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content/views.py
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247
content/views.py
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from django.db.models import Sum
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from django.shortcuts import get_object_or_404
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from drf_spectacular.types import OpenApiTypes
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from drf_spectacular.utils import OpenApiParameter, extend_schema
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from rest_framework import status
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from rest_framework.permissions import IsAuthenticated
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from rest_framework.response import Response
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from rest_framework.views import APIView
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from progress.models import UserHearts, UserStats
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from .models import Choice, Grade, Lesson, Question, UserAnswer, UserLessonCompletion
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from .serializers import (
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AnswerRequestSerializer,
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AnswerResponseSerializer,
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GradesListResponseSerializer,
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HomeResponseSerializer,
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LessonCompleteRequestSerializer,
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LessonCompleteResponseSerializer,
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LessonIntroResponseSerializer,
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LessonQuestionsResponseSerializer,
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)
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class GradesListView(APIView):
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"""GET /api/grades — لیست پایه‌ها"""
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@extend_schema(responses=GradesListResponseSerializer, tags=['Curriculum (content)'])
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def get(self, request):
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grades = Grade.objects.all().order_by('id')
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data = {'grades': [
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{'id': g.id, 'title': g.title, 'icon': g.icon, 'color': g.color} for g in grades
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]}
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return Response(GradesListResponseSerializer(data).data)
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def _node_status(node, user_id, is_first_unlocked_candidate):
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lesson_ids = list(node.lessons.values_list('id', flat=True))
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if not lesson_ids:
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return 'locked'
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completed_count = UserLessonCompletion.objects.filter(
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user_id=user_id, lesson_id__in=lesson_ids
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).values('lesson_id').distinct().count()
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if completed_count >= len(lesson_ids):
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return 'completed'
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if completed_count > 0 or is_first_unlocked_candidate:
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return 'unlocked'
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return 'locked'
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class HomeView(APIView):
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"""GET /api/home?userId&grade — نقشه‌ی مهارت‌ها + آمار (ادغام‌شده)"""
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@extend_schema(
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parameters=[
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OpenApiParameter('userId', OpenApiTypes.INT, required=True),
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OpenApiParameter('grade', OpenApiTypes.INT, required=False),
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],
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responses=HomeResponseSerializer,
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tags=['Curriculum (content)'],
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)
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def get(self, request):
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user_id = request.query_params.get('userId')
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grade_id = request.query_params.get('grade')
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if not user_id:
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return Response({'detail': 'پارامتر userId الزامی است.'}, status=status.HTTP_400_BAD_REQUEST)
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user_id = int(user_id)
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units_qs = Grade.objects.get(pk=grade_id).units.all() if grade_id else []
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units_payload = []
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for unit in units_qs:
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nodes = list(unit.nodes.all())
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node_payload = []
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unlock_next = True # اولین نودِ قفل‌نشده در هر واحد، باز می‌مونه
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for node in nodes:
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node_status = _node_status(node, user_id, unlock_next)
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if node_status != 'completed':
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unlock_next = False
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node_payload.append({'id': str(node.id), 'title': node.title, 'status': node_status})
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units_payload.append({'id': str(unit.id), 'title': unit.title, 'nodes': node_payload})
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stats = UserStats.objects.filter(user_id=user_id).first()
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stats_payload = {
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'progressPercent': stats.progress_percent if stats else 0,
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'xp': stats.xp if stats else 0,
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'coins': stats.coins if stats else 0,
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}
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data = {'units': units_payload, 'stats': stats_payload}
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return Response(HomeResponseSerializer(data).data)
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class LessonIntroView(APIView):
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"""GET /api/lessons/{id}/intro"""
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@extend_schema(responses=LessonIntroResponseSerializer, tags=['Curriculum (content)'])
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def get(self, request, lesson_id):
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lesson = get_object_or_404(Lesson, pk=lesson_id)
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data = {
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'lessonId': str(lesson.id),
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'title': lesson.title,
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'introText': lesson.intro_text,
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'mascotAnimation': lesson.mascot_animation,
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}
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return Response(LessonIntroResponseSerializer(data).data)
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class LessonQuestionsView(APIView):
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"""GET /api/lessons/{id}/questions"""
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@extend_schema(responses=LessonQuestionsResponseSerializer, tags=['Curriculum (content)'])
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def get(self, request, lesson_id):
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lesson = get_object_or_404(Lesson, pk=lesson_id)
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questions = lesson.questions.prefetch_related('choices').all()
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data = {'questions': [
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{
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'id': str(q.id),
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'type': q.type,
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'prompt': q.prompt,
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'options': [{'id': str(c.id), 'value': c.value} for c in q.choices.all()],
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}
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for q in questions
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]}
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return Response(LessonQuestionsResponseSerializer(data).data)
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class QuestionAnswerView(APIView):
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"""POST /api/questions/{id}/answer — ثبت پاسخ"""
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# ⚠️ اصلاح امنیتی: قبلاً userId از query/body کلاینت خونده می‌شد که به
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# کلاینت اجازه می‌داد به‌جای هر کاربر دیگری پاسخ ثبت کنه (heart/xp کاربر
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# دلخواه رو تغییر بده). حالا auth اجباریه و همیشه از request.user.id
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# (که از توکن معتبر استخراج شده) استفاده می‌شه.
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permission_classes = [IsAuthenticated]
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@extend_schema(
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request=AnswerRequestSerializer,
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responses=AnswerResponseSerializer,
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tags=['Curriculum (content)'],
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)
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def post(self, request, question_id):
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question = get_object_or_404(Question, pk=question_id)
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serializer = AnswerRequestSerializer(data=request.data)
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serializer.is_valid(raise_exception=True)
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selected_option_id = serializer.validated_data['selectedOptionId']
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choice = get_object_or_404(Choice, pk=selected_option_id, question=question)
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correct_choice = question.choices.filter(is_correct=True).first()
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user_id = request.user.id
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xp_earned = 10 if choice.is_correct else 0
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UserAnswer.objects.create(
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user_id=user_id,
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question=question,
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choice=choice,
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correct=choice.is_correct,
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xp_earned=xp_earned,
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)
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if not choice.is_correct:
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hearts, _ = UserHearts.objects.get_or_create(user_id=user_id)
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if hearts.current_hearts > 0:
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hearts.current_hearts -= 1
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hearts.save(update_fields=['current_hearts'])
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hearts_remaining = hearts.current_hearts
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else:
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hearts = UserHearts.objects.filter(user_id=user_id).first()
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hearts_remaining = hearts.current_hearts if hearts else 5
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data = {
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'correct': choice.is_correct,
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'correctOptionId': str(correct_choice.id) if correct_choice else '',
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'xpEarned': xp_earned,
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'heartsRemaining': hearts_remaining if hearts_remaining is not None else 5,
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}
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return Response(AnswerResponseSerializer(data).data)
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class LessonCompleteView(APIView):
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"""POST /api/lessons/{id}/complete — اتمام درس + آمار جدید"""
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# ⚠️ اصلاح امنیتی: قبلاً userId از query/body کلاینت خونده می‌شد که به
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# کلاینت اجازه می‌داد به‌جای هر کاربر دیگری xp/coins ثبت کنه. حالا auth
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# اجباریه و همیشه از request.user.id استفاده می‌شه.
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permission_classes = [IsAuthenticated]
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@extend_schema(
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request=LessonCompleteRequestSerializer,
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responses=LessonCompleteResponseSerializer,
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tags=['Curriculum (content)'],
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)
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def post(self, request, lesson_id):
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lesson = get_object_or_404(Lesson, pk=lesson_id)
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serializer = LessonCompleteRequestSerializer(data=request.data)
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serializer.is_valid(raise_exception=True)
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correct_count = serializer.validated_data['correctCount']
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total_questions = serializer.validated_data['totalQuestions'] or 1
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ratio = correct_count / total_questions
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stars = 3 if ratio >= 0.9 else 2 if ratio >= 0.6 else 1 if ratio > 0 else 0
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potential_xp = correct_count * 10
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potential_coins = stars * 5
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user_id = request.user.id
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# ⚠️ اصلاح: تکمیل هر درس یک‌بارمصرفه — دفعات بعدیِ تکمیل همون درس
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# نباید دوباره xp/coins به آمار کاربر اضافه کنه (قبلاً هر بار
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# تکمیل، xp_earned/coins_earned رو بدون قید به stats اضافه می‌کرد).
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is_first_completion = not UserLessonCompletion.objects.filter(
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user_id=user_id, lesson=lesson
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).exists()
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xp_earned = potential_xp if is_first_completion else 0
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coins_earned = potential_coins if is_first_completion else 0
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UserLessonCompletion.objects.create(
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user_id=user_id,
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lesson=lesson,
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correct_count=correct_count,
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stars=stars,
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xp_earned=xp_earned,
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coins_earned=coins_earned,
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)
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stats, _ = UserStats.objects.get_or_create(user_id=user_id)
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stats.xp += xp_earned
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stats.coins += coins_earned
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total_lessons = Lesson.objects.count() or 1
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completed_lessons = UserLessonCompletion.objects.filter(
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user_id=user_id
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).values('lesson_id').distinct().count()
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stats.progress_percent = round(min(completed_lessons / total_lessons, 1.0) * 100, 2)
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stats.save(update_fields=['xp', 'coins', 'progress_percent'])
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stats_payload = {
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'progressPercent': stats.progress_percent,
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'xp': stats.xp,
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'coins': stats.coins,
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}
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data = {
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'stars': stars,
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'xpEarned': xp_earned,
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'coinsEarned': coins_earned,
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'stats': stats_payload,
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}
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return Response(LessonCompleteResponseSerializer(data).data)
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