summaryrefslogtreecommitdiffstats
path: root/feeds.py
blob: 49e0bc6ee5905d2745ae260055483a3712d735f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
import hashlib

from django.contrib.sites.models import Site
from django.contrib.syndication.views import Feed
from django.db.models import Q
from django.utils.feedgenerator import Rss201rev2Feed
from django.views.decorators.http import condition

from main.utils import retrieve_latest
from main.models import Arch, Repo, Package
from news.models import News


class GuidNotPermalinkFeed(Rss201rev2Feed):
    @staticmethod
    def check_for_unique_id(f):
        def wrapper(name, contents=None, attrs=None):
            if attrs is None:
                attrs = {}
            if name == 'guid':
                attrs['isPermaLink'] = 'false'
            return f(name, contents, attrs)
        return wrapper

    def write_items(self, handler):
        # Totally disgusting. Monkey-patch the hander so if it sees a
        # 'unique-id' field come through, add an isPermalink="false" attribute.
        # Workaround for http://code.djangoproject.com/ticket/9800
        handler.addQuickElement = self.check_for_unique_id(
                handler.addQuickElement)
        super(GuidNotPermalinkFeed, self).write_items(handler)


def package_etag(request, *args, **kwargs):
    latest = retrieve_latest(Package)
    if latest:
        return hashlib.md5(str(kwargs) + str(latest)).hexdigest()
    return None

def package_last_modified(request, *args, **kwargs):
    return retrieve_latest(Package)


class PackageFeed(Feed):
    feed_type = GuidNotPermalinkFeed

    link = '/packages/'
    title_template = 'feeds/packages_title.html'
    description_template = 'feeds/packages_description.html'

    def __call__(self, request, *args, **kwargs):
        wrapper = condition(etag_func=package_etag, last_modified_func=package_last_modified)
        return wrapper(super(PackageFeed, self).__call__)(request, *args, **kwargs)

    def get_object(self, request, arch='', repo=''):
        obj = dict()
        qs = Package.objects.normal().order_by('-last_update')

        if arch != '':
            # feed for a single arch, also include 'any' packages everywhere
            a = Arch.objects.get(name=arch)
            qs = qs.filter(Q(arch=a) | Q(arch__agnostic=True))
            obj['arch'] = a
        if repo != '':
            # feed for a single arch AND repo
            r = Repo.objects.get(name__iexact=repo)
            qs = qs.filter(repo=r)
            obj['repo'] = r
        else:
            qs = qs.filter(repo__staging=False)
        obj['qs'] = qs[:50]
        return obj

    def title(self, obj):
        s = 'Arch Linux: Recent package updates'
        if 'repo' in obj and 'arch' in obj:
            s += ' (%s [%s])' % (obj['arch'].name, obj['repo'].name.lower())
        elif 'repo' in obj:
            s += ' [%s]' % (obj['repo'].name.lower())
        elif 'arch' in obj:
            s += ' (%s)' % (obj['arch'].name)
        return s

    def description(self, obj):
        s = 'Recently updated packages in the Arch Linux package repositories'
        if 'arch' in obj:
            s += ' for the \'%s\' architecture' % obj['arch'].name.lower()
            if not obj['arch'].agnostic:
                s += ' (including \'any\' packages)'
        if 'repo' in obj:
            s += ' in the [%s] repository' % obj['repo'].name.lower()
        s += '.'
        return s

    subtitle = description

    def items(self, obj):
        return obj['qs']

    def item_guid(self, item):
        # http://diveintomark.org/archives/2004/05/28/howto-atom-id
        date = item.last_update
        return 'tag:%s,%s:%s%s' % (Site.objects.get_current().domain,
                date.strftime('%Y-%m-%d'), item.get_absolute_url(),
                date.strftime('%Y%m%d%H%M'))

    def item_pubdate(self, item):
        return item.last_update

    def item_categories(self, item):
        return (item.repo.name, item.arch.name)


def news_etag(request, *args, **kwargs):
    latest = retrieve_latest(News, 'last_modified')
    if latest:
        return hashlib.md5(str(latest)).hexdigest()
    return None

def news_last_modified(request, *args, **kwargs):
    return retrieve_latest(News, 'last_modified')


class NewsFeed(Feed):
    feed_type = GuidNotPermalinkFeed

    title = 'Arch Linux: Recent news updates'
    link = '/news/'
    description = 'The latest and greatest news from the Arch Linux distribution.'
    subtitle = description
    title_template = 'feeds/news_title.html'
    description_template = 'feeds/news_description.html'

    def __call__(self, request, *args, **kwargs):
        wrapper = condition(etag_func=news_etag, last_modified_func=news_last_modified)
        return wrapper(super(NewsFeed, self).__call__)(request, *args, **kwargs)

    def items(self):
        return News.objects.select_related('author').order_by(
                '-postdate', '-id')[:10]

    def item_guid(self, item):
        return item.guid

    def item_pubdate(self, item):
        return item.postdate

    def item_author_name(self, item):
        return item.author.get_full_name()

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