node.py

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# -*- coding: utf-8 -*-
# @COPYRIGHT_begin
#
# Copyright [2010-2014] Institute of Nuclear Physics PAN, Krakow, Poland
#
# Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.
#
# @COPYRIGHT_end

##
# @package src.wi.views.admin_cm.view_node
# @author Krzysztof Danielowski
# @author Piotr Wójcik
# @date 03.02.2012
# 

from django.template import RequestContext
from django.template.loader import render_to_string
from django.utils.translation import ugettext as _
from django.views.decorators.csrf import csrf_protect

from wi.commontags.templatetags.templatetags import filesizeformatmb
from wi.forms.storage import MountStorageForm
from wi.utils import messages_ajax
from wi.utils.decorators import admin_cm_permission, django_view
from wi.utils.messages_ajax import ajax_request
from wi.utils.states import node_states_reversed as node_states
from wi.utils.views import prep_data


@django_view
@ajax_request
@admin_cm_permission
##
# 
#     Ajax view fetching node list.
#     
def cma_ajax_get_table_nodes(request):
    if request.method == 'GET':
        nodes = prep_data('admin_cm/node/get_list/', request.session)
        for item in nodes:
            item['stateName'] = unicode(node_states[item['state']])
            item['memory_free'] = filesizeformatmb(item['memory_free'])
            item['memory_total'] = filesizeformatmb(item['memory_total'])
            item['description'] = item['comment']

        return messages_ajax.success(nodes)


@django_view
@ajax_request
@admin_cm_permission
##
# 
#     Ajax view fetching node details.
#     
def cma_ajax_node_details(request, node_id, template_name='admin_cm/ajax/node_details.html'):
    if request.method == 'POST':
        node = prep_data(('admin_cm/node/get_by_id_details/', {'node_id': node_id}), request.session)
        return messages_ajax.success(render_to_string(template_name, {'node_id': node_id,
                                                                      'node': node,
                                                                      'node_states': node_states},
                                     context_instance=RequestContext(request)))


@django_view
@ajax_request
@admin_cm_permission
@csrf_protect
##
# 
#     Ajax view handling node to storage mounting.
#     
def cma_ajax_mount_storage(request, node_id, template_name='generic/form.html', form_class=MountStorageForm):
    rest_data = prep_data({'storages': 'admin_cm/storage/get_list/'}, request.session)

    if request.method == 'POST':
        form = form_class(data=request.POST, files=request.FILES, rest_data=rest_data)
        if form.is_valid():
            rest_data2 = prep_data({'storage': ('admin_cm/storage/mount/', {'node_id': int(node_id),
                                                                            'storage_id': int(form.cleaned_data['storage_id'])}), },
                                   request.session)

            all_ok = True
            storage = rest_data2['storage']
            for key in storage.keys():
                for key2 in storage[key].keys():
                    if storage[key][key2] != 'mounted':
                        all_ok = False
            if all_ok:
                return messages_ajax.success(_('You have successfully mounted storage(s) to selected node.'))
            else:
                resp = []
                for key in storage.keys():
                    for key2 in storage[key].keys():
                        if storage[key][key2] != 'mounted':
                            resp.append({'type': 'storage-node',
                                         'storage_id': key,
                                         'node_id': key2,
                                         'status_text': storage[key][key2]
                                        })
                return messages_ajax.success(resp, 7999)
    else:
        form = form_class(rest_data=rest_data)
    return messages_ajax.success(render_to_string(template_name,
                                                   {'form': form,
                                                    'confirmation': _('Mount'),
                                                    'text': ''},
                                                   context_instance=RequestContext(request)),
                                status=1)