curriculum/models.py

   1 # -*- coding: utf-8
   2 import re
   3 from django.core.urlresolvers import reverse
   4 from django.db import models
   5 from django.utils.translation import ugettext_lazy as _, get_language
   6 from fnpdjango.utils.models.translation import add_translatable
   7
   8 class Section(models.Model):
   9     slug = models.SlugField(_('slug'))
  10     order = models.IntegerField(_('order'))
  11
  12     class Meta:
  13         ordering = ['order']
  14         verbose_name = _('section')
  15         verbose_name_plural = _('sections')
  16
  17     def __unicode__(self):
  18         return self.name
  19
  20     def get_absolute_url(self):
  21         return "%s?s=%d" % (reverse("curriculum"), self.pk)
  22
  23     def url_for_level(self, level):
  24         return "%s?s=%d&level=%s&d=1" % (reverse("curriculum"), self.pk, level.slug)
  25
  26 add_translatable(Section, {
  27     'name': models.CharField(_('name'), max_length=255, default = '')
  28 })
  29
  30
  31 class Competence(models.Model):
  32     section = models.ForeignKey(Section)
  33     slug = models.SlugField(_('slug'))
  34     order = models.IntegerField(_('order'))
  35
  36     class Meta:
  37         ordering = ['section', 'order']
  38         verbose_name = _('competence')
  39         verbose_name_plural = _('competences')
  40
  41     def __unicode__(self):
  42         return self.name
  43
  44     def get_absolute_url(self):
  45         return "%s?c=%d" % (reverse("curriculum"), self.pk)
  46
  47     def for_level(self, level):
  48         return self.competencelevel_set.get(level=level)
  49
  50     def url_for_level(self, level):
  51         return self.for_level(level).get_absolute_url()
  52
  53     @classmethod
  54     def from_text(cls, text):
  55         """Tries to return a Competence or a Section."""
  56         parts = re.split(ur'[-\u2013]', text, 1)
  57         lookup_field_name = 'name_%s__iexact' % get_language()
  58         if len(parts) == 1:
  59             return Section.objects.get(**{lookup_field_name: text.strip()})
  60         else:
  61             return cls.objects.get(**{lookup_field_name: parts[1].strip()})
  62
  63 add_translatable(Competence, {
  64     'name': models.CharField(_('name'), max_length=255, default = '')
  65 })
  66
  67
  68 class Level(models.Model):
  69     slug = models.CharField(_('slug'), max_length=255, unique=True)
  70     meta_name = models.CharField(_('meta name'), max_length=255, unique=True)
  71     order = models.IntegerField(_('order'))
  72     package = models.FileField(upload_to=lambda i, f: "curriculum/pack/edukacjamedialna_%s.zip" % i.slug,
  73         null=True, blank=True, max_length=255)
  74     student_package = models.FileField(upload_to=lambda i, f: "curriculum/pack/edukacjamedialna_%s_uczen.zip" % i.slug,
  75         null=True, blank=True, max_length=255)
  76
  77     class Meta:
  78         ordering = ['order']
  79         verbose_name = _('educational level')
  80         verbose_name_plural = _('educational levels')
  81
  82     def __unicode__(self):
  83         return self.name
  84
  85     def length_course(self):
  86         return self.lesson_set.filter(type='course').count()
  87
  88     def length_synthetic(self):
  89         return self.lesson_set.filter(type='synthetic').count()
  90
  91     def build_package(self, student):
  92         from StringIO import StringIO
  93         import zipfile
  94         from django.core.files.base import ContentFile
  95         from catalogue.templatetags.catalogue_tags import level_box
  96         from catalogue.models import Lesson
  97
  98         buff = StringIO()
  99         zipf = zipfile.ZipFile(buff, 'w', zipfile.ZIP_STORED)
 100
 101         lessons = level_box(self)['lessons']
 102         for i, lesson in enumerate(lessons['synthetic']):
 103             prefix = 'Skrocony kurs/%d %s/' % (i, lesson.slug)
 104             lesson.add_to_zip(zipf, student, prefix)
 105         for c, (section, clessons) in enumerate(lessons['course'].items()):
 106             for i, lesson in enumerate(clessons):
 107                 prefix = 'Pelny kurs/%d %s/%d %s/' % (c, section.slug, i, lesson.slug)
 108                 lesson.add_to_zip(zipf, student, prefix)
 109         for i, lesson in enumerate(lessons['project']):
 110             prefix = 'Projekty/%d %s/' % (i, lesson.slug)
 111             lesson.add_to_zip(zipf, student, prefix)
 112         # Add all appendix lessons, from all levels.
 113         for lesson in Lesson.objects.exclude(type__in=('synthetic', 'course', 'project')):
 114             prefix = '%s/' % lesson.slug
 115             lesson.add_to_zip(zipf, student, prefix)
 116         zipf.close()
 117
 118         fieldname = "student_package" if student else "package"
 119         getattr(self, fieldname).save(None, ContentFile(buff.getvalue()))
 120
 121     def build_packages(self):
 122         self.build_package(False)
 123         self.build_package(True)
 124
 125
 126
 127 add_translatable(Level, {
 128     'name': models.CharField(_('name'), max_length=255, default = ''),
 129     'group': models.CharField(_('group'), max_length=255, default = '')
 130 })
 131
 132
 133 class CompetenceLevel(models.Model):
 134     competence = models.ForeignKey(Competence)
 135     level = models.ForeignKey(Level)
 136
 137     class Meta:
 138         ordering = ['competence', 'level']
 139         verbose_name = _('competence on level')
 140         verbose_name_plural = _('competences on levels')
 141
 142     def __unicode__(self):
 143         return u"%s/%s" % (self.competence, self.level)
 144
 145     def get_absolute_url(self):
 146         return "%s?c=%d&level=%s&d=1" % (reverse("curriculum"), self.competence.pk, self.level.slug)
 147
 148 add_translatable(CompetenceLevel, {
 149     'description': models.TextField(_('description'), default = '')
 150 })
 151
 152
 153 class CurriculumLevel(models.Model):
 154     title = models.CharField(max_length=16, db_index=True)
 155
 156     class Meta:
 157         verbose_name = _("curriculum level")
 158         verbose_name_plural = _("curriculum levels")
 159
 160     def __unicode__(self):
 161         return self.title
 162
 163
 164 class CurriculumCourse(models.Model):
 165     title = models.CharField(max_length=255)
 166     accusative = models.CharField(max_length=255)
 167     slug = models.CharField(max_length=255, db_index=True)
 168
 169     class Meta:
 170         verbose_name = _("curriculum course")
 171         verbose_name_plural = _("curriculum courses")
 172         ordering = ['slug']
 173
 174     def __unicode__(self):
 175         return self.title
 176
 177
 178 class Curriculum(models.Model):
 179     """Official curriculum."""
 180     TYPES = {'c': u'Cele kształcenia', 't': u'Treści nauczania'}
 181
 182     identifier = models.CharField(max_length=255, db_index=True)
 183     title = models.CharField(max_length=255)
 184     course = models.ForeignKey(CurriculumCourse)
 185     level = models.ForeignKey(CurriculumLevel)
 186     type = models.CharField(max_length=16, choices=TYPES.items())
 187
 188     class Meta:
 189         verbose_name = _("curriculum item")
 190         verbose_name_plural = _("curriculum items")
 191
 192     def __unicode__(self):
 193         return self.identifier
 194
 195     @classmethod
 196     def from_text(cls, identifier, title):
 197         m = re.match(r"^\d+/(?P<level>[^/]+)/(?P<course>[^/]+)/"
 198                      "(?P<type>(?:%s))[^/]+(?P<roz>/roz)?" %
 199                         "|".join(cls.TYPES), identifier)
 200         assert m is not None, "Curriculum identifier doesn't match template."
 201         level, created = CurriculumLevel.objects.get_or_create(
 202                                        title=m.group('level'))
 203         def_title = m.group('course').title()
 204         course, created = CurriculumCourse.objects.get_or_create(
 205                                         slug=m.group('course').lower(),
 206                                         defaults={
 207                                             'title': def_title,
 208                                             'accusative': def_title,
 209                                         })
 210         type_ = m.group('type')
 211         if m.group('roz'):
 212             title += " (zakres rozszerzony)"
 213
 214         try:
 215             curr = cls.objects.get(identifier=identifier)
 216         except cls.DoesNotExist:
 217             curr = cls(identifier=identifier)
 218         curr.title = title
 219         curr.course = course
 220         curr.level = level
 221         curr.type = type_
 222         curr.save()
 223         return curr
 224