,(viewstate, eventvalidation, cb) ->
		request(
			{
				'method': 'POST'
				'url': 'http://recreation.forest.gov.tw/index.aspx'
				'headers':
					'Connection': 'keep-alive'
				'form':
					'__VIEWSTATE': viewstate
					'__EVENTVALIDATION': eventvalidation
					'ctl00$ContentPlaceHolder1$ID_TextBox': 'hut.crawler.tw@gmail.com'
					'ctl00$ContentPlaceHolder1$Pass_TextBox': 'iamahutcrawler1'
					'ctl00$ContentPlaceHolder1$btn_login': '登入'
			}, (err, res, body) ->
				# console.log 'login: ' + res.statusCode
				# console.log res.headers
				# cookie = res.headers['set-cookie'][0].split(';')[0] + ';' + res.headers['set-cookie'][1].split(';')[0]
				cookie = res.headers['set-cookie'][0].split(';')[0]
				cb null, cookie
		)
	
	,(cookie, cb) ->
		request(
			{
				'url': 'http://recreation.forest.gov.tw/askformonhouse/AskForPaperAddNew.aspx?mode=0&AskSID=&houseid=C'
				'headers':
					'Connection': 'keep-alive'
					'Cookie': cookie
			}, (err, res, body) ->
				# console.log 'get hut: ' + res.statusCode
				# console.log res.headers
				$ThisMonth = cheerio.load body
				# parser $1
				# console.log $('#eventscalendar_ctl00_label2').text().split(' ')[0]
				cb null, cookie, $ThisMonth, $ThisMonth('#__VIEWSTATE').val(), $ThisMonth('#__EVENTVALIDATION').val()
		)
	,(cookie, $ThisMonth, viewstate, eventvalidation, cb) ->
		request(
			{
				'method': 'POST'
				'url': 'http://recreation.forest.gov.tw/askformonhouse/AskForPaperAddNew.aspx?mode=0&AskSID=&houseid=C'
				'headers':
					'Cookie': cookie
				'form':
					'__VIEWSTATE': viewstate
					'__EVENTVALIDATION': eventvalidation
					'__EVENTTARGET': 'eventscalendar$ctl00$NextMonth'
					'__VIEWSTATEENCRYPTED': ''
			}, (err, res, body) ->
				# console.log 'post hut: ' + res.statusCode
				# console.log res.headers
				$NextMonth = cheerio.load body
				parser $ThisMonth, $NextMonth
				# console.log $('#eventscalendar_ctl00_label2').text().split(' ')[0]
				cb null, 'done'
		)
], (err, result) ->
	console.log result
)

parser = ($ThisMonth, $NextMonth) ->
	# Check the month
	monthZHThisMonth = $ThisMonth('#eventscalendar_ctl00_label2').text().split(' ')[0]
	monthThisMonth=0
	switch monthZHThisMonth
		when '一月' then monthThisMonth = 1
		when '二月' then monthThisMonth = 2
		when '三月' then monthThisMonth = 3
		when '四月' then monthThisMonth = 4
		when '五月' then monthThisMonth = 5
		when '六月' then monthThisMonth = 6
		when '七月' then monthThisMonth = 7
		when '八月' then monthThisMonth = 8
		when '九月' then monthThisMonth = 9
		when '十月' then monthThisMonth = 10
		when '十一月' then monthThisMonth = 11
		when '十二月' then monthThisMonth = 12    

	# Check days one by one
	capacityStatus = []
	dayPre = 0
	month = monthThisMonth
	$ThisMonth('.dayNumber').each (i) ->
		# Calculate the date
		day = parseInt $ThisMonth(this).text()
		if i is 0 and day isnt 1 then month-- else # ex: 4/29 4/30 5/1 5/2
			if day < dayPre then month++ # ex: 5/31 6/1 6/2 6/3
		dayPre = day
		push capacityStatus, $ThisMonth(this), month, day

	monthCheck = month
	dayCheck = dayPre
	month = monthThisMonth + 1
	pass = false
	$NextMonth('.dayNumber').each (i) ->
		# Calculate the date
		day = parseInt $NextMonth(this).text()
		if i is 0 and day isnt 1 then month-- else 
			if day < dayPre then month++
		dayPre = day
		if not pass and month is monthCheck and day is dayCheck then pass = true
		else if pass
			push capacityStatus, $NextMonth(this), month, day

	console.log capacityStatus
	console.log capacityStatus.length

push = (capacityStatus, ele, month, day) ->
	if ele.parent().children().length > 1
		date = new Date()
		date.setMonth(month - 1)
		date.setDate(day)
		remaining = ele.parent().find('#eventscalendar_Label1_0').html().split('<br>')[1].split(':')[1]
		applying = ele.parent().find('#eventscalendar_Label1_0').html().split('<br>')[2].split(':')[1]
		capacityStatus.push
			'date': date,
			'remaining': remaining,
			'applying': applying,
			'waiting': null