## $Id: interfaces.py 15530 2019-07-31 10:49:59Z 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
##
"""Customized interfaces of the university application package.
"""

from zope import schema
from zope.interface import Attribute, invariant, Invalid
from waeup.kofa.applicants.interfaces import (
    IApplicantBaseData,
    AppCatCertificateSource, CertificateSource)
from waeup.kofa.schoolgrades import ResultEntryField
from waeup.kofa.interfaces import (
    SimpleKofaVocabulary, academic_sessions_vocab, validate_email)
from waeup.kofa.schema import FormattedDate, TextLineChoice, PhoneNumber
from waeup.kofa.interfaces import IKofaObject
from waeup.kofa.students.vocabularies import (
    nats_vocab, GenderSource, StudyLevelSource)
from waeup.kofa.applicants.interfaces import (
    contextual_reg_num_source,
    IApplicantBaseData)
from waeup.kofa.university.vocabularies import StudyModeSource
from kofacustom.nigeria.applicants.interfaces import (
    LGASource, high_qual, high_grade, exam_types,
    INigeriaUGApplicant, INigeriaPGApplicant,
    INigeriaApplicantOnlinePayment,
    INigeriaUGApplicantEdit, INigeriaPGApplicantEdit,
    INigeriaApplicantUpdateByRegNo,
    IPUTMEApplicantEdit,
    )
from waeup.aaue.interfaces import MessageFactory as _
from waeup.aaue.payments.interfaces import ICustomOnlinePayment

programme_types_vocab = SimpleKofaVocabulary(
    (_('Undergraduate Programme (100 level)'), 'regular'),
    (_('Direct Entry (200 level)'), 'direct'),
    (_('not applicable'), 'na'),
    )

certificate_types_vocab = SimpleKofaVocabulary(
    (_('Full-time Degree'), 'ft'),
    (_('Part-time Degree'), 'pt'),
    (_('Diploma'), 'dp'),
    (_('Masters Degree'), 'ma'),
    (_('Doctorate Degree'), 'phd'),
    )

document_types_vocab = SimpleKofaVocabulary(
    (_('Certificate'), 'certificate'),
    (_('Result'), 'result'),
    (_('Transcript'), 'transcript'),
    (_('Studentship'), 'studship'),
    )

class ICustomUGApplicant(IApplicantBaseData):
    """An undergraduate applicant.

    This interface defines the least common multiple of all fields
    in ug application forms. In customized forms, fields can be excluded by
    adding them to the UG_OMIT* tuples.
    """

    #programme_type = schema.Choice(
    #    title = _(u'Programme Type'),
    #    vocabulary = programme_types_vocab,
    #    required = False,
    #    )

    nationality = schema.Choice(
        source = nats_vocab,
        title = _(u'Nationality'),
        required = True,
        )

    lga = schema.Choice(
        source = LGASource(),
        title = _(u'State/LGA (Nigerians only)'),
        required = False,
        )

    perm_address = schema.Text(
        title = _(u'Permanent Address'),
        required = False,
        )

    home_town = schema.TextLine(
        title = _(u'Home Town'),
        required = False,
        )

    #jamb_reg_number = schema.TextLine(
    #    title = _(u'JAMB Registration Number'),
    #    required = False,
    #    )

    jamb_score = schema.Int(
        title = _(u'Total JAMB Score'),
        required = False,
        )

    jamb_subjects = schema.Text(
        title = _(u'JAMB Subjects and Scores'),
        required = False,
        )

    course1 = schema.Choice(
        title = _(u'1st Choice Course of Study'),
        source = AppCatCertificateSource(),
        required = False,
        )

    course2 = schema.Choice(
        title = _(u'2nd Choice Course of Study'),
        source = AppCatCertificateSource(),
        required = False,
        )

    course3 = schema.Choice(
        title = _(u'3rd Choice Course of Study'),
        source = AppCatCertificateSource(),
        required = False,
        )

    fst_sit_fname = schema.TextLine(
        title = _(u'Full Name'),
        required = False,
        readonly = False,
        )

    fst_sit_no = schema.TextLine(
        title = _(u'Exam Number'),
        required = False,
        readonly = False,
        )

    fst_sit_sc_pin = schema.TextLine(
        title = _(u'Scratch Card Pin'),
        required = False,
        readonly = False,
        )

    fst_sit_sc_serial_number = schema.TextLine(
        title = _(u'Scratch Card Serial Number'),
        required = False,
        readonly = False,
        )

    fst_sit_date = FormattedDate(
        title = _(u'Exam Date'),
        required = False,
        readonly = False,
        show_year = True,
        )

    fst_sit_type = schema.Choice(
        title = _(u'Exam Type'),
        required = False,
        readonly = False,
        vocabulary = exam_types,
        )

    fst_sit_results = schema.List(
        title = _(u'Exam Results'),
        value_type = ResultEntryField(),
        required = False,
        readonly = False,
        defaultFactory=list,
        )

    scd_sit_fname = schema.TextLine(
        title = _(u'Full Name'),
        required = False,
        readonly = False,
        )

    scd_sit_no = schema.TextLine(
        title = _(u'Exam Number'),
        required = False,
        readonly = False,
        )

    scd_sit_sc_pin = schema.TextLine(
        title = _(u'Scratch Card Pin'),
        required = False,
        readonly = False,
        )

    scd_sit_sc_serial_number = schema.TextLine(
        title = _(u'Scratch Card Serial Number'),
        required = False,
        readonly = False,
        )

    scd_sit_date = FormattedDate(
        title = _(u'Exam Date'),
        required = False,
        readonly = False,
        show_year = True,
        )

    scd_sit_type = schema.Choice(
        title = _(u'Exam Type'),
        required = False,
        readonly = False,
        vocabulary = exam_types,
        )

    scd_sit_results = schema.List(
        title = _(u'Exam Results'),
        value_type = ResultEntryField(),
        required = False,
        readonly = False,
        defaultFactory=list,
        )

    alr_fname = schema.TextLine(
        title = _(u'Full Name'),
        required = False,
        readonly = False,
        )

    alr_no = schema.TextLine(
        title = _(u'Exam Number'),
        required = False,
        readonly = False,
        )

    alr_date = FormattedDate(
        title = _(u'Exam Date'),
        required = False,
        readonly = False,
        show_year = True,
        )

    alr_results = schema.List(
        title = _(u'Exam Results'),
        value_type = ResultEntryField(),
        required = False,
        readonly = False,
        defaultFactory=list,
        )

    hq_type = schema.Choice(
        title = _(u'Qualification Obtained'),
        required = False,
        readonly = False,
        vocabulary = high_qual,
        )

    hq_fname = schema.TextLine(
        title = _(u'Full Name'),
        required = False,
        readonly = False,
        )

    hq_matric_no = schema.TextLine(
        title = _(u'Former Matric Number'),
        required = False,
        readonly = False,
        )

    hq_degree = schema.Choice(
        title = _(u'Class of Degree'),
        required = False,
        readonly = False,
        vocabulary = high_grade,
        )

    hq_school = schema.TextLine(
        title = _(u'Institution Attended'),
        required = False,
        readonly = False,
        )

    hq_session = schema.TextLine(
        title = _(u'Years Attended'),
        required = False,
        readonly = False,
        )

    hq_disc = schema.TextLine(
        title = _(u'Discipline'),
        required = False,
        readonly = False,
        )

    hq_type2 = schema.Choice(
        title = _(u'Qualification Obtained'),
        required = False,
        readonly = False,
        vocabulary = high_qual,
        )

    hq_fname2 = schema.TextLine(
        title = _(u'Full Name'),
        required = False,
        readonly = False,
        )

    hq_matric_no2 = schema.TextLine(
        title = _(u'Former Matric Number'),
        required = False,
        readonly = False,
        )

    hq_degree2 = schema.Choice(
        title = _(u'Class of Degree'),
        required = False,
        readonly = False,
        vocabulary = high_grade,
        )

    hq_school2 = schema.TextLine(
        title = _(u'Institution Attended'),
        required = False,
        readonly = False,
        )

    hq_session2 = schema.TextLine(
        title = _(u'Years Attended'),
        required = False,
        readonly = False,
        )

    hq_disc2 = schema.TextLine(
        title = _(u'Discipline'),
        required = False,
        readonly = False,
        )

    hq_type3 = schema.Choice(
        title = _(u'Qualification Obtained'),
        required = False,
        readonly = False,
        vocabulary = high_qual,
        )

    hq_fname3 = schema.TextLine(
        title = _(u'Full Name'),
        required = False,
        readonly = False,
        )

    hq_matric_no3 = schema.TextLine(
        title = _(u'Former Matric Number'),
        required = False,
        readonly = False,
        )

    hq_degree3 = schema.Choice(
        title = _(u'Class of Degree'),
        required = False,
        readonly = False,
        vocabulary = high_grade,
        )

    hq_school3 = schema.TextLine(
        title = _(u'Institution Attended'),
        required = False,
        readonly = False,
        )

    hq_session3 = schema.TextLine(
        title = _(u'Years Attended'),
        required = False,
        readonly = False,
        )

    hq_disc3 = schema.TextLine(
        title = _(u'Discipline'),
        required = False,
        readonly = False,
        )

    nysc_year = schema.Int(
        title = _(u'Nysc Year'),
        required = False,
        readonly = False,
        )

    nysc_location = schema.TextLine(
        title = _(u'Nysc Location'),
        required = False,
        )

    nysc_lga = schema.Choice(
        source = LGASource(),
        title = _(u'Nysc LGA'),
        required = False,
        )

    employer = schema.TextLine(
        title = _(u'Employer'),
        required = False,
        readonly = False,
        )

    emp_position = schema.TextLine(
        title = _(u'Employer Position'),
        required = False,
        readonly = False,
        )

    emp_start = FormattedDate(
        title = _(u'Start Date'),
        required = False,
        readonly = False,
        show_year = True,
        )

    emp_end = FormattedDate(
        title = _(u'End Date'),
        required = False,
        readonly = False,
        show_year = True,
        )

    emp_reason = schema.TextLine(
        title = _(u'Reason for Leaving'),
        required = False,
        readonly = False,
        )

    employer2 = schema.TextLine(
        title = _(u'2nd Employer'),
        required = False,
        readonly = False,
        )

    emp2_position = schema.TextLine(
        title = _(u'2nd Employer Position'),
        required = False,
        readonly = False,
        )

    emp2_start = FormattedDate(
        title = _(u'Start Date'),
        required = False,
        readonly = False,
        show_year = True,
        )

    emp2_end = FormattedDate(
        title = _(u'End Date'),
        required = False,
        readonly = False,
        show_year = True,
        )

    emp2_reason = schema.TextLine(
        title = _(u'Reason for Leaving'),
        required = False,
        readonly = False,
        )

    former_matric = schema.TextLine(
        title = _(u'If yes, matric number'),
        required = False,
        readonly = False,
        )

    notice = schema.Text(
        title = _(u'Notice'),
        required = False,
        )


    master_sheet_number = schema.TextLine(
        title = _(u'Master Sheet Number'),
        required = False,
        readonly = False,
        )

    screening_venue = schema.TextLine(
        title = _(u'Screening Venue'),
        required = False,
        )

    screening_date = schema.TextLine(
        title = _(u'Screening Date'),
        required = False,
        )

    screening_score = schema.Int(
        title = _(u'Screening Points'),
        required = False,
        )

    student_id = schema.TextLine(
        title = _(u'Student Id'),
        required = False,
        readonly = False,
        )

    course_admitted = schema.Choice(
        title = _(u'Admitted Course of Study'),
        source = CertificateSource(),
        required = False,
        )

    locked = schema.Bool(
        title = _(u'Form locked'),
        default = False,
        )

    @invariant
    def course_choice(applicant):
        if applicant.course1 == applicant.course2:
            raise Invalid(_("2nd choice course must differ from 1st choice course."))
        if applicant.course1 == applicant.course3:
            raise Invalid(_("3rd choice course must differ from 1st choice course."))
        if applicant.course2 == applicant.course3:
            raise Invalid(_("3rd choice course must differ from 2nd choice course."))

#ICustomUGApplicant['programme_type'].order = IApplicantBaseData[
#    'reg_number'].order

class ICustomPGApplicant(INigeriaPGApplicant):
    """A postgraduate applicant.

    This interface defines the least common multiple of all fields
    in pg application forms. In customized forms, fields can be excluded by
    adding them to the PG_OMIT* tuples.
    """

class ITranscriptApplicant(IKofaObject):
    """A transcript applicant.
    """

    suspended = schema.Bool(
        title = _(u'Account suspended'),
        default = False,
        required = False,
        )

    locked = schema.Bool(
        title = _(u'Form locked'),
        default = False,
        required = False,
        )

    applicant_id = schema.TextLine(
        title = _(u'Applicant Id'),
        required = False,
        readonly = False,
        )

    reg_number = TextLineChoice(
        title = _(u'Kofa Registration Number'),
        readonly = False,
        required = True,
        source = contextual_reg_num_source,
        )

    firstname = schema.TextLine(
        title = _(u'First Name'),
        required = True,
        )

    middlename = schema.TextLine(
        title = _(u'Middle Name'),
        required = False,
        )

    lastname = schema.TextLine(
        title = _(u'Last Name (Surname)'),
        required = True,
        )

    matric_number = schema.TextLine(
        title = _(u'Matriculation Number'),
        readonly = False,
        required = True,
        )

    date_of_birth = FormattedDate(
        title = _(u'Date of Birth'),
        required = False,
        #date_format = u'%d/%m/%Y', # Use grok-instance-wide default
        show_year = True,
        )

    place_of_birth = schema.TextLine(
        title = _(u'Place of Birth'),
        readonly = False,
        required = False,
        )

    nationality = schema.Choice(
        vocabulary = nats_vocab,
        title = _(u'Nationality'),
        required = False,
        )

    email = schema.ASCIILine(
        title = _(u'Email Address'),
        required = True,
        constraint=validate_email,
        )

    phone = PhoneNumber(
        title = _(u'Phone'),
        description = u'',
        required = False,
        )

    perm_address = schema.Text(
        title = _(u'Current Local Address'),
        required = False,
        readonly = False,
        )

    dispatch_address = schema.Text(
        title = _(u'Dispatch Addresses'),
        description = u'Addresses to which transcript should be posted.',
        required = False,
        readonly = False,
        )

    entry_mode = schema.Choice(
        title = _(u'Entry Mode'),
        source = StudyModeSource(),
        required = False,
        readonly = False,
        )

    entry_session = schema.Choice(
        title = _(u'Entry Session'),
        source = academic_sessions_vocab,
        required = False,
        readonly = False,
        )

    end_session = schema.Choice(
        title = _(u'End Session'),
        source = academic_sessions_vocab,
        required = False,
        readonly = False,
        )

    course_studied = schema.Choice(
        title = _(u'Course of Study / Degree'),
        source = CertificateSource(),
        required = False,
        readonly = False,
        )

    purpose = schema.TextLine(
        title = _(u'Purpose of this Application'),
        readonly = False,
        required = False,
        )

    course_changed = schema.Choice(
        title = _(u'Change of Study Course'),
        description = u'If yes, select previous course of study.',
        source = CertificateSource(),
        readonly = False,
        required = False,
        )

    change_level = schema.Choice(
        title = _(u'Change Level'),
        description = u'If yes, select level at which you changed course of study.',
        source = StudyLevelSource(),
        required = False,
        readonly = False,
        )

    no_copies = schema.Choice(
        title = _(u'Number of Copies'),
        description = u'Must correspond with the number of dispatch addresses above.',
        values=[1, 2, 3, 4],
        required = False,
        readonly = False,
        default = 1,
        )

class ICertificateRequest(IKofaObject):
    """A transcript applicant.
    """

    suspended = schema.Bool(
        title = _(u'Account suspended'),
        default = False,
        required = False,
        )

    locked = schema.Bool(
        title = _(u'Form locked'),
        default = False,
        required = False,
        )

    applicant_id = schema.TextLine(
        title = _(u'Applicant Id'),
        required = False,
        readonly = False,
        )

    reg_number = TextLineChoice(
        title = _(u'Kofa Registration Number'),
        readonly = False,
        required = True,
        source = contextual_reg_num_source,
        )

    firstname = schema.TextLine(
        title = _(u'First Name'),
        required = True,
        )

    middlename = schema.TextLine(
        title = _(u'Middle Name'),
        required = False,
        )

    lastname = schema.TextLine(
        title = _(u'Last Name (Surname)'),
        required = True,
        )

    matric_number = schema.TextLine(
        title = _(u'Matriculation Number'),
        readonly = False,
        required = True,
        )

    date_of_birth = FormattedDate(
        title = _(u'Date of Birth'),
        required = False,
        #date_format = u'%d/%m/%Y', # Use grok-instance-wide default
        show_year = True,
        )

    place_of_birth = schema.TextLine(
        title = _(u'Place of Birth'),
        readonly = False,
        required = False,
        )

    nationality = schema.Choice(
        vocabulary = nats_vocab,
        title = _(u'Nationality'),
        required = False,
        )

    email = schema.ASCIILine(
        title = _(u'Email Address'),
        required = True,
        constraint=validate_email,
        )

    phone = PhoneNumber(
        title = _(u'Phone'),
        description = u'',
        required = False,
        )

    entry_session = schema.Choice(
        title = _(u'Entry Session'),
        source = academic_sessions_vocab,
        required = False,
        readonly = False,
        )

    end_session = schema.Choice(
        title = _(u'End Session'),
        source = academic_sessions_vocab,
        required = False,
        readonly = False,
        )

    course_studied = schema.Choice(
        title = _(u'Course of Study / Degree'),
        source = CertificateSource(),
        required = True,
        readonly = False,
        )

    certificate_type = schema.Choice(
        title = _(u'Certificate Type'),
        vocabulary = certificate_types_vocab,
        required = False,
        )


class IVerificationRequest(IKofaObject):
    """A applicant asking for verification.
    """

    suspended = schema.Bool(
        title = _(u'Account suspended'),
        default = False,
        required = False,
        )

    locked = schema.Bool(
        title = _(u'Form locked'),
        default = False,
        required = False,
        )

    applicant_id = schema.TextLine(
        title = _(u'Applicant Id'),
        required = False,
        readonly = False,
        )

    #reg_number = TextLineChoice(
    #    title = _(u'Kofa Registration Number'),
    #    readonly = False,
    #    required = True,
    #    source = contextual_reg_num_source,
    #    )

    firstname = schema.TextLine(
        title = _(u'First Name'),
        required = True,
        )

    middlename = schema.TextLine(
        title = _(u'Middle Name'),
        required = False,
        )

    lastname = schema.TextLine(
        title = _(u'Last Name (Surname)'),
        required = True,
        )

    email = schema.ASCIILine(
        title = _(u'Email Address'),
        required = True,
        constraint=validate_email,
        )

    matric_number = schema.TextLine(
        title = _(u'Verification Body Reference Number'),
        readonly = False,
        required = True,
        )

    body_address = schema.Text(
        title = _(u'Verification Body Address'),
        required = True,
        )

    document_type = schema.Choice(
        title = _(u'Document Type'),
        vocabulary = document_types_vocab,
        required = True,
        )


class ICustomApplicant(ICustomUGApplicant, ICustomPGApplicant,
                       ITranscriptApplicant, ICertificateRequest,
                       IVerificationRequest):
    """An interface for all types of applicants.

    Attention: The ICustomPGApplicant field seetings will be overwritten
    by ICustomPGApplicant field settings. If a field is defined
    in both interfaces zope.schema validates only against the
    constraints in ICustomUGApplicant. This does not affect the forms
    since they are build on either ICustomUGApplicant or ICustomPGApplicant.
    """

    def writeLogMessage(view, comment):
        """Adds an INFO message to the log file
        """

    def createStudent():
        """Create a student object from applicatnt data
        and copy applicant object.
        """

class ICustomUGApplicantEdit(ICustomUGApplicant):
    """An undergraduate applicant interface for edit forms.

    Here we can repeat the fields from base data and set the
    `required` and `readonly` attributes to True to further restrict
    the data access. Or we can allow only certain certificates to be
    selected by choosing the appropriate source.

    We cannot omit fields here. This has to be done in the
    respective form page.
    """

    #programme_type = schema.Choice(
    #    title = _(u'Programme Type'),
    #    vocabulary = programme_types_vocab,
    #    required = True,
    #    )

    date_of_birth = FormattedDate(
        title = _(u'Date of Birth'),
        required = True,
        show_year = True,
        )

    course1 = schema.Choice(
        title = _(u'1st Choice Course of Study'),
        source = AppCatCertificateSource(),
        required = True,
        )

    course2 = schema.Choice(
        title = _(u'2nd Choice Course of Study'),
        source = AppCatCertificateSource(),
        required = True,
        )

    course3 = schema.Choice(
        title = _(u'3rd Choice Course of Study'),
        source = AppCatCertificateSource(),
        required = True,
        )

    fst_sit_fname = schema.TextLine(
        title = _(u'Full Name'),
        required = True,
        readonly = False,
        )

    fst_sit_no = schema.TextLine(
        title = _(u'Exam Number'),
        required = True,
        readonly = False,
        )

    fst_sit_sc_pin = schema.TextLine(
        title = _(u'Scratch Card Pin'),
        required = True,
        readonly = False,
        )

    fst_sit_sc_serial_number = schema.TextLine(
        title = _(u'Scratch Card Serial Number'),
        required = True,
        readonly = False,
        )

    fst_sit_date = FormattedDate(
        title = _(u'Exam Date'),
        required = True,
        readonly = False,
        show_year = True,
        )

    fst_sit_type = schema.Choice(
        title = _(u'Exam Type'),
        required = True,
        readonly = False,
        vocabulary = exam_types,
        )

    # course1 works only on manage pages. On edit pages course1 input is missing
    # and no Invalid exception is raised.
    # NoInputData: NoInputD...course1'
    # Therefore, we check and compare course1 on CustomApplicantEditFormPage.
    @invariant
    def course_choice(applicant):
        if applicant.course2 == applicant.course3:
            raise Invalid(_("3rd choice course must differ from 2nd choice course."))

#ICustomUGApplicantEdit['programme_type'].order = ICustomUGApplicant[
#    'programme_type'].order
ICustomUGApplicantEdit['date_of_birth'].order = ICustomUGApplicant[
    'date_of_birth'].order
ICustomUGApplicantEdit['course1'].order = ICustomUGApplicant[
    'course1'].order
ICustomUGApplicantEdit['course2'].order = ICustomUGApplicant[
    'course2'].order
ICustomUGApplicantEdit['course3'].order = ICustomUGApplicant[
    'course3'].order
ICustomUGApplicantEdit['fst_sit_fname'].order = ICustomUGApplicant[
    'fst_sit_fname'].order
ICustomUGApplicantEdit['fst_sit_no'].order = ICustomUGApplicant[
    'fst_sit_no'].order
ICustomUGApplicantEdit['fst_sit_sc_pin'].order = ICustomUGApplicant[
    'fst_sit_sc_pin'].order
ICustomUGApplicantEdit['fst_sit_sc_serial_number'].order = ICustomUGApplicant[
    'fst_sit_sc_serial_number'].order
ICustomUGApplicantEdit['fst_sit_date'].order = ICustomUGApplicant[
    'fst_sit_date'].order
ICustomUGApplicantEdit['fst_sit_type'].order = ICustomUGApplicant[
    'fst_sit_type'].order

class ICustomPGApplicantEdit(INigeriaPGApplicantEdit):
    """A postgraduate applicant interface for editing.

    Here we can repeat the fields from base data and set the
    `required` and `readonly` attributes to True to further restrict
    the data access. Or we can allow only certain certificates to be
    selected by choosing the appropriate source.

    We cannot omit fields here. This has to be done in the
    respective form page.
    """

class ICustomApplicantOnlinePayment(INigeriaApplicantOnlinePayment):
    """An applicant payment via payment gateways.

    """

class IPUTMEApplicantEdit(IPUTMEApplicantEdit):
    """An undergraduate applicant interface for editing.

    Here we can repeat the fields from base data and set the
    `required` and `readonly` attributes to True to further restrict
    the data access. Or we can allow only certain certificates to be
    selected by choosing the appropriate source.

    We cannot omit fields here. This has to be done in the
    respective form page.
    """

class ICustomApplicantUpdateByRegNo(ICustomApplicant):
    """Representation of an applicant.

    Skip regular reg_number validation if reg_number is used for finding
    the applicant object.
    """

    reg_number = schema.TextLine(
        title = u'Registration Number',
        required = False,
        )