126 lines
3.6 KiB
Python
126 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright(C) 2010 Christophe Benz
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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__all__ = ['BaseItem', 'FieldException', 'FieldsItem', 'ItemGroup', 'ObjectItem']
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class FieldException(Exception):
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def __init__(self, name):
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Exception.__init__(self, 'Field "%s" does not exist.' % name)
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class ItemGroup(object):
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def __init__(self, name=u'', header=None):
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self.name = name
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self._groups = []
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self._items = []
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self.header = header
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def add_item(self, item):
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self._items.append(item)
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def add_items(self, items):
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self._items.extend(items)
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def iter_items(self):
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return iter(self._items)
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def deep_iter_items(self):
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for i in self._items:
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yield i
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for g in self._groups:
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for i in g.iter_items():
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yield i
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def add_group(self, group):
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self._groups.append(group)
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def get_group(self, name):
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l = [group for group in self._groups if group.name == name]
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if l:
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return l[0]
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else:
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return None
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def get_or_create_group(self, name, group_class=None):
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if group_class is None:
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group_class = ItemGroup
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group = self.get_group(name)
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if group:
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return group
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else:
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new_group = group_class(name)
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self.add_group(new_group)
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return new_group
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def iter_groups(self):
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return iter(self._groups)
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def format(self, select=[]):
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formatted = u''
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if select:
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formatted += u'\n'.join(item.format(select) for item in self.deep_iter_items())
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else:
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if self.header:
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formatted += '%s\n' % self.header
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formatted += u'\n'.join(item.format() for item in self.iter_items())
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formatted += u'\n\n'.join(group.format() for group in self.iter_groups())
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return formatted
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class BaseItem(object):
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def get(self, name):
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raise NotImplementedError()
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def format(self, select=[]):
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raise NotImplementedError()
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class FieldsItem(BaseItem):
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def __init__(self, fields=[]):
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self._fields = fields
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def add_field(self, *args, **kwargs):
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if args:
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name, value = args
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elif kwargs:
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name, value = kwargs.items()[0]
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self._fields.append((name, value))
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def get(self, name):
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try:
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return [value for _name, value in self._fields if name.lower() == _name.lower()][0]
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except IndexError:
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raise FieldException(name)
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def format(self, select=[]):
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if select:
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return [value for name, value in self._fields if name in select]
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else:
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return u'; '.join(u'%s: %s' % (name, value) for name, value in self._fields)
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class ObjectItem(BaseItem):
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def __init__(self, obj):
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self.obj = obj
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def get(self, name):
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try:
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return getattr(self.obj, name)
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except AttributeError:
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raise FieldException(name)
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