view MoinMoin/apps/feed/ @ 1973:286e315935ae

refactor usage of constants don't import from config module, but from constants.* use uppercase for constant names
author Thomas Waldmann <tw AT waldmann-edv DOT de>
date Sun, 10 Feb 2013 22:50:21 +0100
parents ff503e7ea7a0
children 87272c032485
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# Copyright: 2010 MoinMoin:ThomasWaldmann
# Copyright: 2010 MoinMoin:DiogenesAugusto
# License: GNU GPL v2 (or any later version), see LICENSE.txt for details.

    MoinMoin - feed views

    This contains all sort of feeds.

from datetime import datetime

from flask import request, Response
from flask import current_app as app
from flask import g as flaskg
from flask import url_for

from werkzeug.contrib.atom import AtomFeed
from jinja2 import Markup

from whoosh.query import Term, And

from MoinMoin import log
logging = log.getLogger(__name__)

from MoinMoin.i18n import _, L_, N_
from MoinMoin.apps.feed import feed
from MoinMoin.themes import get_editor_info, render_template
from MoinMoin.items import Item
from MoinMoin.util.crypto import cache_key
from MoinMoin.util.interwiki import url_for_item

@feed.route('/atom', defaults=dict(item_name=''))
def atom(item_name):
    # Currently atom feeds behave in the fol. way
    # - Text diffs are shown in a side-by-side fashion
    # - The current binary item is fully rendered in the feed
    # - Image(binary)'s diff is shown using PIL
    # - First item is always rendered fully
    # - Revision meta(id, size and comment) is shown for parent and current revision
    query = Term(WIKINAME, app.cfg.interwikiname)
    if item_name:
        query = And([query, Term(NAME_EXACT, item_name), ])
    revs = list(, idx_name=LATEST_REVS, sortedby=[MTIME], reverse=True, limit=1))
    if revs:
        rev = revs[0]
        cid = cache_key(usage="atom", revid=rev.revid, item_name=item_name)
        content = app.cache.get(cid)
        content = None
        cid = None
    if content is None:
        if not item_name:
            title = u"{0}".format(app.cfg.sitename)
            title = u"{0} - {1}".format(app.cfg.sitename, item_name)
        feed = AtomFeed(title=title, feed_url=request.url, url=request.host_url)
        query = Term(WIKINAME, app.cfg.interwikiname)
        if item_name:
            query = And([query, Term(NAME_EXACT, item_name), ])
        history =, idx_name=ALL_REVS, sortedby=[MTIME], reverse=True, limit=100)
        for rev in history:
            name =
            item = rev.item
            this_revid = rev.meta[REVID]
            previous_revid = rev.meta.get(PARENTID)
            this_rev = rev
                hl_item = Item.create(name, rev_id=this_revid)
                if previous_revid is not None:
                    # HTML diff for subsequent revisions
                    previous_rev = item[previous_revid]
                    content = hl_item.content._render_data_diff_atom(previous_rev, this_rev)
                    # full html rendering for new items
                    content = render_template('atom.html', get='first_revision', rev=this_rev, content=Markup(hl_item.content._render_data()), revision=this_revid)
                content_type = 'html'
            except Exception as e:
                logging.exception("content rendering crashed")
                content = _(u'MoinMoin feels unhappy.')
                content_type = 'text'
            author = get_editor_info(rev.meta, external=True)
            rev_comment = rev.meta.get(COMMENT, '')
            if rev_comment:
                # Trim down extremely long revision comment
                if len(rev_comment) > 80:
                    content = render_template('atom.html', get='comment_cont_merge', comment=rev_comment[79:], content=Markup(content))
                    rev_comment = u"{0}...".format(rev_comment[:79])
                feed_title = u"{0} - {1}".format(author.get(NAME, ''), rev_comment)
                feed_title = u"{0}".format(author.get(NAME, ''))
            if not item_name:
                feed_title = u"{0} - {1}".format(name, feed_title)
            feed.add(title=feed_title, title_type='text',
                     summary=content, summary_type=content_type,
                     url=url_for_item(name, rev=this_revid, _external=True),
        content = feed.to_string()
        # Hack to add XSLT stylesheet declaration since AtomFeed doesn't allow this
        content = content.split("\n")
        content.insert(1, render_template('atom.html', get='xml'))
        content = "\n".join(content)
        if cid is not None:
            app.cache.set(cid, content)
    return Response(content, content_type='application/atom+xml')