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302 lines
14 KiB
302 lines
14 KiB
from django.shortcuts import render
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from django.http import Http404
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import redis
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from redis_app.utils.index import create_index
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from redis_app.utils.model import *
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# This model only helps us the development part to set rules on objects (we do not use the django model to save objects in it)
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from .models import Person
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redis_connection = redis.Redis(host='localhost', port=6379, decode_responses=True)
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pub_sub = redis_connection.pubsub()
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create_index(redis_connection=redis_connection)
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def home(request):
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person = request.session.get("person", "")
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return render(request, 'home.html', {'person': person})
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def details(request, course_id, error_message='', success_message=''):
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person = request.session.get("person", "")
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if isExpired(course_id):
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raise Http404("Course has expired... Get faster next time!")
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course = getCourse(course_id)
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if not course:
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raise Http404("Course does not exist")
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course['id'] = course_id
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teacher = getPerson(course['teacher'])
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if not teacher:
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raise Http404("Teacher does not exist")
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course['teacher_name'] = teacher['name']
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register = isPersonRegisteredToCourse(course, person)
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full = isCourseFull(course)
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return render(request, 'details.html', {'course': course, 'person': person, 'register': register, 'full': full, 'error_message': error_message, 'success_message': success_message})
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def register(request):
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if request.method == 'POST':
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person = register_redis(request.POST['name'], request.POST['role'])
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if not person:
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return render(request, 'register.html', {'person': Person(name="", role=""), "error_message": "This user already exists!"})
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request.session["person"] = person
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return home(request)
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return render(request, 'register.html', {'person': Person(name="", role=""), "error_message": "The form has been wrongly filled!"})
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def login(request):
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if request.method == 'POST':
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person = login_redis(request.POST["name"], request.POST["role"])
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if not person:
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "No user found!"})
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request.session["person"] = person
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return home(request)
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return login_form(request)
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def register_form(request):
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return render(request, 'register.html', {'person': Person(name="", role="")})
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def login_form(request):
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return render(request, 'login.html', {'person': Person(name="", role="")})
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def logout(request):
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request.session["person"] = ""
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return render(request, 'login.html', {'person': Person(name="", role="")})
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def courses(request, error_message="", success_message=""):
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person = request.session.get("person", "")
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if person == "":
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
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person_id = getPersonId(person["name"], person["role"]).split(":")[1]
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courses = getCoursesFromPerson(person_id)
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return render(request, 'courses.html', {'person': person, 'courses': courses, 'error_message': error_message, 'success_message': success_message})
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def change_profile(request):
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person = request.session.get("person", "")
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if person == '':
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
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if request.method == 'POST':
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person_name = request.POST['name']
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person_role = request.POST['role']
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person_id = getPersonId(person["name"], person["role"])
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if not person_id:
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return render(request, 'profile.html', {'person': person, "error_message": "Internal error: No user found!"})
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redis_connection.hmset(person_id, mapping={"name": person_name, "role": person_role})
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person["name"] = person_name
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person["role"] = person_role
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request.session["person"] = person
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return render(request, 'profile.html', {'person': person, 'success_message': 'Your profile has been successfully changed!'})
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return login_form(request)
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def profile(request):
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person = request.session.get("person", "")
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if person == '':
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
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return render(request, 'profile.html', {'person': person})
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def delete_course_view(request, course_id):
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if isExpired(course_id):
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raise Http404("Course has expired... Get faster next time!")
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res = delete_course(course_id)
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if not res:
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return courses(request)
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publish(course_id, f"DELETE: Course:{course_id} has been deleted!")
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return courses(request)
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def publish_message(request):
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person = request.session.get("person", "")
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courses_fetched = getCoursesFromPerson(getPersonId(person['name'], person['role']).split(":")[1])
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for course in courses_fetched:
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course['id'] = getCourseId(course).split(':')[1]
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if not courses_fetched:
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return courses(request, 'You don\'t have any course. You must create one to publish a message!')
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return render(request, 'publish_message.html', {'person': person, 'courses': courses_fetched, 'success_message': 'The message has been successfully sent!'})
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def publish_message_form(request):
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person = request.session.get("person", "")
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if person == '':
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
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if person['role'] == 'Student':
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return render(request, 'publish_message.html', {'person': person, "error_message": "The form has been wrongly filled!"})
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if request.method == 'POST':
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course_id = request.POST['course_id']
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message = request.POST['message']
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course = redis_connection.hgetall(f'course:{course_id}')
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if not course:
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raise Http404("Course not found")
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publish(course_id, message)
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return publish_message(request)
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return render(request, 'publish_message.html', {'person': person, "error_message": "The form has been wrongly filled!"})
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def create_course_view(request):
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person = request.session.get("person", "")
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return render(request, 'create.html', {'person': person})
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def update_course_view(request, course_id):
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person = request.session.get("person", "")
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if isExpired(course_id):
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raise Http404("Course has expired... Get faster next time!")
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course = redis_connection.hgetall(f"course:{course_id}")
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if not course:
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raise Http404("Course does not exist")
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course_id = getCourseId2(course['title'], course['teacher'])
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if course_id == False:
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raise Http404("Course does not exist")
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course['id'] = course_id.split(":")[1]
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return render(request, 'update.html', {'person': person, 'course': course})
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def create_course_form(request):
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person = request.session.get("person", "")
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if person == '':
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
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if request.method == 'POST':
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course_title = request.POST['title']
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course_summary = request.POST['summary']
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course_level = request.POST['level']
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course_places = request.POST['places']
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course_teacher = getPersonId(person['name'], person['role']).split(":")[1]
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create_course(course_title, course_summary, course_level, course_places, course_teacher)
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return courses(request, "", "The course has been successfully created!")
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return render(request, 'create.html', {'person': person, "error_message": "The form has been wrongly filled!"})
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def update_course_form(request, course_id):
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person = request.session.get("person", "")
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if isExpired(course_id):
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raise Http404("Course has expired... Get faster next time!")
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if person == '':
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
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if request.method == 'POST':
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course_title = request.POST['title']
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course_summary = request.POST['summary']
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course_level = request.POST['level']
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course_places = request.POST['places']
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course_teacher = getPersonId(person['name'], person['role']).split(":")[1]
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course = redis_connection.hgetall(f"course:{course_id}")
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course["id"] = course_id
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course_students = course.get("students", "")
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try:
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if course_students and len(course_students.split(',')) >= int(course_places):
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return render(request, 'update.html', {'person': person, "error_message": "There's too many students registered to decrease the number of places that much!", "course": course})
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except:
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return render(request, 'update.html', {'person': person, "error_message": "The number of places has not the right format!", "course": course})
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update_course(course_id, course_title, course_summary, course_level, course_places, course_teacher)
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return courses(request, "", "The course has been successfully changed!")
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return render(request, 'update.html', {'person': person, "error_message": "The form has been wrongly filled!", "course": course})
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def course_register_view(request, course_id):
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person = request.session.get("person", "")
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if isExpired(course_id):
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raise Http404("Course has expired... Get faster next time!")
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person_id = getPersonId(person["name"], person["role"]).split(":")[1]
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if not person_id:
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raise Http404("Person not found")
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course = redis_connection.hgetall(f"course:{course_id}")
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if not course:
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raise Http404("Course not found")
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course["id"] = course_id
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teacher = redis_connection.hgetall(f"person:{course['teacher']}")
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if not teacher:
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raise Http404("Teacher does not exist")
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course['teacher_name'] = teacher['name']
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if course_register(course_id, person_id):
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return details(request, course_id, '', 'Successfully registered to the course.')
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return details(request, course_id, "Could not register to the course. Try again later.")
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def course_unregister_view(request, course_id):
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person = request.session.get("person", "")
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if person == "":
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
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if isExpired(course_id):
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raise Http404("Course has expired... Get faster next time!")
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person_id = getPersonId(person["name"], person["role"]).split(":")[1]
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if not person_id:
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raise Http404("Person not found")
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course = redis_connection.hgetall(f"course:{course_id}")
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if not course:
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raise Http404("Course not found")
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course["id"] = course_id
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teacher = redis_connection.hgetall(f"person:{course['teacher']}")
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if not teacher:
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raise Http404("Teacher does not exist")
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course['teacher_name'] = teacher['name']
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if course_unregister(course_id, person_id):
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return details(request, course_id, '', "Successfully unregistered to the course.")
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return details(request, course_id, "Could not unregister to the course. Try again later.")
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def search(keywords):
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courses = []
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for keyword in keywords.split(' '):
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if not keyword: # When the users end his keywords with a ' '
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continue
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title_query = f"@title:{keyword}"
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summary_query = f"@summary:{keyword}"
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level_query = f"@level:{keyword}"
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teacher_query = f"@teacher:{keyword}"
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title_results = redis_connection.execute_command('FT.SEARCH', 'idx:courses', title_query)
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summary_results = redis_connection.execute_command('FT.SEARCH', 'idx:courses', summary_query)
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level_results = redis_connection.execute_command('FT.SEARCH', 'idx:courses', level_query)
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teacher_results = redis_connection.execute_command('FT.SEARCH', 'idx:courses', teacher_query)
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for i in range(1, len(title_results), 2):
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courses.append(title_results[i])
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for i in range(1, len(summary_results), 2):
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courses.append(summary_results[i])
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for i in range(1, len(level_results), 2):
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courses.append(level_results[i])
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for i in range(1, len(teacher_results), 2):
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courses.append(teacher_results[i])
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return courses
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def search_view(request):
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person = request.session.get("person", "")
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return render(request, 'search.html', {'person': person})
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def search_form(request):
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person = request.session.get("person", "")
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if request.method == 'POST':
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keywords = request.POST['keywords']
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courses = []
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courses_id = search(keywords)
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for course_id in courses_id:
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course = redis_connection.hgetall(course_id)
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if not course:
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continue
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course['id'] = course_id.split(":")[1]
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courses.append(course)
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return render(request, 'search.html', {'person': person, 'courses': courses})
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return render(request, 'search.html', {'person': person, "error_message": "The form has been wrongly filled!"})
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def notifications_view(request):
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person = request.session.get("person", "")
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messages = request.session.get("messages", [])
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return render(request, 'notifications.html', {'person': person, 'messages': messages})
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def notifications(request):
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person = request.session.get("person", "")
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messages = request.session.get("messages", [])
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if person == "":
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return render(request, 'login.html', {'person': Person(name="", role=""), "error_message": "You must login!"})
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pub_sub.punsubscribe()
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courses_id = [course['id'] for course in getCoursesFromPerson(getPersonId(person['name'], person['role']).split(":")[1])]
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if not courses_id:
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return courses(request, "You're not registered to any course. Please register to one to follow notifications.")
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pub_sub.psubscribe(*courses_id)
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for message in pub_sub.listen():
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if message["type"] != 'pmessage':
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continue
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messages.append(message)
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messages.reverse()
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request.session["message"] = messages
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break
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return notifications_view(request)
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def clear_notifications(request):
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request.session["messages"] = []
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return notifications_view(request)
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# Every id is only the number, not the course:number or person:number |