chrono/chrono/manager/forms.py

# chrono - agendas system
# Copyright (C) 2016  Entr'ouvert
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import csv
import datetime

from django import forms
from django.forms import ValidationError
from django.utils.translation import ugettext_lazy as _

from chrono.agendas.models import (Event, MeetingType, TimePeriod, Desk,
                                   TimePeriodException)

from . import widgets


DATETIME_OPTIONS = {
        'weekStart': 1,
        'autoclose': True,
        }


class DateTimeWidget(widgets.DateTimeWidget):
    def __init__(self, *args, **kwargs):
        super(DateTimeWidget, self).__init__(*args, options=DATETIME_OPTIONS, **kwargs)


class EventForm(forms.ModelForm):
    class Meta:
        model = Event
        widgets = {
                'agenda': forms.HiddenInput(),
                'start_datetime': DateTimeWidget(),
        }
        exclude = ['full', 'meeting_type', 'desk']


class NewMeetingTypeForm(forms.ModelForm):
    class Meta:
        model = MeetingType
        widgets = {
                'agenda': forms.HiddenInput(),
        }
        exclude = ['slug']


class MeetingTypeForm(forms.ModelForm):
    class Meta:
        model = MeetingType
        widgets = {
                'agenda': forms.HiddenInput(),
        }
        exclude = []


class TimePeriodForm(forms.ModelForm):
    class Meta:
        model = TimePeriod
        widgets = {
                'start_time': widgets.TimeWidget(),
                'end_time': widgets.TimeWidget(),
                'desk': forms.HiddenInput(),
        }
        exclude = []


class NewDeskForm(forms.ModelForm):
    class Meta:
        model = Desk
        widgets = {
            'agenda': forms.HiddenInput(),
        }
        exclude = ['slug']


class DeskForm(forms.ModelForm):
    class Meta:
        model = Desk
        widgets = {
            'agenda': forms.HiddenInput(),
        }
        exclude = []


class TimePeriodExceptionForm(forms.ModelForm):
    class Meta:
        model = TimePeriodException
        fields = ['desk', 'start_datetime', 'end_datetime', 'label']
        widgets = {
            'desk': forms.HiddenInput(),
            'start_datetime': DateTimeWidget(),
            'end_datetime': DateTimeWidget(),
        }

    def clean_end_datetime(self):
        if self.cleaned_data['end_datetime'] < self.cleaned_data['start_datetime']:
            raise ValidationError(_('End datetime must be greater than start datetime.'))
        return self.cleaned_data['end_datetime']


class ImportEventsForm(forms.Form):
    events_csv_file = forms.FileField(
            label=_('Events File'),
            required=True,
            help_text=_('CSV file with date, time, number of places, '
                        'number of places in waiting list, and label '
                        'as columns.'))
    events = None

    def clean_events_csv_file(self):
        content = self.cleaned_data['events_csv_file'].read()
        if '\0' in content:
            raise ValidationError(_('Invalid file format.'))

        try:
            dialect = csv.Sniffer().sniff(content)
        except csv.Error:
            dialect = None

        events = []
        for i, csvline in enumerate(csv.reader(content.splitlines(), dialect=dialect)):
            if not csvline:
                continue
            if len(csvline) < 3:
                raise ValidationError(_('Invalid file format. (line %d)') % (i+1))
            if i == 0 and csvline[0].strip('#') in ('date', 'Date', _('date'), _('Date')):
                continue
            event = Event()
            for datetime_fmt in ('%Y-%m-%d %H:%M', '%d/%m/%Y %H:%M',
                    '%d/%m/%Y %Hh%M', '%Y-%m-%d %H:%M:%S', '%d/%m/%Y %H:%M:%S'):
                try:
                    event_datetime = datetime.datetime.strptime(
                            '%s %s' % tuple(csvline[:2]), datetime_fmt)
                except ValueError:
                    continue
                event.start_datetime = event_datetime
                break
            else:
                raise ValidationError(_('Invalid file format. (date/time format, line %d)') % (i+1))
            try:
                event.places = int(csvline[2])
            except ValueError:
                raise ValidationError(_('Invalid file format. (number of places, line %d)') % (i+1))
            if len(csvline) >= 4:
                try:
                    event.waiting_list_places = int(csvline[3])
                except ValueError:
                    raise ValidationError(_('Invalid file format. (number of places in waiting list, line %d)') % (i+1))
            if len(csvline) >= 5:
                event.label = ' '.join(csvline[4:])
            events.append(event)
        self.events = events


class ExceptionsImportForm(forms.ModelForm):
    class Meta:
        model = Desk
        fields = []

    ics_file = forms.FileField(label=_('ICS File'),
                               help_text=_('ICS file containing events which will be considered as exceptions'))