tag clouds

[Caleb Davis]

This is another rollover from `#360 </issues/360>`_, but it got
left behind somehow. A tag cloud is a dict-like object containing
{'tag-name':frequency-of-use,...}. It's fun to have them to see all
the tags that people are using publicly on an instance.

Where would we display these?


-  instance home page - all users, processed media
-  user's profile - user's processed media
-  [BONUS] - arbitrary collection (/tags/bunnies) Open questions:
-  Should we use MapReduce?
   `http://cookbook.mongodb.org/patterns/count\_tags/ <http://cookbook.mongodb.org/patterns/count_tags/>`_
   The alternative would be to write tags to a text file and do

   sort tags\_text\_file \| uniq -c


or do it completely within python \* Should we use celery?
Generating tag clouds shouldn't slow page renders. Thoughts:

    do it with python if you're using MapReduce since, if MapReduce
    gets too slow, you just add more processors!


    if it 'takes too long', then use celery



-  How often do we update the clouds? Thoughts included:

    not during a bulk upload



-  How do we store these tag cloud objects? If we're not rendering
   them on the fly, then they should be in some kind of cache.
   Thoughts:

    user['tag\_cloud'] = dict


    associate the cloud with the route. something like -
    {'/':'instance\_cloud.txt','/u/user1':'user1\_cloud.txt','/tags/bunnies':'tags\_bunnies.txt'}

[Caleb Davis]

I haven't gone through the code in this one yet, but the feature
set is interesting:
`http://pypi.python.org/pypi/cs.tags <http://pypi.python.org/pypi/cs.tags>`_

[Christopher Allan Webber]

Rolling over to 0.1.0 but doubtful we'll get it done in that
release :)

[Jakob Kramer]

I think the best approach is to use Map/Reduce, it seems to be
implementable very simple. At the beginning I had problems to
understand how Map/Reduce works, but it is clear to me now. The tag
clouds are already "finished", but I have to do some Celery task,
so the tag clouds don't slow everything up.

[Jakob Kramer]

As you may have noticed, I am very inactive in the last time again.
I pushed my current work to my fork, so you may review it and
change it to a better. It is very slow at the moment!

[https://gitorious.org/\ :sub:`gandaro/mediagoblin/gandaros-mediagoblin/commits/tag-clouds](https://gitorious.org/`\ gandaro/mediagoblin/gandaros-mediagoblin/commits/tag-clouds)

[Will Kahn-Greene]

The original url for this bug was ​http://bugs.foocorp.net/issues/476 .
Relations:
#212: related, #207: related, #164: blocked

[Elrond]

I don't think this one is top priority for the next release.
If someone wants to take it over, that's fine of course!

[Christopher Allan Webber]

It probably makes sense that this can wait to be a plugin, once we have plugins? I'm not sure, though.

One easy thing now that we have SQL would be to show unique tags from recent images. That wouldn't have to do anything smart about generating a cloud, and would be fast.