"""Mass mailing form views

:organization: Logilab

:copyright: 2007-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

"""

import operator

from logilab.mtconverter import html_escape

from cubicweb.interfaces import IEmailable

from cubicweb.common.view import EntityView

from cubicweb.common.selectors import implement_interface, match_user_group

from cubicweb.web.action import EntityAction

from cubicweb.web import stdmsgs

class SendEmailAction(EntityAction):

    category = 'mainactions'

    __selectors__ = (implement_interface, match_user_group)

    accepts_interfaces = (IEmailable,) # XXX should check email is set as well

    require_groups = ('managers', 'users')

    id = 'sendemail'

    title = _('send email')

    def url(self):

        params = {'vid': 'massmailing', '__force_display': 1}

        if self.req.form.has_key('rql'):

            params['rql'] = self.req.form['rql']

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

                              **params)

class MassMailingForm(EntityView):

    id = 'massmailing'

    __selectors__ = (implement_interface, match_user_group)

    accepts_interfaces = (IEmailable,)

    require_groups = ('managers', 'users')

    form_template = u"""

<div id="compose">

<form id="sendemail" action="sendmail" method="post">

<table class="headersform">

<tr>

  <td class="hlabel">%(from_header)s</td>

  <td class="hvalue">%(from)s</td>

</tr>

<tr>

  <td class="hlabel">%(recipients_header)s</td>

  <td class="hvalue">%(recipients)s</td>

</tr>

<tr>

  <td class="hlabel">%(subject)s</td>

  <td class="hvalue"><input id="mailsubj" name="mailsubject" value="" /></td>

</tr>

</table>

<div id="toolbar">

<ul>

<li><a id="sendbutton" href="javascript: $('sendemail').submit()">

    <img src="%(sendimgpath)s" alt="%(send)s"/>%(send)s</a></li>

<li><a id="cancelbutton" href="javascript: history.back()">

    <img src="%(cancelimgpath)s" alt="%(cancel)s"/>%(cancel)s</a></li>

 </ul>

</div>

<table>

<tr>

  <td>

    <div>

      <div id="emailbody" class="widget" cubicweb:loadtype="auto" cubicweb:wdgtype="TemplateTextField"

           cubicweb:inputid="emailarea" cubicweb:inputname="mailbody" cubicweb:variables="%(variables)s"/>

    </div>

  </td>

  <td>%(substitutions)s</td>

</tr>

</table>

</form>

</div>

    """    

    def call(self):

        req = self.req

        req.add_js('cubicweb.widgets.js')

        req.add_css('cubicweb.mailform.css')

        from_addr = '%s <%s>' % (req.user.dc_title(), req.user.get_email())

        ctx = {

            'from_header' : req._('From: '),

            'from' : html_escape(from_addr),

            'substitutions' : self._build_substitutions_help(),

            'recipients_header' : req._('Recipients: '),

            'subject' : req._('Subject: '),

            'body' : req._('Email body: '),

            'variables' : ','.join(self._get_allowed_substitutions()),

            'recipients' : self._build_recipients_list(),

            'cancel' : req._(stdmsgs.BUTTON_CANCEL),

            'cancelimgpath' : req.external_resource('CANCEL_EMAIL_ICON'),

            'send' : req._('send email'),

            'sendimgpath' : req.external_resource('SEND_EMAIL_ICON'),

            }

        self.w(self.form_template % ctx)

    def _get_allowed_substitutions(self):

        coltypes = self.rset.column_types(0)

        attrs = []

        for coltype in coltypes:

            eclass = self.vreg.etype_class(coltype)

            attrs.append(eclass.allowed_massmail_keys())

        return sorted(reduce(operator.and_, attrs))

    def _build_recipients_list(self):

        emails = ((entity.eid, entity.get_email()) for entity in self.rset.entities())

        checkboxes = (u'<input name="recipient" type="checkbox" value="%s" checked="checked" />%s'

                      % (eid, html_escape(email)) for eid, email in emails if email)

        boxes = (u'<div class="recipient">%s</div>' % cbox for cbox in checkboxes)

        return u'<div id="recipients">%s</div>' % u'\n'.join(boxes)

    def _build_substitutions_help(self):

        insertLink = u'<a href="javascript: insertText(\'%%(%s)s\', \'emailarea\');">%%(%s)s</a>'

        substs = (u'<div class="substitution">%s</div>' % (insertLink % (subst, subst))

                  for subst in self._get_allowed_substitutions())

        helpmsg = self.req._('You can use any of the following substitutions in your text')

        return u'<div id="substitutions"><span>%s</span>%s</div>' % (

            helpmsg, u'\n'.join(substs))