"""Set of HTML base actions

:organization: Logilab

:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.

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

:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses

"""

__docformat__ = "restructuredtext en"

_ = unicode

from cubicweb.appobject import objectify_selector

from cubicweb.selectors import (EntitySelector, yes,

    one_line_rset, two_lines_rset, one_etype_rset, relation_possible,

    nonempty_rset, non_final_entity,

    authenticated_user, match_user_groups, match_search_state,

    has_permission, has_add_permission,

    )

from cubicweb.web import uicfg, controller

from cubicweb.web.action import Action

from cubicweb.web.views import linksearch_select_url, vid_from_rset

from cubicweb.web.views.autoform import AutomaticEntityForm

class has_editable_relation(EntitySelector):

    """accept if some relations for an entity found in the result set is

    editable by the logged user.

    See `EntitySelector` documentation for behaviour when row is not specified.

    """

    def score_entity(self, entity):

        # if user has no update right but it can modify some relation,

        # display action anyway

        for dummy in AutomaticEntityForm.esrelations_by_category(

            entity, 'generic', 'add', strict=True):

            return 1

        for rschema, targetschemas, role in AutomaticEntityForm.erelations_by_category(

            entity, ('primary', 'secondary'), 'add', strict=True):

            if not rschema.final:

                return 1

        return 0

@objectify_selector

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

    return req.match_search_state(rset)

@objectify_selector

def view_is_not_default_view(cls, req, rset=None, **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

@objectify_selector

def addable_etype_empty_rset(cls, req, rset=None, **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.final or eschema.is_subobject(strict=True)) \

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

                return 1

    return 0

# generic 'main' 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') & nonempty_rset() & 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()

        for param in ('vid', '__message') + controller.NAV_FORM_PARAMETERS:

            params.pop(param, 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 "more" actions #######################################################

class ManagePermissionsAction(Action):

    id = 'managepermission'

    __select__ = one_line_rset() & non_final_entity() & match_user_groups('managers')

    title = _('manage permissions')

    category = 'moreactions'

    order = 15

    @classmethod

    def registered(cls, vreg):

        super(ManagePermissionsAction, cls).registered(vreg)

        if 'require_permission' in vreg.schema:

            cls.__select__ = (one_line_rset() & non_final_entity() &

                              (match_user_groups('managers')

                               | relation_possible('require_permission', 'subject', 'CWPermission',

                                                   action='add')))

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

    def url(self):

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

class DeleteAction(Action):

    id = 'delete'

    __select__ = has_permission('delete')

    title = _('delete')

    category = 'moreactions'

    order = 20

    def url(self):

        if len(self.rset) == 1:

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

                   | (two_lines_rset() & one_etype_rset & has_add_permission()))

                  )

    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)

class AddRelatedActions(Action):

    """fill 'addrelated' sub-menu of the actions box"""

    id = 'addrelated'

    __select__ = Action.__select__ & one_line_rset() & non_final_entity()

    submenu = _('addrelated')

    order = 20

    def fill_menu(self, box, menu):

        # when there is only one item in the sub-menu, replace the sub-menu by

        # item's title prefixed by 'add'

        menu.label_prefix = self.req._('add')

        super(AddRelatedActions, self).fill_menu(box, menu)

    def actual_actions(self):

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

        eschema = entity.e_schema

        for rschema, teschema, x in self.add_related_schemas(entity):

            if x == 'subject':

                label = 'add %s %s %s %s' % (eschema, rschema, teschema, x)

                url = self.linkto_url(entity, rschema, teschema, 'object')

            else:

                label = 'add %s %s %s %s' % (teschema, rschema, eschema, x)

                url = self.linkto_url(entity, rschema, teschema, 'subject')

            yield self.build_action(self.req._(label), url)

    def add_related_schemas(self, entity):

        """this is actually used ui method to generate 'addrelated' actions from

        the schema.

        If you don't want any auto-generated actions, you should overrides this

        method to return an empty list. If you only want some, you can configure

        them by using uicfg.actionbox_appearsin_addmenu

        """

        appearsin_addmenu = uicfg.actionbox_appearsin_addmenu

        req = self.req

        eschema = entity.e_schema

        for role, rschemas in (('subject', eschema.subject_relations()),

                               ('object', eschema.object_relations())):

            for rschema in rschemas:

                if rschema.final:

                    continue

                # check the relation can be added as well

                # XXX consider autoform_permissions_overrides?

                if role == 'subject'and not rschema.has_perm(req, 'add',

                                                             fromeid=entity.eid):

                    continue

                if role == 'object'and not rschema.has_perm(req, 'add',

                                                            toeid=entity.eid):

                    continue

                # check the target types can be added as well

                for teschema in rschema.targets(eschema, role):

                    if not appearsin_addmenu.etype_get(eschema, rschema,

                                                       role, teschema):

                        continue

                    if teschema.has_local_role('add') or teschema.has_perm(req, 'add'):

                        yield rschema, teschema, role

    def linkto_url(self, entity, rtype, etype, target):

        return self.build_url('add/%s' % etype,

                              __linkto='%s:%s:%s' % (rtype, entity.eid, target),

                              __redirectpath=entity.rest_path(), # should not be url quoted!

                              __redirectvid=self.req.form.get('vid', ''))

# 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('cwuser/%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 SiteInfoAction(ManagersAction):

    id = 'siteinfo'

    title = _('info')

    order = 30

    __select__ = match_user_groups('users','managers')

class PoweredByAction(Action):

    id = 'poweredby'

    __select__ = yes()

    category = 'footer'

    order = 3

    title = _('powered by CubicWeb')

    def url(self):

        return 'http://www.cubicweb.org'

from logilab.common.deprecation import class_moved

from cubicweb.web.views.bookmark import FollowAction

FollowAction = class_moved(FollowAction)

## default actions ui configuration ###########################################