# Path: shrubbery/tagging/encoding.py
# def parse_tags(tag_input):
#     buf = []
#     quoted = False
#     i = iter(tag_input)
#     def _current():
#         return "".join(buf).strip()
#     try:
#         while True:
#             c = i.next()
#             if c == TAG_QUOTE_CHAR:
#                 if quoted:
#                     tag = _current()                    
#                     if tag:
#                         yield tag
#                     buf = []
#                     quoted = False
#                 else:
#                     quoted = True
#             elif c == TAG_SEPARATOR:
#                 if quoted:
#                     buf.append(c)
#                 else:
#                     tag = _current()
#                     if tag:
#                         yield tag
#                     buf = []
#             elif c == TAG_ESCAPE_CHAR:
#                 if quoted:
#                     c = i.next()
#                     if not c in (TAG_ESCAPE_CHAR, TAG_QUOTE_CHAR):
#                         raise ValueError("illegal escape sequence")
#                 buf.append(c)
#             else:
#                 buf.append(c)                
#     except StopIteration:
#         if quoted:
#             raise ValueError("quotes mismatch")
#         tag = _current()
#         if tag:
#             yield tag
# 
# def encode_tags(tags):
#     return (TAG_SEPARATOR + " ").join([quote_tag(unicode(tag)) for tag in tags])
# 
# Path: shrubbery/tagging/models.py
# def get_tags(tags, create=False, str_pk=False):
#     if isinstance(tags, (str, unicode)):
#         tags = parse_tags(tags)    
#     tag_set = set()
#     names = set()    
#     tag_lookups = set()
#     for tag in tags:
#         if isinstance(tag, Tag):
#             tag_set.add(tag)
#             if create and not tag.pk:
#                 tag.save()
#         elif isinstance(tag, basestring):
#             try:
#                 tag_lookups.add(models.Q(pk=int(tag)))
#             except ValueError:
#                 if create:
#                     names.add(tag)
#                 tag_lookups.add(models.Q(name=tag))
#         elif isinstance(tag, (int, long)):
#             tag_lookups.add(models.Q(pk=tag))
#     if tag_lookups:
#         for tag in Tag.objects.filter(reduce_or(tag_lookups)):
#             tag_set.add(tag)
#         for name in names.difference(tag.name for tag in tag_set):
#             tag_set.add(Tag.objects.create(name=name))            
#     return tag_set


from django import forms
from shrubbery.tagging.encoding import parse_tags, encode_tags
from shrubbery.tagging.models import get_tags

class TagWidget(forms.TextInput):
    def render(self, name, value, attrs=None, choices=()):
        value_list = encode_tags(value or ())
        return super(TagWidget, self).render(name, value_list, attrs=attrs)


class TagField(forms.CharField):
    def __init__(self, *args, **kwargs):
        kwargs.setdefault('widget', TagWidget())
        kwargs.setdefault('required', False)
        super(TagField, self).__init__(*args, **kwargs)

    def clean(self, value):
        value = super(TagField, self).clean(value)
        tag_names = list(parse_tags(value))
        return get_tags(tag_names, create=True)
        
    def prepare_value(self, value):

# Path: shrubbery/tagging/encoding.py
# def parse_tags(tag_input):
#     buf = []
#     quoted = False
#     i = iter(tag_input)
#     def _current():
#         return "".join(buf).strip()
#     try:
#         while True:
#             c = i.next()
#             if c == TAG_QUOTE_CHAR:
#                 if quoted:
#                     tag = _current()                    
#                     if tag:
#                         yield tag
#                     buf = []
#                     quoted = False
#                 else:
#                     quoted = True
#             elif c == TAG_SEPARATOR:
#                 if quoted:
#                     buf.append(c)
#                 else:
#                     tag = _current()
#                     if tag:
#                         yield tag
#                     buf = []
#             elif c == TAG_ESCAPE_CHAR:
#                 if quoted:
#                     c = i.next()
#                     if not c in (TAG_ESCAPE_CHAR, TAG_QUOTE_CHAR):
#                         raise ValueError("illegal escape sequence")
#                 buf.append(c)
#             else:
#                 buf.append(c)                
#     except StopIteration:
#         if quoted:
#             raise ValueError("quotes mismatch")
#         tag = _current()
#         if tag:
#             yield tag
# 
# def encode_tags(tags):
#     return (TAG_SEPARATOR + " ").join([quote_tag(unicode(tag)) for tag in tags])
# 
# Path: shrubbery/tagging/models.py
# def get_tags(tags, create=False, str_pk=False):
#     if isinstance(tags, (str, unicode)):
#         tags = parse_tags(tags)    
#     tag_set = set()
#     names = set()    
#     tag_lookups = set()
#     for tag in tags:
#         if isinstance(tag, Tag):
#             tag_set.add(tag)
#             if create and not tag.pk:
#                 tag.save()
#         elif isinstance(tag, basestring):
#             try:
#                 tag_lookups.add(models.Q(pk=int(tag)))
#             except ValueError:
#                 if create:
#                     names.add(tag)
#                 tag_lookups.add(models.Q(name=tag))
#         elif isinstance(tag, (int, long)):
#             tag_lookups.add(models.Q(pk=tag))
#     if tag_lookups:
#         for tag in Tag.objects.filter(reduce_or(tag_lookups)):
#             tag_set.add(tag)
#         for name in names.difference(tag.name for tag in tag_set):
#             tag_set.add(Tag.objects.create(name=name))            
#     return tag_set


# Path: shrubbery/tagging/forms.py
from django import forms
from shrubbery.tagging.encoding import parse_tags, encode_tags
from shrubbery.tagging.models import get_tags


class TagWidget(forms.TextInput):
    def render(self, name, value, attrs=None, choices=()):
        value_list = encode_tags(value or ())
        return super(TagWidget, self).render(name, value_list, attrs=attrs)


class TagField(forms.CharField):
    def __init__(self, *args, **kwargs):
        kwargs.setdefault('widget', TagWidget())
        kwargs.setdefault('required', False)
        super(TagField, self).__init__(*args, **kwargs)

    def clean(self, value):
        value = super(TagField, self).clean(value)
        tag_names = list(parse_tags(value))
        return get_tags(tag_names, create=True)
        
    def prepare_value(self, value):

        return get_tags(value or ())