"""Bases HTML components:

* the rql input form

* the logged user link

* the workflow history section for workflowable objects

:organization: Logilab

:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

"""

__docformat__ = "restructuredtext en"

from rql import parse

from cubicweb import Unauthorized

from cubicweb.common.uilib import html_escape, toggle_action

from cubicweb.common.selectors import yes, non_final_entity, one_line_rset

from cubicweb.schema import display_name

from cubicweb.common.selectors import (chainfirst, two_etypes_rset,

                                    match_form_params)

from cubicweb.web.htmlwidgets import MenuWidget, PopupBoxMenu, BoxSeparator, BoxLink

from cubicweb.web.component import (VComponent, SingletonVComponent, EntityVComponent, 

                                    RelatedObjectsVComponent)

_ = unicode

class RQLInputForm(SingletonVComponent):

    """build the rql input form, usually displayed in the header"""

    id = 'rqlinput'

    visible = False

    def call(self, view=None):

        if hasattr(view, 'filter_box_context_info'):

            rset = view.filter_box_context_info()[0]

        else:

            rset = self.rset

        # display multilines query as one line

        rql = rset is not None and rset.printable_rql(encoded=False) or self.req.form.get('rql', '')

        rql = rql.replace(u"\n", u" ")

        req = self.req

        self.w(u'''<div id="rqlinput" class="%s">

          <form action="%s">

<fieldset>

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

<input type="submit" value="%s" class="searchButton" tabindex="%s" />

</fieldset>

''' % (not self.propval('visible') and 'hidden' or '', 

       self.build_url('view'), html_escape(rql), req._('full text or RQL query'), req.next_tabindex(),

       req._('search'), req.next_tabindex()))

        if self.req.search_state[0] != 'normal':

            self.w(u'<input type="hidden" name="__mode" value="%s"/>'

                   % ':'.join(req.search_state[1]))

        self.w(u'</form></div>')

class ApplLogo(SingletonVComponent):

    """build the application logo, usually displayed in the header"""

    id = 'logo'

    site_wide = True # don't want user to hide this component using an eproperty

    def call(self):

        self.w(u'<a href="%s"><img class="logo" src="%s" alt="logo"/></a>'

               % (self.req.base_url(), self.req.external_resource('LOGO')))

class ApplHelp(SingletonVComponent):

    """build the help button, usually displayed in the header"""

    id = 'help'

    def call(self):

        self.w(u'<a href="%s" class="help" title="%s">&nbsp;</a>'

               % (self.build_url(_restpath='doc/main'),

                  self.req._(u'help'),))

class UserLink(SingletonVComponent):

    """if the user is the anonymous user, build a link to login

    else a link to the connected user object with a loggout link

    """

    id = 'loggeduserlink'

    site_wide = True # don't want user to hide this component using an eproperty

    def call(self):

        if not self.req.cnx.anonymous_connection:

            # display useractions and siteactions

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

            box = MenuWidget('', 'userActionsBox', _class='', islist=False)

            menu = PopupBoxMenu(self.req.user.login, isitem=False)

            box.append(menu)

            for action in actions.get('useractions', ()):

                menu.append(BoxLink(action.url(), self.req._(action.title),

                                    action.html_class()))

            if actions.get('useractions') and actions.get('siteactions'):

                menu.append(BoxSeparator())

            for action in actions.get('siteactions', ()):

                menu.append(BoxLink(action.url(), self.req._(action.title),

                                    action.html_class()))

            box.render(w=self.w)

        else:

            self.anon_user_link()

    def anon_user_link(self):

        if self.config['auth-mode'] == 'cookie':

            self.w(self.req._('anonymous'))

            self.w(u'''&nbsp;[<a class="logout" href="javascript: popupLoginBox();">%s</a>]'''

                   % (self.req._('i18n_login_popup')))

        else:

            self.w(self.req._('anonymous'))

            self.w(u'&nbsp;[<a class="logout" href="%s">%s</a>]'

                   % (self.build_url('login'), self.req._('login')))

class ApplicationMessage(SingletonVComponent):

    """display application's messages given using the __message parameter

    into a special div section

    """

    __selectors__ = yes,

    id = 'applmessages'

    site_wide = True # don't want user to hide this component using an eproperty

    def call(self):

        msgs = [msg for msg in (self.req.get_shared_data('sources_error', pop=True),

                                self.req.message) if msg]

        self.w(u'<div id="appMsg" onclick="%s" class="%s">\n' %

               (toggle_action('appMsg'), (msgs and ' ' or 'hidden')))

        for msg in msgs:

            self.w(u'<div class="message" id="%s">%s</div>' % (

                self.div_id(), msg))

        self.w(u'</div>')

class WFHistoryVComponent(EntityVComponent):

    """display the workflow history for entities supporting it"""

    id = 'wfhistory'

    accepts = ('Any',)

    context = 'navcontentbottom'

    rtype = 'wf_info_for'

    target = 'subject'

    title = _('Workflow history')

    def call(self, view=None):

        _ = self.req._

        eid = self.rset[0][0]

        sel = 'Any FS,TS,WF,D'

        rql = ' ORDERBY D DESC WHERE WF wf_info_for X,'\

              'WF from_state FS, WF to_state TS, WF comment C,'\

              'WF creation_date D'

        if self.vreg.schema.eschema('EUser').has_perm(self.req, 'read'):

            sel += ',U,C'

            rql += ', WF owned_by U?'

            displaycols = range(5)

            headers = (_('from_state'), _('to_state'), _('comment'), _('date'),

                       _('EUser'))            

        else:

            sel += ',C'

            displaycols = range(4)

            headers = (_('from_state'), _('to_state'), _('comment'), _('date'))

        rql = '%s %s, X eid %%(x)s' % (sel, rql)

        try:

            rset = self.req.execute(rql, {'x': eid}, 'x')

        except Unauthorized:

            return

        if rset:

            self.wview('table', rset, title=_(self.title), displayactions=False,

                       displaycols=displaycols, headers=headers)

class ApplicationName(SingletonVComponent):

    """display the application name"""

    id = 'appliname'

    def call(self):

        self.w(u'<span id="appliName"><a href="%s">%s</a></span>' % (self.req.base_url(),

                                                         self.req.property_value('ui.site-title')))

class SeeAlsoVComponent(RelatedObjectsVComponent):

    """display any entity's see also"""

    id = 'seealso'

    context = 'navcontentbottom'

    rtype = 'see_also'

    target = 'object'

    order = 40

    # register msg not generated since no entity use see_also in cubicweb itself

    title = _('contentnavigation_seealso')

    help = _('contentnavigation_seealso_description')

class EtypeRestrictionComponent(SingletonVComponent):

    """displays the list of entity types contained in the resultset

    to be able to filter accordingly.

    """

    id = 'etypenavigation'

    __select__ = classmethod(chainfirst(two_etypes_rset, match_form_params))

    form_params = ('__restrtype', '__restrtypes', '__restrrql')

    visible = False # disabled by default

    def call(self):

        _ = self.req._

        self.w(u'<div id="etyperestriction">')

        restrtype = self.req.form.get('__restrtype')

        restrtypes = self.req.form.get('__restrtypes', '').split(',')

        restrrql = self.req.form.get('__restrrql')

        if not restrrql:

            rqlst = self.rset.syntax_tree()

            restrrql = rqlst.as_string(self.req.encoding, self.rset.args)

            restrtypes = self.rset.column_types(0)

        else:

            rqlst = parse(restrrql)

        html = []

        on_etype = False

        etypes = sorted((display_name(self.req, etype).capitalize(), etype)

                        for etype in restrtypes)

        for elabel, etype in etypes:

            if etype == restrtype:

                html.append(u'<span class="selected">%s</span>' % elabel)

                on_etype = True

            else:

                rqlst.save_state()

                for select in rqlst.children:

                    select.add_type_restriction(select.selection[0], etype)

                newrql = rqlst.as_string(self.req.encoding, self.rset.args)

                url = self.build_url(rql=newrql, __restrrql=restrrql,

                                     __restrtype=etype, __restrtypes=','.join(restrtypes))

                html.append(u'<span><a href="%s">%s</a></span>' % (

                        html_escape(url), elabel))

                rqlst.recover()

        if on_etype:

            url = self.build_url(rql=restrrql)

            html.insert(0, u'<span><a href="%s">%s</a></span>' % (

                    url, _('Any')))

        else:

            html.insert(0, u'<span class="selected">%s</span>' % _('Any'))

        self.w(u' | '.join(html))

        self.w(u'</div>')

class RSSFeedURL(VComponent):

    id = 'rss_feed_url'

    __selectors__ = (non_final_entity,)

    def feed_url(self):

        return self.build_url(rql=self.limited_rql(), vid='rss')

class RSSEntityFeedURL(VComponent):

    id = 'rss_feed_url'

    __selectors__ = (non_final_entity, one_line_rset)

    def feed_url(self):

        return self.entity(0, 0).rss_feed_url()