104 lines
3.3 KiB
Python
104 lines
3.3 KiB
Python
# bijoe - BI dashboard
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# Copyright (C) 2015 Entr'ouvert
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import datetime
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import json
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from django.db import models
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from django.http import Http404
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from django.utils.six import python_2_unicode_compatible
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from django.utils.text import slugify
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from django.utils.translation import ugettext_lazy as _
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from jsonfield import JSONField
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from bijoe.utils import get_warehouses
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from .utils import Visualization as VisuUtils
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class JSONEncoder(json.JSONEncoder):
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def default(self, obj):
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if isinstance(obj, datetime.datetime):
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return obj.isoformat()
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if isinstance(obj, datetime.date):
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return obj.isoformat()
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# Let the base class default method raise the TypeError
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return json.JSONEncoder.default(self, obj)
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@python_2_unicode_compatible
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class Visualization(models.Model):
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slug = models.SlugField(verbose_name=_('Identifier'), unique=True)
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name = models.TextField(verbose_name=_('name'))
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parameters = JSONField(verbose_name=_('parameters'), encoder_class=JSONEncoder)
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class Meta:
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ordering = ('name', 'id')
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verbose_name = _('visualization')
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verbose_name_plural = _('visualizations')
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def __str__(self):
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return self.name
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def natural_key(self):
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return (self.slug,)
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def export_json(self):
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visualization = {'slug': self.slug, 'name': self.name, 'parameters': self.parameters}
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return visualization
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@classmethod
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def import_json(cls, data):
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defaults = {'name': data['name'], 'parameters': data['parameters']}
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_, created = cls.objects.update_or_create(slug=data['slug'], defaults=defaults)
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return created
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def save(self, *args, **kwargs):
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if not self.slug:
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slug = base_slug = slugify(self.name)[:40].strip('-')
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i = 1
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while True:
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try:
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Visualization.objects.get(slug=slug)
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except Visualization.DoesNotExist:
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break
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i += 1
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slug = '%s-%s' % (base_slug, i)
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self.slug = slug
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return super().save(*args, **kwargs)
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@property
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def exists(self):
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try:
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VisuUtils.get_cube(self.parameters, self.warehouses)
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return True
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except Http404:
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return False
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@property
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def warehouses(self):
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if not hasattr(self, '_warehouses'):
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self._warehouses = get_warehouses()
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return self._warehouses
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@classmethod
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def all_visualizations(cls):
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visualizations = cls.objects.all()
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warehouses = get_warehouses()
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for visu in visualizations:
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visu._warehouses = warehouses
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return visualizations
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