floof/controllers/tag.py

   1 import logging
   2 import re
   3
   4 from pylons import request, response, session, tmpl_context as c, url
   5 from pylons.controllers.util import abort, redirect
   6
   7 import elixir
   8 from floof.model import Art, ArtUser, ArtUserType, Tag, TagText, User
   9 from floof.lib.base import BaseController, render
  10 from floof.lib.dbhelpers import find_or_create
  11 from floof.lib import helpers as h
  12
  13 log = logging.getLogger(__name__)
  14
  15 class TagController(BaseController):
  16
  17     # TODO: login required
  18     def delete(self, art_id, id):
  19         tag = h.get_object_or_404(Tag, id=id)
  20         elixir.session.delete(tag)
  21         elixir.session.commit()
  22         redirect(url('show_art', id=art_id))
  23
  24     # TODO: login required
  25     def create(self, art_id):
  26         c.art = h.get_object_or_404(Art, id=art_id)
  27
  28         tag_string = request.params.get('tags', '')
  29
  30         # Add or remove tags
  31         bad_tags = []
  32         for tag_text in tag_string.split():
  33             original_tag_text = tag_text
  34             tag_text = tag_text.lower()
  35
  36             # Adding or removing a tag?
  37             if tag_text[0] == '-':
  38                 add = False
  39                 tag_text = tag_text[1:]
  40             else:
  41                 # Allow "+foo" to mean "add foo"
  42                 if tag_text[0] == '+':
  43                     tag_text = tag_text[1:]
  44                 add = True
  45
  46             # Check for special namespaces
  47             prefix = None
  48             if ':' in tag_text:
  49                 prefix, tag_text = tag_text.split(':', 1)
  50                 if prefix not in ['by', 'for', 'of']:
  51                     # This is bogus.  Skip it.
  52                     bad_tags.append(original_tag_text)
  53                     continue
  54
  55                 if prefix == 'by':
  56                     # XXX this needs supporting.  silently ignore for now
  57                     continue
  58
  59             # Must be 3-50 alphanumeric characters
  60             if not re.match('^[a-z0-9]{3,50}$', tag_text):
  61                 bad_tags.append(original_tag_text)
  62                 continue
  63
  64             # Do work!
  65             if prefix:
  66                 target_user = User.get_by(name=tag_text)
  67
  68                 # Special tag; at the moment, just a relationship
  69                 if prefix == 'by':
  70                     rel = ArtUserType.BY
  71                 elif prefix == 'for':
  72                     rel = ArtUserType.FOR
  73                 elif prefix == 'of':
  74                     rel = ArtUserType.OF
  75
  76                 user_assoc_data = dict(art=c.art, user=target_user, type=rel)
  77                 if add:
  78                     find_or_create(ArtUser, **user_assoc_data)
  79
  80                 else:
  81                     # XXX this will die for nonassociations
  82                     user_assoc = ArtUser.get_by(art=c.art, **user_assoc_data)
  83                     user_assoc.delete()
  84
  85             else:
  86                 # Regular tag
  87                 if add:
  88                     tag = find_or_create(TagText, text=tag_text)
  89                     find_or_create(Tag, art=c.art, tagger=c.user, tagtext=tag)
  90
  91                 else:
  92                     tag = TagText.get_by(text=tag_text)
  93                     if tag:
  94                         # XXX this will die
  95                         tag_assoc = Tag.get_by(art=c.art, tagger=c.user, tagtext=tag)
  96                         tag_assoc.delete()
  97
  98         elixir.session.commit()
  99         redirect(url('show_art', id=c.art.id))