buypeeb/listing.py

import requests

import re, json, math
from datetime import datetime, timezone, timedelta

import functions

JST = timezone(timedelta(hours = 9))
LOCALTIME = timezone(timedelta(hours = 10)) # TODO: allow for customisation

class YahooAuctionsItem:
	"""
	A class for handling items on Yahoo! Auctions Japan


	Attributes
	----------
	name : str
		The name given to the auction item by the user.

	original_name : str
		The name as it appears on Y!A,

	favourite : bool
		Whether or not the user has "favourited" this item.

	url : bool
		The URL this item was added from. If not provided, defaults to https://buyee.jp/item/yahoo/auction/{id}.

	id : str
		The ID of the item, found at the end of the URL.

	last_checked : datetime
		The time that the item's status was last checked by buypeeb.

	available : bool
		Whether or not the item is still available (if the auction is still available)

	ready : bool
		Whether or not the object is ready. If not, some of the data (price, available, etc.) may be out of date or unset.

	updating : bool
		If true, the object is currently being updated. Should never be true if ready is true.

	price : float
		The price of the item in yen.

	bids : int
		The number of bids that have been placed on the item.

	start_date : datetime
		The start date and time of the item in JST.

	end_date : datetime
		The end date and time of the item in JST.
	"""
	def __init__(self, url: str, id: str, name: str = "", from_json: dict = None):
		# note - incoming url is not validated in any way!
		self.name = name
		self.price = 0
		self.win_price = 0
		self.original_name = ""
		self.favourite = None
		self.end_date = datetime.fromisoformat('1970-01-01').replace(tzinfo = JST)
		self.start_date = datetime.fromisoformat('1970-01-01').replace(tzinfo = JST)
		self.bids = 0
		self.auto_extension = None
		self.rate = 75.0

		if url == None and from_json != None and id != None:
			self.id = id
			self.name = from_json['name']
			self.original_name = from_json['original_name']
			if self.name == "":
				self.name = self.original_name
			self.favourite = from_json['favourite']
			self.url = f"https://buyee.jp/item/yahoo/auction/{self.id}"

		elif url != None and id != None:
			self.url = url
			self.id = id

		else:
			raise RuntimeError

		self.last_checked = datetime.fromisoformat('1970-01-01')
		self.available = True
		self.ready = False
		self.updating = False

	def update(self):
		self.updating = True
		try:
			# the good news is, yahoo japan returns all the data we need in handy json format
			# the bad news is that the only way to get that json format is to download the whole auction page and grep it

			r = requests.get(f"https://page.auctions.yahoo.co.jp/jp/auction/{self.id}").text
			# r = open("yahoo.html").read()
			j = json.loads(re.match(r'.*var pageData ?= ?(\{.*?\});', r, re.DOTALL).group(1))
			ae = re.search(r'自動延長.+\n.+>(.+)<.+', r)
			if ae != None:
				ae = ae.group(1)
				self.auto_extension = (ae == "あり")

		except:
			raise

		j = j['items']
		self.price = float(j['price'])
		self.win_price = float(j['winPrice'])
		self.bids = j['bids']
		self.start_date = datetime.fromisoformat(j['starttime']).replace(tzinfo = JST)
		self.end_date = datetime.fromisoformat(j['endtime']).replace(tzinfo = JST)
		self.last_checked = datetime.now(JST)
		self.original_name = j['productName']
		if self.name == None or self.name == "":
			self.name = j['productName']

		self.available = (self.end_date_local() >= datetime.now(LOCALTIME))

		self.ready = True
		self.updating = False

		return self.id, self

	def price_jpy(self, win = False):
		p = self.price
		if win:
			p = self.win_price
		return f"¥{p:.0f}"

	def price_aud(self, rate = 0, win = False):
		if rate == 0:
			rate = self.rate
		else:
			self.rate = rate

		p = self.price
		if win:
			p = self.win_price
		return f"${self.price / rate:.2f}"

	def end_date_local(self):
		return self.end_date.astimezone(LOCALTIME)

	def start_date_local(self):
		return self.start_date.astimezone(LOCALTIME)

	def ending_in(self, local = False):
		if local:
			difference = self.end_date_local() - datetime.now(tz = LOCALTIME)
		else:
			difference = self.end_date - datetime.now(tz = JST)

		ds = int(difference.total_seconds())

		seconds = ds % 60
		minutes = math.floor(ds / 60) % 60
		hours = math.floor(ds / (60 * 60)) % 24
		days = math.floor(ds / (60 * 60 * 24))

		out = ""
		if days > 0: out += f"{days}d "
		if hours > 0: out += f"{hours}h "
		if minutes > 0: out += f"{minutes}m "

		return f"{out}{seconds}s"

	def ending_at(self, local = False):
		now = datetime.now(tz = LOCALTIME)
		ndate = now.strftime("%d %b")
		if self.end_date != None:
			ed = self.end_date_local() if local else self.end_date
			idate, itime = ed.strftime("%d %b"), ed.strftime("%H:%M")
			if idate == ndate:
				return itime
			else:
				return f"{idate} {itime}"