add quoting support to tagging

[Caleb Davis]

Tagging (`#360 </issues/360>`_) needs to be iterated on. This
ticket addresses support for quoting. What are the expected
behaviors? In the following examples, user input is underlined, and
resulting tags are indented.


-  In the simple case (assuming comma-delimited text), the user has
   a single pair of quotes embedded within the input, such as:
   meta,'yo dawg, I heard you like delimiters...',humor

    u'meta'


    u'yo dawg, I heard you like delimiters...'


    u'humor'



-  what about mixed quotes? (eg user wants *you're* in the tag)
   meme,"I don't even...",humor

    u'meme'


    u'I don't even'


    u'humor'



-  then, as Will noted in IRC, some users may wish to tag using xml
   or hierarchical organization schemes. At what point does supporting
   quoting become complex enough to warrant using a plugin?

**tl;dr - introduce support for tag delimiter(s) within a tag. Efforts towards native gmg support go here. Add a new ticket for plugin work**

Feel fix this ticket if I'm missing the point or the point is not
clear.

[Caleb Davis]

oops, \*"Feel fix this..." = "Feel *free to* fix this..."

[Aaron Williamson]

Updated convert\_to\_tag\_list\_of\_dicts to use shlex to parse tag
strings. Now a tag with quotes around it will be treated as one
tag, even if it contains commas. Branch:
[https://gitorious.org/\ :sub:`copiesofcopies/mediagoblin/copiesofcopies-mediagoblin/commits/feature454\_quoted\_tags](https://gitorious.org/`\ copiesofcopies/mediagoblin/copiesofcopies-mediagoblin/commits/feature454\_quoted\_tags)

[Aaron Williamson]

Also: this patch supports single quotes/apostrophes in tags wrapped
in double-quotes, but I'm not sure how to write the test for this.

[Elrond]

Already looks quite good!

I think ``media_tags_as_string()`` does not yet handle this
properly. This especially affects the "edit media" page.

[Will Kahn-Greene]

The original url for this bug was ​http://bugs.foocorp.net/issues/454 .
Relations:
#75: blocked

[Christopher Allan Webber]

This ticket hasn't been worked on for some while so I'm removing the claim!