forms.py 39.4 KB
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# Copyright 2014 Budapest University of Technology and Economics (BME IK)
#
# This file is part of CIRCLE Cloud.
#
# CIRCLE is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# CIRCLE 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 General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along
# with CIRCLE.  If not, see <http://www.gnu.org/licenses/>.

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from __future__ import absolute_import

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from datetime import timedelta
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from django.contrib.auth.forms import (
    AuthenticationForm, PasswordResetForm, SetPasswordForm,
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    PasswordChangeForm,
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)
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from django.contrib.auth.models import User, Group
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from django.core.validators import URLValidator
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from django.core.exceptions import PermissionDenied, ValidationError
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import autocomplete_light
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from crispy_forms.helper import FormHelper
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from crispy_forms.layout import (
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    Layout, Div, BaseInput, Field, HTML, Submit, TEMPLATE_PACK,
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)
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from crispy_forms.utils import render_field
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from django import forms
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from django.contrib.auth.forms import UserCreationForm as OrgUserCreationForm
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from django.forms.widgets import TextInput, HiddenInput
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from django.template import Context
from django.template.loader import render_to_string
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from django.utils.translation import ugettext_lazy as _
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from sizefield.widgets import FileSizeWidget
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from django.core.urlresolvers import reverse_lazy
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from django_sshkey.models import UserKey
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from firewall.models import Vlan, Host
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from vm.models import (
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    InstanceTemplate, Lease, InterfaceTemplate, Node, Trait, Instance
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)
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from django.contrib.admin.widgets import FilteredSelectMultiple
from django.contrib.auth.models import Permission
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from .models import Profile, GroupProfile
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from circle.settings.base import LANGUAGES, MAX_NODE_RAM
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from django.utils.translation import string_concat

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from .virtvalidator import domain_validator
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LANGUAGES_WITH_CODE = ((l[0], string_concat(l[1], " (", l[0], ")"))
                       for l in LANGUAGES)
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priority_choices = (
    (10, _("idle")),
    (30, _("normal")),
    (80, _("server")),
    (100, _("realtime")),
)

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class VmSaveForm(forms.Form):
    name = forms.CharField(max_length=100, label=_('Name'),
                           help_text=_('Human readable name of template.'))

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    @property
    def helper(self):
        helper = FormHelper(self)
        helper.form_tag = False
        return helper

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class VmCustomizeForm(forms.Form):
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    name = forms.CharField(widget=forms.TextInput(attrs={
        'class': "form-control",
        'style': "max-width: 350px",
        'required': "",
    }))

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    cpu_count = forms.IntegerField(widget=forms.NumberInput(attrs={
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        'class': "form-control input-tags cpu-count-input",
        'min': 1,
        'max': 10,
        'required': "",
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    }),
        min_value=1, max_value=10,
    )
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    ram_size = forms.IntegerField(widget=forms.TextInput(attrs={
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        'class': "form-control input-tags ram-input",
        'min': 128,
        'pattern': "\d+",
        'max': MAX_NODE_RAM,
        'step': 128,
        'required': "",
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    }),
        min_value=128, max_value=MAX_NODE_RAM,
    )
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    cpu_priority = forms.ChoiceField(
        priority_choices, widget=forms.Select(attrs={
            'class': "form-control input-tags cpu-priority-input",
        })
    )

    amount = forms.IntegerField(widget=forms.NumberInput(attrs={
        'class': "form-control",
        'min': "1",
        'style': "max-width: 60px",
        'required': "",
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    }), initial=1, min_value=1)
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    disks = forms.ModelMultipleChoiceField(
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        queryset=None, required=False,
        widget=forms.SelectMultiple(attrs={
            'class': "form-control",
            'id': "vm-create-disk-add-form",
        })
    )
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    networks = forms.ModelMultipleChoiceField(
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        queryset=None, required=False,
        widget=forms.SelectMultiple(attrs={
            'class': "form-control",
            'id': "vm-create-network-add-vlan",
        })
    )
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    template = forms.CharField(widget=forms.HiddenInput())
    customized = forms.CharField(widget=forms.HiddenInput())
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    def __init__(self, *args, **kwargs):
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        self.user = kwargs.pop("user", None)
        self.template = kwargs.pop("template", None)
        super(VmCustomizeForm, self).__init__(*args, **kwargs)

        # set displayed disk and network list
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        self.fields['disks'].queryset = self.template.disks.all()
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        self.fields['networks'].queryset = Vlan.get_objects_with_level(
            'user', self.user)

        # set initial for disk and network list
        self.initial['disks'] = self.template.disks.all()
        self.initial['networks'] = InterfaceTemplate.objects.filter(
            template=self.template).values_list("vlan", flat=True)

        # set initial for resources
        self.initial['cpu_priority'] = self.template.priority
        self.initial['cpu_count'] = self.template.num_cores
        self.initial['ram_size'] = self.template.ram_size

        # initial name and template pk
        self.initial['name'] = self.template.name
        self.initial['template'] = self.template.pk
        self.initial['customized'] = self.template.pk

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class GroupCreateForm(forms.ModelForm):

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    description = forms.CharField(label=_("Description"), required=False,
                                  widget=forms.Textarea(attrs={'rows': 3}))

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    def __init__(self, *args, **kwargs):
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        new_groups = kwargs.pop('new_groups', None)
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        super(GroupCreateForm, self).__init__(*args, **kwargs)
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        choices = [('', '--')]
        if new_groups:
            choices += [(g, g) for g in new_groups if len(g) <= 64]
        self.fields['org_id'] = forms.ChoiceField(
            # TRANSLATORS: directory like in LDAP
            choices=choices, required=False, label=_('Directory identifier'))
        if not new_groups:
            self.fields['org_id'].widget = HiddenInput()
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    def save(self, commit=True):
        if not commit:
            raise AttributeError('Committing is mandatory.')
        group = super(GroupCreateForm, self).save()
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        profile = group.profile
        # multiple blanks were not be unique unlike NULLs are
        profile.org_id = self.cleaned_data['org_id'] or None
        profile.description = self.cleaned_data['description']
        profile.save()
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        return group

    @property
    def helper(self):
        helper = FormHelper(self)
        helper.add_input(Submit("submit", _("Create")))
        helper.form_tag = False
        return helper
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    class Meta:
        model = Group
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        fields = ('name', )
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class GroupProfileUpdateForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        new_groups = kwargs.pop('new_groups', None)
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        superuser = kwargs.pop('superuser', False)
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        super(GroupProfileUpdateForm, self).__init__(*args, **kwargs)
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        if not superuser:
            choices = [('', '--')]
            if new_groups:
                choices += [(g, g) for g in new_groups if len(g) <= 64]
            self.fields['org_id'] = forms.ChoiceField(
                choices=choices, required=False,
                label=_('Directory identifier'))
            if not new_groups:
                self.fields['org_id'].widget = HiddenInput()
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        self.fields['description'].widget = forms.Textarea(attrs={'rows': 3})

    @property
    def helper(self):
        helper = FormHelper(self)
        helper.add_input(Submit("submit", _("Save")))
        helper.form_tag = False
        return helper

    def save(self, commit=True):
        profile = super(GroupProfileUpdateForm, self).save(commit=False)
        profile.org_id = self.cleaned_data['org_id'] or None
        if commit:
            profile.save()
        return profile

    class Meta:
        model = GroupProfile
        fields = ('description', 'org_id')


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class HostForm(forms.ModelForm):

    def setowner(self, user):
        self.instance.owner = user

    def __init__(self, *args, **kwargs):
        super(HostForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper(self)
        self.helper.form_show_labels = False
        self.helper.form_tag = False
        self.helper.layout = Layout(
            Div(
                Div(  # host
                    Div(
                        AnyTag(
                            'h3',
                            HTML(_("Host")),
                        ),
                        css_class="col-sm-3",
                    ),
                    css_class="row",
                ),
                Div(  # host data
                    Div(  # hostname
                        HTML('<label for="node-hostname-box">'
                             'Name'
                             '</label>'),
                        css_class="col-sm-3",
                    ),
                    Div(  # hostname
                        'hostname',
                        css_class="col-sm-9",
                    ),
                    Div(  # mac
                        HTML('<label for="node-mac-box">'
                             'MAC'
                             '</label>'),
                        css_class="col-sm-3",
                    ),
                    Div(
                        'mac',
                        css_class="col-sm-9",
                    ),
                    Div(  # ip
                        HTML('<label for="node-ip-box">'
                             'IP'
                             '</label>'),
                        css_class="col-sm-3",
                    ),
                    Div(
                        'ipv4',
                        css_class="col-sm-9",
                    ),
                    Div(  # vlan
                        HTML('<label for="node-vlan-box">'
                             'VLAN'
                             '</label>'),
                        css_class="col-sm-3",
                    ),
                    Div(
                        'vlan',
                        css_class="col-sm-9",
                    ),
                    css_class="row",
                ),
            ),
        )

    class Meta:
        model = Host
        fields = ['hostname', 'vlan', 'mac', 'ipv4', ]


class NodeForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super(NodeForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper(self)
        self.helper.form_show_labels = False
        self.helper.layout = Layout(
            Div(
                Div(
                    Div(
                        Div(
                            AnyTag(
                                'h3',
                                HTML(_("Node")),
                            ),
                            css_class="col-sm-3",
                        ),
                        css_class="row",
                    ),
                    Div(
                        Div(  # nodename
                            HTML('<label for="node-nodename-box">'
                                 'Name'
                                 '</label>'),
                            css_class="col-sm-3",
                        ),
                        Div(
                            'name',
                            css_class="col-sm-9",
                        ),
                        css_class="row",
                    ),
                    Div(
                        Div(  # priority
                            HTML('<label for="node-nodename-box">'
                                 'Priority'
                                 '</label>'),
                            css_class="col-sm-3",
                        ),
                        Div(
                            'priority',
                            css_class="col-sm-9",
                        ),
                        css_class="row",
                    ),
                    Div(
                        Div(  # enabled
                            HTML('<label for="node-nodename-box">'
                                 'Enabled'
                                 '</label>'),
                            css_class="col-sm-3",
                        ),
                        Div(
                            'enabled',
                            css_class="col-sm-9",
                        ),
                        css_class="row",
                    ),
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                    Div(  # nested host
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                        HTML("""{% load crispy_forms_tags %}
                            {% crispy hostform %}
                            """)
                    ),
                    Div(
                        Div(
                            AnyTag(  # tip: don't try to use Button class
                                "button",
                                AnyTag(
                                    "i",
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                                    css_class="fa fa-play"
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                                ),
                                HTML("Start"),
                                css_id="node-create-submit",
                                css_class="btn btn-success",
                            ),
                            css_class="col-sm-12 text-right",
                        ),
                        css_class="row",
                    ),
                    css_class="col-sm-11",
                ),
                css_class="row",
            ),
        )

    class Meta:
        model = Node
        fields = ['name', 'priority', 'enabled', ]


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class TemplateForm(forms.ModelForm):
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    networks = forms.ModelMultipleChoiceField(
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        queryset=None, required=False, label=_("Networks"))
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    num_cores = forms.IntegerField(widget=forms.NumberInput(attrs={
        'class': "form-control input-tags cpu-count-input",
        'min': 1,
        'max': 10,
        'required': "",
    }),
        min_value=1, max_value=10,
    )

    ram_size = forms.IntegerField(widget=forms.NumberInput(attrs={
        'class': "form-control input-tags ram-input",
        'min': 128,
        'max': MAX_NODE_RAM,
        'step': 128,
        'required': "",
    }),
        min_value=128, max_value=MAX_NODE_RAM,
    )

    priority = forms.ChoiceField(priority_choices, widget=forms.Select(attrs={
        'class': "form-control input-tags cpu-priority-input",
    }))

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    def __init__(self, *args, **kwargs):
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        self.user = kwargs.pop("user", None)
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        super(TemplateForm, self).__init__(*args, **kwargs)
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        self.fields['networks'].queryset = Vlan.get_objects_with_level(
            'user', self.user)

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        data = self.data.copy()
        data['owner'] = self.user.pk
        self.data = data
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        if self.instance.pk:
            n = self.instance.interface_set.values_list("vlan", flat=True)
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            self.initial['networks'] = n
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        if self.instance.pk and not self.instance.has_level(self.user,
                                                            'owner'):
            self.allowed_fields = ()
        else:
            self.allowed_fields = (
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                'name', 'access_method', 'description', 'system', 'tags',
                'arch', 'lease')
        if (self.user.has_perm('vm.change_template_resources')
                or not self.instance.pk):
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            self.allowed_fields += tuple(set(self.fields.keys()) -
                                         set(['raw_data']))
        if self.user.is_superuser:
            self.allowed_fields += ('raw_data', )
        for name, field in self.fields.items():
            if name not in self.allowed_fields:
                field.widget.attrs['disabled'] = 'disabled'

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        if not self.instance.pk and len(self.errors) < 1:
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            self.initial['num_cores'] = 1
            self.initial['priority'] = 10
            self.initial['ram_size'] = 512
            self.initial['max_ram_size'] = 512
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        lease_queryset = (
            Lease.get_objects_with_level("operator", self.user).distinct()
            | Lease.objects.filter(pk=self.instance.lease_id).distinct())

        self.fields["lease"].queryset = lease_queryset
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        self.fields['raw_data'].validators.append(domain_validator)

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    def clean_owner(self):
        if self.instance.pk is not None:
            return User.objects.get(pk=self.instance.owner.pk)
        return self.user

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    def clean_max_ram_size(self):
        return self.cleaned_data.get("ram_size", 0)

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    def _clean_fields(self):
        try:
            old = InstanceTemplate.objects.get(pk=self.instance.pk)
        except InstanceTemplate.DoesNotExist:
            old = None
        for name, field in self.fields.items():
            if name in self.allowed_fields:
                value = field.widget.value_from_datadict(
                    self.data, self.files, self.add_prefix(name))
                try:
                    if isinstance(field, forms.FileField):
                        initial = self.initial.get(name, field.initial)
                        value = field.clean(value, initial)
                    else:
                        value = field.clean(value)
                    self.cleaned_data[name] = value
                    if hasattr(self, 'clean_%s' % name):
                        value = getattr(self, 'clean_%s' % name)()
                        self.cleaned_data[name] = value
                except ValidationError as e:
                    self._errors[name] = self.error_class(e.messages)
                    if name in self.cleaned_data:
                        del self.cleaned_data[name]
            elif old:
                if name == 'networks':
                    self.cleaned_data[name] = [
                        i.vlan for i in self.instance.interface_set.all()]
                else:
                    self.cleaned_data[name] = getattr(old, name)
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    def save(self, commit=True):
        data = self.cleaned_data
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        self.instance.max_ram_size = data.get('ram_size')

        instance = super(TemplateForm, self).save(commit=False)
        if commit:
            instance.save()

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        # create and/or delete InterfaceTemplates
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        networks = InterfaceTemplate.objects.filter(
            template=self.instance).values_list("vlan", flat=True)
        for m in data['networks']:
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            if not m.has_level(self.user, "user"):
                raise PermissionDenied()
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            if m.pk not in networks:
                InterfaceTemplate(vlan=m, managed=m.managed,
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                                  template=self.instance).save()
        InterfaceTemplate.objects.filter(
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            template=self.instance).exclude(
            vlan__in=data['networks']).delete()
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        return instance

    @property
    def helper(self):
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        submit_kwargs = {}
        if self.instance.pk and not self.instance.has_level(self.user,
                                                            'owner'):
            submit_kwargs['disabled'] = None

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        helper = FormHelper()
        return helper
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    class Meta:
        model = InstanceTemplate
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        exclude = ('state', 'disks', )
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        widgets = {
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            'system': forms.TextInput,
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            'max_ram_size': forms.HiddenInput,
            'parent': forms.Select(attrs={'disabled': ""}),
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        }
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class LeaseForm(forms.ModelForm):

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    def __init__(self, *args, **kwargs):
        super(LeaseForm, self).__init__(*args, **kwargs)
        self.generate_fields()

    # e2ae8b048e7198428f696375b8bdcd89e90002d1/django/utils/timesince.py#L10
    def get_intervals(self, delta_seconds):
        chunks = (
            (60 * 60 * 24 * 30, "months"),
            (60 * 60 * 24 * 7, "weeks"),
            (60 * 60 * 24, "days"),
            (60 * 60, "hours"),
        )
        for i, (seconds, name) in enumerate(chunks):
            count = delta_seconds // seconds
            if count != 0:
                break
        re = {'%s' % name: count}
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        if i + 1 < len(chunks) and i > 0:
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            seconds2, name2 = chunks[i + 1]
            count2 = (delta_seconds - (seconds * count)) // seconds2
            if count2 != 0:
                re['%s' % name2] = count2
        return re

    def generate_fields(self):
        intervals = ["hours", "days", "weeks", "months"]
        methods = ["suspend", "delete"]
        # feels redundant but these lines are so long
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        s = (self.instance.suspend_interval.total_seconds()
             if self.instance.pk else 0)
        d = (self.instance.delete_interval.total_seconds()
             if self.instance.pk else 0)
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        seconds = {
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            'suspend': s,
            'delete': d
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        }
        initial = {
            'suspend': self.get_intervals(int(seconds['suspend'])),
            'delete': self.get_intervals(int(seconds['delete']))
        }
        for m in methods:
            for idx, i in enumerate(intervals):
                self.fields["%s_%s" % (m, i)] = forms.IntegerField(
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                    min_value=0, widget=NumberInput,
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                    initial=initial[m].get(i, 0))

    def save(self, commit=True):
        data = self.cleaned_data
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        suspend_seconds = timedelta(
            hours=data['suspend_hours'],
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            days=(data['suspend_days'] + data['suspend_months'] % 12 * 30 +
                  data['suspend_months'] / 12 * 365),
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            weeks=data['suspend_weeks'],
        )
        delete_seconds = timedelta(
            hours=data['delete_hours'],
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            days=(data['delete_days'] + data['delete_months'] % 12 * 30 +
                  data['delete_months'] / 12 * 365),
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            weeks=data['delete_weeks'],
        )
        self.instance.delete_interval = delete_seconds
        self.instance.suspend_interval = suspend_seconds
        instance = super(LeaseForm, self).save(commit=False)
        if commit:
            instance.save()
        return instance

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    @property
    def helper(self):
        helper = FormHelper()
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        helper.layout = Layout(
            Field('name'),
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            Field("suspend_interval_seconds", type="hidden", value="0"),
            Field("delete_interval_seconds", type="hidden", value="0"),
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            HTML(string_concat("<label>", _("Suspend in"), "</label>")),
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            Div(
                NumberField("suspend_hours", css_class="form-control"),
                Div(
                    HTML(_("hours")),
                    css_class="input-group-addon",
                ),
                NumberField("suspend_days", css_class="form-control"),
                Div(
                    HTML(_("days")),
                    css_class="input-group-addon",
                ),
                NumberField("suspend_weeks", css_class="form-control"),
                Div(
                    HTML(_("weeks")),
                    css_class="input-group-addon",
                ),
                NumberField("suspend_months", css_class="form-control"),
                Div(
                    HTML(_("months")),
                    css_class="input-group-addon",
                ),
                css_class="input-group interval-input",
            ),
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            HTML(string_concat("<label>", _("Delete in"), "</label>")),
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            Div(
                NumberField("delete_hours", css_class="form-control"),
                Div(
                    HTML(_("hours")),
                    css_class="input-group-addon",
                ),
                NumberField("delete_days", css_class="form-control"),
                Div(
                    HTML(_("days")),
                    css_class="input-group-addon",
                ),
                NumberField("delete_weeks", css_class="form-control"),
                Div(
                    HTML(_("weeks")),
                    css_class="input-group-addon",
                ),
                NumberField("delete_months", css_class="form-control"),
                Div(
                    HTML(_("months")),
                    css_class="input-group-addon",
                ),
                css_class="input-group interval-input",
            )
        )
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        helper.add_input(Submit("submit", _("Save changes")))
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        return helper

    class Meta:
        model = Lease


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class VmRenewForm(forms.Form):

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    force = forms.BooleanField(required=False, label=_(
        "Set expiration times even if they are shorter than "
        "the current value."))
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    save = forms.BooleanField(required=False, label=_(
        "Save selected lease."))
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    def __init__(self, *args, **kwargs):
        choices = kwargs.pop('choices')
        default = kwargs.pop('default')
        super(VmRenewForm, self).__init__(*args, **kwargs)

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        self.fields.insert(0, 'lease', forms.ModelChoiceField(
            queryset=choices, initial=default, required=False,
            empty_label=None, label=_('Length')))
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        if len(choices) < 2:
            self.fields['lease'].widget = HiddenInput()
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            self.fields['save'].widget = HiddenInput()
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    @property
    def helper(self):
        helper = FormHelper(self)
        helper.form_tag = False
        return helper


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class VmStateChangeForm(forms.Form):

    interrupt = forms.BooleanField(required=False, label=_(
        "Forcibly interrupt all running activities."),
        help_text=_("Set all activities to finished state, "
                    "but don't interrupt any tasks."))
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    new_state = forms.ChoiceField(Instance.STATUS, label=_(
        "New status"))
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    def __init__(self, *args, **kwargs):
        show_interrupt = kwargs.pop('show_interrupt')
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        status = kwargs.pop('status')
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        super(VmStateChangeForm, self).__init__(*args, **kwargs)

        if not show_interrupt:
            self.fields['interrupt'].widget = HiddenInput()
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        self.fields['new_state'].initial = status
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    @property
    def helper(self):
        helper = FormHelper(self)
        helper.form_tag = False
        return helper


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class VmCreateDiskForm(forms.Form):
    name = forms.CharField(max_length=100, label=_("Name"))
    size = forms.CharField(
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        widget=FileSizeWidget, initial=(10 << 30), label=_('Size'),
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        help_text=_('Size of disk to create in bytes or with units '
                    'like MB or GB.'))
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    def clean_size(self):
        size_in_bytes = self.cleaned_data.get("size")
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        if not size_in_bytes.isdigit() and len(size_in_bytes) > 0:
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            raise forms.ValidationError(_("Invalid format, you can use "
                                          " GB or MB!"))
        return size_in_bytes

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    @property
    def helper(self):
        helper = FormHelper(self)
        helper.form_tag = False
        return helper
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class VmDownloadDiskForm(forms.Form):
    name = forms.CharField(max_length=100, label=_("Name"))
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    url = forms.CharField(label=_('URL'), validators=[URLValidator(), ])
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    @property
    def helper(self):
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        helper = FormHelper(self)
        helper.form_tag = False
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        return helper


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class VmAddInterfaceForm(forms.Form):
    def __init__(self, *args, **kwargs):
        choices = kwargs.pop('choices')
        super(VmAddInterfaceForm, self).__init__(*args, **kwargs)

        field = forms.ModelChoiceField(
            queryset=choices, required=True, label=_('Vlan'))
        if not choices:
            field.widget.attrs['disabled'] = 'disabled'
            field.empty_label = _('No more networks.')
        self.fields['vlan'] = field

    @property
    def helper(self):
        helper = FormHelper(self)
        helper.form_tag = False
        return helper


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class CircleAuthenticationForm(AuthenticationForm):
    # fields: username, password

    @property
    def helper(self):
        helper = FormHelper()
        helper.form_show_labels = False
        helper.layout = Layout(
            AnyTag(
                "div",
                AnyTag(
                    "span",
                    AnyTag(
                        "i",
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                        css_class="fa fa-user",
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                    ),
                    css_class="input-group-addon",
                ),
                Field("username", placeholder=_("Username"),
                      css_class="form-control"),
                css_class="input-group",
            ),
            AnyTag(
                "div",
                AnyTag(
                    "span",
                    AnyTag(
                        "i",
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                        css_class="fa fa-lock",
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                    ),
                    css_class="input-group-addon",
                ),
                Field("password", placeholder=_("Password"),
                      css_class="form-control"),
                css_class="input-group",
            ),
        )
        helper.add_input(Submit("submit", _("Sign in"),
                                css_class="btn btn-success"))
        return helper


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class CirclePasswordResetForm(PasswordResetForm):
    # fields: email

    @property
    def helper(self):
        helper = FormHelper()
        helper.form_show_labels = False
        helper.layout = Layout(
            AnyTag(
                "div",
                AnyTag(
                    "span",
                    AnyTag(
                        "i",
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                        css_class="fa fa-envelope",
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                    ),
                    css_class="input-group-addon",
                ),
                Field("email", placeholder=_("Email address"),
                      css_class="form-control"),
                Div(
                    AnyTag(
                        "button",
                        HTML(_("Reset password")),
                        css_class="btn btn-success",
                    ),
                    css_class="input-group-btn",
                ),
                css_class="input-group",
            ),
        )
        return helper


class CircleSetPasswordForm(SetPasswordForm):

    @property
    def helper(self):
        helper = FormHelper()
        helper.add_input(Submit("submit", _("Change password"),
                                css_class="btn btn-success change-password",
                                css_id="submit-password-button"))
        return helper


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class LinkButton(BaseInput):
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    """
    Used to create a link button descriptor for the {% crispy %} template tag::

        back = LinkButton('back', 'Back', reverse_lazy('index'))

    .. note:: The first argument is also slugified and turned into the id for
              the submit button.
    """
    template = "bootstrap/layout/linkbutton.html"
    field_classes = 'btn btn-default'

    def __init__(self, name, text, url, *args, **kwargs):
        self.href = url
        super(LinkButton, self).__init__(name, text, *args, **kwargs)


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class NumberInput(TextInput):
    input_type = "number"


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class NumberField(Field):
    template = "crispy_forms/numberfield.html"

    def __init__(self, *args, **kwargs):
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        kwargs['min'] = 0
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        super(NumberField, self).__init__(*args, **kwargs)


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class AnyTag(Div):
    template = "crispy_forms/anytag.html"

    def __init__(self, tag, *fields, **kwargs):
        self.tag = tag
        super(AnyTag, self).__init__(*fields, **kwargs)

    def render(self, form, form_style, context, template_pack=TEMPLATE_PACK):
        fields = ''
        for field in self.fields:
            fields += render_field(field, form, form_style, context,
                                   template_pack=template_pack)

        return render_to_string(self.template, Context({'tag': self,
                                                        'fields': fields}))


class WorkingBaseInput(BaseInput):
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    def __init__(self, name, value, input_type="text", **kwargs):
        self.input_type = input_type
        self.field_classes = ""  # we need this for some reason
        super(WorkingBaseInput, self).__init__(name, value, **kwargs)
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class TraitForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super(TraitForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper(self)
        self.helper.form_show_labels = False
        self.helper.layout = Layout(
            Div(
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                Field('name', id="node-details-traits-input",
                      css_class="input-sm input-traits"),
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                Div(
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                    Submit("submit", _("Add trait"),
                           css_class="btn btn-primary btn-sm input-traits"),
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                    css_class="input-group-btn",
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                ),
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                css_class="input-group",
                id="node-details-traits-form",
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            ),
        )

    class Meta:
        model = Trait
        fields = ['name']
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class MyProfileForm(forms.ModelForm):
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    preferred_language = forms.ChoiceField(LANGUAGES_WITH_CODE)
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    class Meta:
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        fields = ('preferred_language', 'email_notifications',
                  'use_gravatar', )
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        model = Profile

    @property
    def helper(self):
        helper = FormHelper()
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        helper.add_input(Submit("submit", _("Save")))
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        return helper

    def save(self, *args, **kwargs):
        value = super(MyProfileForm, self).save(*args, **kwargs)
        return value
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class UnsubscribeForm(forms.ModelForm):

    class Meta:
        fields = ('email_notifications', )
        model = Profile

    @property
    def helper(self):
        helper = FormHelper()
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        helper.add_input(Submit("submit", _("Save")))
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        return helper


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class CirclePasswordChangeForm(PasswordChangeForm):

    @property
    def helper(self):
        helper = FormHelper()
        helper.add_input(Submit("submit", _("Change password"),
                                css_class="btn btn-primary",
                                css_id="submit-password-button"))
        return helper
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class UserCreationForm(OrgUserCreationForm):

    class Meta:
        model = User
        fields = ("username", 'email', 'first_name', 'last_name')

    @property
    def helper(self):
        helper = FormHelper()
        helper.layout = Layout('username', 'password1', 'password2', 'email',
                               'first_name', 'last_name')
        helper.add_input(Submit("submit", _("Save")))
        return helper

    def save(self, commit=True):
        user = super(UserCreationForm, self).save(commit=False)
        user.set_password(self.cleaned_data["password1"])
        if commit:
            user.save()
        return user
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class AclUserAddForm(forms.Form):
    name = forms.CharField(widget=autocomplete_light.TextWidget(
        'AclUserAutocomplete', attrs={'class': 'form-control'}))


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class UserKeyForm(forms.ModelForm):
    name = forms.CharField(required=True, label=_('Name'))
    key = forms.CharField(
        label=_('Key'), required=True,
        help_text=_('For example: ssh-rsa AAAAB3NzaC1yc2ED...'),
        widget=forms.Textarea(attrs={'rows': 5}))

    class Meta:
        fields = ('name', 'key')
        model = UserKey

    @property
    def helper(self):
        helper = FormHelper()
        helper.add_input(Submit("submit", _("Save")))
        return helper

    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop("user", None)
        super(UserKeyForm, self).__init__(*args, **kwargs)

    def clean(self):
        if self.user:
            self.instance.user = self.user
        return super(UserKeyForm, self).clean()
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class TraitsForm(forms.ModelForm):

    class Meta:
        model = Instance
        fields = ('req_traits', )

    @property
    def helper(self):
        helper = FormHelper()
        helper.form_show_labels = False
        helper.form_action = reverse_lazy("dashboard.views.vm-traits",
                                          kwargs={'pk': self.instance.pk})
        helper.add_input(Submit("submit", _("Save"),
                                css_class="btn btn-success", ))
        return helper


class RawDataForm(forms.ModelForm):
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    raw_data = forms.CharField(validators=[domain_validator],
                               widget=forms.Textarea(attrs={'rows': 5}),
                               required=False)
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    class Meta:
        model = Instance
        fields = ('raw_data', )

    @property
    def helper(self):
        helper = FormHelper()
        helper.form_show_labels = False
        helper.form_action = reverse_lazy("dashboard.views.vm-raw-data",
                                          kwargs={'pk': self.instance.pk})
        helper.add_input(Submit("submit", _("Save"),
                                css_class="btn btn-success",
                                css_id="submit-password-button"))
        return helper
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permissions_filtered = Permission.objects.exclude(
    codename__startswith="add_").exclude(
    codename__startswith="delete_").exclude(
    codename__startswith="change_")


class GroupPermissionForm(forms.ModelForm):
    permissions = forms.ModelMultipleChoiceField(
        queryset=permissions_filtered,
        widget=FilteredSelectMultiple(_("permissions"), is_stacked=False)
    )

    class Meta:
        model = Group
        fields = ('permissions', )

    @property
    def helper(self):
        helper = FormHelper()
        helper.form_show_labels = False
        helper.form_action = reverse_lazy(
            "dashboard.views.group-permissions",
            kwargs={'group_pk': self.instance.pk})
        helper.add_input(Submit("submit", _("Save"),
                                css_class="btn btn-success", ))
        return helper
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class VmResourcesForm(forms.ModelForm):
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    num_cores = forms.IntegerField(widget=forms.NumberInput(attrs={
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        'class': "form-control input-tags cpu-count-input",
        'min': 1,
        'max': 10,
        'required': "",
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    }),
        min_value=1, max_value=10,
    )
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    ram_size = forms.IntegerField(widget=forms.NumberInput(attrs={
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        'class': "form-control input-tags ram-input",
        'min': 128,
        'max': MAX_NODE_RAM,
        'step': 128,
        'required': "",
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    }),
        min_value=128, max_value=MAX_NODE_RAM,
    )
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    priority = forms.ChoiceField(priority_choices, widget=forms.Select(attrs={
        'class': "form-control input-tags cpu-priority-input",
    }))

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    def __init__(self, *args, **kwargs):
        self.can_edit = kwargs.pop("can_edit", None)
        super(VmResourcesForm, self).__init__(*args, **kwargs)

        if not self.can_edit:
            for name, field in self.fields.items():
                field.widget.attrs['disabled'] = "disabled"

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    class Meta:
        model = Instance
        fields = ('num_cores', 'priority', 'ram_size', )
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vm_search_choices = (
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    ("owned", _("owned")),
    ("shared", _("shared")),
    ("all", _("all")),
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)


class VmListSearchForm(forms.Form):
    s = forms.CharField(widget=forms.TextInput(attrs={
        'class': "form-control input-tags",
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        'placeholder': _("Search...")
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    }))

    stype = forms.ChoiceField(vm_search_choices, widget=forms.Select(attrs={
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        'class': "btn btn-default form-control input-tags",
        'style': "min-width: 80px;",
    }))

    include_deleted = forms.BooleanField(widget=forms.CheckboxInput(attrs={
        'id': "vm-list-search-checkbox",
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    }))
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    def __init__(self, *args, **kwargs):
        super(VmListSearchForm, self).__init__(*args, **kwargs)
        # set initial value, otherwise it would be overwritten by request.GET
        if not self.data.get("stype"):
            data = self.data.copy()
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            data['stype'] = "all"
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            self.data = data
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class TemplateListSearchForm(forms.Form):
    s = forms.CharField(widget=forms.TextInput(attrs={
        'class': "form-control input-tags",
        'placeholder': _("Search...")
    }))

    stype = forms.ChoiceField(vm_search_choices, widget=forms.Select(attrs={
        'class': "btn btn-default input-tags",
    }))

    def __init__(self, *args, **kwargs):
        super(TemplateListSearchForm, self).__init__(*args, **kwargs)
        # set initial value, otherwise it would be overwritten by request.GET
        if not self.data.get("stype"):
            data = self.data.copy()
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            data['stype'] = "owned"
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            self.data = data