path: root/ishtar_common/models.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2010-2013 Étienne Loks  <etienne.loks_AT_peacefrogsDOTnet>

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# See the file COPYING for details.

"""
Models description
"""
from cStringIO import StringIO
import datetime
from PIL import Image
import os
import tempfile

from django.conf import settings
from django.core.exceptions import ObjectDoesNotExist, ValidationError
from django.core.files.uploadedfile import SimpleUploadedFile
from django.core.validators import validate_slug
from django.core.urlresolvers import reverse, NoReverseMatch
from django.db.utils import DatabaseError
from django.db.models import Q, Max, Count
from django.db.models.signals import post_save
from django.utils.translation import ugettext_lazy as _, ugettext
from django.utils.safestring import SafeUnicode, mark_safe
from django.template.defaultfilters import slugify

from django.contrib.auth.models import User, Group
from django.contrib.gis.db import models
from django.contrib import admin

from simple_history.models import HistoricalRecords as BaseHistoricalRecords

from ooo_replace import ooo_replace

def post_save_user(sender, **kwargs):
    user = kwargs['instance']
    ishtaruser = None
    q = IshtarUser.objects.filter(username=user.username)
    if not q.count():
        ishtaruser = IshtarUser.create_from_user(user)
    else:
        ishtaruser = q.all()[0]
    if ishtaruser.is_superuser \
       and not ishtaruser.has_right('administrator'):
        ishtaruser.person.person_types.add(PersonType.objects.get(
                                                   txt_idx='administrator'))
post_save.connect(post_save_user, sender=User)

class ValueGetter(object):
    _prefix = ""
    def get_values(self, prefix=''):
        if not prefix:
            prefix = self._prefix
        values = {}
        for field_name in self._meta.get_all_field_names():
            if not hasattr(self, field_name):
                continue
            value = getattr(self, field_name)
            if hasattr(value, 'get_values'):
                values.update(value.get_values(prefix + field_name + '_'))
            else:
                values[prefix + field_name] = value
        return values

    @classmethod
    def get_empty_values(cls, prefix=''):
        if not prefix:
            prefix = self._prefix
        values = {}
        for field_name in cls._meta.get_all_field_names():
            values[prefix + field_name] = ''
        return values

class HistoricalRecords(BaseHistoricalRecords):
    def create_historical_record(self, instance, type):
        history_modifier = getattr(instance, 'history_modifier', None)
        manager = getattr(instance, self.manager_name)
        attrs = {}
        for field in instance._meta.fields:
            attrs[field.attname] = getattr(instance, field.attname)
        q_history = instance.history.filter(
                                   history_modifier_id=history_modifier.pk
                                   ).order_by('-history_date', '-history_id')
        if not q_history.count():
            manager.create(history_type=type, **attrs)
            return
        old_instance = q_history.all()[0]
        # multiple saving by the same user in a very short time are generaly
        # caused by post_save signals it is not relevant to keep them
        min_history_date = datetime.datetime.now() \
                           - datetime.timedelta(seconds=5)
        q = q_history.filter(history_date__isnull=False,
                             history_date__gt=min_history_date
                     ).order_by('-history_date', '-history_id')
        if q.count():
            return

        # record a new version only if data have been changed
        for field in instance._meta.fields:
            if getattr(old_instance, field.attname) != attrs[field.attname]:
                manager.create(history_type=type, **attrs)
                return

# valid ID validator for models
def valid_id(cls):
    def func(value):
        try:
            cls.objects.get(pk=value)
        except ObjectDoesNotExist:
            raise ValidationError(_(u"Not a valid item."))
    return func

def valid_ids(cls):
    def func(value):
        if "," in value:
            value = value.split(",")
        for v in value:
            try:
                cls.objects.get(pk=v)
            except ObjectDoesNotExist:
                raise ValidationError(
                                   _(u"An item selected is not a valid item."))
    return func

# unique validator for models
def is_unique(cls, field):
    def func(value):
        query = {field:value}
        try:
            assert cls.objects.filter(**query).count() == 0
        except AssertionError:
            raise ValidationError(_(u"This item already exist."))
    return func

class OwnPerms:
    """
    Manage special permissions for object's owner
    """
    @classmethod
    def get_query_owns(cls, user):
        """
        Query object to get own items
        """
        return None # implement for each object

    def is_own(self, user):
        """
        Check if the current object is owned by the user
        """
        query = self.get_query_owns(user)
        if not query:
            return False
        query = query & Q(pk=self.pk)
        return cls.objects.filter(query).count()

    @classmethod
    def has_item_of(cls, user):
        """
        Check if the user own some items
        """
        query = cls.get_query_owns(user)
        if not query:
            return False
        return cls.objects.filter(query).count()

    @classmethod
    def get_owns(cls, user):
        """
        Get Own items
        """
        if isinstance(user, User):
            user = IshtarUser.objects.get(user_ptr=user)
        if user.is_anonymous():
            return []
        query = cls.get_query_owns(user)
        if not query:
            return []
        return cls.objects.filter(query).order_by(*cls._meta.ordering).all()

class GeneralType(models.Model):
    """
    Abstract class for "types"
    """
    label = models.CharField(_(u"Label"), max_length=100)
    txt_idx = models.CharField(_(u"Textual ID"),
                         validators=[validate_slug], max_length=30, unique=True)
    comment = models.TextField(_(u"Comment"), blank=True, null=True)
    available = models.BooleanField(_(u"Available"))
    HELP_TEXT = u""

    class Meta:
        abstract = True
        unique_together = (('txt_idx', 'available'),)

    def __unicode__(self):
        return self.label

    @property
    def short_label(self):
        return self.label

    @classmethod
    def get_help(cls, dct={}, exclude=[]):
        help_text = cls.HELP_TEXT
        c_rank = -1
        help_items = u"\n"
        for item in cls.get_types(dct=dct, instances=True, exclude=exclude):
            if hasattr(item, '__iter__'):
                # TODO: manage multiple levels
                continue
            if not item.comment:
                continue
            if c_rank > item.rank:
                help_items += u"</dl>\n"
            elif c_rank < item.rank:
                help_items += u"<dl>\n"
            c_rank = item.rank
            help_items += u"<dt>%s</dt><dd>%s</dd>" % (item.label,
                                u"<br/>".join(item.comment.split('\n')))
        c_rank += 1
        if c_rank:
            help_items += c_rank*u"</dl>"
        if help_text or help_items != u'\n':
            return mark_safe(help_text + help_items)
        return u""

    @classmethod
    def get_types(cls, dct={}, instances=False, exclude=[], empty_first=True):
        base_dct = dct.copy()
        if hasattr(cls, 'parent'):
            return cls._get_parent_types(base_dct, instances, exclude=exclude,
                                         empty_first=empty_first)
        return cls._get_types(base_dct, instances, exclude=exclude,
                              empty_first=empty_first)

    @classmethod
    def _get_types(cls, dct={}, instances=False, exclude=[], empty_first=True):
        dct['available'] = True
        if not instances and empty_first:
            yield ('', '--')
        items = cls.objects.filter(**dct)
        if exclude:
            items = items.exclude(txt_idx__in=exclude)
        for item in items.order_by(*cls._meta.ordering).all():
            if instances:
                item.rank = 0
                yield item
            else:
                yield (item.pk, _(unicode(item)))

    PREFIX = "&rsaquo; "

    @classmethod
    def _get_childs(cls, item, dct, prefix=0, instances=False, exclude=[]):
        prefix += 1
        dct['parent'] = item
        childs = cls.objects.filter(**dct)
        if exclude:
            childs = childs.exclude(txt_idx__in=exclude)
        if hasattr(cls, 'order'):
            childs = childs.order_by('order')
        for child in childs.all():
            if instances:
                child.rank = prefix
                yield child
            else:
                yield (child.pk, SafeUnicode(prefix*cls.PREFIX + \
                                         unicode(_(unicode(child))) ))
            for sub_child in cls._get_childs(child, dct, prefix, instances,
                                             exclude=exclude):
                yield sub_child

    @classmethod
    def _get_parent_types(cls, dct={}, instances=False, exclude=[],
                          empty_first=True):
        dct['available'] = True
        if not instances and empty_first:
            yield ('', '--')
        dct['parent'] = None
        items = cls.objects.filter(**dct)
        if exclude:
            items = items.exclude(txt_idx__in=exclude)
        if hasattr(cls, 'order'):
            items = items.order_by('order')
        for item in items.all():
            if instances:
                item.rank = 0
                yield item
            else:
                yield (item.pk, unicode(item))
            for child in cls._get_childs(item, dct, instances, exclude=exclude):
                yield child

class ImageModel(models.Model):
    image = models.ImageField(upload_to="upload/", blank=True, null=True)
    thumbnail = models.ImageField(upload_to='upload/thumbs/', blank=True,
                                  null=True)
    IMAGE_MAX_SIZE = settings.IMAGE_MAX_SIZE
    THUMB_MAX_SIZE = settings.THUMB_MAX_SIZE

    class Meta:
        abstract = True

    def has_changed(self, field):
        if not self.pk:
            return True
        manager = getattr(self.__class__, 'objects')
        old = getattr(manager.get(pk=self.pk), field)
        return not getattr(self, field) == old

    def create_thumb(self, image, size):
        """Returns the image resized to fit inside a box of the given size"""
        image.thumbnail(size, Image.ANTIALIAS)
        temp = StringIO()
        image.save(temp, 'jpeg')
        temp.seek(0)
        return SimpleUploadedFile('temp', temp.read())

    def save(self, *args, **kwargs):
        # manage images
        if self.has_changed('image') and self.image:
            # convert to jpg
            filename = os.path.splitext(os.path.split(self.image.name)[-1])[0]
            old_path = self.image.path
            filename = "%s.jpg" % filename
            image = Image.open(self.image.file)

            # convert to RGB
            if image.mode not in ('L', 'RGB'):
                image = image.convert('RGB')

            # resize if necessary
            self.image.save(filename,
                            self.create_thumb(image, self.IMAGE_MAX_SIZE),
                            save=False)

            if old_path != self.image.path:
                os.remove(old_path)

            # save the thumbnail
            self.thumbnail.save('_%s' % filename,
                             self.create_thumb(image, self.THUMB_MAX_SIZE),
                             save=False)
        super(ImageModel, self).save(*args, **kwargs)

class HistoryError(Exception):
    def __init__(self, value):
        self.value = value
    def __str__(self):
        return repr(self.value)

class BaseHistorizedItem(models.Model):
    history_modifier = models.ForeignKey(User, related_name='+',
                                      verbose_name=_(u"Last editor"))
    class Meta:
        abstract = True

    def save(self, *args, **kwargs):
        assert hasattr(self, 'history_modifier') == True
        super(BaseHistorizedItem, self).save(*args, **kwargs)
        return True

    def get_previous(self, step=None, date=None, strict=True):
        """
        Get a "step" previous state of the item
        """
        assert step or date
        historized = self.history.all()
        item = None
        if step:
            assert len(historized) > step
            item = historized[step]
        else:
            for step, item in enumerate(historized):
                if item.history_date == date:
                    break
            # ended with no match
            if item.history_date != date:
                return
        item._step = step
        if len(historized) != (step + 1):
            item._previous = historized[step + 1].history_date
        else:
            item._previous = None
        if step > 0:
            item._next = historized[step - 1].history_date
        else:
            item._next = None
        item.history_date = historized[step].history_date
        model = self.__class__
        for k in model._meta.get_all_field_names():
            field = model._meta.get_field_by_name(k)[0]
            if hasattr(field, 'rel') and field.rel:
                if not hasattr(item, k+'_id'):
                    setattr(item, k, getattr(self, k))
                    continue
                val = getattr(item, k+'_id')
                if not val:
                    setattr(item, k, None)
                    continue
                try:
                    val = field.rel.to.objects.get(pk=val)
                    setattr(item, k, val)
                except ObjectDoesNotExist:
                    if strict:
                        raise HistoryError(u"The class %s has no pk %d" % (
                                           unicode(field.rel.to), val))
                    setattr(item, k, None)
        item.pk = self.pk
        return item

    @property
    def last_edition_date(self):
        try:
            return self.history.order_by('-history_date').all()[0].history_date
        except IndexError:
            return

    def rollback(self, date):
        """
        Rollback to a previous state
        """
        to_del, new_item = [], None
        for item in self.history.all():
            if item.history_date == date:
                new_item = item
                break
            to_del.append(item)
        if not new_item:
            raise HistoryError(u"The date to rollback to doesn't exist.")
        try:
            for f in self._meta.fields:
                k = f.name
                if k != 'id' and hasattr(self, k):
                    if not hasattr(new_item, k):
                        k = k + "_id"
                    setattr(self, k, getattr(new_item, k))
            try:
                self.history_modifier = User.objects.get(
                           pk=new_item.history_modifier_id)
            except User.ObjectDoesNotExist:
                pass
            self.save()
        except:
            raise HistoryError(u"The rollback has failed.")
        # clean the obsolete history
        for historized_item in to_del:
            historized_item.delete()

    def values(self):
        values = {}
        for f in self._meta.fields:
            k = f.name
            if k != 'id':
                values[k] = getattr(self, k)
        return values

    def get_show_url(self):
        try:
            return reverse('show-'+self.__class__.__name__.lower(),
                                            args=[self.pk, ''])
        except NoReverseMatch:
            return

    @property
    def associated_filename(self):
        if [True for attr in ('get_town_label', 'get_department', 'reference',
                              'short_class_name') if not hasattr(self, attr)]:
            return ''
        items = [self.get_department(), self.get_town_label(),
                 self.short_class_name, self.reference]
        last_edition_date = self.last_edition_date
        if last_edition_date:
            items.append(last_edition_date.strftime('%Y%m%d'))
        else:
            items.append('00000000')
        return slugify(u"-".join([unicode(item) for item in items]))

class LightHistorizedItem(BaseHistorizedItem):
    history_date = models.DateTimeField(default=datetime.datetime.now)
    class Meta:
        abstract = True

    def save(self, *args, **kwargs):
        super(LightHistorizedItem, self).save(*args, **kwargs)
        return True

class Wizard(models.Model):
    url_name = models.CharField(_(u"URL name"), max_length=128, unique=True)
    class Meta:
        verbose_name = _(u"Wizard")
        ordering = ['url_name']

    def __unicode__(self):
        return unicode(self.url_name)

class WizardStep(models.Model):
    order = models.IntegerField(_(u"Order"))
    wizard = models.ForeignKey(Wizard, verbose_name=_(u"Wizard"))
    url_name = models.CharField(_(u"URL name"), max_length=128)
    name = models.CharField(_(u"Label"), max_length=128)
    class Meta:
        verbose_name = _(u"Wizard step")
        ordering = ['wizard', 'order']

    def __unicode__(self):
        return u"%s » %s" % (unicode(self.wizard), unicode(self.name))

class UserDashboard:
    def __init__(self):
        types = IshtarUser.objects.values('person__person_types',
                                          'person__person_types__label')
        self.types = types.annotate(number=Count('pk'))\
                          .order_by('person__person_types')

class Dashboard:
    def __init__(self, model):
        self.model = model
        self.total_number = model.get_total_number()
        history_model = self.model.history.model
        # last edited - created
        self.recents, self.lasts = [], []
        for last_lst, modif_type in ((self.lasts, '+'), (self.recents, '~')):
            last_ids = history_model.objects.values('id')\
                                            .annotate(hd=Max('history_date'))
            last_ids = last_ids.filter(history_type=modif_type)
            from archaeological_finds.models import Find
            if self.model == Find:
                last_ids = last_ids.filter(downstream_treatment_id__isnull=True)
                if modif_type == '+':
                   last_ids = last_ids.filter(upstream_treatment_id__isnull=True)
            last_ids = last_ids.order_by('-hd').distinct().all()[:5]
            for idx in last_ids:
                try:
                    obj = self.model.objects.get(pk=idx['id'])
                except:
                    # deleted object are always referenced in history
                    continue
                obj.history_date = idx['hd']
                last_lst.append(obj)
        # years
        self.years = model.get_years()
        self.years.sort()
        if not self.total_number or not self.years:
            return
        self.values = [('year', _(u"Year"), reversed(self.years))]
        # numbers
        self.numbers = [model.get_by_year(year).count() for year in self.years]
        self.values += [('number', _(u"Number"), reversed(self.numbers))]
        # calculate
        self.average = self.get_average()
        self.variance = self.get_variance()
        self.standard_deviation = self.get_standard_deviation()
        self.median = self.get_median()
        self.mode = self.get_mode()
        # by operation
        if not hasattr(model, 'get_by_operation'):
            return
        operations = model.get_operations()
        operation_numbers = [model.get_by_operation(op).count()
                             for op in operations]
        # calculate
        self.operation_average = self.get_average(operation_numbers)
        self.operation_variance = self.get_variance(operation_numbers)
        self.operation_standard_deviation = self.get_standard_deviation(
                                                       operation_numbers)
        self.operation_median = self.get_median(operation_numbers)
        operation_mode_pk = self.get_mode(dict(zip(operations,
                                                     operation_numbers)))
        if operation_mode_pk:
            from archaeological_operations.models import Operation
            self.operation_mode = unicode(Operation.objects.get(
                                                       pk=operation_mode_pk))

    def get_average(self, vals=[]):
        if not vals:
            vals = self.numbers
        return sum(vals)/len(vals)

    def get_variance(self, vals=[]):
        if not vals:
            vals = self.numbers
        avrg = self.get_average(vals)
        return self.get_average([(x-avrg)**2 for x in vals])

    def get_standard_deviation(self, vals=[]):
        if not vals:
            vals = self.numbers
        return round(self.get_variance(vals)**0.5, 3)

    def get_median(self, vals=[]):
        if not vals:
            vals = self.numbers
        len_vals = len(vals)
        vals.sort()
        if (len_vals % 2) == 1:
            return vals[len_vals/2]
        else:
            return (vals[len_vals/2-1] + vals[len_vals/2])/2.0

    def get_mode(self, vals={}):
        if not vals:
            vals = dict(zip(self.years, self.numbers))
        mx = max(vals.values())
        for v in vals:
            if vals[v] == mx:
                return v

class DocumentTemplate(models.Model):
    CLASSNAMES = (('archaeological_operations.models.AdministrativeAct',
                  _(u"Administrative Act")),)
    name = models.CharField(_(u"Name"), max_length=100)
    template = models.FileField(_(u"Template"), upload_to="upload/templates/")
    associated_object_name = models.CharField(_(u"Associated object"),
                                             max_length=100, choices=CLASSNAMES)
    available = models.BooleanField(_(u"Available"), default=True)

    class Meta:
        verbose_name = _(u"Document template")
        verbose_name_plural = _(u"Document templates")
        ordering = ['associated_object_name']

    def __unicode__(self):
        return self.name

    @classmethod
    def get_tuples(cls, dct={}, empty_first=True):
        dct['available'] = True
        if empty_first:
            yield ('', '--')
        items = cls.objects.filter(**dct)
        for item in items.order_by(*cls._meta.ordering).all():
            yield (item.pk, _(unicode(item)))

    def publish(self, c_object):
        tempdir = tempfile.mkdtemp("-ishtardocs")
        output_name = tempdir + os.path.sep + \
            slugify(self.name.replace(' ', '_').lower()) + u'-' +\
            datetime.date.today().strftime('%Y-%m-%d') +\
            u"." + self.template.name.split('.')[-1]
        missing = ooo_replace(self.template, output_name, c_object.get_values())
        return output_name

class Department(models.Model):
    label = models.CharField(_(u"Label"), max_length=30)
    number = models.CharField(_(u"Number"), unique=True, max_length=3)

    class Meta:
        verbose_name = _(u"Department")
        verbose_name_plural = _(u"Departments")
        ordering = ['number']

    def __unicode__(self):
        return unicode(self.number) + settings.JOINT + self.label

class Address(BaseHistorizedItem):
    address = models.TextField(_(u"Address"), null=True, blank=True)
    address_complement = models.TextField(_(u"Address complement"), null=True,
                                          blank=True)
    postal_code = models.CharField(_(u"Postal code"), max_length=10, null=True,
                                   blank=True)
    town = models.CharField(_(u"Town"), max_length=30, null=True, blank=True)
    country = models.CharField(_(u"Country"), max_length=30, null=True,
                               blank=True)
    phone = models.CharField(_(u"Phone"), max_length=18, null=True, blank=True)
    mobile_phone = models.CharField(_(u"Mobile phone"), max_length=18,
                                    null=True, blank=True)
    history = HistoricalRecords()

    class Meta:
        abstract = True

class OrganizationType(GeneralType):
    class Meta:
        verbose_name = _(u"Organization type")
        verbose_name_plural = _(u"Organization types")
        ordering = ('label',)

class Organization(Address, OwnPerms, ValueGetter):
    name = models.CharField(_(u"Name"), max_length=100)
    organization_type = models.ForeignKey(OrganizationType,
                                          verbose_name=_(u"Type"))
    history = HistoricalRecords()
    class Meta:
        verbose_name = _(u"Organization")
        verbose_name_plural = _(u"Organizations")
        permissions = (
          ("view_organization", ugettext(u"Can view all Organization")),
          ("view_own_organization", ugettext(u"Can view own Organization")),
          ("add_own_organization", ugettext(u"Can add own Organization")),
          ("change_own_organization", ugettext(u"Can change own Organization")),
          ("delete_own_organization", ugettext(u"Can delete own Organization")),
        )

    def __unicode__(self):
        return self.name

class PersonType(GeneralType):
    #rights = models.ManyToManyField(WizardStep, verbose_name=_(u"Rights"))
    groups = models.ManyToManyField(Group, verbose_name=_(u"Groups"),
                                    blank=True, null=True)
    class Meta:
        verbose_name = _(u"Person type")
        verbose_name_plural = _(u"Person types")
        ordering = ('label',)

class Person(Address, OwnPerms, ValueGetter) :
    _prefix = 'person_'
    TYPE = (('Mr', _(u'Mr')),
            ('Ms', _(u'Miss')),
            ('Md', _(u'Mrs')),
            ('Dr', _(u'Doctor')),
            )
    TABLE_COLS = ('name', 'surname', 'email', 'person_types_list',
                  'attached_to')
    title = models.CharField(_(u"Title"), max_length=2, choices=TYPE)
    surname = models.CharField(_(u"Surname"), max_length=20, blank=True,
                               null=True)
    name = models.CharField(_(u"Name"), max_length=30)
    email = models.CharField(_(u"Email"), max_length=40, blank=True, null=True)
    person_types = models.ManyToManyField(PersonType, verbose_name=_(u"Types"))
    attached_to = models.ForeignKey('Organization', related_name='members',
                       verbose_name=_(u"Is attached to"), blank=True, null=True)

    class Meta:
        verbose_name = _(u"Person")
        verbose_name_plural = _(u"Persons")
        permissions = (
            ("view_person", ugettext(u"Can view all Person")),
            ("view_own_person", ugettext(u"Can view own Person")),
            ("add_own_person", ugettext(u"Can add own Person")),
            ("change_own_person", ugettext(u"Can change own Person")),
            ("delete_own_person", ugettext(u"Can delete own Person")),
        )

    def __unicode__(self):
        values = [unicode(getattr(self, attr))
                   for attr in ('surname', 'name', 'attached_to')
                               if getattr(self, attr)]
        return u" ".join(values)

    def get_values(self, prefix=''):
        values = super(Person, self).get_values(prefix=prefix)
        values[prefix+'title'] = dict(self.TYPE)[self.title]
        if not self.attached_to:
            values.update(Person.get_empty_values(prefix=prefix + 'attached_to_'))
        return values

    person_types_list_lbl = _(u"Types")
    @property
    def person_types_list(self):
        return u", ".join([unicode(pt) for pt in self.person_types.all()])

    def has_right(self, right_name):
        if '.' in right_name:
            right_name = right_name.split('.')[-1]
        if type(right_name) in (list, tuple):
            return bool(self.person_types.filter(
                                           txt_idx__in=right_name).count()) or \
                   bool(self.person_types.filter(
                     groups__permissions__codename__in=right_name).count())
        # or self.person_types.filter(wizard__url_name__in=right_name).count())
        return bool(self.person_types.filter(txt_idx=right_name).count()) or \
               bool(self.person_types.filter(
                     groups__permissions__codename=right_name).count())
        # or self.person_types.filter(wizard__url_name=right_name).count())

    def full_label(self):
        values = []
        if self.title:
            values = [unicode(_(self.title))]
        values += [unicode(getattr(self, attr))
                   for attr in ('surname', 'name', 'attached_to')
                               if getattr(self, attr)]
        return u" ".join(values)

    @property
    def associated_filename(self):
        values = [unicode(getattr(self, attr))
                   for attr in ('surname', 'name', 'attached_to')
                               if getattr(self, attr)]
        return slugify(u"-".join(values))

class IshtarUser(User):
    person = models.ForeignKey(Person, verbose_name=_(u"Person"), unique=True,
                               related_name='ishtaruser')

    class Meta:
        verbose_name = _(u"Ishtar user")
        verbose_name_plural = _(u"Ishtar users")

    @classmethod
    def create_from_user(cls, user):
        default = user.username
        surname = user.first_name or default
        name = user.last_name or default
        email = user.email
        person_type = None
        if user.is_superuser:
            person_type = PersonType.objects.get(txt_idx='administrator')
        else:
            person_type = PersonType.objects.get(txt_idx='public_access')
        person = Person.objects.create(title='Mr', surname=surname,
                                       name=name, email=email,
                                       history_modifier=user)
        person.person_types.add(person_type)
        return IshtarUser.objects.create(user_ptr=user, username=default,
                                         person=person)

    def has_right(self, right_name):
       return self.person.has_right(right_name)

class AuthorType(GeneralType):
    class Meta:
        verbose_name = _(u"Author type")
        verbose_name_plural = _(u"Author types")

class Author(models.Model):
    person = models.ForeignKey(Person, verbose_name=_(u"Person"),
                               related_name='author')
    author_type = models.ForeignKey(AuthorType, verbose_name=_(u"Author type"))

    class Meta:
        verbose_name = _(u"Author")
        verbose_name_plural = _(u"Authors")

    def __unicode__(self):
        return unicode(self.person) + settings.JOINT + unicode(self.author_type)

    def related_sources(self):
        return list(self.treatmentsource_related.all()) + \
               list(self.operationsource_related.all()) + \
               list(self.findsource_related.all()) + \
               list(self.contextrecordsource_related.all())

class SourceType(GeneralType):
    class Meta:
        verbose_name = _(u"Source type")
        verbose_name_plural = _(u"Source types")

class Source(models.Model):
    title = models.CharField(_(u"Title"), max_length=300)
    source_type = models.ForeignKey(SourceType, verbose_name=_(u"Type"))
    authors = models.ManyToManyField(Author, verbose_name=_(u"Authors"),
                                 related_name="%(class)s_related")
    associated_url = models.URLField(verify_exists=False, blank=True, null=True,
                           verbose_name=_(u"Numerical ressource (web address)"))
    receipt_date = models.DateField(blank=True, null=True,
                                    verbose_name=_(u"Receipt date"))
    creation_date = models.DateField(blank=True, null=True,
                                    verbose_name=_(u"Creation date"))
    reference = models.CharField(_(u"Ref."), max_length=25, null=True,
                                 blank=True)
    internal_reference = models.CharField(_(u"Internal reference"),
                                          max_length=25, null=True, blank=True)
    TABLE_COLS = ['title', 'source_type', 'authors',]

    class Meta:
        abstract = True

    def __unicode__(self):
        return self.title

if settings.COUNTRY == 'fr':
    class Arrondissement(models.Model):
        name = models.CharField(u"Nom", max_length=30)
        department = models.ForeignKey(Department, verbose_name=u"Département")

        def __unicode__(self):
            return settings.JOINT.join((self.name, unicode(self.department)))

    class Canton(models.Model):
        name = models.CharField(u"Nom", max_length=30)
        arrondissement = models.ForeignKey(Arrondissement,
                                           verbose_name=u"Arrondissement")
        def __unicode__(self):
            return settings.JOINT.join((self.name, unicode(self.arrondissement)))

class Town(models.Model):
    name = models.CharField(_(u"Name"), max_length=100)
    surface = models.IntegerField(_(u"Surface (m²)"), blank=True, null=True)
    center = models.PointField(_(u"Localisation"), srid=settings.SRID,
                               blank=True, null=True)
    if settings.COUNTRY == 'fr':
        numero_insee = models.CharField(u"Numéro INSEE", max_length=6,
                                        unique=True)
        departement = models.ForeignKey(Department, verbose_name=u"Département",
                                       null=True, blank=True)
        canton = models.ForeignKey(Canton, verbose_name=u"Canton", null=True,
                                   blank=True)
    objects = models.GeoManager()

    class Meta:
        verbose_name = _(u"Town")
        verbose_name_plural = _(u"Towns")
        if settings.COUNTRY == 'fr':
            ordering = ['numero_insee']

    def __unicode__(self):
        if settings.COUNTRY == "fr":
            return u"%s (%s)" % (self.name, self.numero_insee[:2])
        return self.name