Jan Dittberner
0e32aff544
- add get_disk_space, get_used_mailboxes, get_mailboxes and get_database methods for hostingpackages.models.CustomerHostingPackage
331 lines
9.8 KiB
Python
331 lines
9.8 KiB
Python
"""
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This module contains the hosting package models.
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"""
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from __future__ import absolute_import, unicode_literals
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from django.conf import settings
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from django.db import models
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from django.utils.encoding import python_2_unicode_compatible
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from django.utils.translation import ugettext_lazy as _, ungettext
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from model_utils import Choices
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from model_utils.models import TimeStampedModel
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from managemails.models import Mailbox
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from osusers.models import User as OsUser
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from userdbs.models import DB_TYPES
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DISK_SPACE_UNITS = Choices(
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(0, 'M', _('MiB')),
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(1, 'G', _('GiB')),
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(2, 'T', _('TiB')),
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)
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DISK_SPACE_FACTORS = (
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(1, None, None),
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(1024, 1, None),
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(1024 * 1024, 1024, 1),
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)
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@python_2_unicode_compatible
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class HostingPackageBase(TimeStampedModel):
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description = models.TextField(_('description'), blank=True)
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mailboxcount = models.PositiveIntegerField(_('mailbox count'))
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diskspace = models.PositiveIntegerField(
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_('disk space'), help_text=_('disk space for the hosting package'))
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diskspace_unit = models.PositiveSmallIntegerField(
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_('unit of disk space'), choices=DISK_SPACE_UNITS)
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class Meta:
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abstract = True
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def __str__(self):
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return self.name
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class HostingPackageTemplate(HostingPackageBase):
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name = models.CharField(_('name'), max_length=128, unique=True)
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class Meta:
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verbose_name = _('Hosting package')
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verbose_name_plural = _('Hosting packages')
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class HostingOption(TimeStampedModel):
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"""
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This is the base class for several types of hosting options.
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"""
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@python_2_unicode_compatible
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class DiskSpaceOptionBase(models.Model):
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diskspace = models.PositiveIntegerField(_('disk space'))
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diskspace_unit = models.PositiveSmallIntegerField(
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_('unit of disk space'), choices=DISK_SPACE_UNITS)
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class Meta:
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abstract = True
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ordering = ['diskspace_unit', 'diskspace']
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unique_together = ['diskspace', 'diskspace_unit']
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verbose_name = _('Disk space option')
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verbose_name_plural = _('Disk space options')
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def __str__(self):
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return _("Additional disk space {space} {unit}").format(
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space=self.diskspace, unit=self.get_diskspace_unit_display())
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class DiskSpaceOption(DiskSpaceOptionBase, HostingOption):
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"""
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This is a class for hosting options adding additional disk space to
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existing hosting packages.
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"""
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@python_2_unicode_compatible
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class UserDatabaseOptionBase(models.Model):
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number = models.PositiveIntegerField(
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_('number of databases'), default=1)
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db_type = models.PositiveSmallIntegerField(
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_('database type'), choices=DB_TYPES)
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class Meta:
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abstract = True
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ordering = ['db_type', 'number']
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unique_together = ['number', 'db_type']
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verbose_name = _('Database option')
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verbose_name_plural = _('Database options')
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def __str__(self):
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return ungettext(
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'{type} database',
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'{count} {type} databases',
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self.number
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).format(
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type=self.get_db_type_display(), count=self.number
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)
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class UserDatabaseOption(UserDatabaseOptionBase, HostingOption):
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"""
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This is a class for hosting options adding user databases to existing
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hosting packages.
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"""
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@python_2_unicode_compatible
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class MailboxOptionBase(models.Model):
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"""
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Base class for mailbox options.
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"""
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number = models.PositiveIntegerField(
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_('number of mailboxes'), unique=True)
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class Meta:
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abstract = True
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ordering = ['number']
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verbose_name = _('Mailbox option')
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verbose_name_plural = _('Mailbox options')
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def __str__(self):
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return ungettext(
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'{count} additional mailbox',
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'{count} additional mailboxes',
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self.number
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).format(
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count=self.number
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)
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class MailboxOption(MailboxOptionBase, HostingOption):
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"""
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This is a class for hosting options adding more mailboxes to existing
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hosting packages.
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"""
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class CustomerHostingPackageManager(models.Manager):
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"""
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This is the default manager implementation for
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:py:class:`CustomerHostingPackage`.
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"""
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def create_from_template(self, customer, template, name, **kwargs):
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"""
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Use this method to create a new :py:class:`CustomerHostingPackage` from
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a :py:class:`HostingPackageTemplate`.
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The method copies data from the template to the new
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:py:class:`CustomerHostingPackage` instance.
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:param customer: a Django user representing a customer
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:param template: a :py:class:`HostingPackageTemplate`
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:param str name: the name of the hosting package there must only be
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one hosting package of this name for each customer
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:return: customer hosting package
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:rtype: :py:class:`CustomerHostingPackage`
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"""
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package = CustomerHostingPackage(
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customer=customer, template=template, name=name)
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for attrname in ('description', 'diskspace', 'diskspace_unit',
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'mailboxcount'):
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setattr(package, attrname, getattr(template, attrname))
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if 'commit' in kwargs and kwargs['commit'] is True:
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package.save(**kwargs)
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return package
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class CustomerHostingPackage(HostingPackageBase):
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"""
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This class defines customer specific hosting packages.
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"""
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customer = models.ForeignKey(
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settings.AUTH_USER_MODEL, verbose_name=_('customer'))
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template = models.ForeignKey(
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HostingPackageTemplate, verbose_name=_('hosting package template'),
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help_text=_(
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'The hosting package template that this hosting package is based'
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' on'
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))
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name = models.CharField(_('name'), max_length=128)
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osuser = models.OneToOneField(
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OsUser, verbose_name=_('Operating system user'),
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blank=True, null=True)
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objects = CustomerHostingPackageManager()
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class Meta:
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unique_together = ['customer', 'name']
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verbose_name = _('customer hosting package')
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verbose_name_plural = _('customer hosting packages')
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def get_disk_space(self):
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"""
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Get the total disk space reserved for this hosting package and all its
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additional disk space options.
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:return: disk space
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:rtype: int
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"""
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diskspace = self.diskspace
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min_unit = self.diskspace_unit
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options = CustomerDiskSpaceOption.objects.filter(hosting_package=self)
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for option in options:
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if option.diskspace_unit == min_unit:
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diskspace += option.disk_space
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elif option.diskspace_unit > min_unit:
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diskspace += (
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DISK_SPACE_FACTORS[option.diskspace_unit][min_unit] *
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option.diskspace)
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else:
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diskspace = (
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DISK_SPACE_FACTORS[min_unit][option.diskspace_unit] *
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diskspace) + option.diskspace
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min_unit = option.diskspace_unit
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return DISK_SPACE_FACTORS[min_unit][0] * diskspace * 1024**2
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def get_used_mailboxes(self):
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"""
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Get the number of used mailboxes for this hosting package.
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"""
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if self.osuser:
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return Mailbox.objects.filter(osuser=self.osuser).count()
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return 0
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def get_mailboxes(self):
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"""
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Get the number of mailboxes provided by this hosting package and all
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of its mailbox options.
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"""
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result = CustomerMailboxOption.objects.filter(
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hosting_package=self
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).aggregate(
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mailbox_sum=models.Sum('number')
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)
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return self.mailboxcount + result['mailbox_sum']
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def get_databases(self):
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"""
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Get the number of user databases provided by user database hosting
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options for this hosting package.
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"""
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return CustomerUserDatabaseOption.objects.values(
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'db_type'
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).filter(hosting_package=self).annotate(
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number=models.Sum('number')
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).all()
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class CustomerHostingPackageOption(TimeStampedModel):
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"""
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This class defines options for customer hosting packages.
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"""
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hosting_package = models.ForeignKey(
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CustomerHostingPackage, verbose_name=_('hosting package'))
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class Meta:
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verbose_name = _('customer hosting option')
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verbose_name_plural = _('customer hosting options')
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class CustomerDiskSpaceOption(DiskSpaceOptionBase,
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CustomerHostingPackageOption):
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"""
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This is a class for customer hosting package options adding additional disk
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space to existing customer hosting package.
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"""
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template = models.ForeignKey(
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DiskSpaceOption,
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verbose_name=_('disk space option template'),
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help_text=_(
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'The disk space option template that this disk space option is'
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' based on'
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))
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class CustomerUserDatabaseOption(UserDatabaseOptionBase,
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CustomerHostingPackageOption):
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"""
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This is a class for customer hosting package options adding user databases
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to existing customer hosting packages.
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"""
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template = models.ForeignKey(
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UserDatabaseOption,
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verbose_name=_('user database option template'),
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help_text=_(
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'The user database option template that this database option is'
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' based on'
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))
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class CustomerMailboxOption(MailboxOptionBase,
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CustomerHostingPackageOption):
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"""
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This is a class for customer hosting package options adding additional
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mailboxes to existing customer hosting packages.
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"""
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template = models.ForeignKey(
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MailboxOption,
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verbose_name=_('mailbox option template'),
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help_text=_(
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'The mailbox option template that this mailbox option is based on'
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))
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