"""Set of HTML base actions

:organization: Logilab

:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

"""

__docformat__ = "restructuredtext en"

from cubicweb.selectors import (

    yes, one_line_rset, two_lines_rset, one_etype_rset, relation_possible,

    non_final_entity,

    authenticated_user, match_user_groups, match_search_state,

    has_editable_relation, has_permission, has_add_permission,

    )

from cubicweb.web.action import Action

from cubicweb.web.views import linksearch_select_url

from cubicweb.web.views.baseviews import vid_from_rset

_ = unicode

def match_searched_etype(cls, req, rset, row=None, col=None, **kwargs):

    return req.match_search_state(rset)

def view_is_not_default_view(cls, req, rset, row, col, **kwargs):

    # interesting if it propose another view than the current one

    vid = req.form.get('vid')

    if vid and vid != vid_from_rset(req, rset, cls.schema):

        return 1

    return 0

def addable_etype_empty_rset(cls, req, rset, **kwargs):

    if rset is not None and not rset.rowcount:

        rqlst = rset.syntax_tree()

        if len(rqlst.children) > 1:

            return 0

        select = rqlst.children[0]

        if len(select.defined_vars) == 1 and len(select.solutions) == 1:

            rset._searched_etype = select.solutions[0].itervalues().next()

            eschema = cls.schema.eschema(rset._searched_etype)

            if not (eschema.is_final() or eschema.is_subobject(strict=True)) \

                   and eschema.has_perm(req, 'add'):

                return 1

    return 0

# generic primary actions #####################################################

class SelectAction(Action):

    """base class for link search actions. By default apply on

    any size entity result search it the current state is 'linksearch'

    if accept match.

    """

    id = 'select'

    __select__ = match_search_state('linksearch') & match_searched_etype()

    title = _('select')

    category = 'mainactions'    

    order = 0

    def url(self):

        return linksearch_select_url(self.req, self.rset)

class CancelSelectAction(Action):

    id = 'cancel'

    __select__ = match_search_state('linksearch')

    title = _('cancel select')

    category = 'mainactions'

    order = 10

    def url(self):

        target, eid, r_type, searched_type = self.req.search_state[1]

        return self.build_url(str(eid),

                              vid='edition', __mode='normal')

class ViewAction(Action):

    id = 'view'

    __select__ = (match_search_state('normal') &

                  match_user_groups('users', 'managers') &

                  view_is_not_default_view() & 

                  non_final_entity())

    title = _('view')

    category = 'mainactions'    

    order = 0

    def url(self):

        params = self.req.form.copy()

        params.pop('vid', None)

        params.pop('__message', None)

        return self.build_url(self.req.relative_path(includeparams=False),

                              **params)

class ModifyAction(Action):

    id = 'edit'

    __select__ = (match_search_state('normal') &

                  one_line_rset() & 

                  (has_permission('update') | has_editable_relation('add')))

    title = _('modify')

    category = 'mainactions'

    order = 10

    def url(self):

        entity = self.rset.get_entity(self.row or 0, self.col or 0)

        return entity.absolute_url(vid='edition')

class MultipleEditAction(Action):

    id = 'muledit' # XXX get strange conflicts if id='edit'

    __select__ = (match_search_state('normal') &

                     two_lines_rset(), one_etype_rset() &

                  has_permission('update'))

    title = _('modify')

    category = 'mainactions'

    order = 10

    def url(self):

        return self.build_url('view', rql=self.rset.rql, vid='muledit')

# generic secondary actions ###################################################

class ManagePermissionsAction(Action):

    id = 'addpermission'

    __select__ = match_user_groups('managers') 

    title = _('manage permissions')

    category = 'moreactions'

    order = 100

    @classmethod

    def registered(cls, vreg):

        super(ManagePermissionsAction, cls).registered(vreg)

        if 'require_permission' in vreg.schema:

            cls.__select__ |= relation_possible('require_permission', 'subject', 'EPermission',

                                                action='add')

        return super(ManagePermissionsAction, cls).registered(vreg)

    def url(self):

        return self.rset.get_entity(0, 0).absolute_url(vid='security')

class DeleteAction(Action):

    id = 'delete'

    __select__ = one_line_rset() & has_permission('delete')

    title = _('delete')

    category = 'moreactions' 

    order = 20

    def url(self):

        if len(self.rset) == 1:

            entity = self.rset.get_entity(0, 0)

            return self.build_url(entity.rest_path(), vid='deleteconf')

        return self.build_url(rql=self.rset.printable_rql(), vid='deleteconf')

class CopyAction(Action):

    id = 'copy'

    __select__ = one_line_rset() & has_permission('add')

    title = _('copy')

    category = 'moreactions'

    order = 30

    def url(self):

        entity = self.rset.get_entity(self.row or 0, self.col or 0)

        return entity.absolute_url(vid='copy')

class AddNewAction(MultipleEditAction):

    """when we're seeing more than one entity with the same type, propose to

    add a new one

    """

    id = 'addentity'

    __select__ = (match_search_state('normal') &

                  (addable_etype_empty_rset()

                  )

    category = 'moreactions'

    order = 40

    @property

    def rsettype(self):

        if self.rset:

            return self.rset.description[0][0]

        return self.rset._searched_etype

    @property

    def title(self):

        return self.req.__('add a %s' % self.rsettype) # generated msgid

    def url(self):

        return self.build_url('add/%s' % self.rsettype)

# logged user actions #########################################################

class UserPreferencesAction(Action):

    id = 'myprefs'

    __select__ = authenticated_user()

    title = _('user preferences')

    category = 'useractions'

    order = 10

    def url(self):

        return self.build_url(self.id)

class UserInfoAction(Action):

    id = 'myinfos'

    __select__ = authenticated_user()

    title = _('personnal informations')

    category = 'useractions'

    order = 20

    def url(self):

        return self.build_url('euser/%s'%self.req.user.login, vid='edition')

class LogoutAction(Action):

    id = 'logout'

    __select__ = authenticated_user()

    title = _('logout')

    category = 'useractions'

    order = 30

    def url(self):

        return self.build_url(self.id)

# site actions ################################################################

class ManagersAction(Action):

    __abstract__ = True

    __select__ = match_user_groups('managers')

    category = 'siteactions'

    def url(self):

        return self.build_url(self.id)

class SiteConfigurationAction(ManagersAction):

    id = 'siteconfig'

    title = _('site configuration')

    order = 10

class ManageAction(ManagersAction):

    id = 'manage'

    title = _('manage')

    order = 20

class ViewSchemaAction(Action):

    id = 'schema'

    __select__ = yes()

    title = _("site schema")

    category = 'siteactions'

    order = 30

    def url(self):

        return self.build_url(self.id)