Fonction "list" de la vue des cours rennommée en "list_courses" pour éviter des erreurs de nommage. Ajout de boutons de navigation (suivant et précédent) pour les vidéos.

courses/views.py

@@ -5,7 +5,7 @@ from django.db.models import Prefetch
 from .models import Course, Lesson, Module, Comment
 from .forms import CommentForm
 
-def list(request):
+def list_courses(request):
     courses = Course.objects.all()
     return render(request, 'courses/list.html', {'courses': courses})
 
@@ -82,6 +82,20 @@ def lesson_detail(request, course_slug, module_slug, lesson_slug):
         .order_by('order')
     )
 
+    # Compute previous and next lessons within the ordered course lessons
+    prev_lesson = None
+    next_lesson = None
+    try:
+        ids = list(lessons.values_list('id', flat=True))
+        idx = ids.index(lesson.id)
+        if idx > 0:
+            prev_lesson = next(l for l in lessons if l.id == ids[idx - 1])
+        if idx < len(ids) - 1:
+            next_lesson = next(l for l in lessons if l.id == ids[idx + 1])
+    except ValueError:
+        # current lesson not in list — keep prev/next as None
+        pass
+
     # Public comments for the current lesson (top-level) and their replies
     replies_qs = Comment.objects.filter(is_active=True).select_related('user').order_by('created_at')
     comments = (
@@ -98,5 +112,7 @@ def lesson_detail(request, course_slug, module_slug, lesson_slug):
         'lessons': lessons,
         'comments': comments,
         'comment_form': form,
+        'prev_lesson': prev_lesson,
+        'next_lesson': next_lesson,
     }
     return render(request, 'courses/lesson.html', context)