pelican-theme/pelican/plugins/gravatar.py

import hashlib

from pelican import signals
"""
Gravatar plugin for Pelican
===========================

Simply add author_gravatar variable in article's context, which contains
the gravatar url.

Settings:
---------

Add AUTHOR_EMAIL to your settings file to define default author email.

Article metadata:
------------------

:email:  article's author email

If one of them are defined, the author_gravatar variable is added to
article's context.
"""

def add_gravatar(generator, metadata):

    #first check email
    if 'email' not in metadata.keys()\
        and 'AUTHOR_EMAIL' in generator.settings.keys():
            metadata['email'] = generator.settings['AUTHOR_EMAIL']

    #then add gravatar url
    if 'email' in metadata.keys():
        gravatar_url = "http://www.gravatar.com/avatar/" + \
                        hashlib.md5(metadata['email'].lower()).hexdigest()
        metadata["author_gravatar"] = gravatar_url


def register():
    signals.article_generate_context.connect(add_gravatar)