## $Id: pdf.py 8552 2012-05-29 22:49:58Z henrik $
##
## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
## 
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
## 
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##
"""
Generate PDF docs for applicants.
"""
import grok
from reportlab.platypus import Paragraph, Spacer
from zope.component import getUtility
from zope.i18n import translate
from waeup.kofa.applicants.interfaces import IApplicant, IApplicantsUtils
from waeup.kofa.browser import DEFAULT_PASSPORT_IMAGE_PATH
from waeup.kofa.browser.interfaces import IPDFCreator
from waeup.kofa.browser.pdf import SMALL_PARA_STYLE
from waeup.kofa.interfaces import IExtFileStore, IPDF, IKofaUtils
from waeup.kofa.interfaces import MessageFactory as _
from waeup.kofa.widgets.datewidget import FriendlyDateDisplayWidget

class PDFApplicationSlip(grok.Adapter):
    """Create a PDF application slip for applicants.
    """
    # XXX: Many things in here are reusable. We might want to split
    # things. Possibly move parts to IPDFCreator?
    grok.context(IApplicant)
    grok.implements(IPDF)
    grok.name('application_slip')
    note = None

    form_fields =  grok.AutoFields(IApplicant).omit(
        'locked', 'course_admitted')
    form_fields['date_of_birth'].custom_widget = FriendlyDateDisplayWidget('le')

    @property
    def title(self):
        container_title = self.context.__parent__.title
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        ar_translation = translate(_('Application Record'),
            'waeup.kofa', target_language=portal_language)
        return '%s - %s %s' % (container_title,
            ar_translation, self.context.application_number)

    def _getCourseAdmittedLink(self, view):
        """Return link, title and code in html format to the certificate
           admitted.
        """
        course_admitted = self.context.course_admitted
        if view is not None and getattr(course_admitted, '__parent__',None):
            url = view.url(course_admitted)
            title = course_admitted.title
            code = course_admitted.code
            return '<a href="%s">%s - %s</a>' %(url,code,title)
        return ''

    def _getDeptAndFaculty(self):
        """Return long titles of department and faculty.

        Returns a list [department_title, faculty_title]

        If the context applicant has no course admitted or dept. and
        faculty cannot be determined, ``None`` is returned.
        """
        course_admitted = self.context.course_admitted
        dept = getattr(
                getattr(course_admitted, '__parent__', None),
                '__parent__', None)
        faculty = getattr(dept, '__parent__', None)
        return [x is not None and x.longtitle() or x for x in dept, faculty]

    def _addComments(self, data):
        if self.context.state == 'created':
            comment = translate(_(
                'Proceed to the login page of the portal' +
                ' and enter your new credentials:' +
                ' user name= ${a}, password = ${b}. ' +
                'Change your password when you have logged in.',
                mapping = {
                    'a':self.context.student_id,
                    'b':self.context.application_number}
                ))
            comment = Paragraph(comment, SMALL_PARA_STYLE)
            data.extend([Spacer(1, 18), comment])
        return data

    def __call__(self, view=None, note=None):
        """Return a PDF representation of the context applicant.

        If no `view` is given, the course admitted field will be an
        empty string and author will be set as ``'unknown'``.

        If a `view` is given, author will be set as the calling
        principal.
        """
        doc_title = '\n'.join([x.strip() for x in self.title.split(' - ')])
        data = []
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        separators = getUtility(IApplicantsUtils).SEPARATORS_DICT
        creator = getUtility(IPDFCreator)

        # append history
        data.extend(creator.fromStringList(self.context.history.messages))

        # append photograph
        img_path = getattr(
            getUtility(IExtFileStore).getFileByContext(self.context),
            'name', DEFAULT_PASSPORT_IMAGE_PATH)
        data.append(creator.getImage(img_path))
        data.append(Spacer(1, 12))

        # append widgets
        dept, faculty = self._getDeptAndFaculty()
        data.append(creator.getWidgetsTable(
            self.form_fields, self.context, view, lang=portal_language,
            domain='waeup.kofa', separators=separators,
            course_label='Admitted Course of Study:',
            course_link=self._getCourseAdmittedLink(view),
            dept=dept, faculty=faculty))

        # append comments
        data = self._addComments(data)

        return creator.create_pdf(data, None, doc_title, note=self.note)