#
#  Copyright (c) 2006 Helmut Merz helmutm@cy55.de
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

"""
Common base class for loops browser view classes.

$Id$
"""

from zope.app import zapi
from zope.app.dublincore.interfaces import ICMFDublinCore
from zope.app.form.browser.interfaces import ITerms
from zope.cachedescriptors.property import Lazy
from zope.interface import implements
#from zope.schema.vocabulary import SimpleTerm
from zope.security.proxy import removeSecurityProxy

class BaseView(object):

    def __init__(self, context, request):
        self.context = context
        #self.context = removeSecurityProxy(context)
        self.request = request

    @Lazy
    def modified(self):
        """ get date/time of last modification
        """
        dc = ICMFDublinCore(self.context)
        d = dc.modified or dc.created
        return d and d.strftime('%Y-%m-%d %H:%M') or ''

    @Lazy
    def loopsRoot(self):
        return self.context.getLoopsRoot()
    
    @Lazy
    def url(self):
        return zapi.absoluteURL(self.context, self.request)

    @Lazy
    def token(self):
        return self.loopsRoot.getLoopsUri(self.context)

    @Lazy
    def title(self):
        return self.context.title or zapi.getName(self.context)

    @Lazy
    def value(self):
        return self.context


class LoopsTerms(object):
    """ Provide the ITerms interface, e.g. for usage in selection
        lists.
    """

    implements(ITerms)

    def __init__(self, source, request):
        # the source parameter is a view or adapter of a real context object:
        self.source = source
        self.context = source.context
        self.request = request

    @Lazy
    def loopsRoot(self):
        return self.context.getLoopsRoot()
    
    def getTerm(self, value):
        return BaseView(value, self.request)
        #token = self.loopsRoot.getLoopsUri(value)
        #title = value.title or zapi.getName(value)
        #return SimpleTerm(value, token, title)

    def getValue(self, token):
        return self.loopsRoot.loopsTraverse(token)