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82 lines
2.8 KiB
82 lines
2.8 KiB
from rest_framework.generics import ListAPIView, RetrieveAPIView
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from drf_yasg.utils import swagger_auto_schema
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from drf_yasg import openapi
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from django.shortcuts import get_object_or_404
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from rest_framework import status
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from rest_framework.response import Response
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from apps.course.serializers import (
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LessonSerializer
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)
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from apps.course.models import Course, Lesson
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from apps.course.doc import *
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from utils.exceptions import AppAPIException
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class LessonListView(ListAPIView):
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serializer_class = LessonSerializer
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queryset = Lesson.objects.filter(is_active=True)
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@swagger_auto_schema(
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operation_description=doc_courses_lesson(),
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)
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def get(self, request, *args, **kwargs):
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return super().get(request, *args, **kwargs)
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def get_queryset(self):
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course_slug = self.kwargs.get('slug')
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course = get_object_or_404(Course, )
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course = Course.objects.filter(slug=course_slug).first()
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if not course:
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raise AppAPIException({"message": "course not found"}, status_code=status.HTTP_404_NOT_FOUND)
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return self.queryset.filter(course=course).order_by('priority','id')
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class LessonDetailView(RetrieveAPIView):
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serializer_class = LessonSerializer
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def get(self, request, *args, **kwargs):
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lesson_id = self.kwargs.get('id')
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lesson = get_object_or_404(Lesson, id=lesson_id, is_active=True)
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# Get the next and previous lessons based on priority and id
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next_lesson = Lesson.objects.filter(
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course=lesson.course,
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is_active=True,
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priority__gte=lesson.priority,
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id__gt=lesson.id
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).order_by('priority', 'id').first()
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previous_lesson = Lesson.objects.filter(
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course=lesson.course,
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is_active=True,
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priority__lte=lesson.priority,
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id__lt=lesson.id
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).order_by('-priority', '-id').first()
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total_lessons = Lesson.objects.filter(course=lesson.course, is_active=True).count()
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# Calculate the current lesson number in the course
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current_lesson_number = Lesson.objects.filter(
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course=lesson.course,
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is_active=True,
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priority__lte=lesson.priority
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).count()
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# Serialize the current lesson
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lesson_data = self.get_serializer(lesson).data
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# Add current lesson number and total lessons
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lesson_data['current_lesson_number'] = current_lesson_number
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lesson_data['total_lessons'] = total_lessons
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# Add next and previous lesson ids
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lesson_data['next_lesson_id'] = next_lesson.id if next_lesson else None
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lesson_data['previous_lesson_id'] = previous_lesson.id if previous_lesson else None
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lesson_data['can_go_next'] = next_lesson is not None
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return Response(lesson_data)
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