380 lines
15 KiB
Python
380 lines
15 KiB
Python
import datetime
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import json
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import logging
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import os
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import random
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import re
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import string
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import sys
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import traceback
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from os import path, remove
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import background_task
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import jwt
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import pdfkit
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import requests as rq
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from django.conf import settings
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from django.core.mail import EmailMultiAlternatives
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from django.forms.models import model_to_dict
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from django.http import Http404
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from django.shortcuts import get_object_or_404
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from django.template.loader import render_to_string
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from django.utils.html import strip_tags
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from django.utils import timezone
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from google.auth.transport import requests
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from google.oauth2 import id_token
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from rest_framework import status
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from rest_framework.response import Response
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from .constants import *
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from .models import User, PrePlacementOffer, PlacementApplication, Placement, Student
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logger = logging.getLogger('db')
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def precheck(required_data=None):
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if required_data is None:
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required_data = []
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def decorator(view_func):
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def wrapper_func(request, *args, **kwargs):
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try:
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request_data = None
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if request.method == 'GET':
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request_data = request.GET
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elif request.method == 'POST':
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request_data = request.data
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if not len(request_data):
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request_data = request.POST
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if len(request_data):
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for i in required_data:
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if i not in request_data:
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return Response({'action': "Pre check", 'message': str(i) + " Not Found"},
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status=status.HTTP_400_BAD_REQUEST)
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else:
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return Response({'action': "Pre check", 'message': "Message Data not Found"},
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status=status.HTTP_400_BAD_REQUEST)
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return view_func(request, *args, **kwargs)
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except:
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logger.warning("Pre check: " + str(sys.exc_info()))
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return Response({'action': "Pre check", 'message': "Something went wrong"},
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status=status.HTTP_400_BAD_REQUEST)
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return wrapper_func
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return decorator
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def isAuthorized(allowed_users=None):
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if allowed_users is None:
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allowed_users = []
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def decorator(view_func):
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def wrapper_func(request, *args, **kwargs):
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try:
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headers = request.META
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if 'HTTP_AUTHORIZATION' in headers:
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token_id = headers['HTTP_AUTHORIZATION'][7:]
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idinfo = id_token.verify_oauth2_token(token_id, requests.Request(), CLIENT_ID)
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email = idinfo[EMAIL]
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user = get_object_or_404(User, email=email)
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if user:
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user.last_login_time = timezone.now()
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user.save()
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if len(set(user.user_type).intersection(set(allowed_users))) or allowed_users == '*':
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return view_func(request, user.id, user.email, user.user_type, *args, **kwargs)
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else:
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raise PermissionError("Access Denied. You are not allowed to use this service")
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else:
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raise PermissionError("Authorization Header Not Found")
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except PermissionError:
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return Response({'action': "Is Authorized?", 'message': 'Access Denied'},
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status=status.HTTP_401_UNAUTHORIZED)
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except Http404:
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return Response({'action': "Is Authorized?", 'message': "User Not Found. Contact CDC for more details"},
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status=status.HTTP_404_NOT_FOUND)
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except ValueError as e:
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logger.error("Problem with Google Oauth2.0 " + str(e))
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return Response({'action': "Is Authorized?", 'message': 'Problem with Google Sign In'},
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status=status.HTTP_401_UNAUTHORIZED)
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except:
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logger.warning("Is Authorized? " + str(sys.exc_info()))
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return Response(
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{'action': "Is Authorized?", 'message': "Something went wrong. Contact CDC for more details"},
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status=status.HTTP_400_BAD_REQUEST)
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return wrapper_func
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return decorator
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def generateRandomString():
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try:
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N = 15
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res = ''.join(random.choices(string.ascii_uppercase + string.ascii_lowercase + string.digits, k=N))
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return res
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except:
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return False
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def saveFile(file, location):
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prefix = generateRandomString()
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file_name = prefix + "_" + file.name.strip()
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file_name = re.sub(r'[\\/:*?"<>|]', '_', file_name)
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if not path.isdir(location):
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os.makedirs(location)
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destination_path = location + str(file_name)
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if path.exists(destination_path):
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remove(destination_path)
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with open(destination_path, 'wb+') as destination:
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for chunk in file.chunks():
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destination.write(chunk)
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return file_name
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@background_task.background(schedule=2)
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def sendEmail(email_to, subject, data, template, attachment_jnf_response=None):
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try:
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if not isinstance(data, dict):
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data = json.loads(data)
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html_content = render_to_string(template, data) # render with dynamic value
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text_content = strip_tags(html_content)
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email_from = settings.EMAIL_HOST_USER
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if type(email_to) is list:
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recipient_list = [str(email) for email in email_to]
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else:
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recipient_list = [str(email_to), ]
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msg = EmailMultiAlternatives(subject, text_content, email_from, recipient_list)
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msg.attach_alternative(html_content, "text/html")
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if attachment_jnf_response:
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logger.info(attachment_jnf_response)
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pdf = pdfkit.from_string(attachment_jnf_response['html'], False,
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options={"--enable-local-file-access": "", '--dpi': '96'})
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msg.attach(attachment_jnf_response['name'], pdf, 'application/pdf')
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msg.send()
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return True
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except:
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logger.error("Send Email: " + str(sys.exc_info()))
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return False
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def PlacementApplicationConditions(student, placement):
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try:
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selected_companies = PlacementApplication.objects.filter(student=student, selected=True)
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selected_companies_PSU = [i for i in selected_companies if i.placement.tier == 'psu']
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PPO = PrePlacementOffer.objects.filter(student=student, accepted=True)
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# find length of PPO
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if len(selected_companies) + len(PPO) >= MAX_OFFERS_PER_STUDENT:
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raise PermissionError("Max Applications Reached for the Season")
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if len(selected_companies_PSU) > 0:
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raise PermissionError('Selected for PSU Can\'t apply anymore')
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if placement.tier == 'psu':
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return True, "Conditions Satisfied"
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for i in selected_companies:
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if int(i.placement.tier) < int(placement.tier):
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return False, "Can't apply for this tier"
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if student.degree != 'bTech' and not placement.rs_eligible:
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raise PermissionError("Can't apply for this placement")
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return True, "Conditions Satisfied"
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except PermissionError as e:
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return False, e
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except:
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logger.warning("Utils - PlacementApplicationConditions: " + str(sys.exc_info()))
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return False, "_"
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def getTier(compensation_gross, is_psu=False):
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try:
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if is_psu:
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return True, 'psu'
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if compensation_gross < 0:
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raise ValueError("Negative Compensation")
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elif compensation_gross < 600000: # Tier 7 If less than 600,000
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return True, "7"
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# Tier 6 If less than 800,000 and greater than or equal to 600,000
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elif compensation_gross < 800000:
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return True, "6"
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# Tier 5 If less than 1,000,000 and greater than or equal to 800,000
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elif compensation_gross < 1000000:
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return True, "5"
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# Tier 4 If less than 1,200,000 and greater than or equal to 1,000,000
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elif compensation_gross < 1200000:
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return True, "4"
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# Tier 3 If less than 1,500,000 and greater than or equal to 1,200,000
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elif compensation_gross < 1500000:
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return True, "3"
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# Tier 2 If less than 1,800,000 and greater than or equal to 1,500,000
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elif compensation_gross < 1800000:
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return True, "2"
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# Tier 1 If greater than or equal to 1,800,000
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elif compensation_gross >= 1800000:
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return True, "1"
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else:
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raise ValueError("Invalid Compensation")
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except ValueError as e:
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logger.warning("Utils - getTier: " + str(sys.exc_info()))
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return False, e
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except:
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logger.warning("Utils - getTier: " + str(sys.exc_info()))
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return False, "_"
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def generateOneTimeVerificationLink(email, opening_id, opening_type):
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try:
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token_payload = {
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"email": email,
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"opening_id": opening_id,
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"opening_type": opening_type,
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'exp': datetime.datetime.utcnow() + datetime.timedelta(hours=EMAIL_VERIFICATION_TOKEN_TTL)
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}
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token = jwt.encode(token_payload, os.environ.get("EMAIL_VERIFICATION_SECRET_KEY"), algorithm="HS256")
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link = LINK_TO_EMAIl_VERIFICATION_API.format(token=token)
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return True, link
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except:
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logger.warning("Utils - generateOneTimeVerificationLink: " + str(sys.exc_info()))
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return False, "_"
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def verify_recaptcha(request):
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try:
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data = {
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'secret': settings.RECAPTCHA_SECRET_KEY,
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'response': request
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}
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r = rq.post('https://www.google.com/recaptcha/api/siteverify', data=data)
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result = r.json()
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if not result['success']:
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logger.warning("Utils - verify_recaptcha: " + str(result))
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return result['success']
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except:
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# get exception line number
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logger.warning("Utils - verify_recaptcha: " + str(sys.exc_info()))
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return False, "_"
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def opening_description_table_html(opening):
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# check typing of opening
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if isinstance(opening, Placement):
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details = model_to_dict(opening, fields=[field.name for field in Placement._meta.fields],
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exclude=EXCLUDE_IN_PDF)
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# check typing of opening is query dict
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else: #if isinstance(opening, QueryDict):
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details = opening
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keys = list(details.keys())
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newdetails = {}
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for key in keys:
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if isinstance(details[key], list):
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details[key] = {"details": details[key], "type": ["list"]}
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if key in SPECIAL_FORMAT_IN_PDF:
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if key == 'website':
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details[key] = {"details": details[key], "type": ["link"]}
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else:
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details[key] = {"details": [item for item in details[key]["details"]], "type": ["list", "link"],
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"link": PDF_FILES_SERVING_ENDPOINT + opening.id + "/"}
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new_key = key.replace('_', ' ')
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if new_key.endswith(' names'):
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new_key = new_key[:-6]
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new_key = new_key.capitalize()
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newdetails[new_key] = details[key]
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imagepath = os.path.abspath('./templates/image.png')
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data = {
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"data": newdetails,
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"imgpath": imagepath
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}
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return render_to_string(COMPANY_JNF_RESPONSE_TEMPLATE, data)
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def placement_eligibility_filters(student, placements):
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try:
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filtered_placements = []
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for placement in placements.iterator():
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if PlacementApplicationConditions(student, placement)[0]:
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filtered_placements.append(placement)
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return filtered_placements
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except:
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logger.warning("Utils - placement_eligibility_filters: " + str(sys.exc_info()))
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return placements
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@background_task.background(schedule=2)
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def send_opening_notifications(placement_id):
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try:
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placement = get_object_or_404(Placement, id=placement_id)
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students = Student.objects.all()
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for student in students.iterator():
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if PlacementApplicationConditions(student, placement)[0]:
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try:
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student_user = get_object_or_404(User, id=student.id)
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subject = NOTIFY_STUDENTS_OPENING_TEMPLATE_SUBJECT.format(company_name=placement.company_name)
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data = {
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"company_name": placement.company_name,
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"opening_type": 'Placement',
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"designation": placement.designation,
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"deadline": placement.deadline_datetime.strftime("%Y-%m-%d %H:%M:%S"),
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"link": PLACEMENT_OPENING_URL.format(id=placement.id)
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}
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sendEmail(student_user.email, subject, data, NOTIFY_STUDENTS_OPENING_TEMPLATE)
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except Http404:
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logger.warning('Utils - send_opening_notifications: user not found : ' + student.id)
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except Exception as e:
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logger.warning('Utils - send_opening_notifications: For Loop' + str(e))
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except:
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logger.warning('Utils - send_opening_notifications: ' + str(sys.exc_info()))
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return False
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def exception_email(opening):
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opening = opening.dict()
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data = {
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"designation": opening["designation"],
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"opening_type": PLACEMENT,
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"company_name": opening["company_name"],
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}
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pdfhtml = opening_description_table_html(opening)
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name = opening["company_name"]+'_jnf_response.pdf'
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attachment_jnf_respone = {
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"name": name,
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"html": pdfhtml,
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}
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sendEmail(CDC_MAIl_ADDRESS, COMPANY_OPENING_ERROR_TEMPLATE.format(company_name=opening["company_name"]), data,
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COMPANY_OPENING_SUBMITTED_TEMPLATE, attachment_jnf_respone)
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def store_all_files(request):
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files = request.FILES
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data = request.data
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# save all the files
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if files:
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# company details pdf
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for file in files.getlist(COMPANY_DETAILS_PDF):
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file_location = STORAGE_DESTINATION_COMPANY_ATTACHMENTS + "temp" + '/'
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saveFile(file, file_location)
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# compensation details pdf
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for file in files.getlist(COMPENSATION_DETAILS_PDF):
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file_location = STORAGE_DESTINATION_COMPANY_ATTACHMENTS + "temp" + '/'
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saveFile(file, file_location)
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# selection procedure details pdf
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for file in files.getlist(SELECTION_PROCEDURE_DETAILS_PDF):
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file_location = STORAGE_DESTINATION_COMPANY_ATTACHMENTS + "temp" + '/'
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saveFile(file, file_location)
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# description pdf
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for file in files.getlist(DESCRIPTION_PDF):
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file_location = STORAGE_DESTINATION_COMPANY_ATTACHMENTS + "temp" + '/'
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saveFile(file, file_location) |