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import os
from django.db import models
from django.utils.translation import gettext_lazy as _
from filer.fields.image import FilerImageField
from filer.fields.file import FilerFileField
from apps.account.models import StudentUser
def lesson_file_upload_to(instance, filename):
return os.path.join(f"courses/{instance.course.slug}/lessons/{filename}")
class Lesson(models.Model):
class ContentTypeChoices(models.TextChoices):
LINK = 'link', 'Link'
FILE = 'file', 'File'
course = models.ForeignKey("course.Course", on_delete=models.CASCADE, related_name='lessons', verbose_name='Course')
title = models.CharField(max_length=255, verbose_name='Lesson Title')
priority = models.IntegerField(null=True, blank=True, verbose_name='Priority')
is_active = models.BooleanField(default=True, verbose_name=_('Is Active'))
duration = models.PositiveIntegerField(verbose_name='Duration (in minutes)')
content_type = models.CharField(max_length=10, choices=ContentTypeChoices.choices, verbose_name='Content Type')
content_file = models.FileField(
null=True,
blank=True,
upload_to=lesson_file_upload_to,
)
video_link = models.CharField(max_length=500, null=True, blank=True, verbose_name='Video Link')
created_at = models.DateTimeField(auto_now_add=True, verbose_name=_("Created at"))
updated_at = models.DateTimeField(auto_now=True, verbose_name=_("Updated At"))
def __str__(self):
return f"{self.course.title} - {self.title}"
def is_completed_by(self, student):
return self.completions.filter(student=student).exists()
class LessonCompletion(models.Model):
student = models.ForeignKey(
StudentUser,
on_delete=models.CASCADE,
related_name='lesson_completions'
)
lesson = models.ForeignKey(
Lesson,
on_delete=models.CASCADE,
related_name='completions'
)
completed_at = models.DateTimeField(auto_now_add=True)
created_at = models.DateTimeField(auto_now_add=True, verbose_name=_("Created at"))
class Meta:
unique_together = ('student', 'lesson')
def __str__(self):
return f"{self.student.fullname} - {self.lesson.title} - Completed"