"""

generic boxes for CubicWeb web client:

* actions box

* possible views box

* rss icon

additional (disabled by default) boxes

* schema box

* startup views box

: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 logilab.mtconverter import html_escape

from cubicweb.selectors import any_rset, appobject_selectable, match_user_groups

from cubicweb.web.htmlwidgets import BoxWidget, BoxMenu, BoxHtml, RawBoxItem

from cubicweb.web.box import BoxTemplate

_ = unicode

class EditBox(BoxTemplate):

    """

    box with all actions impacting the entity displayed: edit, copy, delete

    change state, add related entities

    """

    __selectors__ = (any_rset,) + BoxTemplate.__selectors__

    id = 'edit_box'

    title = _('actions')

    order = 2

    def call(self, **kwargs):

        _ = self.req._

        title = _(self.title)

        if self.rset:

            etypes = self.rset.column_types(0)

            if len(etypes) == 1:

                plural = self.rset.rowcount > 1 and 'plural' or ''

                etypelabel = display_name(self.req, iter(etypes).next(), plural)

                title = u'%s - %s' % (title, etypelabel.lower())

        box = BoxWidget(title, self.id, _class="greyBoxFrame")

        # build list of actions

        actions = self.vreg.possible_actions(self.req, self.rset)

        add_menu = BoxMenu(_('add')) # 'addrelated' category

        other_menu = BoxMenu(_('more actions')) # 'moreactions' category

        searchstate = self.req.search_state[0]

        for category, menu in (('mainactions', box),

                               ('addrelated', add_menu),

                               ('moreactions', other_menu)):

            for action in actions.get(category, ()):

                menu.append(self.box_action(action))

        if self.rset and self.rset.rowcount == 1 and \

               not self.schema[self.rset.description[0][0]].is_final() and \

               searchstate == 'normal':

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

            #entity.complete()

            if add_menu.items:

                self.info('explicit actions defined, ignoring potential rtags for %s',

                          entity.e_schema)

            else:

                # some addrelated actions may be specified but no one is selectable

                # in which case we should not fallback to schema_actions. The proper

                # way to avoid this is to override add_related_schemas() on the

                # entity class to return an empty list

                for action in self.schema_actions(entity):

                    add_menu.append(action)

            self.workflow_actions(entity, box)

        if box.is_empty() and not other_menu.is_empty():

            box.items = other_menu.items

            other_menu.items = []

        self.add_submenu(box, add_menu, _('add'))

        self.add_submenu(box, other_menu)

        if not box.is_empty():

            box.render(self.w)

    def add_submenu(self, box, submenu, label_prefix=None):

        if len(submenu.items) == 1:

            boxlink = submenu.items[0]

            if label_prefix:

                boxlink.label = u'%s %s' % (label_prefix, boxlink.label)

            box.append(boxlink)

        elif submenu.items:

            box.append(submenu)

    def schema_actions(self, entity):

        user = self.req.user

        actions = []

        _ = self.req._

        eschema = entity.e_schema

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

            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')

            actions.append(self.mk_action(_(label), url))

        return actions

    def workflow_actions(self, entity, box):

        if 'in_state' in entity.e_schema.subject_relations() and entity.in_state:

            _ = self.req._

            state = entity.in_state[0]

            transitions = list(state.transitions(entity))

            if transitions:

                menu_title = u'%s: %s' % (_('state'), state.view('text'))

                menu_items = []

                for tr in state.transitions(entity):

                    url = entity.absolute_url(vid='statuschange', treid=tr.eid)

                    menu_items.append(self.mk_action(_(tr.name), url))

                box.append(BoxMenu(menu_title, menu_items))

            # when there are no possible transition, put state if the menu if

            # there are some other actions

            elif not box.is_empty():

                menu_title = u'<a title="%s">%s: <i>%s</i></a>' % (

                    _('no possible transition'), _('state'), state.view('text'))

                box.append(RawBoxItem(menu_title, 'boxMainactions'))

        return None

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

        return self.build_url(vid='creation', etype=etype,

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

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

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

class SearchBox(BoxTemplate):

    """display a box with a simple search form"""

    id = 'search_box'

    visible = True # enabled by default

    title = _('search')

    order = 0

    formdef = u"""<form action="%s">

<table id="tsearch"><tr><td>

<input id="norql" type="text" accesskey="q" tabindex="%s" title="search text" value="%s" name="rql" />

<input type="hidden" name="__fromsearchbox" value="1" />

<input type="hidden" name="subvid" value="tsearch" />

</td><td>

<input tabindex="%s" type="submit" id="rqlboxsubmit" value="" />

</td></tr></table>

</form>"""

    def call(self, view=None, **kwargs):

        req = self.req

        if req.form.pop('__fromsearchbox', None):

            rql = req.form.get('rql', '')

        else:

            rql = ''

        form = self.formdef % (req.build_url('view'), req.next_tabindex(),

                               html_escape(rql), req.next_tabindex())

        title = u"""<span onclick="javascript: toggleVisibility('rqlinput')">%s</span>""" % req._(self.title)

        box = BoxWidget(title, self.id, _class="searchBoxFrame", islist=False, escape=False)

        box.append(BoxHtml(form))

        box.render(self.w)            

# boxes disabled by default ###################################################

class PossibleViewsBox(BoxTemplate):

    """display a box containing links to all possible views"""

    id = 'possible_views_box'

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

    title = _('possible views')

    order = 10

    visible = False

    def call(self, **kwargs):

        box = BoxWidget(self.req._(self.title), self.id)

        views = [v for v in self.vreg.possible_views(self.req, self.rset)

                 if v.category != 'startupview']

        for category, views in self.sort_actions(views):

            menu = BoxMenu(category)

            for view in views:

                menu.append(self.box_action(view))

            box.append(menu)

        if not box.is_empty():

            box.render(self.w)

class RSSIconBox(BoxTemplate):

    """just display the RSS icon on uniform result set"""

    id = 'rss'

    __selectors__ = BoxTemplate.__selectors__ + (appobject_selectable('components', 'rss_feed_url'),)

    order = 999

    visible = False

    def call(self, **kwargs):

        try:

            rss = self.req.external_resource('RSS_LOGO')

        except KeyError:

            self.error('missing RSS_LOGO external resource')

            return

        urlgetter = self.vreg.select_component('rss_feed_url', self.req, self.rset)

        url = urlgetter.feed_url()

        self.w(u'<a href="%s"><img src="%s" alt="rss"/></a>\n' % (html_escape(url), rss))

class StartupViewsBox(BoxTemplate):

    """display a box containing links to all startup views"""

    id = 'startup_views_box'

    visible = False # disabled by default

    title = _('startup views')

    order = 70

    def call(self, **kwargs):

        box = BoxWidget(self.req._(self.title), self.id)

        for view in self.vreg.possible_views(self.req, None):

            if view.category == 'startupview':

                box.append(self.box_action(view))

        if not box.is_empty():

            box.render(self.w)