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