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path: root/releng/views.py
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from base64 import b64decode
import json

from django import forms
from django.conf import settings
from django.core.serializers.json import DjangoJSONEncoder
from django.core.urlresolvers import reverse
from django.db.models import Count, Max
from django.http import Http404, HttpResponse
from django.shortcuts import get_object_or_404, redirect, render
from django.views.generic import DetailView, ListView

from .models import (Architecture, BootType, Bootloader, ClockChoice,
        Filesystem, HardwareType, InstallType, Iso, IsoType, Module, Source,
        Test, Release)


def standard_field(model, empty_label=None, help_text=None, required=True):
    return forms.ModelChoiceField(queryset=model.objects.all(),
        widget=forms.RadioSelect(), empty_label=empty_label,
        help_text=help_text, required=required)


class TestForm(forms.ModelForm):
    iso = forms.ModelChoiceField(queryset=Iso.objects.filter(
        active=True).order_by('-id'))
    architecture = standard_field(Architecture)
    iso_type = standard_field(IsoType)
    boot_type = standard_field(BootType)
    hardware_type = standard_field(HardwareType)
    install_type = standard_field(InstallType)
    source = standard_field(Source)
    clock_choice = standard_field(ClockChoice)
    filesystem = standard_field(Filesystem,
            help_text="Verify /etc/fstab, `df -hT` output and commands like "
            "lvdisplay for special modules.")
    modules = forms.ModelMultipleChoiceField(queryset=Module.objects.all(),
            widget=forms.CheckboxSelectMultiple(), required=False)
    bootloader = standard_field(Bootloader,
            help_text="Verify that the entries in the bootloader config "
            "looks OK.")
    rollback_filesystem = standard_field(Filesystem,
            help_text="If you did a rollback followed by a new attempt to "
            "setup your blockdevices/filesystems, select which option you "
            "took here.",
            empty_label="N/A (did not rollback)", required=False)
    rollback_modules = forms.ModelMultipleChoiceField(
            queryset=Module.objects.all(),
            help_text="If you did a rollback followed by a new attempt to "
            "setup your blockdevices/filesystems, select which option you "
            "took here.",
            widget=forms.CheckboxSelectMultiple(), required=False)
    success = forms.BooleanField(
            help_text="Only check this if everything went fine. "
            "If you ran into problems please create a ticket on <a "
            "href=\""+settings.BUGTRACKER_RELENG_URL+"\">the "
            "bugtracker</a> (or check that one already exists) and link to "
            "it in the comments.",
            required=False)
    website = forms.CharField(label='',
            widget=forms.TextInput(attrs={'style': 'display:none;'}),
            required=False)

    class Meta:
        model = Test
        fields = ("user_name", "user_email", "iso", "architecture",
                  "iso_type", "boot_type", "hardware_type",
                  "install_type", "source", "clock_choice", "filesystem",
                  "modules", "bootloader", "rollback_filesystem",
                  "rollback_modules", "success", "comments")
        widgets = {
            "modules": forms.CheckboxSelectMultiple(),
        }


def submit_test_result(request):
    if request.POST:
        form = TestForm(request.POST)
        if form.is_valid() and request.POST['website'] == '':
            test = form.save(commit=False)
            test.ip_address = request.META.get("REMOTE_ADDR", None)
            test.save()
            form.save_m2m()
            return redirect('releng-test-thanks')
    else:
        form = TestForm()

    context = {'form': form}
    return render(request, 'releng/add.html', context)


def calculate_option_overview(field_name):
    field = Test._meta.get_field(field_name)
    model = field.rel.to
    is_rollback = field_name.startswith('rollback_')
    option = {
        'option': model,
        'field_name': field_name,
        'name': model._meta.verbose_name,
        'is_rollback': is_rollback,
        'values': []
    }
    if not is_rollback:
        successes = dict(model.objects.values_list('pk').filter(
            test__success=True).annotate(latest=Max('test__iso__id')))
        failures = dict(model.objects.values_list('pk').filter(
            test__success=False).annotate(latest=Max('test__iso__id')))
    else:
        successes = dict(model.objects.values_list('pk').filter(
            rollback_test_set__success=True).annotate(
                latest=Max('rollback_test_set__iso__id')))
        failures = dict(model.objects.values_list('pk').filter(
            rollback_test_set__success=False).annotate(
                latest=Max('rollback_test_set__iso__id')))

    for value in model.objects.all():
        data = {
            'value': value,
            'success': successes.get(value.pk),
            'failure': failures.get(value.pk),
        }
        option['values'].append(data)

    return option


def options_fetch_iso(options):
    '''Replaces the Iso PK with a full Iso model object in a list of options
    used on the overview page. We do it this way to only have to query the Iso
    table once rather than once per option.'''
    # collect all necessary Iso PKs
    all_pks = set()
    for option in options:
        all_pks.update(v['success'] for v in option['values'])
        all_pks.update(v['failure'] for v in option['values'])

    all_pks.discard(None)
    all_isos = Iso.objects.in_bulk(all_pks)

    for option in options:
        for value in option['values']:
            value['success'] = all_isos.get(value['success'])
            value['failure'] = all_isos.get(value['failure'])

    return options


def test_results_overview(request):
    # data structure produced:
    # [ {
    #     option, name, is_rollback,
    #     values: [ { value, success, failure } ... ]
    #   }
    #   ...
    # ]
    all_options = []
    fields = ['architecture', 'iso_type', 'boot_type', 'hardware_type',
            'install_type', 'source', 'clock_choice', 'filesystem', 'modules',
            'bootloader', 'rollback_filesystem', 'rollback_modules']
    for field in fields:
        all_options.append(calculate_option_overview(field))

    all_options = options_fetch_iso(all_options)

    context = {
            'options': all_options,
            'iso_url': settings.ISO_LIST_URL,
    }
    return render(request, 'releng/results.html', context)


def test_results_iso(request, iso_id):
    iso = get_object_or_404(Iso, pk=iso_id)
    test_list = iso.test_set.select_related()
    context = {
        'iso_name': iso.name,
        'test_list': test_list
    }
    return render(request, 'releng/result_list.html', context)


def test_results_for(request, option, value):
    if option not in Test._meta.get_all_field_names():
        raise Http404
    option_model = getattr(Test, option).field.rel.to
    option_model.verbose_name = option_model._meta.verbose_name
    real_value = get_object_or_404(option_model, pk=value)
    test_list = real_value.test_set.select_related().order_by(
            '-iso__name', '-pk')
    context = {
        'option': option_model,
        'value': real_value,
        'value_id': value,
        'test_list': test_list
    }
    return render(request, 'releng/result_list.html', context)


def submit_test_thanks(request):
    return render(request, "releng/thanks.html", None)


def iso_overview(request):
    isos = Iso.objects.all().order_by('-pk')
    successes = dict(Iso.objects.values_list('pk').filter(
        test__success=True).annotate(ct=Count('test')))
    failures = dict(Iso.objects.values_list('pk').filter(
        test__success=False).annotate(ct=Count('test')))
    for iso in isos:
        iso.successes = successes.get(iso.pk, 0)
        iso.failures = failures.get(iso.pk, 0)

    # only show "useful" rows, currently active ISOs or those with results
    isos = [iso for iso in isos if
            iso.active is True or iso.successes > 0 or iso.failures > 0]

    context = {
        'isos': isos
    }
    return render(request, 'releng/iso_overview.html', context)


class ReleaseListView(ListView):
    model = Release


class ReleaseDetailView(DetailView):
    model = Release
    slug_field = 'version'
    slug_url_kwarg = 'version'


def release_torrent(request, version):
    release = get_object_or_404(Release, version=version)
    if not release.torrent_data:
        raise Http404
    data = b64decode(release.torrent_data.encode('utf-8'))
    response = HttpResponse(data, content_type='application/x-bittorrent')
    # TODO: this is duplicated from Release.iso_url()
    filename = '%s-%s-dual.iso.torrent' % (settings.BRANDING_SLUG, release.version)
    response['Content-Disposition'] = 'attachment; filename=%s' % filename
    return response


class ReleaseJSONEncoder(DjangoJSONEncoder):
    release_attributes = ('release_date', 'version', 'kernel_version',
            'created', 'md5_sum', 'sha1_sum')

    def default(self, obj):
        if hasattr(obj, '__iter__'):
            # mainly for queryset serialization
            return list(obj)
        if isinstance(obj, Release):
            data = {attr: getattr(obj, attr) or None
                    for attr in self.release_attributes}
            data['available'] = obj.available
            data['iso_url'] = '/' + obj.iso_url()
            data['magnet_uri'] = obj.magnet_uri()
            data['torrent_url'] = reverse('releng-release-torrent', args=[obj.version])
            data['info'] = obj.info_html()
            torrent_data = obj.torrent()
            if torrent_data:
                torrent_data.pop('url_list', None)
            data['torrent'] = torrent_data
            return data
        return super(ReleaseJSONEncoder, self).default(obj)


def releases_json(request):
    releases = Release.objects.all()
    try:
        latest_version = Release.objects.filter(available=True).values_list(
                'version', flat=True).latest()
    except Release.DoesNotExist:
        latest_version = None

    data = {
        'version': 1,
        'releases': releases,
        'latest_version': latest_version,
    }
    to_json = json.dumps(data, ensure_ascii=False, cls=ReleaseJSONEncoder)
    response = HttpResponse(to_json, content_type='application/json')
    return response

# vim: set ts=4 sw=4 et: