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"""A set of basic callbacks for bleach.linkify."""
from __future__ import unicode_literals
def nofollow(attrs, new=False):
href_key = (None, u'href')
if href_key not in attrs:
return attrs
if attrs[href_key].startswith(u'mailto:'):
return attrs
rel_key = (None, u'rel')
rel_values = [val for val in attrs.get(rel_key, u'').split(u' ') if val]
if u'nofollow' not in [rel_val.lower() for rel_val in rel_values]:
rel_values.append(u'nofollow')
attrs[rel_key] = u' '.join(rel_values)
return attrs
def target_blank(attrs, new=False):
href_key = (None, u'href')
if href_key not in attrs:
return attrs
if attrs[href_key].startswith(u'mailto:'):
return attrs
attrs[(None, u'target')] = u'_blank'
return attrs
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