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