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from django.db import models
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from django.contrib.auth.models import User
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from django.db.models.signals import post_save
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# Machine Model
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class Machine(models.Model):
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  type = models.CharField(max_length=20)
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  id = models.CharField(max_length=10, primary_key=True)
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  maint = models.BooleanField(default=False)
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  dstart = models.DateTimeField(blank=True, null=True)
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  dend = models.DateTimeField(blank=True, null=True)
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  def __unicode__(self):
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    return u'%s %s' % (self.type, self.id)
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# User Model
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class RoboUser(models.Model):
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  # Field is required when using profiles 
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  user = models.OneToOneField(User)
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  # Roboclub RFID Card number
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  rfid = models.CharField(max_length=10, blank=True, default=0)
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  # Roboclub Shop Access Permissions
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  machines = models.ManyToManyField(Machine, blank=True, null=True)
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  # Cell Phone
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  cell = models.DecimalField(max_digits=10, decimal_places=0, blank=True, null=True)
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  # Class Level
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  UNDERGRAD = 'UG'
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  GRADUATE = 'GR'
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  AFFILIATE = 'AF'
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  OTHER = 'OH'
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  CLASS_LEVEL_CHOICES = (
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        (UNDERGRAD, 'Undergraduate'),
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        (GRADUATE, 'Graduate Student'),
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        (AFFILIATE, 'Non-Student CMU Affiliate'),
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        (OTHER, 'Other User'),
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  )
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  class_level = models.CharField(max_length=2, 
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                                 choices=CLASS_LEVEL_CHOICES,
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                                 default=UNDERGRAD)
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  # Graduation Year
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  #grad_year = models.DecimalField(max_digits=4, decimal_places=0)
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  grad_year = models.IntegerField(blank=True, null=True)
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  # Primary and Secondary Major/Minors
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  major = models.CharField(max_length=20)
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  sec_major_one = models.CharField(max_length=20, blank=True, null=True)
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  sec_major_two = models.CharField(max_length=20, blank=True, null=True)
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  #Club Rank
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  JUNIOR_MEM = 'JM'
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  SENIOR_MEM = 'SM'
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  OFFICER = 'OM'
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  CLUB_RANK_CHOICES = (
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      (JUNIOR_MEM, 'Junior Member'),
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      (SENIOR_MEM, 'Senior Member'),
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      (OFFICER, 'Officer'),
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  )
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  club_rank = models.CharField(max_length=2, 
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                               choices=CLUB_RANK_CHOICES,
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                               default=JUNIOR_MEM)
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  # Roboclub Transaction Info
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  dues_paid = models.DateField(blank=True, null=True)
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  tshirt_rec = models.BooleanField(default=False)
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  # Shop and E-Bench Status
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  GOOD = 'GD'
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  FIRST_WARN = 'FS'
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  SECOND_WARN = 'SD'
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  SEM_BAN = 'SB'
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  CLUB_BAN = 'CB'
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  STATUS_CHOICES = (
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      (GOOD, 'Good Standing'),
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      (FIRST_WARN, 'First Warning Recieved'),
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      (SECOND_WARN, 'Second Warning Recieved'),
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      (SEM_BAN, 'Semester Ban'),
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      (CLUB_BAN, 'Club Ban')
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  )
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  bench_status = models.CharField(max_length=2,
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                                  choices=STATUS_CHOICES,
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                                  default=GOOD)
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  shop_status = models.CharField(max_length=2,
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                                  choices=STATUS_CHOICES,
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                                  default=GOOD)
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  def __unicode__(self):
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    return self.user.username;
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# needed for Django Auth model
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def create_roboclub_user(sender, instance, created, **kwargs):
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  if created:
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      RoboUser.objects.create(user=instance)
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post_save.connect(create_roboclub_user, sender=User)
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# Event Model
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class Event(models.Model):
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  type = models.CharField(max_length=30)
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  tstart = models.DateTimeField()
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  tend = models.DateTimeField()
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  user = models.ForeignKey('RoboUser')
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  succ = models.BooleanField(default=False)
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  imgurl = models.URLField()
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  machine = models.ForeignKey('Machine')
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  project = models.ForeignKey('Project')
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  matuse = models.TextField()
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  def __unicode__(self):
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    return u'%s %s %s' (self.type, self.user.username, self.succ)
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# Project Model
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class Project(models.Model):
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  name = models.CharField(max_length=30)
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  primuser = models.ForeignKey('RoboUser', related_name='pri+')
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  users = models.ManyToManyField('RoboUser', related_name='u+')
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  charge = models.BooleanField(default=False)
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  def __unicode__(self):
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    return self.name
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# Roboclub Resources Model
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class RoboResource(models.Model):
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  type = models.CharField(max_length=30)
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  id = models.CharField(max_length=20, primary_key=True)
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  checked_out = models.BooleanField(default=False)
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  user = models.ForeignKey('RoboUser', related_name='u+', blank=True)
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  time_out = models.DateTimeField(blank=True,null=True)
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  time_due = models.DateTimeField(blank=True,null=True)
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  officer = models.ForeignKey('RoboUser', related_name='o+', blank=True)
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  def __unicode__(self):
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    return u'%s %s %s' (self.type, self.id, self.checked_out)
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