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import random, datetime, os
from datetime import datetime, timedelta
from django.db import models
from django.utils import timezone
from django.contrib.auth.models import ContentType
from django.contrib.auth.models import User, Group, Permission
from sbhs_server import settings
# from django.conf import settings
MOD_GROUP_NAME = 'moderator'
def create_group(group_name, app_label):
try:
group = Group.objects.get(name=group_name)
except Group.DoesNotExist:
group = Group(name=group_name)
group.save()
# Get the models for the given app
content_types = ContentType.objects.filter(app_label=app_label)
permission_list = Permission.objects.filter(
content_type__in=content_types
)
group.permissions.add(*permission_list)
group.save()
return group
class Board(models.Model):
""" SBHS Board attributes"""
mid = models.IntegerField(unique=True)
online = models.BooleanField(default=False)
usb_id = models.IntegerField(default="0")
raspi_path = models.URLField(max_length=200, default="localhost:8000")
def save_board_details(self, raspi_ip, device):
board = Board.objects.filter(mid=device["sbhs_mac_id"])
if board.exists():
board = board.first()
else:
board = self
board.mid = device["sbhs_mac_id"]
board.raspi_path = raspi_ip
board.usb_id = int(device["usb_id"])
board.online = True
board.save()
def switch_off_inactive_boards(self, online_mids):
all_boards = Board.objects.all()
for board in all_boards:
if board.mid not in online_mids:
board.online = False
elif board.mid in online_mids:
board.online = True
board.save()
class Meta:
ordering = ['mid',]
def __str__(self):
return 'MID: {0} Online: {1}: User Count: {2}'.format(
self.mid,
self.online,
self.userboard_set.all().count()
)
class Profile(models.Model):
"""
Profile model to store user details.
"""
user = models.OneToOneField(User)
roll_number = models.CharField(max_length=20)
institute = models.CharField(max_length=128)
department = models.CharField(max_length=64)
position = models.CharField(max_length=64)
is_moderator = models.BooleanField(default=False)
is_email_verified = models.BooleanField(default=False)
activation_key = models.CharField(max_length=255,blank=True,null=True)
key_expiry_time = models.DateTimeField(blank=True,null=True)
def _toggle_moderator_group(self, group_name):
group = Group.objects.get(name=group_name)
if self.is_moderator:
self.user.groups.add(group)
else:
self.user.groups.remove(group)
def save(self, *args, **kwargs):
if self.pk is not None:
old_profile = Profile.objects.get(pk=self.pk)
if old_profile.is_moderator != self.is_moderator:
self._toggle_moderator_group(group_name=MOD_GROUP_NAME)
super(Profile, self).save(*args, **kwargs)
def __str__(self):
return '%s' % (self.user)
class SlotManager(models.Manager):
def get_user_slots(self, user):
now = timezone.now()
slots = self.filter(user=user, start_time__lte=now, end_time__gt=now)
return slots
def get_all_active_slots(self):
now = timezone.now()
slots = self.filter(start_time__lte=now, end_time__gt=now)
return slots
def check_booked_slots(self, start_time, users):
return self.filter(start_time__lte=start_time,
end_time__gt = start_time,
user__in=users
).count() == 0
def get_active_slot_for_board(self, mid):
now = timezone.now()
users = [userboard.user.id for userboard in
UserBoard.objects.filter(board__mid=mid)
]
slots = self.filter(user__in=users, start_time__lte=now,
end_time__gt=now)
return slots
def board_all_booked_slots(self,mid):
now = timezone.now()
users = [userboard.user.id for userboard in UserBoard.objects.filter(
board__mid=mid)
]
slots = self.filter(user__in=users,start_time__gte=now)
return slots
class Slot(models.Model):
user = models.ForeignKey(User)
start_time = models.DateTimeField("Start time of a slot",
default=timezone.now())
end_time = models.DateTimeField("End time of a slot",
default=timezone.now()+timedelta(
minutes=settings.SLOT_DURATION))
objects = SlotManager()
def __str__(self):
return '{} {}'.format(self.start_time, self.end_time)
class Experiment(models.Model):
slot = models.ForeignKey("Slot")
log = models.CharField(max_length=255)
checksum = models.CharField(max_length=255, null=True, blank=True)
def __str__(self):
return '{0}: {1}'.format(self.slot.user, self.slot)
class UserBoard(models.Model):
user = models.ForeignKey(User)
board = models.ForeignKey(Board)
def get_all_users_for_board(self):
now = timezone.now()
users = UserBoard.objects.filter(board=self.board)
return users
def __str__(self):
return '{0}: {1}'.format(self.user.username, self.board.mid)
class Webcam():
def __init__(self):
pass
def load_image(className,mid):
command = "timeout 2s streamer -q -f jpeg -c /dev/video" + '0'+str(mid)
command += " -o " + settings.WEBCAM_DIR + "image" + '0'+str(mid) + ".jpeg"
os.system(command)
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