Added Verify Email Functionality

CDC_Backend/APIs/adminViews.py

@@ -16,7 +16,7 @@ def markStatus(request, id, email, user_type):
         # Getting all application from db for this opening
         applications = PlacementApplication.objects.filter(placement_id=data[OPENING_ID])
         for i in data[STUDENT_LIST]:
-            application = applications.filter(student_id=i[STUDENT_ID])  # Filtering student's application
+            application = applications.filter(student__roll_no=i[STUDENT_ID])  # Filtering student's application
             if len(application) > 0:
                 application = application[0]
                 application.selected = True if i[STUDENT_SELECTED] == "true" else False

CDC_Backend/APIs/companyUrls.py

@@ -4,4 +4,5 @@ from . import companyViews
 
 urlpatterns = [
     path('addPlacement/', companyViews.addPlacement, name="Add Placement"),
+    path('verifyEmail/', companyViews.verifyEmail, name="Verify Email"),
 ]

CDC_Backend/APIs/companyViews.py

@@ -1,5 +1,5 @@
 import json
-from datetime import datetime
+import datetime
 
 from rest_framework.decorators import api_view
 
@@ -178,7 +178,7 @@ def addPlacement(request):
         else:
             raise ValueError('Invalid compensation gross')
         # Convert to date object
-        opening.tentative_date_of_joining = datetime.strptime(data[TENTATIVE_DATE_OF_JOINING], '%d-%m-%Y').date()
+        opening.tentative_date_of_joining = datetime.datetime.strptime(data[TENTATIVE_DATE_OF_JOINING], '%d-%m-%Y').date()
 
         # Only Allowing Fourth Year for Placement
         opening.allowed_batch = [FOURTH_YEAR, ]
@@ -202,15 +202,18 @@ def addPlacement(request):
 
         opening.save()
 
+
+
+        stat, link = generateOneTimeVerificationLink(opening.email, opening.id, "Placement")
+        if not stat:
+            raise RuntimeError("Error in generating one time verification link for placement")
         data = {
             "designation": opening.designation,
-            "opening_type": PLACEMENT,
+            "one_time_link": link
-            "opening_link": PLACEMENT_OPENING_URL.format(id=opening.id),  # Some Changes here too
-            "company_name": opening.company_name
         }
 
-        sendEmail(opening.email, COMPANY_OPENING_SUBMITTED_TEMPLATE_SUBJECT.format(id=opening.id), data,
+        sendEmail(opening.email, COMPANY_EMAIl_VERIFICATION_TEMPLATE_SUBJECT, data,
-                  COMPANY_OPENING_SUBMITTED_TEMPLATE)
+                  COMPANY_EMAIL_VERIFICATION_TEMPLATE)
 
         return Response({'action': "Add Placement", 'message': "Placement Added Successfully"},
                         status=status.HTTP_200_OK)
@@ -222,3 +225,45 @@ def addPlacement(request):
         logger.warning("Add New Placement: " + str(sys.exc_info()))
         return Response({'action': "Add Placement", 'message': "Something went wrong"},
                         status=status.HTTP_400_BAD_REQUEST)
+
+@api_view(['POST'])
+@precheck([TOKEN])
+def verifyEmail(request):
+    try:
+        data = request.data
+        token = data[TOKEN]
+        # decode token
+        decoded_token = jwt.decode(token, os.environ.get("EMAIL_VERIFICATION_SECRET_KEY"), algorithms=['HS256'])
+        # get email, opening_id, opening_type from token
+        email = decoded_token['email']
+        opening_id = decoded_token['opening_id']
+        opening_type = decoded_token['opening_type']
+        # get opening based on opening_type and opening_id
+        if opening_type == PLACEMENT:
+            opening = get_object_or_404(Placement, id=opening_id)
+            if email != opening.email:
+                raise ValueError("Invalid Email")
+            opening.email_verified = True
+            opening.save()
+            data = {
+                "designation": opening.designation,
+                "opening_type": PLACEMENT,
+                "opening_link": PLACEMENT_OPENING_URL.format(id=opening.id),  # Some Changes here too
+                "company_name": opening.company_name
+            }
+            sendEmail(opening.email, COMPANY_OPENING_SUBMITTED_TEMPLATE_SUBJECT.format(id=opening.id), data,
+                      COMPANY_OPENING_SUBMITTED_TEMPLATE)
+        else:
+            raise ValueError('Invalid opening type')
+        return Response({'action': "Verify Email", 'message': "Email Verified Successfully"},
+                        status=status.HTTP_200_OK)
+    except Http404:
+        return Response({'action': "Verify Email", 'message': "Opening Not Found"},
+                        status=status.HTTP_404_NOT_FOUND)
+    except ValueError as e:
+        return Response({'action': "Verify Email", 'message': str(e)},
+                        status=status.HTTP_400_BAD_REQUEST)
+    except:
+        logger.warning("Verify Email: " + str(sys.exc_info()))
+        return Response({'action': "Verify Email", 'message': "Something went wrong"},
+                        status=status.HTTP_400_BAD_REQUEST)

CDC_Backend/APIs/constants.py

@@ -39,13 +39,12 @@ TOTAL_BATCHES = 4  # Total No of Batches
 CLIENT_ID = "956830229554-290mirc16pdhd5j7ph7v7ukibo4t1qcp.apps.googleusercontent.com"  # Google Login Client ID
 
 # To be Configured Properly
-PLACEMENT_OPENING_URL = "https://www.googleapis.com/auth/adwords/{id}"
+PLACEMENT_OPENING_URL = "https://www.googleapis.com/auth/adwords/{id}" # On frontend, this is the URL to be opened
 LINK_TO_STORAGE_COMPANY_ATTACHMENT = "https://storage.googleapis.com/cdc-backend-attachments/company_attachments/"
 LINK_TO_STORAGE_RESUME = "https://storage.googleapis.com/cdc-backend-attachments/resume/"
 LINK_TO_APPLICATIONS_CSV = "https://storage.googleapis.com/cdc-backend-attachments/applications-csv/"
+LINK_TO_EMAIl_VERIFICATION_API = "https://api.sendgrid.com/v3/mail/send?token={token}"
 
-
-TOKEN = "token_id"
 EMAIL = "email"
 
 STUDENT = 'student'
@@ -55,13 +54,14 @@ COMPANY = ''
 # To be Configured Properly
 FOURTH_YEAR = '2018'
 MAX_OFFERS_PER_STUDENT = 2
+EMAIL_VERIFICATION_TOKEN_TTL = 48 # in hours
 
 
 STORAGE_DESTINATION_RESUMES = "./Storage/Resumes/"
 STORAGE_DESTINATION_COMPANY_ATTACHMENTS = './Storage/Company_Attachments/'
 STORAGE_DESTINATION_APPLICATION_CSV = './Storage/Application_CSV/'
 
-
+TOKEN = 'token'
 RESUME_FILE_NAME = 'resume_file_name'
 
 APPLICATION_ID = "application_id"
@@ -123,14 +123,16 @@ STUDENT_ID = "student_id"
 STUDENT_SELECTED = "student_selected"
 
 
-COMPANY_OPENING_SUBMITTED_TEMPLATE_SUBJECT = "Notification Submitted - {id} - CDC IIT Dharwad"
+COMPANY_OPENING_SUBMITTED_TEMPLATE_SUBJECT = "Notification Submitted - {id} - Career Development Cell, IIT Dharwad"
 STUDENT_APPLICATION_STATUS_TEMPLATE_SUBJECT = 'Application Status : {company_name} - {id}'
 STUDENT_APPLICATION_SUBMITTED_TEMPLATE_SUBJECT = 'CDC - Application Submitted - {company_name}'
+COMPANY_EMAIl_VERIFICATION_TEMPLATE_SUBJECT = 'Email Verification - Career Development Cell, IIT Dharwad'
 
 STUDENT_APPLICATION_SUBMITTED_TEMPLATE = 'student_application_submitted.html'
 COMPANY_OPENING_SUBMITTED_TEMPLATE = 'company_opening_submitted.html'
 STUDENT_APPLICATION_STATUS_SELECTED_TEMPLATE = 'student_application_status_selected.html'
 STUDENT_APPLICATION_STATUS_NOT_SELECTED_TEMPLATE = 'student_application_status_not_selected.html'
+COMPANY_EMAIL_VERIFICATION_TEMPLATE = 'company_email_verification.html'
 
 APPLICATION_CSV_COL_NAMES = ['Applied At', 'Roll No.', 'Name', 'Email', 'Phone Number', 'Branch', 'Batch', 'CPI',
                              'Resume', 'Selected', ]

CDC_Backend/APIs/utils.py

@@ -1,9 +1,11 @@
+import datetime
 import logging
 import os
 import random
 import re
 import string
 import sys
+import jwt
 from os import path, remove
 
 import background_task
@@ -104,7 +106,7 @@ def isAuthorized(allowed_users=None):
 def generateRandomString():
     try:
         N = 15
-        res = ''.join(random.choices(string.ascii_uppercase +string.ascii_lowercase+ string.digits, k=N))
+        res = ''.join(random.choices(string.ascii_uppercase + string.ascii_lowercase + string.digits, k=N))
         return res
     except:
         return False
@@ -214,3 +216,20 @@ def getTier(compensation_gross, is_psu=False):
         print(sys.exc_info())
         logger.warning("Utils - getTier: " + str(sys.exc_info()))
         return False, "_"
+
+
+def generateOneTimeVerificationLink(email, opening_id, opening_type):
+    try:
+        token_payload = {
+            "email": email,
+            "opening_id": opening_id,
+            "opening_type": opening_type,
+            'exp': datetime.datetime.utcnow() + datetime.timedelta(hours=EMAIL_VERIFICATION_TOKEN_TTL)
+        }
+        token = jwt.encode(token_payload, os.environ.get("EMAIL_VERIFICATION_SECRET_KEY"), algorithm="HS256")
+        link = LINK_TO_EMAIl_VERIFICATION_API.format(token=token)
+        return True, link
+    except:
+        print(sys.exc_info())
+        logger.warning("Utils - generateOneTimeVerificationLink: " + str(sys.exc_info()))
+        return False, "_"

CDC_Backend/templates/company_email_verification.html

@@ -32,7 +32,7 @@
                    style="width:602px;border-collapse:collapse;border:1px solid #334878;border-spacing:0;text-align:left;">
                 <tr>
                     <td align="center" style="padding:40px 0 30px 0;background:#334878;">
-                        <img src="./image.png" alt="" width="200" style="height:auto;display:block;"/>
+                        <img src="https://drive.google.com/uc?id=1QTA6dB7jnsZfU1kzyUqfD_2V5xODpWFt" alt="" width="200" style="height:auto;display:block;"/>
                     </td>
                 </tr>
                 <tr>
@@ -41,9 +41,9 @@
                                style="width:100%;border-collapse:collapse;border:0;border-spacing:0;">
                             <tr>
                                 <td style="padding:0 0 36px 0;color:#153643;">
-                                    <h1 style="font-size:24px;margin:0 0 20px 0;font-family: 'Roboto', sans-serif;">Hi,</h1>
+
                                     <p style="margin:0 0 12px 0;font-size:16px;line-height:24px;font-family: 'Roboto', sans-serif;">
-                                        We have received your Job Notification for {{designation}}. Kindly verify your email by clicking <a href={{ one_time_link }}>here</a>.
+                                        We have received your Job Notification. Kindly verify your email by clicking <a href="{{ one_time_link }}">here</a>.
                                     </p>
                                 </td>
                             </tr>

CDC_Backend/templates/company_opening_submitted.html

@@ -32,7 +32,7 @@
                    style="width:602px;border-collapse:collapse;border:1px solid #334878;border-spacing:0;text-align:left;">
                 <tr>
                     <td align="center" style="padding:40px 0 30px 0;background:#334878;">
-                        <img src="./image.png" alt="" width="200" style="height:auto;display:block;"/>
+                        <img src="https://drive.google.com/uc?id=1QTA6dB7jnsZfU1kzyUqfD_2V5xODpWFt" alt="" width="200" style="height:auto;display:block;"/>
                     </td>
                 </tr>
                 <tr>

CDC_Backend/templates/student_application_status_not_selected.html

@@ -31,7 +31,7 @@
                    style="width:602px;border-collapse:collapse;border:1px solid #334878;border-spacing:0;text-align:left;">
                 <tr>
                     <td align="center" style="padding:40px 0 30px 0;background:#334878;">
-                        <img src="./image.png" alt="" width="200" style="height:auto;display:block;"/>
+                        <img src="https://drive.google.com/uc?id=1QTA6dB7jnsZfU1kzyUqfD_2V5xODpWFt" alt="" width="200" style="height:auto;display:block;"/>
                     </td>
                 </tr>
                 <tr>

CDC_Backend/templates/student_application_status_selected.html

@@ -31,7 +31,7 @@
                    style="width:602px;border-collapse:collapse;border:1px solid #334878;border-spacing:0;text-align:left;">
                 <tr>
                     <td align="center" style="padding:40px 0 30px 0;background:#334878;">
-                        <img src="./image.png" alt="" width="200" style="height:auto;display:block;"/>
+                        <img src="https://drive.google.com/uc?id=1QTA6dB7jnsZfU1kzyUqfD_2V5xODpWFt" alt="" width="200" style="height:auto;display:block;"/>
                     </td>
                 </tr>
                 <tr>

CDC_Backend/templates/student_application_submitted.html

@@ -32,7 +32,7 @@
                    style="width:602px;border-collapse:collapse;border:1px solid #334878;border-spacing:0;text-align:left;">
                 <tr>
                     <td align="center" style="padding:40px 0 30px 0;background:#334878;">
-                        <img src="./image.png" alt="" width="200" style="height:auto;display:block;"/>
+                        <img src="https://drive.google.com/uc?id=1QTA6dB7jnsZfU1kzyUqfD_2V5xODpWFt" alt="" width="200" style="height:auto;display:block;"/>
                     </td>
                 </tr>
                 <tr>

requirements.txt

@@ -28,6 +28,7 @@ pyasn1-modules==0.2.8
 pylint==2.12.2
 python-dotenv==0.19.2
 pytz==2021.3
+PyJWT==2.0.1
 requests==2.26.0
 rsa==4.8
 six==1.16.0