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import os
import re
import requests
import urllib.parse
from bs4 import BeautifulSoup
from flask import flash, redirect, render_template, request, session
from functools import wraps
# Display apology message in case of an error
def apology(message, code=400):
def escape(s):
"""
Escape special characters.
https://github.com/jacebrowning/memegen#special-characters
"""
for old, new in [("-", "--"), (" ", "-"), ("_", "__"), ("?", "~q"),
("%", "~p"), ("#", "~h"), ("/", "~s"), ("\"", "''")]:
s = s.replace(old, new)
return s
flash("Apologies, something went wrong...")
return render_template("apology.html", top=code, bottom=escape(message)), code
def deal_finder(item):
""" Scraping best deals on ebay for the user-specified item """
# https://www.networkinghowtos.com/howto/common-user-agent-list/
header = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36'}
# https://stackoverflow.com/questions/1549641/how-can-i-capitalize-the-first-letter-of-each-word-in-a-string
item_spelling = " ".join(word[0].upper() + word[1:] for word in item.split())
# Setup for displaying ebay results with the filter option "Price + Shipping: lowest first"
search_term = item.replace(" ", "+")
url = f"https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw={search_term}&_sacat=0&_sop=15"
webpage = requests.get(url, headers=header).text
soup = BeautifulSoup(webpage, "lxml")
offers = {}
# getting a list of all divs that contain the info on each individual offer
all_offers = soup.find_all("div", class_="s-item__info clearfix")
for item in all_offers:
# checking for matches in all caps too
if item.find(text=re.compile(item_spelling)) != None and item.find(text=re.compile(item_spelling.upper())) == None:
name = item.find(text=re.compile(item_spelling))
elif item.find(text=re.compile(item_spelling)) == None and item.find(text=re.compile(item_spelling.upper())) != None:
name = item.find(text=re.compile(item_spelling.upper()))
else:
continue
# getting the price of each item
if item.find("span", class_="s-item__price").string == None:
continue
price = item.find("span", class_="s-item__price").string.replace("$", "")
# getting the link to the page of each item
if item.a["href"] == None:
continue
link = item.a["href"]
# the following code for "offers" & "best_deals" is based on: https://www.youtube.com/watch?v=zAEfWiC_KBU&t=1232s
offers[name] = {"price": float(price.replace(",", "")), "link": link}
best_deals = sorted(offers.items(), key=lambda x: x[1]["price"])
return(best_deals)
def login_required(f):
"""
Decorate routes to require login.
https://flask.palletsprojects.com/en/1.1.x/patterns/viewdecorators/
"""
@wraps(f)
def decorated_function(*args, **kwargs):
if session.get("user_id") is None:
return redirect("/login")
return f(*args, **kwargs)
return decorated_function
def passw_requirements(password):
""" Password requirements for registrating an account """
pw_length = len(password)
if pw_length in range(6,25) and password.isalpha() == False and password.isnumeric() == False:
return "valid"
else:
return "invalid"
# Display a float as US-Dollar
def usd(value):
return f"${value:,.2f}"
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