## $Id: export.py 12859 2015-04-16 18:49:08Z henrik $
##
## Copyright (C) 2012 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
##
"""Exporters for applicant-related stuff.
"""
import grok
from zope.catalog.interfaces import ICatalog
from zope.component import queryUtility
from waeup.kofa.applicants.interfaces import (
    IApplicantBaseData, IApplicantsContainer)
from waeup.kofa.interfaces import ICSVExporter
from waeup.kofa.interfaces import MessageFactory as _
from waeup.kofa.utils.batching import ExporterBase
from waeup.kofa.utils.helpers import iface_names

class ApplicantsContainerExporter(grok.GlobalUtility, ExporterBase):
    """The Applicants Container Exporter exports container data. It does not
    export applicants (application records) inside the container.
    """
    grok.implements(ICSVExporter)
    grok.name('applicantscontainers')

    fields = tuple(sorted(iface_names(IApplicantsContainer)))
    title = _(u'Applicants Containers')

    def mangle_value(self, value, name, context=None):
        return super(
            ApplicantsContainerExporter, self).mangle_value(
            value, name, context=context)

    def export(self, containers, filepath=None):
        """Export `containers`, an iterable, as CSV file.

        If `filepath` is ``None``, a raw string with CSV data is returned.
        """
        writer, outfile = self.get_csv_writer(filepath)
        for container in containers:
            self.write_item(container, writer)
        return self.close_outfile(filepath, outfile)

    def export_all(self, site, filepath=None):
        """Export applicantscontainer into filepath as CSV data.

        If `filepath` is ``None``, a raw string with CSV data is returned.
        """
        writer, outfile = self.get_csv_writer(filepath)
        containers = site.get('applicants', {})
        return self.export(containers.values(), filepath)


class ApplicantExporter(grok.GlobalUtility, ExporterBase):
    """The Applicant Exporter exports all application records (= applicants)
    stored in the database. In contrast to the exporters in the academics
    section this exporter does not iterate over the items of containers
    but searches the Applicants Catalog instead.
    """
    grok.implements(ICSVExporter)
    grok.name('applicants')

    fields = tuple(sorted(IApplicantBaseData.names())) + ('container_code',)
    title = _(u'Applicants')

    def mangle_value(self, value, name, context=None):
        """The mangler determines the the codes of the atributes `course1`,
        `course2` and `course_admitted`. It furthermore prepares the
        history messages and adds a hash symbol at the end of the phone number
        to avoid annoying automatic number transformation by Excel or Calc.
        """
        if name in (
            'course1', 'course2', 'course_admitted') and value is not None:
            value = value.code
        #elif name == 'school_grades':
        #    value = [eval(entry.to_string()) for entry in value]
        elif name == 'history':
            value = value.messages
        elif name == 'phone' and value is not None:
            # Append hash '#' to phone numbers to circumvent
            # unwanted excel automatic
            value = str('%s#' % value)
        return super(
            ApplicantExporter, self).mangle_value(
            value, name, context=context)

    def export(self, applicants, filepath=None):
        """Export `applicants`, an iterable, as CSV file.

        If `filepath` is ``None``, a raw string with CSV data is returned.
        """
        writer, outfile = self.get_csv_writer(filepath)
        for applicant in applicants:
            self.write_item(applicant, writer)
        return self.close_outfile(filepath, outfile)

    def export_all(self, site, filepath=None):
        """Export applicants into filepath as CSV data.

        If `filepath` is ``None``, a raw string with CSV data is returned.
        """
        catalog = queryUtility(
            ICatalog, context=site, name='applicants_catalog', default=None)
        if catalog is None:
            return self.export([], filepath)
        applicants = catalog.searchResults(
            # reg_num might not be set and then would not be found.
            # We therefore search for applicant_id.
            applicant_id=(None, None))
        return self.export(applicants, filepath)

    def export_filtered(self, site, filepath=None, **kw):
        """Export applicants in container.

        If `filepath` is ``None``, a raw string with CSV data should
        be returned.
        """
        container = grok.getSite()['applicants'][kw['container']]
        return self.export(container.values(), filepath=filepath)