## 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 ## """ Container for the various objects owned by students. """ import os import grok from grok import index from zope.component.interfaces import IFactory from zope.interface import implementedBy from hurry.workflow.interfaces import IWorkflowState, IWorkflowInfo from zope.securitypolicy.interfaces import IPrincipalRoleManager from waeup.sirp.interfaces import ( IObjectHistory, IUserAccount, IFileStoreNameChooser, IFileStoreHandler) from waeup.sirp.image import WAeUPImageFile from waeup.sirp.imagestorage import DefaultFileStoreHandler from waeup.sirp.students.interfaces import ( IStudent, IStudentNavigation, IStudentClearanceEdit, IStudentPersonalEdit) from waeup.sirp.students.studycourse import StudentStudyCourse from waeup.sirp.students.payments import StudentPaymentsContainer from waeup.sirp.students.accommodation import StudentAccommodation from waeup.sirp.utils.helpers import attrs_to_fields, get_current_principal from waeup.sirp.students.utils import generate_student_id class Student(grok.Container): """This is a student container for the various objects owned by students. """ grok.implements(IStudent, IStudentNavigation, IStudentPersonalEdit, IStudentClearanceEdit) grok.provides(IStudent) def __init__(self): super(Student, self).__init__() # The site doesn't exist in unit tests try: students = grok.getSite()['students'] self.student_id = generate_student_id(students,'?') except TypeError: self.student_id = u'Z654321' self.password = None return def loggerInfo(self, ob_class, comment=None): target = self.__name__ return grok.getSite()['students'].logger_info(ob_class,target,comment) @property def state(self): state = IWorkflowState(self).getState() return state @property def history(self): history = IObjectHistory(self) return history def getStudent(self): return self @property def certificate(self): cert = getattr(self.get('studycourse', None), 'certificate', None) return cert @property def current_session(self): cert = getattr(self.get('studycourse', None), 'current_session', None) return cert # Set all attributes of Student required in IStudent as field # properties. Doing this, we do not have to set initial attributes # ourselves and as a bonus we get free validation when an attribute is # set. Student = attrs_to_fields(Student) class StudentFactory(grok.GlobalUtility): """A factory for students. """ grok.implements(IFactory) grok.name(u'waeup.Student') title = u"Create a new student.", description = u"This factory instantiates new student instances." def __call__(self, *args, **kw): return Student() def getInterfaces(self): return implementedBy(Student) @grok.subscribe(IStudent, grok.IObjectAddedEvent) def handle_student_added(student, event): """If a student is added all subcontainers are automatically added and the transition create is fired. The latter produces a logging message. """ student.clearance_locked = True studycourse = StudentStudyCourse() student['studycourse'] = studycourse payments = StudentPaymentsContainer() student['payments'] = payments accommodation = StudentAccommodation() student['accommodation'] = accommodation # Assign global student role for new student account = IUserAccount(student) account.roles = ['waeup.Student'] # Assign local StudentRecordOwner role role_manager = IPrincipalRoleManager(student) role_manager.assignRoleToPrincipal( 'waeup.local.StudentRecordOwner', student.student_id) IWorkflowInfo(student).fireTransition('create') return @grok.subscribe(IStudent, grok.IObjectRemovedEvent) def handle_student_removed(student, event): """If a student is removed a message is logged. """ comment = 'Student record removed' target = student.student_id # In some tests we don't have a principal try: user = get_current_principal().id except (TypeError, AttributeError): return grok.getSite()['students'].logger.info('%s - %s - %s' % ( user, target, comment)) return #: The file id marker for student files STUDENT_FILE_STORE_NAME = 'file-student' class StudentFileNameChooser(grok.Adapter): """A file id chooser for :class:`Student` objects. `context` is an :class:`Student` instance. The :class:`StudentImageNameChooser` can build/check file ids for :class:`Student` objects suitable for use with :class:`ExtFileStore` instances. The delivered file_id contains the file id marker for :class:`Student` object and the student id of the context student. This chooser is registered as an adapter providing :class:`waeup.sirp.interfaces.IFileStoreNameChooser`. File store name choosers like this one are only convenience components to ease the task of creating file ids for student objects. You are nevertheless encouraged to use them instead of manually setting up filenames for students. .. seealso:: :mod:`waeup.sirp.imagestorage` """ grok.context(IStudent) grok.implements(IFileStoreNameChooser) def checkName(self, name=None, attr=None): """Check whether the given name is a valid file id for the context. Returns ``True`` only if `name` equals the result of :meth:`chooseName`. """ return name == self.chooseName() def chooseName(self, attr, name=None): """Get a valid file id for student context. *Example:* For a student with student id ``'A123456'`` and with attr ``'nice_image.jpeg'`` stored in the students container this chooser would create: ``'__file-student__students/A/A123456/nice_image_A123456.jpeg'`` meaning that the nice image of this applicant would be stored in the site-wide file storage in path: ``students/A/A123456/nice_image_A123456.jpeg`` """ basename, ext = os.path.splitext(attr) stud_id = self.context.student_id marked_filename = '__%s__%s/%s/%s_%s%s' % ( STUDENT_FILE_STORE_NAME, stud_id[0], stud_id, basename, stud_id, ext) return marked_filename class StudentFileStoreHandler(DefaultFileStoreHandler, grok.GlobalUtility): """Student specific file handling. This handler knows in which path in a filestore to store student files and how to turn this kind of data into some (browsable) file object. It is called from the global file storage, when it wants to get/store a file with a file id starting with ``__file-student__`` (the marker string for student files). Like each other file store handler it does not handle the files really (this is done by the global file store) but only computes paths and things like this. """ grok.implements(IFileStoreHandler) grok.name(STUDENT_FILE_STORE_NAME) def pathFromFileID(self, store, root, file_id): """All student files are put in directory ``students``. """ marker, filename, basename, ext = store.extractMarker(file_id) sub_root = os.path.join(root, 'students') return super(StudentFileStoreHandler, self).pathFromFileID( store, sub_root, basename) def createFile(self, store, root, filename, file_id, file): """Create a browsable file-like object. """ ext = os.path.splitext(filename)[1].lower() # call super method to ensure that any old files with # different filename extension are deleted. file, path, file_obj = super( StudentFileStoreHandler, self).createFile( store, root, filename, file_id, file) return file, path, WAeUPImageFile( file_obj.filename, file_obj.data)