media file urls enhancements

apps/course/serializers/admin.py

@@ -1,4 +1,4 @@
-from rest_framework import serializers
+from rest_framework import serializers
 from utils import FileFieldSerializer, get_thumbs
 from apps.course.models import (
     Course,
@@ -12,7 +12,8 @@ from apps.course.models import (
     Glossary,
     CourseLiveSession,
     LiveSessionUser,
-    LiveSessionRecording
+    LiveSessionRecording,
+    Participant
 )
 from apps.account.models import ProfessorUser
 from apps.course.models.course import extract_text_from_json, get_localized_field
@@ -502,7 +503,7 @@ class AdminLiveSessionListSerializer(serializers.ModelSerializer):
 
 class AdminLiveSessionDetailSerializer(serializers.ModelSerializer):
     course_title = serializers.SerializerMethodField()
-    user_sessions = AdminLiveSessionUserSerializer(many=True, read_only=True)
+    user_sessions = serializers.SerializerMethodField()
     recordings = AdminLiveSessionRecordingSerializer(many=True, read_only=True)
     recorded_file = FileFieldSerializer(required=False, allow_null=True)
 
@@ -516,3 +517,66 @@ class AdminLiveSessionDetailSerializer(serializers.ModelSerializer):
         lang = get_request_lang(self)
         return get_localized_field(lang, obj.course.title)
 
+    def get_user_sessions(self, obj):
+        # 1. Get all active participants of this course
+        participants = obj.course.participants.filter(is_active=True).select_related('student')
+        
+        # 2. Get all live session user records for this session
+        attendance_map = {
+            ls_user.user_id: ls_user 
+            for ls_user in obj.user_sessions.all().select_related('user')
+        }
+        
+        # 3. Build the combined list
+        data = []
+        for p in participants:
+            student = p.student
+            # Check if this student has an attendance record
+            attendance = attendance_map.get(student.id)
+            
+            if attendance:
+                data.append({
+                    'id': attendance.id,
+                    'session': obj.id,
+                    'user': student.id,
+                    'user_name': student.fullname or student.username,
+                    'user_email': student.email,
+                    'role': attendance.role,
+                    'entered_at': attendance.entered_at.isoformat() if attendance.entered_at else None,
+                    'exited_at': attendance.exited_at.isoformat() if attendance.exited_at else None,
+                    'is_online': attendance.is_online,
+                    'has_attended': True
+                })
+            else:
+                data.append({
+                    'id': None,
+                    'session': obj.id,
+                    'user': student.id,
+                    'user_name': student.fullname or student.username,
+                    'user_email': student.email,
+                    'role': 'participant',
+                    'entered_at': None,
+                    'exited_at': None,
+                    'is_online': False,
+                    'has_attended': False
+                })
+                
+        # Also append any attendees who are NOT in the participants list (e.g. professor/moderator/observer)
+        participant_student_ids = {p.student_id for p in participants}
+        for user_id, attendance in attendance_map.items():
+            if user_id not in participant_student_ids:
+                data.append({
+                    'id': attendance.id,
+                    'session': obj.id,
+                    'user': user_id,
+                    'user_name': attendance.user.fullname or attendance.user.username,
+                    'user_email': attendance.user.email,
+                    'role': attendance.role,
+                    'entered_at': attendance.entered_at.isoformat() if attendance.entered_at else None,
+                    'exited_at': attendance.exited_at.isoformat() if attendance.exited_at else None,
+                    'is_online': attendance.is_online,
+                    'has_attended': True
+                })
+                
+        return data
+

utils/__init__.py

@@ -317,8 +317,35 @@ class FileFieldSerializer(serializers.CharField):
     """
 
     def get_rpath(self, p):
-        # extract relative path of doc
-        return p[p.find('/static/') + 7:]
+        if not p:
+            return p
+        if not isinstance(p, str):
+            return p
+            
+        # If /media/ is in the path, extract the relative path after the last /media/
+        if "/media/" in p:
+            idx = p.rfind("/media/")
+            return p[idx + 7:].lstrip('/')
+            
+        # If /static/ is in the path, extract the relative path after the last /static/
+        if "/static/" in p:
+            idx = p.rfind("/static/")
+            return p[idx + 8:].lstrip('/')
+            
+        # If it's a URL but doesn't contain /media/ or /static/
+        if "://" in p:
+            try:
+                parsed = urlparse(p)
+                path = parsed.path
+                if path.startswith('/media/'):
+                    return path[7:].lstrip('/')
+                elif path.startswith('/static/'):
+                    return path[8:].lstrip('/')
+                return path.lstrip('/')
+            except Exception:
+                pass
+                
+        return p.lstrip('/')
 
     def to_representation(self, value):
         request = self.context.get('request', None)