wtem/models.py

   1 # -*- coding: utf-8 -*-
   2 import random
   3 import string
   4 import os
   5 import json
   6
   7 from django.core.validators import validate_email
   8 from django.db import models
   9 from django.contrib.auth.models import User
  10 from django.core.exceptions import ValidationError
  11 from django.core.mail import send_mail
  12 from django.core.urlresolvers import reverse
  13 from django.template.loader import render_to_string
  14 from django.utils.translation import ugettext as _
  15 from jsonfield import JSONField
  16
  17 from contact.models import Contact
  18
  19 f = file(os.path.dirname(__file__) + '/fixtures/exercises.json')
  20 exercises = json.loads(f.read())
  21 f.close()
  22
  23 DEBUG_KEY = 'smerfetka159'
  24
  25
  26 def make_key(length):
  27     return ''.join(
  28         random.choice(string.ascii_uppercase + string.ascii_lowercase + string.digits)
  29         for i in range(length))
  30
  31
  32 class Submission(models.Model):
  33     contact = models.ForeignKey(Contact, null=True)
  34     key = models.CharField(max_length=30, unique=True)
  35     first_name = models.CharField(max_length=100)
  36     last_name = models.CharField(max_length=100)
  37     email = models.EmailField(max_length=100, unique=True)
  38     answers = models.CharField(max_length=65536, null=True, blank=True)
  39     key_sent = models.BooleanField(default=False)
  40     marks = JSONField(default={})
  41     examiners = models.ManyToManyField(User, null=True, blank=True)
  42     end_time = models.CharField(max_length=5, null=True, blank=True)
  43
  44     def __unicode__(self):
  45         return ', '.join((self.last_name, self.first_name, self.email))
  46
  47     @classmethod
  48     def generate_key(cls):
  49         key = ''
  50         while not key or key in [record['key'] for record in cls.objects.values('key')]:
  51             key = make_key(30)
  52         return key
  53
  54     @classmethod
  55     def create(cls, first_name, last_name, email, key=None, contact=None):
  56         submission = cls(
  57             contact=contact,
  58             key=key if key else Submission.generate_key(),
  59             first_name=first_name,
  60             last_name=last_name,
  61             email=email
  62         )
  63
  64         submission.save()
  65         return submission
  66
  67     def get_mark(self, user_id, exercise_id):
  68         mark = None
  69         user_id = str(user_id)
  70         exercise_id = str(exercise_id)
  71         if self.marks and user_id in self.marks:
  72             mark = self.marks[user_id].get(exercise_id, None)
  73         return mark
  74
  75     def set_mark(self, user_id, exercise_id, mark):
  76         user_id = str(user_id)
  77         exercise_id = str(exercise_id)
  78         if not self.marks:
  79             self.marks = dict()
  80
  81         self.marks.setdefault(user_id, {})[exercise_id] = mark
  82         if mark == 'None':
  83             del self.marks[user_id][exercise_id]
  84
  85     def get_exercise_marks_by_examiner(self, exercise_id):
  86         marks = dict()
  87         for examiner_id, examiner_marks in self.marks.items():
  88             mark = examiner_marks.get(exercise_id, None)
  89             if mark is not None:
  90                 marks[examiner_id] = mark
  91         return marks
  92
  93     def get_final_exercise_mark(self, exercise_id):
  94         # exercise = exercises[int(exercise_id)-1]
  95         exercise = [e for e in exercises if str(e['id']) == str(exercise_id)][0]
  96         if exercise_checked_manually(exercise):
  97             marks_by_examiner = self.get_exercise_marks_by_examiner(exercise_id)
  98             if len(marks_by_examiner):
  99                 return sum(map(float, marks_by_examiner.values())) / float(len(marks_by_examiner))
 100             else:
 101                 return None
 102         else:
 103             if not self.answers:
 104                 return None
 105             answer = json.loads(self.answers)[exercise_id]['closed_part']
 106             t = exercise['type']
 107             if t == 'edumed_uporzadkuj':
 108                 return exercise['points'] if map(int, answer) == exercise['answer'] else 0
 109             if t == 'edumed_przyporzadkuj':
 110                 toret = 0
 111                 for bucket_id, items in answer.items():
 112                     for item_id in items:
 113                         is_corect = False
 114                         if exercise.get('answer_mode', None) == 'possible_buckets_for_item':
 115                             is_correct = int(bucket_id) in exercise['answer'].get(item_id)
 116                         else:
 117                             is_correct = int(item_id) in exercise['answer'].get(bucket_id, [])
 118                         if is_correct:
 119                             toret += exercise['points_per_hit']
 120                 return toret
 121             if t == 'edumed_wybor':
 122                 if len(exercise['answer']) == 1:
 123                     if len(answer) and int(answer[0]) == exercise['answer'][0]:
 124                         return exercise['points']
 125                     else:
 126                         return 0
 127                 else:
 128                     toret = 0
 129                     if exercise.get('answer_mode', None) == 'all_or_nothing':
 130                         toret = exercise['points'] if map(int, answer) == exercise['answer'] else 0
 131                     else:
 132                         for answer_id in map(int, answer):
 133                             if answer_id in exercise['answer']:
 134                                 toret += exercise['points_per_hit']
 135                     return toret
 136             if t == 'edumed_prawdafalsz':
 137                 toret = 0
 138                 for idx, statement in enumerate(exercise['statements']):
 139                     if statement[1] == 'ignore':
 140                         continue
 141                     if answer[idx] == 'true':
 142                         given = True
 143                     elif answer[idx] == 'false':
 144                         given = False
 145                     else:
 146                         given = None
 147                     if given == statement[1]:
 148                         toret += exercise['points_per_hit']
 149                 return toret
 150             raise NotImplementedError
 151
 152     @property
 153     def final_result(self):
 154         final = 0
 155         # for exercise_id in map(str,range(1, len(exercises) + 1)):
 156         for exercise_id in [str(x['id']) for x in exercises]:
 157             mark = self.get_final_exercise_mark(exercise_id)
 158             if mark is not None:
 159                 final += mark
 160         return final
 161
 162     @property
 163     def final_result_as_string(self):
 164         return ('%.2f' % self.final_result).rstrip('0').rstrip('.')
 165
 166
 167 class Attachment(models.Model):
 168     submission = models.ForeignKey(Submission)
 169     exercise_id = models.IntegerField()
 170     tag = models.CharField(max_length=128, null=True, blank=True)
 171     file = models.FileField(upload_to='wtem/attachment')
 172
 173
 174 class Assignment(models.Model):
 175     user = models.ForeignKey(User, unique=True)
 176     exercises = JSONField()
 177
 178     def clean(self):
 179         if not isinstance(self.exercises, list):
 180             raise ValidationError(_('Assigned exercises must be declared in a list format'))
 181         # for exercise in self.exercises:
 182         #     if not isinstance(exercise, int) or exercise < 1:
 183         #         raise ValidationError(_('Invalid exercise id: %s' % exercise))
 184
 185     def __unicode__(self):
 186         return self.user.username + ': ' + ','.join(map(str, self.exercises))
 187
 188
 189 class Confirmation(models.Model):
 190     first_name = models.CharField(max_length=100)
 191     last_name = models.CharField(max_length=100)
 192     email = models.EmailField(max_length=100, unique=True)
 193     contact = models.ForeignKey(Contact, null=True)
 194     key = models.CharField(max_length=30)
 195     confirmed = models.BooleanField(default=False)
 196
 197     class Meta:
 198         ordering = ['email']
 199
 200     @classmethod
 201     def create(cls, first_name, last_name, email, contact=None, key=None):
 202         confirmation = cls(
 203             contact=contact,
 204             key=key if key else make_key(30),
 205             first_name=first_name,
 206             last_name=last_name,
 207             email=email
 208         )
 209
 210         confirmation.save()
 211         return confirmation
 212
 213     def absolute_url(self):
 214         return reverse('student_confirmation', args=(self.id, self.key))
 215
 216     def readable_contact(self):
 217         return '%s <%s>' % (self.contact.body.get('przewodniczacy'), self.contact.contact)
 218
 219     def send_mail(self):
 220         mail_subject = render_to_string('contact/olimpiada/student_mail_subject.html').strip()
 221         mail_body = render_to_string(
 222             'contact/olimpiada/student_mail_body.html', {'confirmation': self})
 223         try:
 224             validate_email(self.email)
 225         except ValidationError:
 226             pass
 227         else:
 228             send_mail(mail_subject, mail_body, 'olimpiada@nowoczesnapolska.org.pl', [self.email],
 229                       fail_silently=True)
 230
 231
 232 def exercise_checked_manually(exercise):
 233     return (exercise['type'] in ('open', 'file_upload')) or 'open_part' in exercise