Certificates and Certificate Courses
************************************

.. module:: waeup.kofa.university.certificate

Components that represent and manage certificates.

.. :doctest:
.. :layer: waeup.kofa.testing.KofaUnitTestLayer


Content Classes (models and containers)
=======================================


:class:`Certificate`
--------------------

.. class:: Certificate([code=u'NA',[ title=u'Unnamed Certificate',[ study_mode=None,[ start_level=None,[ end_level=None,[ application_category=None,[ m_prefix=u'']]]]]]])

   Create a certificate object with the given parameters.

   .. attribute:: grok.implements(ICertificate)

   All parameters are optional:

     >>> from waeup.kofa.university.certificate import Certificate
     >>> mycertificate = Certificate()

   Certificates have the attributes required by the `ICertificate` interface:

     >>> from waeup.kofa.university.interfaces import ICertificate
     >>> ICertificate.providedBy(mycertificate)
     True

     >>> from zope.interface.verify import verifyObject
     >>> verifyObject(ICertificate, mycertificate)
     True

   Beside the attributes, certificates are containers for
   certificate-courses (see :class:`CertificateCourse`). Each
   certificate course can be accessed by the code of the course it wraps.

   .. attribute:: title

      Each certificate has a title:

        >>> mycertificate.title
        u'Unnamed Certificate'

   .. attribute:: code

      Each certificate holds a code, which might be a shortcut or
      abbreviation of the real certificate name. By default the code
      is ``NA`` (=not assigned):

        >>> mycertificate.code
        u'NA'


   .. attribute:: study_mode

      Each :class:`Certificate` instance has a study mode:

        >>> print mycertificate.study_mode
        None

      .. XXX: This is not a proper description

   .. attribute:: start_level

      Each :class:`Certificate` instance has a start level:

        >>> print mycertificate.start_level
        None

      .. XXX: This is not a proper description

   .. attribute:: end_level

      Each :class:`Certificate` instance has a end level:

        >>> print mycertificate.end_level
        None

      .. XXX: This is not a proper description
   

   .. attribute:: application_category

      Each :class:`Certificate` instance has an application category:

        >>> print mycertificate.application_category
        None

      .. XXX: This is not a proper description

   .. method:: addCertCourse(course[, level=100,[ mandatory=True]])

      Add a certificate course. A course is an object implementing
      :class:`waeup.kofa.interfaces.ICourse`.

      Please don't be confused by the term 'certificate course'.
      As course objects will normaly be  stored
      in a department, the certificate course refers to
      the 'real' course in the department container.

   .. method:: delCertCourses(code)

      Remove a certificate course from a certificate.

      The certificate course must be given by its code number.

:class:`CertificateCourse`
--------------------------

.. class:: CertificateCourse(course[, level=100[, mandatory=True]])

   Create a certificate course.

   A certificate course are held in
   certificates and refer to an existing :class:`Course` instance held
   elsewhere.

   A certificate can require several certificate courses and one
   certificate course can be required by several certificates.

   .. attribute:: course

      An instance of :class:`ICourse`.

   .. attribute:: level

      An integer telling the level to which this course applies.

   .. attribute:: mandatory

      A bool stating whether this course is required or optional to
      get the certificate.



Utilities
=========

:class:`CertificateFactory`
---------------------------

.. class:: CertificateFactory()

   .. attribute:: grok.name(u'waeup.Certificate')

   .. attribute:: grok.implements(IFactory)

   A named utility to deliver new instances of :class:`Certificate`
   without the need to import the implementation before:

     >>> from zope.component import createObject
     >>> mycertificate = createObject(u'waeup.Certificate')
     >>> mycertificate
     <waeup.kofa.university.certificate.Certificate object at 0x...>

   The factory complies with the specifications from the
   :class:`IFactory` insterface:

     >>> from zope.interface.verify import verifyClass
     >>> from zope.component.interfaces import IFactory
     >>> from waeup.kofa.university.certificate import CertificateFactory
     >>> verifyClass(IFactory, CertificateFactory)
     True

   This means also, that we can get the interfaces of the created
   object from the factory:

     >>> certificate_factory = CertificateFactory()
     >>> certificate_factory.getInterfaces()
     <implementedBy waeup.kofa.university.certificate.Certificate>


:class:`CertificateCourseFactory`
---------------------------------

.. class:: CertificateCourseFactory()

   .. attribute:: grok.name(u'waeup.CertificateCourse')

   .. attribute:: grok.implements(IFactory)

   A named utility to deliver new instances of :class:`CertificateCourse`
   without the need to import the implementation before:

     >>> from zope.component import createObject
     >>> mycertificatecourse = createObject(u'waeup.CertificateCourse')
     >>> mycertificatecourse
     <waeup.kofa.university.certificate.CertificateCourse object at 0x...>

   The factory complies with the specifications from the
   :class:`IFactory` insterface:

     >>> from zope.interface.verify import verifyClass
     >>> from zope.component.interfaces import IFactory
     >>> from waeup.kofa.university.certificate import CertificateCourseFactory
     >>> verifyClass(IFactory, CertificateCourseFactory)
     True

   This means also, that we can get the interfaces of the created
   object from the factory:

     >>> certcourse_factory = CertificateCourseFactory()
     >>> certcourse_factory.getInterfaces()
     <implementedBy waeup.kofa.university.certificate.CertificateCourse>


Examples
========

Certificates
------------

We can create certificates:

    >>> from waeup.kofa.university.certificate import Certificate
    >>> mycertificate = Certificate()
    >>> mycertificate
    <waeup.kofa.university.certificate.Certificate object at 0x...>

Another way to create certificates is by asking for a factory called
``waeup.Certificate``. This way we can create a factory without
importing a class:

    >>> from zope.component import createObject
    >>> mycertificate = createObject(u'waeup.Certificate')
    >>> mycertificate
    <waeup.kofa.university.certificate.Certificate object at 0x...>

Certificate Courses
-------------------

:class:`CertificateCourse` instances comply with the
:class:`ICertificateCourse` interface:

    >>> from waeup.kofa.university.interfaces import ICertificateCourse
    >>> from waeup.kofa.university.certificate import CertificateCourse
    >>> mycertcourse = CertificateCourse(None, 200, False)
    >>> ICertificateCourse.providedBy(mycertcourse)
    True

    >>> from zope.interface.verify import verifyObject
    >>> verifyObject(ICertificateCourse, mycertcourse)
    True

Also instances of :class:`CertificateCourse` can be created by asking
the component architechture:

    >>> from zope.component import createObject
    >>> mycertcourse = createObject(u'waeup.CertificateCourse')
    >>> mycertcourse
    <waeup.kofa.university.certificate.CertificateCourse object at 0x...>