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##############################################################################
# Copyright (c) 2018 Sawyer Bergeron, Parker Berberian, and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
from django.http import JsonResponse
from django.http.request import QueryDict
from django.urls import reverse
from booking.models import Booking
from workflow.workflow_factory import WorkflowFactory
from workflow.models import Repository
from resource_inventory.models import (
ResourceTemplate,
ResourceConfiguration,
OPNFVConfig
)
from workflow.forms import ManagerForm
import logging
logger = logging.getLogger(__name__)
class SessionManager():
def active_workflow(self):
return self.workflows[-1]
def __init__(self, request=None):
self.workflows = []
self.owner = request.user
self.factory = WorkflowFactory()
self.result = None
def set_step_statuses(self, superclass_type, desired_enabled=True):
workflow = self.active_workflow()
steps = workflow.steps
for step in steps:
if isinstance(step, superclass_type):
if desired_enabled:
step.enable()
else:
step.disable()
def add_workflow(self, workflow_type=None, **kwargs):
repo = Repository()
if (len(self.workflows) >= 1):
defaults = self.workflows[-1].repository.get_child_defaults()
repo.set_defaults(defaults)
repo.el[repo.HAS_RESULT] = False
repo.el[repo.SESSION_USER] = self.owner
repo.el[repo.SESSION_MANAGER] = self
self.workflows.append(
self.factory.create_workflow(
workflow_type=workflow_type,
repo=repo
)
)
def get_redirect(self):
if isinstance(self.result, Booking):
return reverse('booking:booking_detail', kwargs={'booking_id': self.result.id})
return "/"
def pop_workflow(self, discard=False):
multiple_wfs = len(self.workflows) > 1
if multiple_wfs:
if self.workflows[-1].repository.el[Repository.RESULT]: # move result
key = self.workflows[-1].repository.el[Repository.RESULT_KEY]
result = self.workflows[-1].repository.el[Repository.RESULT]
self.workflows[-2].repository.el[key] = result
prev_workflow = self.workflows.pop()
if self.workflows:
current_repo = self.workflows[-1].repository
else:
current_repo = prev_workflow.repository
self.result = current_repo.el[current_repo.RESULT]
if discard:
current_repo.cancel()
return multiple_wfs, self.result
def status(self, request):
return {
"steps": [step.to_json() for step in self.active_workflow().steps],
"active": self.active_workflow().repository.el['active_step'],
"workflow_count": len(self.workflows)
}
def handle_post(self, request):
form = ManagerForm(request.POST)
if form.is_valid():
self.get_active_step().post(
QueryDict(form.cleaned_data['step_form']),
user=request.user
)
# change step
if form.cleaned_data['step'] == 'prev':
self.go_prev()
if form.cleaned_data['step'] == 'next':
self.go_next()
else:
pass # Exception?
def handle_request(self, request):
if request.method == 'POST':
self.handle_post(request)
return self.render(request)
def render(self, request, **kwargs):
if self.workflows:
return JsonResponse({
"meta": self.status(request),
"content": self.get_active_step().render_to_string(request),
})
else:
return JsonResponse({
"redirect": self.get_redirect()
})
def post_render(self, request):
return self.active_workflow().steps[self.active_workflow().active_index].post_render(request)
def get_active_step(self):
return self.active_workflow().steps[self.active_workflow().active_index]
def go_next(self, **kwargs):
# need to verify current step is valid to allow this
if self.get_active_step().valid < 200:
return
next_step = self.active_workflow().active_index + 1
if next_step >= len(self.active_workflow().steps):
raise Exception("Out of bounds request for step")
while not self.active_workflow().steps[next_step].enabled:
next_step += 1
self.active_workflow().repository.el['active_step'] = next_step
self.active_workflow().active_index = next_step
def go_prev(self, **kwargs):
prev_step = self.active_workflow().active_index - 1
if prev_step < 0:
raise Exception("Out of bounds request for step")
while not self.active_workflow().steps[prev_step].enabled:
prev_step -= 1
self.active_workflow().repository.el['active_step'] = prev_step
self.active_workflow().active_index = prev_step
def prefill_repo(self, target_id, workflow_type):
self.repository.el[self.repository.EDIT] = True
edit_object = None
if workflow_type == 0:
edit_object = Booking.objects.get(pk=target_id)
self.prefill_booking(edit_object)
elif workflow_type == 1:
edit_object = ResourceTemplate.objects.get(pk=target_id)
self.prefill_resource(edit_object)
elif workflow_type == 2:
edit_object = ResourceTemplate.objects.get(pk=target_id)
self.prefill_config(edit_object)
def prefill_booking(self, booking):
models = self.make_booking_models(booking)
confirmation = self.make_booking_confirm(booking)
self.active_workflow().repository.el[self.active_workflow().repository.BOOKING_MODELS] = models
self.active_workflow().repository.el[self.active_workflow().repository.CONFIRMATION] = confirmation
self.active_workflow().repository.el[self.active_workflow().repository.RESOURCE_TEMPLATE_MODELS] = self.make_grb_models(booking.resource.template)
self.active_workflow().repository.el[self.active_workflow().repository.SELECTED_RESOURCE_TEMPLATE] = self.make_grb_models(booking.resource.template)['bundle']
self.active_workflow().repository.el[self.active_workflow().repository.CONFIG_MODELS] = self.make_config_models(booking.config_bundle)
def prefill_resource(self, resource):
models = self.make_grb_models(resource)
confirm = self.make_grb_confirm(resource)
self.active_workflow().repository.el[self.active_workflow().repository.RESOURCE_TEMPLATE_MODELS] = models
self.active_workflow().repository.el[self.active_workflow().repository.CONFIRMATION] = confirm
def prefill_config(self, config):
models = self.make_config_models(config)
confirm = self.make_config_confirm(config)
self.active_workflow().repository.el[self.active_workflow().repository.CONFIG_MODELS] = models
self.active_workflow().repository.el[self.active_workflow().repository.CONFIRMATION] = confirm
grb_models = self.make_grb_models(config.bundle)
self.active_workflow().repository.el[self.active_workflow().repository.RESOURCE_TEMPLATE_MODELS] = grb_models
def make_grb_models(self, resource):
models = self.active_workflow().repository.el.get(self.active_workflow().repository.RESOURCE_TEMPLATE_MODELS, {})
models['hosts'] = []
models['bundle'] = resource
models['interfaces'] = {}
models['vlans'] = {}
for host in resource.getResources():
models['hosts'].append(host)
models['interfaces'][host.resource.name] = []
models['vlans'][host.resource.name] = {}
for interface in host.generic_interfaces.all():
models['interfaces'][host.resource.name].append(interface)
models['vlans'][host.resource.name][interface.profile.name] = []
for vlan in interface.vlans.all():
models['vlans'][host.resource.name][interface.profile.name].append(vlan)
return models
def make_grb_confirm(self, resource):
confirm = self.active_workflow().repository.el.get(self.active_workflow().repository.CONFIRMATION, {})
confirm['resource'] = {}
confirm['resource']['hosts'] = []
confirm['resource']['lab'] = resource.lab.lab_user.username
for host in resource.getResources():
confirm['resource']['hosts'].append({"name": host.resource.name, "profile": host.profile.name})
return confirm
def make_config_models(self, config):
models = self.active_workflow().repository.el.get(self.active_workflow().repository.CONFIG_MODELS, {})
models['bundle'] = config
models['host_configs'] = []
for host_conf in ResourceConfiguration.objects.filter(bundle=config):
models['host_configs'].append(host_conf)
models['opnfv'] = OPNFVConfig.objects.filter(bundle=config).last()
return models
def make_config_confirm(self, config):
confirm = self.active_workflow().repository.el.get(self.active_workflow().repository.CONFIRMATION, {})
confirm['configuration'] = {}
confirm['configuration']['hosts'] = []
confirm['configuration']['name'] = config.name
confirm['configuration']['description'] = config.description
opnfv = OPNFVConfig.objects.filter(bundle=config).last()
confirm['configuration']['installer'] = opnfv.installer.name
confirm['configuration']['scenario'] = opnfv.scenario.name
for host_conf in ResourceConfiguration.objects.filter(bundle=config):
h = {"name": host_conf.host.resource.name, "image": host_conf.image.name, "role": host_conf.opnfvRole.name}
confirm['configuration']['hosts'].append(h)
return confirm
def make_booking_models(self, booking):
models = self.active_workflow().repository.el.get(self.active_workflow().repository.BOOKING_MODELS, {})
models['booking'] = booking
models['collaborators'] = []
for user in booking.collaborators.all():
models['collaborators'].append(user)
return models
def make_booking_confirm(self, booking):
confirm = self.active_workflow().repository.el.get(self.active_workflow().repository.CONFIRMATION, {})
confirm['booking'] = {}
confirm['booking']['length'] = (booking.end - booking.start).days
confirm['booking']['project'] = booking.project
confirm['booking']['purpose'] = booking.purpose
confirm['booking']['resource name'] = booking.resource.template.name
confirm['booking']['configuration name'] = booking.config_bundle.name
confirm['booking']['collaborators'] = []
for user in booking.collaborators.all():
confirm['booking']['collaborators'].append(user.username)
return confirm
class ManagerTracker():
instance = None
managers = {}
def __init__(self):
pass
@staticmethod
def getInstance():
if ManagerTracker.instance is None:
ManagerTracker.instance = ManagerTracker()
return ManagerTracker.instance
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