"""Interfaces of access code related components.
"""

from zope import schema
from zope.interface import Interface

class IAccessCode(Interface):
    """An access code.
    """
    batch_serial = schema.Int(
        title = u'Serial number inside batch',
        )
    batch_prefix = schema.TextLine(
        title = u'Prefix inside batch',
        )
    batch_num = schema.Int(
        title = u'Batch number',
        )
    random_num = schema.TextLine(
        title = u'Random part of access code.',
        )
    cost = schema.Float(
        title = u'Cost of access code',
        )
    invalidation_date = schema.Datetime(
        title = u'Datetime of invalidation',
        required = False,
        default = None,
        )
    student_id = schema.TextLine(
        title = u'Student ID or registration number',
        required = False,
        default = None,
        )

class IAccessCodeBatch(Interface):
    """A factory for batches of access codes.
    """
    creation_date = schema.Date(
        title = u'Creation date',
        )
    creator = schema.TextLine(
        title = u'Batch creator',
        )
    batch_prefix = schema.TextLine(
        title = u'Prefix inside batch',
        )
    batch_num = schema.Int(
        title = u'Batch number',
        )

    def __iter__():
        """Iterate over all access codes in this batch.
        """