path: root/src/workflow/models.py

##############################################################################
# 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.contrib.auth.models import User
from django.db import models
from django.shortcuts import render
from django.contrib import messages

import yaml
import requests

from workflow.forms import ConfirmationForm
from api.models import *
from dashboard.exceptions import *
from resource_inventory.models import *
from resource_inventory.resource_manager import ResourceManager
from notifier.manager import NotificationHandler


class BookingAuthManager():
    LFN_PROJECTS = ["opnfv"]  # TODO

    def parse_url(self, info_url):
        """
        will return the PTL in the INFO file on success, or None
        """
        try:
            parts = info_url.split("/")
            if parts[0].find("http") > -1:  # the url include http(s)://
                parts = parts[2:]
            if parts[-1] != "INFO.yaml":
                return None
            if parts[0] not in ["github.com", "raw.githubusercontent.com"]:
                return None
            if parts[1] not in self.LFN_PROJECTS:
                return None
            # now to download and parse file
            if parts[3] == "blob":
                parts[3] = "raw"
            url = "https://" + "/".join(parts)
            info_file = requests.get(url, timeout=15).text
            info_parsed = yaml.load(info_file)
            ptl = info_parsed.get('project_lead')
            if not ptl:
                return None
            return ptl

        except Exception as e:
            return None


    def booking_allowed(self, booking, repo):
        """
        This is the method that will have to change whenever the booking policy changes in the Infra
        group / LFN. This is a nice isolation of that administration crap
        currently checks if the booking uses multiple servers. if it does, then the owner must be a PTL,
        which is checked using the provided info file
        """
        if len(booking.resource.template.getHosts()) < 2:
            return True  #if they only have one server, we dont care
        if booking.owner.userprofile.booking_privledge:
            return True  # admin override for this user
        if repo.BOOKING_INFO_FILE not in repo.el:
            return False  # INFO file not provided
        ptl_info = self.parse_url(repo.BOOKING_INFO_FILE)
        return ptl_info and  ptl_info == booking.owner.userprofile.email_addr



class WorkflowStep(object):

    template = 'bad_request.html'
    title = "Generic Step"
    description = "You were led here by mistake"
    short_title = "error"
    metastep = None

    def __init__(self, id, repo=None):
        self.repo = repo
        self.id = id

    def get_context(self):
        context = {}
        context['step_number'] = self.repo_get('steps')
        context['active_step'] = self.repo_get('active_step')
        context['render_correct'] = "true"
        context['step_title'] = self.title
        context['description'] = self.description
        return context

    def render(self, request):
        self.context = self.get_context()
        return render(request, self.template, self.context)

    def post_render(self, request):
        return self.render(request)

    def test_render(self, request):
        if request.method == "POST":
            return self.post_render(request)
        return self.render(request)

    def validate(self, request):
        pass

    def repo_get(self, key, default=None):
        return self.repo.get(key, default, self.id)

    def repo_put(self, key, value):
        return self.repo.put(key, value, self.id)

class Confirmation_Step(WorkflowStep):
    template = 'workflow/confirm.html'
    title = "Confirm Changes"
    description = "Does this all look right?"

    def get_vlan_warning(self):
        grb = self.repo_get(self.repo.BOOKING_SELECTED_GRB, False)
        if not grb:
            return 0
        vlan_manager = grb.lab.vlan_manager
        if vlan_manager is None:
            return 0
        hosts = grb.getHosts()
        for host in hosts:
            for interface in host.generic_interfaces.all():
                for vlan in interface.vlans.all():
                    if vlan.public:
                        if not vlan_manager.public_vlan_is_available(vlan.vlan_id):
                            return 1
                    else:
                        if not vlan_manager.is_available(vlan.vlan_id):
                            return 1  # There is a problem with these vlans
        return 0


    def get_context(self):
        context = super(Confirmation_Step, self).get_context()
        context['form'] = ConfirmationForm()
        context['confirmation_info'] = yaml.dump(
                self.repo_get(self.repo.CONFIRMATION),
                default_flow_style=False
                ).strip()
        context['vlan_warning'] = self.get_vlan_warning()

        return context

    def flush_to_db(self):
        errors = self.repo.make_models()
        if errors:
            return errors

    def post_render(self, request):
        form = ConfirmationForm(request.POST)
        if form.is_valid():
            data = form.cleaned_data['confirm']
            context = self.get_context()
            if data == "True":
                context["bypassed"] = "true"
                errors = self.flush_to_db()
                if errors:
                    messages.add_message(request, messages.ERROR, "ERROR OCCURRED: " + errors)
                    return render(request, self.template, context)
                messages.add_message(request, messages.SUCCESS, "Confirmed")
                return render(request, self.template, context)
            elif data == "False":
                context["bypassed"] = "true"
                messages.add_message(request, messages.SUCCESS, "Canceled")
                return render(request, self.template, context)
            else:
                pass

        else:
            if "vlan_input" in request.POST:
                if request.POST.get("vlan_input") == "True":
                    self.translate_vlans()
                    return self.render(request)
            pass

    def translate_vlans(self):
        grb = self.repo_get(self.repo.BOOKING_SELECTED_GRB, False)
        if not grb:
            return 0
        vlan_manager = grb.lab.vlan_manager
        if vlan_manager is None:
            return 0
        hosts = grb.getHosts()
        for host in hosts:
            for interface in host.generic_interfaces.all():
                for vlan in interface.vlans.all():
                    if not vlan.public:
                        if not vlan_manager.is_available(vlan.vlan_id):
                            vlan.vlan_id = vlan_manager.get_vlan()
                            vlan.save()
                    else:
                        if not vlan_manager.public_vlan_is_available(vlan.vlan_id):
                            pub_vlan = vlan_manager.get_public_vlan()
                            vlan.vlan_id = pub_vlan.vlan
                            vlan.save()


class Workflow():

    steps = []
    active_index = 0

class Repository():

    EDIT = "editing"
    MODELS = "models"
    RESOURCE_SELECT = "resource_select"
    CONFIRMATION = "confirmation"
    SELECTED_GRESOURCE_BUNDLE = "selected generic bundle pk"
    GRESOURCE_BUNDLE_MODELS = "generic_resource_bundle_models"
    GRESOURCE_BUNDLE_INFO = "generic_resource_bundle_info"
    BOOKING = "booking"
    LAB = "lab"
    GRB_LAST_HOSTLIST = "grb_network_previous_hostlist"
    BOOKING_FORMS = "booking_forms"
    SWCONF_HOSTS = "swconf_hosts"
    SWCONF_SELECTED_GRB = "swconf_selected_grb_pk"
    BOOKING_SELECTED_GRB = "booking_selected_grb_pk"
    BOOKING_MODELS = "booking models"
    CONFIG_MODELS = "configuration bundle models"
    SESSION_USER = "session owner user account"
    VALIDATED_MODEL_GRB = "valid grb config model instance in db"
    VALIDATED_MODEL_CONFIG = "valid config model instance in db"
    VALIDATED_MODEL_BOOKING = "valid booking model instance in db"
    VLANS = "a list of vlans"
    SNAPSHOT_MODELS = "the models for snapshotting"
    SNAPSHOT_BOOKING_ID = "the booking id for snapshotting"
    SNAPSHOT_NAME = "the name of the snapshot"
    SNAPSHOT_DESC = "description of the snapshot"
    BOOKING_INFO_FILE = "the INFO.yaml file for this user's booking"


    def get(self, key, default, id):
        self.add_get_history(key, id)
        return self.el.get(key, default)

    def put(self,key,val, id):
        self.add_put_history(key, id)
        self.el[key] = val

    def add_get_history(self, key, id):
        self.add_history(key, id, self.get_history)

    def add_put_history(self, key, id):
        self.add_history(key, id, self.put_history)

    def add_history(self, key, id, history):
        if not key in history:
            history[key] = [id]
        else:
            history[key].append(id)

    def make_models(self):
        if self.SNAPSHOT_MODELS in self.el:
            errors = self.make_snapshot()
            if errors:
                return errors
        #if GRB WF, create it
        if self.GRESOURCE_BUNDLE_MODELS in self.el:
            errors = self.make_generic_resource_bundle()
            if errors:
                return errors

        if self.CONFIG_MODELS in self.el:
            errors = self.make_software_config_bundle()
            if errors:
                return errors

        if self.BOOKING_MODELS in self.el:
            errors = self.make_booking()
            if errors:
                return errors
            # create notification
            booking = self.el[self.BOOKING_MODELS]['booking']
            NotificationHandler.notify_new_booking(booking)


    def make_snapshot(self):
        owner = self.el[self.SESSION_USER]
        models = self.el[self.SNAPSHOT_MODELS]
        image = models.get('snapshot', Image())
        booking_id = self.el.get(self.SNAPSHOT_BOOKING_ID)
        if not booking_id:
            return "SNAP, No booking ID provided"
        booking = Booking.objects.get(pk=booking_id)
        name = self.el.get(self.SNAPSHOT_NAME)
        if not name:
            return "SNAP, no name provided"
        host = models.get('host')
        if not host:
            return "SNAP, no host provided"
        description = self.el.get(self.SNAPSHOT_DESC, "")
        image.from_lab = booking.lab
        image.name = name
        image.description = description
        image.public = False
        image.lab_id = -1
        image.owner = owner
        image.host_type = host.profile
        image.save()


    def make_generic_resource_bundle(self):
        owner = self.el[self.SESSION_USER]
        if self.GRESOURCE_BUNDLE_MODELS in self.el:
            models = self.el[self.GRESOURCE_BUNDLE_MODELS]
            if 'hosts' in models:
                hosts = models['hosts']
            else:
                return "GRB has no hosts. CODE:0x0002"
            if 'bundle' in models:
                bundle = models['bundle']
            else:
                return "GRB, no bundle in models. CODE:0x0003"

            try:
                bundle.owner = owner
                bundle.save()
            except Exception as e:
                return "GRB, saving bundle generated exception: " + str(e) + " CODE:0x0004"
            try:
                for host in hosts:
                    genericresource = host.resource
                    genericresource.bundle = bundle
                    genericresource.save()
                    host.resource = genericresource
                    host.save()
            except Exception as e:
                return "GRB, saving hosts generated exception: " + str(e) + " CODE:0x0005"

            if 'interfaces' in models:
                for interface_set in models['interfaces'].values():
                    for interface in interface_set:
                        try:
                            interface.host = interface.host
                            interface.save()
                        except Exception as e:
                            return "GRB, saving interface " + str(interface) + " failed. CODE:0x0019"
            else:
                return "GRB, no interface set provided. CODE:0x001a"

            if 'vlans' in models:
                for resource_name, mapping in models['vlans'].items():
                    for profile_name, vlan_set in mapping.items():
                        interface = GenericInterface.objects.get(
                                profile__name=profile_name,
                                host__resource__name=resource_name,
                                host__resource__bundle=models['bundle']
                                )
                        for vlan in vlan_set:
                            try:
                                vlan.save()
                                interface.vlans.add(vlan)
                            except Exception as e:
                                return "GRB, saving vlan " + str(vlan) + " failed. Exception: " + str(e) + ". CODE:0x0017"
            else:
                return "GRB, no vlan set provided. CODE:0x0018"


        else:
            return "GRB no models given. CODE:0x0001"

        self.el[self.VALIDATED_MODEL_GRB] = bundle
        return False


    def make_software_config_bundle(self):
        owner = self.el[self.SESSION_USER]
        models = self.el[self.CONFIG_MODELS]
        if 'bundle' in models:
            bundle = models['bundle']
            bundle.bundle = bundle.bundle
            try:
                bundle.save()
            except Exception as e:
                return "SWC, saving bundle generated exception: " + str(e) + "CODE:0x0007"

        else:
            return "SWC, no bundle in models. CODE:0x0006"
        if 'host_configs' in models:
            host_configs = models['host_configs']
            for host_config in host_configs:
                host_config.bundle = host_config.bundle
                host_config.host = host_config.host
                try:
                    host_config.save()
                except Exception as e:
                    return "SWC, saving host configs generated exception: " + str(e) + "CODE:0x0009"
        else:
            return "SWC, no host configs in models. CODE:0x0008"
        if 'opnfv' in models:
            opnfvconfig = models['opnfv']
            opnfvconfig.bundle = opnfvconfig.bundle
            if not opnfvconfig.scenario in opnfvconfig.installer.sup_scenarios.all():
                return "SWC, scenario not supported by installer. CODE:0x000d"
            try:
                opnfvconfig.save()
            except Exception as e:
                return "SWC, saving opnfv config generated exception: " + str(e) + "CODE:0x000b"
        else:
            pass

        self.el[self.VALIDATED_MODEL_CONFIG] = bundle
        return False


    def make_booking(self):
        models = self.el[self.BOOKING_MODELS]
        owner = self.el[self.SESSION_USER]

        if self.BOOKING_SELECTED_GRB in self.el:
            selected_grb = self.el[self.BOOKING_SELECTED_GRB]
        else:
            return "BOOK, no selected resource. CODE:0x000e"

        if not self.reserve_vlans(selected_grb):
            return "BOOK, vlans not available"

        if 'booking' in models:
            booking = models['booking']
        else:
            return "BOOK, no booking model exists. CODE:0x000f"

        if not booking.start:
            return "BOOK, booking has no start. CODE:0x0010"
        if not booking.end:
            return "BOOK, booking has no end. CODE:0x0011"
        if booking.end <= booking.start:
            return "BOOK, end before/same time as start. CODE:0x0012"

        if 'collaborators' in models:
            collaborators = models['collaborators']
        else:
            return "BOOK, collaborators not defined. CODE:0x0013"
        try:
            resource_bundle = ResourceManager.getInstance().convertResourceBundle(selected_grb, config=booking.config_bundle)
        except ResourceAvailabilityException as e:
            return "BOOK, requested resources are not available. Exception: " + str(e) + " CODE:0x0014"
        except ModelValidationException as e:
            return "Error encountered when saving bundle. " + str(e) + " CODE: 0x001b"

        booking.resource = resource_bundle
        booking.owner = owner
        booking.config_bundle = booking.config_bundle
        booking.lab = selected_grb.lab

        is_allowed = BookingAuthManager().booking_allowed(booking, self)
        if not is_allowed:
            return "BOOK, you are not allowed to book the requested resources"

        try:
            booking.save()
        except Exception as e:
            return "BOOK, saving booking generated exception: " + str(e) + " CODE:0x0015"

        for collaborator in collaborators:
            booking.collaborators.add(collaborator)

        try:
            JobFactory.makeCompleteJob(booking)
        except Exception as e:
            return "BOOK, serializing for api generated exception: " + str(e) + " CODE:0xFFFF"

        try:
            booking.save()
        except Exception as e:
            return "BOOK, saving booking generated exception: " + str(e) + " CODE:0x0016"

    def reserve_vlans(self, grb):
        """
        True is success
        """
        vlans = []
        public_vlan = None
        vlan_manager = grb.lab.vlan_manager
        if vlan_manager is None:
            return True
        for host in grb.getHosts():
            for interface in host.generic_interfaces.all():
                for vlan in interface.vlans.all():
                    if vlan.public:
                        public_vlan = vlan
                    else:
                        vlans.append(vlan.vlan_id)

        try:
            vlan_manager.reserve_vlans(vlans)
            vlan_manager.reserve_public_vlan(public_vlan.vlan_id)
            return True
        except Exception as e:
            return False


    def __init__(self):
        self.el = {}
        self.el[self.CONFIRMATION] = {}
        self.get_history = {}
        self.put_history = {}