# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr

#

# This file is part of CubicWeb.

#

# CubicWeb is free software: you can redistribute it and/or modify it under the

# terms of the GNU Lesser General Public License as published by the Free

# Software Foundation, either version 2.1 of the License, or (at your option)

# any later version.

#

# CubicWeb 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 Lesser General Public License for more

# details.

#

# You should have received a copy of the GNU Lesser General Public License along

# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.

"""Specific views for SIOC (Semantically-Interlinked Online Communities)

http://sioc-project.org

"""

__docformat__ = "restructuredtext en"

from logilab.mtconverter import xml_escape

from cubicweb.view import EntityView, EntityAdapter, implements_adapter_compat

from cubicweb.selectors import implements, adaptable

from cubicweb.interfaces import ISiocItem, ISiocContainer

class ISIOCItemAdapter(EntityAdapter):

    """interface for entities which may be represented as an ISIOC items"""

    __regid__ = 'ISIOCItem'

    __select__ = implements(ISiocItem) # XXX for bw compat, should be abstract

    @implements_adapter_compat('ISIOCItem')

    def isioc_content(self):

        """return item's content"""

        raise NotImplementedError

    @implements_adapter_compat('ISIOCItem')

    def isioc_container(self):

        """return container entity"""

        raise NotImplementedError

    @implements_adapter_compat('ISIOCItem')

    def isioc_type(self):

        """return container type (post, BlogPost, MailMessage)"""

        raise NotImplementedError

    @implements_adapter_compat('ISIOCItem')

    def isioc_replies(self):

        """return replies items"""

        raise NotImplementedError

    @implements_adapter_compat('ISIOCItem')

    def isioc_topics(self):

        """return topics items"""

        raise NotImplementedError

class ISIOCContainerAdapter(EntityAdapter):

    """interface for entities which may be represented as an ISIOC container"""

    __regid__ = 'ISIOCContainer'

    __select__ = implements(ISiocContainer) # XXX for bw compat, should be abstract

    @implements_adapter_compat('ISIOCContainer')

    def isioc_type(self):

        """return container type (forum, Weblog, MailingList)"""

        raise NotImplementedError

    @implements_adapter_compat('ISIOCContainer')

    def isioc_items(self):

        """return contained items"""

        raise NotImplementedError

class SIOCView(EntityView):

    __regid__ = 'sioc'

    __select__ = adaptable('ISIOCItem', 'ISIOCContainer')

    title = _('sioc')

    templatable = False

    content_type = 'text/xml'

    def call(self):

        self.w(u'<?xml version="1.0" encoding="%s"?>\n' % self._cw.encoding)

        self.w(u'''<rdf:RDF

             xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"

             xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"

             xmlns:owl="http://www.w3.org/2002/07/owl#"

             xmlns:foaf="http://xmlns.com/foaf/0.1/"

             xmlns:sioc="http://rdfs.org/sioc/ns#"

             xmlns:sioctype="http://rdfs.org/sioc/types#"

             xmlns:dcterms="http://purl.org/dc/terms/">\n''')

        for i in xrange(self.cw_rset.rowcount):

            self.cell_call(i, 0)

        self.w(u'</rdf:RDF>\n')

    def cell_call(self, row, col):

        self.wview('sioc_element', self.cw_rset, row=row, col=col)

class SIOCContainerView(EntityView):

    __regid__ = 'sioc_element'

    __select__ = adaptable('ISIOCContainer')

    templatable = False

    content_type = 'text/xml'

    def cell_call(self, row, col):

        entity = self.cw_rset.complete_entity(row, col)

        isioc = entity.cw_adapt_to('ISIOCContainer')

        isioct = isioc.isioc_type()

        self.w(u'<sioc:%s rdf:about="%s">\n'

               % (isioct, xml_escape(entity.absolute_url())))

        self.w(u'<dcterms:title>%s</dcterms:title>'

               % xml_escape(entity.dc_title()))

        self.w(u'<dcterms:created>%s</dcterms:created>'

               % entity.creation_date) # XXX format

        self.w(u'<dcterms:modified>%s</dcterms:modified>'

               % entity.modification_date) # XXX format

        self.w(u'<!-- FIXME : here be items -->')#entity.isioc_items()

        self.w(u'</sioc:%s>\n' % isioct)

class SIOCItemView(EntityView):

    __regid__ = 'sioc_element'

    __select__ = adaptable('ISIOCItem')

    templatable = False

    content_type = 'text/xml'

    def cell_call(self, row, col):

        entity = self.cw_rset.complete_entity(row, col)

        isioc = entity.cw_adapt_to('ISIOCItem')

        isioct = isioc.isioc_type()

        self.w(u'<sioc:%s rdf:about="%s">\n'

               % (isioct, xml_escape(entity.absolute_url())))

        self.w(u'<dcterms:title>%s</dcterms:title>'

               % xml_escape(entity.dc_title()))

        self.w(u'<dcterms:created>%s</dcterms:created>'

               % entity.creation_date) # XXX format

        self.w(u'<dcterms:modified>%s</dcterms:modified>'

               % entity.modification_date) # XXX format

        content = isioc.isioc_content()

        if content:

            self.w(u'<sioc:content>%s</sioc:content>' % xml_escape(content))

        container = isioc.isioc_container()

        if container:

            self.w(u'<sioc:has_container rdf:resource="%s"/>\n'

                   % xml_escape(container.absolute_url()))

        if entity.creator:

            self.w(u'<sioc:has_creator>\n')

            self.w(u'<sioc:User rdf:about="%s">\n'

                   % xml_escape(entity.creator.absolute_url()))

            self.w(entity.creator.view('foaf'))

            self.w(u'</sioc:User>\n')

            self.w(u'</sioc:has_creator>\n')

        self.w(u'<!-- FIXME : here be topics -->')#entity.isioc_topics()

        self.w(u'<!-- FIXME : here be replies -->')#entity.isioc_replies()

        self.w(u' </sioc:%s>\n' % isioct)