def body_to_article(headline, byline, text, date, source, meta):
"""
Create an Article-object based on given parameters. It raises an
error (Medium.DoesNotExist) when the given source does not have
an entry in the database.
@param headline: headline of new Article-object
@type headline: str
@param byline: byline for new Article
@type byline: NoneType, str
@param text: text for new Article
@type text: str
@param date: date(time) for new Article
@type date: datetime.date, datetime.datetime
@param source: medium-label for new Article
@type source: str
@param meta: object containing all sorts of meta-information, most of
it suitable for metastring. However, some information
(author, length) will be extracted.
@type meta: dictionary
@return Article-object
"""
log.debug("Creating article object for {headline!r}".format(**locals()))
art = Article(headline=headline, byline=byline, text=text, date=date)
art.medium = Medium.get_or_create(source)
# Author / Section
meta = meta.copy()
art.author = meta.pop('author', None)
art.section = meta.pop('section', None)
if 'length' in meta:
art.length = int(meta.pop('length').split()[0])
else:
art.length = art.text.count(" ")
if 'url' in meta:
art.url = meta.pop('url')
art.url = re.sub("\s+", "", art.url)
art.metastring = str(meta)
return art
