From 158851f6e4476da860baf7b381e849e7ae33b103 Mon Sep 17 00:00:00 2001
From: karthikmurakonda <karthik.murakonda14@gmail.com>
Date: Thu, 19 Oct 2023 06:30:46 +0530
Subject: [PATCH] create new endpoint to expose eligible students for an
 opeining id

---
 CDC_Backend/APIs/adminUrls.py  |  1 +
 CDC_Backend/APIs/adminViews.py | 25 +++++++++++++++++
 CDC_Backend/APIs/constants.py  |  1 +
 CDC_Backend/APIs/utils.py      | 51 ++++++++++++++++++++++++++++++++++
 4 files changed, 78 insertions(+)

diff --git a/CDC_Backend/APIs/adminUrls.py b/CDC_Backend/APIs/adminUrls.py
index da8acd6..5afb5c7 100644
--- a/CDC_Backend/APIs/adminUrls.py
+++ b/CDC_Backend/APIs/adminUrls.py
@@ -16,4 +16,5 @@ urlpatterns = [
     path('addPPO/', adminViews.addPPO, name="Add PPO"),
     path('getStudentApplication/', adminViews.getStudentApplication, name="Get student application"),
     path('getStats/', adminViews.getStats, name="Get Stats"),
+    path('getEligibleStudents/', adminViews.get_eligible_students, name="Get Eligible Students"),
 ]
diff --git a/CDC_Backend/APIs/adminViews.py b/CDC_Backend/APIs/adminViews.py
index 429260e..db7f79f 100644
--- a/CDC_Backend/APIs/adminViews.py
+++ b/CDC_Backend/APIs/adminViews.py
@@ -750,3 +750,28 @@ def getStats(request, id, email, user_type):
         print(sys.exc_info())
         return Response({'action': "Get Stats", 'message': "Something Went Wrong"},
                         status=status.HTTP_400_BAD_REQUEST)
+
+
+@api_view(['GET'])
+@isAuthorizedService()
+@precheck(required_data=[OPENING_ID])
+def get_eligible_students(request):
+    try:
+        data = request.GET
+        opening_id = data[OPENING_ID]
+        if  OPENING_TYPE  in data:
+            opening_type= data[OPENING_TYPE]
+        else:
+            opening_type= "Placement"
+        eligible_students=get_eligible_emails(opening_id=opening_id, opening_type=opening_type)
+        return Response({'action': "Get Eligible Students", 'message': "Eligible Students Fetched",
+                         'eligible_students': eligible_students},
+                        status=status.HTTP_200_OK)
+    except Http404:
+        return Response({'action': "Get Eligible Students", 'message': "Opening Not Found"},
+                        status=status.HTTP_404_NOT_FOUND)
+    except:
+        logger.warning("Get Eligible Students: " + str(sys.exc_info()))
+        return Response({'action': "Get Eligible Students", 'message': "Something Went Wrong"},
+                        status=status.HTTP_400_BAD_REQUEST)
+    
\ No newline at end of file
diff --git a/CDC_Backend/APIs/constants.py b/CDC_Backend/APIs/constants.py
index 12ac4fb..267d0e9 100644
--- a/CDC_Backend/APIs/constants.py
+++ b/CDC_Backend/APIs/constants.py
@@ -100,6 +100,7 @@ EMAIL = "email"
 STUDENT = 'student'
 ADMIN = 'admin'
 SUPER_ADMIN = 's_admin'
+SERVICE= 'service'
 COMPANY = 'company'
 TIER = 'tier'
 # To be Configured Properly
diff --git a/CDC_Backend/APIs/utils.py b/CDC_Backend/APIs/utils.py
index 10f1c0c..36e0471 100644
--- a/CDC_Backend/APIs/utils.py
+++ b/CDC_Backend/APIs/utils.py
@@ -151,6 +151,26 @@ def isAuthorized(allowed_users=None):
 
     return decorator
 
+def isAuthorizedService():
+    def decorator(view_func):
+        def wrapper_func(request, *args, **kwargs):
+            try:
+                headers = request.META
+                if 'HTTP_AUTHORIZATION' in headers:
+                    token_id = headers['HTTP_AUTHORIZATION'][7:]
+                    jwt.decode(token_id, os.environ.get("SERVICE_SECRET_KEY"), algorithms="HS256")
+                    return view_func(request, *args, **kwargs)
+                else:
+                    raise PermissionError("Authorization Header Not Found")
+            except:
+                logger.warning("Is Authorized? " + str(sys.exc_info()))
+                return Response(
+                    {'action': "Is Authorized?", 'message': "Something went wrong. Contact CDC for more details"},
+                    status=status.HTTP_400_BAD_REQUEST)
+        return wrapper_func
+
+    return decorator
+
 
 def generateRandomString():
     try:
@@ -435,6 +455,37 @@ def send_opening_notifications(opening_id, opening_type=PLACEMENT):
         logger.warning('Utils - send_opening_notifications: ' + str(sys.exc_info()))
         return False
 
+def get_eligible_emails(opening_id, opening_type=PLACEMENT):
+    try:
+       # print(opening_id, opening_type)
+        if opening_type == PLACEMENT:
+            opening = get_object_or_404(Placement, id=opening_id)
+        else:
+            opening = get_object_or_404(Internship, id=opening_id)
+        emails=[]
+        students = Student.objects.all()
+        for student in students.iterator():
+            if student.branch in opening.allowed_branch:
+                if student.degree == 'bTech' or opening.rs_eligible is True:
+                    if (isinstance(opening,Placement) and PlacementApplicationConditions(student, opening)[0]) or (
+                        isinstance(opening,Internship) and InternshipApplicationConditions(student, opening)[0]):
+                        try:
+                            student_user = get_object_or_404(User, id=student.id)
+                            # check if he applied
+                            if opening_type == PLACEMENT:
+                                if PlacementApplication.objects.filter(student=student, placement=opening).exists():
+                                    continue
+                            else:
+                                if InternshipApplication.objects.filter(student=student, internship=opening).exists():
+                                    continue
+                            emails.append(student_user.email)
+                        except Exception as e:
+                            logger.warning('Utils - send_opening_notifications: For Loop' + str(e))
+                            return False
+        return True, emails
+    except:
+        logger.warning('Utils - send_opening_notifications: ' + str(sys.exc_info()))
+        return False
 
 def exception_email(opening):
     opening = opening.dict()