# -*- coding: utf-8
# $Id$

# Copyright 2001, 2002 by IVA Team and contributors
#
# This file is part of IVA.
#
# IVA 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.
#
# IVA 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 IVA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Contains class CourseManager, which acts as a factory object for Courses and also the container for the courses."""

__version__ = '$Revision$'[11:-2]

import re, string, time
import strptime
import OFS, Globals, AccessControl
from Products.BTreeFolder2.BTreeFolder2 import BTreeFolder2
from Globals import Persistent, PersistentMapping
import types

from Products.ZCatalog.ZCatalog import ZCatalog

# from TraversableWrapper import TraversableWrapper as TW
from TraversableWrapper import Traversable
from Course import Course
from common import quote_html_hack, make_action
from common import perm_view, perm_edit, perm_manage, perm_add_lo, perm_access,\
     roles_admin, roles_staff, roles_user, translate
from input_checks import is_valid_title
from Thread import Thread
from AccessControl import ClassSecurityInfo
from Cruft import Cruft

from common import course_level_roles
from common import roles_teacher, roles_tutor, roles_student
import time

from zope.interface import implements
from interfaces import ICourseManager, IStatistics, IUserManager
from zope.component import adapter, getUtility
from zope.app.container.interfaces import IObjectAddedEvent
import transaction

class IDManager(Thread):
    security = ClassSecurityInfo()

    def __init__(self):
        self.__id_counter = 0L
    # Overrides generate_id from Thread!

    security.declarePrivate('generate_id')
    def generate_id(self):
        """Return a probably random integer."""
        self.__id_counter += 1L
        return str(self.__id_counter)

# CourseManager exists in FLE/courses and contains all the courses
# that the FLE installation holds.
class CourseManager(
    BTreeFolder2,
    Traversable,
    Cruft,
    Persistent,
    AccessControl.Role.RoleManager,
    OFS.SimpleItem.Item,
    IDManager,
    ):
    """FLE Coursemanager."""
    meta_type = 'CourseManager'

    implements(ICourseManager)

    security = ClassSecurityInfo()
    security.declareObjectPublic()

    # No additional comments.
    def __init__(self, id):
        """Construct Course manager object."""
        self.id = id
        BTreeFolder2.__init__(self, id)
        self.title = ''
        self.cCategories = PersistentMapping()
        self.cCategories['groups'] = {}

        IDManager.__init__(self)

        catalog = ZCatalog('catalog_notes', 'ZCatalog for notes')

        # indexes
        catalog.addIndex('get_subject', 'TextIndex')
        catalog.addIndex('get_body', 'TextIndex')
        catalog.addIndex('get_author', 'FieldIndex')
        catalog.addIndex('get_tt_id', 'FieldIndex')

        # metadata
        catalog.addColumn('get_subject')
        catalog.addColumn('get_author')
        catalog.addColumn('absolute_url')

        self._setObject('catalog_notes', catalog)
        self._p_changed = 1

        # ZCatalog for indexing courses.

        catalog = ZCatalog('courses_zcatalog', 'ZCatalog for courses')

        # indexes
        catalog.addIndex('get_courseID','FieldIndex')
        catalog.addIndex('getCourseCategory','FieldIndex')
        catalog.addIndex('getStatus','FieldIndex')
        catalog.addIndex('getRegStatus','FieldIndex')
        catalog.addIndex('get_all_users_id','KeywordIndex')
        catalog.addIndex('get_end_date','FieldIndex')           # XXX: Date index here maybe
        catalog.addIndex('get_start_date','FieldIndex')         # XXX: haven't tested it yet
        catalog.addIndex('get_n_artefacts','FieldIndex')        # XXX: after adding artefact
        catalog.addIndex('get_n_notes','FieldIndex')            # XXX: or note we need to reindex course
        catalog.addIndex('get_n_users','FieldIndex')
        catalog.addIndex('get_name','FieldIndex')
        catalog.addIndex('get_teachers','FieldIndex')
        catalog.addIndex('isLocked', 'FieldIndex')
        catalog.addIndex('lastActive','FieldIndex')     # XXX: should be fetch from somewhere else...
        catalog.addIndex('lastModify','FieldIndex')     # XXX
        catalog.addIndex('meta_type','FieldIndex')
        catalog.addIndex('getUniqId', 'FieldIndex')

        # metadata
        catalog.addColumn('getCourseCategory')
        catalog.addColumn('getLogoURL')
        catalog.addColumn('getStatus')
        catalog.addColumn('getSubgroupList')
        catalog.addColumn('getRegStatus')
        catalog.addColumn('get_all_users_id')
        catalog.addColumn('get_courseID')
        catalog.addColumn('get_end_date')
        catalog.addColumn('get_id')
        catalog.addColumn('get_n_artefacts')
        catalog.addColumn('get_n_notes')
        catalog.addColumn('get_n_users')
        catalog.addColumn('get_name')
        catalog.addColumn('get_start_date')
        catalog.addColumn('get_teachers')
        catalog.addColumn('isLocked')
        catalog.addColumn('lastActive')
        catalog.addColumn('lastModify')
        catalog.addColumn('meta_type')
        catalog.addColumn('getLogoThumbnailURL')

        self._setObject('courses_zcatalog', catalog)
        self._p_changed = 1

    def _setupZWikipermissions(self):
        try:
                self.manage_permission('Zwiki: Add pages', ('Teacher','Owner','User'), 0)
                self.manage_permission('Zwiki: Add wikis', ('Teacher','Owner','User'), 0)
                self.manage_permission('Zwiki: Change page types', ('Teacher','Owner','User'), 0)
                self.manage_permission('Zwiki: Delete pages', ('Teacher','Owner','User'), 0)
                self.manage_permission('Zwiki: Edit pages', ('Teacher','Owner','User'), 0)
                self.manage_permission('Zwiki: Rename pages', ('Teacher','Owner','User'), 0)
                self.manage_permission('Zwiki: Reparent pages', ('Teacher','Owner','User'), 0)
        except ValueError:
                # we don't have zwiki around
                pass
    
    def hasLogo(self):
        return 0

    security.declareProtected(perm_add_lo, 'add_course_impl')
    def add_course_impl(self, teacher, uniq_id=None):
        """Implementation for add_course."""
        if uniq_id is None:
                suffix = '_'+str(int(time.time()))
                uniq_id = self.generateId(prefix='course',suffix=suffix,rand_ceiling=99999999999)
        obj = Course(
            self,
            '', # name
            ('',),
            '', # desc
            '', # organisation
            '', # methods
            '', # starting_date
            '', # ending_date
            uniq_id, # uniq_id
            )
        cid = obj.id
        self.acl_users.groups.manage_addGroup(cid, '', '')
        self.acl_users.groups.manage_addGroup(cid+'_teachers', '', '')
        self._setObject(cid, obj)
        nc = getattr(self, cid)
        if teacher.strip():
            nc.add_teachers((teacher,))
        return cid

    security.declareProtected(perm_manage, 'add_course_form_handler')
    def add_course_form_handler(
        self,
        REQUEST,
        course_id, my_name, desc, organisation, methods,
        start_date, end_date,
        creating_new_course='',
        do_groupfolder='1',
        cancel='', # submit buttons
        add='',    #
        tekst='',
        logo_upload=None,
        staatus=0,
        regStatus=0,
        cCat = 0,
        credits='',
        courseID=''
        ):
        """Check user input data. this is for creating courses only for now."""
#        return str(self.REQUEST.AUTHENTICATED_USER.getUserName())
        if cancel:
            # cancel button press
            if creating_new_course:
                REQUEST.RESPONSE.redirect(self.absolute_url())
            else:
                REQUEST.RESPONSE.redirect('course_info.html?course_id=%s' % course_id)
            return

        elif not add: raise 'FLE Error', 'Unknown button'
        if not creating_new_course:
                raise 'IVA Error', 'Calling add_course_form_handler without creating_new_course attribute'

        # Ok, add button pressed

        action=apply(
            make_action,
            ['manage_course_info.html'] +
            [(x, eval(x)) for x in
             ('my_name', 'desc', 'organisation', 'methods',
              'start_date', 'end_date')])
        if course_id:
            action += '&course_id=' + course_id
        else:
            action += '&creating_new_course=1'

        my_name=my_name.strip()
        if not is_valid_title(my_name):
            return self.restrictedTraverse('message_dialog_error.html')(
                self, REQUEST,
                title='Invalid name',
                message='Give valid name',
                action=action)

        if creating_new_course and my_name in [x.get_name
                                            for x in self.get_courses()]:
            return self.restrictedTraverse('message_dialog_error.html')(
                self, REQUEST,
                title='Invalid name',
                message="Name '%s' taken" % my_name,
                action=action)

        if not creating_new_course \
           and my_name != self.get_child(course_id).get_name() \
           and my_name in [x.get_name() for x in self.get_courses()]:
            return self.restrictedTraverse('message_dialog_error.html')(
                self, REQUEST,
                title='Invalid name',
                message="Name '%s' taken" % my_name,
                action=action)

        from common import convert_date # convert dates to time.time()-format

        errors = []

        if not start_date:
            starting_date = 0
        else:
            try:
                time_tuple = strptime.strptime(start_date,
                                               translate(self,'short_date_format',default="%Y-%m-%d"))
                starting_date = convert_date(str(time_tuple[2]), # day
                                             str(time_tuple[1]), # month
                                             str(time_tuple[0])) # year
            except: errors.append(translate(self,'Starting date:'),)

        if not end_date:
            ending_date = 0
        else:
            try:
                time_tuple = strptime.strptime(end_date,
                                               translate(self,'short_date_format',default="%Y-%m-%d"))
                ending_date = convert_date(str(time_tuple[2]), # day
                                           str(time_tuple[1]), # month
                                           str(time_tuple[0])) # year
            except: errors.append(translate(self,'Ending date:'),)

        organisation = organisation.strip()
        if organisation and not is_valid_title(organisation):
            errors.append(translate(self,'Organization'))

        # desc and methods are not checked because render_description() and
        # render_methods() methods in Course filter out unwanted HTML tags.

        if len(errors) > 0:
            return self.restrictedTraverse('message_dialog_error.html')(
                self, REQUEST,
                title='Invalid input',
                message=translate(self,'Invalid fields') + ": '" + \
                "' , '".join(errors) + "'",
                action=action)

        # edit an existing course
        if creating_new_course:
            # Create new course, then proceed with updating it with
            # supplied data
            teacher = ''
            course_id = self.add_course_impl(teacher)
        
        logo=None
        try:  #Opera puhul ajab puuduva pildi juures kägu    
          if len(logo_upload.filename)>0:
            logo=logo_upload.read()
          else:
            logo=None
        except:
          pass
          
        print "course_id", course_id
        course_obj = self.get_child(course_id)
        course_obj.update(
            my_name,
            desc,
            organisation,
            methods,
            starting_date,
            ending_date,
            tekst,
            logo,
            staatus,
            regStatus,
            cCat,
            credits,
            courseID
            )

        if creating_new_course:
            if do_groupfolder:
                course_obj.add_folder('CourseFolder')
        else:
            if do_groupfolder and not course_obj.has_group_folder():
                course_obj.add_folder('CourseFolder')
            # elif not do_groupfolder and course_obj.has_group_folder():
            #    course_obj._delObject('gf')

        if creating_new_course:
            self.change_course(REQUEST, course_id)
            REQUEST.RESPONSE.redirect(self.fle_url()+"/courses/"+course_id+"/manage_participants.html?pnimi=")
        else:
            REQUEST.RESPONSE.redirect(course_obj.absolute_url()+'/course_info.html')         

    #security.declareProtected(perm_edit, 'get_courses')
    security.declarePublic('get_courses')
    # No additional comments.
    def get_courses(self, REQUEST=None, **kw):
        """Return a list of Course objects in this manager."""
        doSort = 0
        doFilter = 0
        try:
            doSort = int(REQUEST.get('sortc', 0))
        except AttributeError:
            pass
        try:
            if int(REQUEST.filter):
                doFilter = int(REQUEST.filter)
        except AttributeError:
            pass
        if doSort == 1:
            return self.courses_zcatalog(meta_type='Course', sort_on='getCourseCategory')
        elif doSort == 99 and doFilter:
            return self.courses_zcatalog(meta_type='Course', getCourseCategory=doFilter, sort_on='getCourseCategory')
        elif doSort == 10:
            return self.courses_zcatalog(meta_type='Course', sort_on='getStatus')
        elif doSort == 20:
            return self.courses_zcatalog(meta_type='Course', sort_on='get_n_users')
        elif doSort == 30:
            return self.courses_zcatalog(meta_type='Course', sort_on='lastModify')
        elif doSort == 40:
            return self.courses_zcatalog(meta_type='Course', sort_on='lastActive')
        elif doSort == 50:
            return self.courses_zcatalog(meta_type='Course', sort_on='get_n_notes')
        elif doSort == 60:
            return self.courses_zcatalog(meta_type='Course', sort_on='get_n_artefacts')
        elif doFilter:
            return self.courses_zcatalog(meta_type='Course', getCourseCategory=doFilter, sort_on='getCourseCategory')
        else:
            return self.courses_zcatalog(meta_type='Course', sort_on='get_name', **kw)

    security.declareProtected(perm_edit, 'get_course_by_uniqid')
    def get_course_by_uniqid(self, uniqid):
        """ get course by uniq id """
        result = self.courses_zcatalog(meta_type='Course', getUniqId=uniqid)
        if result:
            return result[0]
        return result

    security.declareProtected(perm_manage, 'courses_form_handler')
    def courses_form_handler(
        self,
        REQUEST,
        delete='', # form submit button
        course_export='',
        course_ids=None,
        ):
        """Form handler for courses index page."""
        import types

        if int(self.kas_opetaja(REQUEST))!=1:
            if not self.fle_root().fle_users.is_power_user(REQUEST.AUTHENTICATED_USER):
                return "Access denied"
        if not course_ids:
            return self.restrictedTraverse('message_dialog_error.html')(
                self, REQUEST,
                title='No course selected',
                message='Please select a course from the course list.',
                action= self.absolute_url() )

        if delete:
            if type(course_ids) is types.StringType:
              course_ids=(course_ids,)
            return self.restrictedTraverse('message_dialog2.html')(
                self, REQUEST,
                title = 'Confirmation',
                message = translate(self, 'Are you sure you want to delete the following courses:').encode('utf-8') + ' ' + \
                    ', '.join([getattr(self, ci).get_name() for ci in course_ids]),
                handler = 'delete_courses_form_handler',
                extra_value_name = 'course_ids',
                extra_values = course_ids,
                option1_value = 'Cancel',
                option1_name = 'cancel',
                option2_value = 'Ok',
                option2_name = 'delete')

        elif course_export:
             if type(course_ids) is types.StringType:
                course_ids=(course_ids,)
             message = self.do_courses_export(course_ids)
             message = translate(self,'Exported course(s) are save to following location:')+message
             return self.restrictedTraverse("manage_courses.html")(message=message)
        else:
            # This code should never be reached.
            raise 'FLE Error', 'Unknown button'

    security.declarePrivate('do_courses_export')
    def do_courses_export(self,course_ids):
        message = ""
        for c_id in course_ids:
            course = self.get_child(c_id)
            message += '<br />' + course.iva_ims_export(teacherExporting=0)
            transaction.commit()
        return message


    # FIXME: input_checks
    security.declareProtected(perm_manage, 'delete_courses_form_handler')
    def delete_courses_form_handler(
        self,
        REQUEST,
        course_ids,
        delete='',
        cancel='',
        ):
        """Form handler that is called from message_dialog2."""
        if delete:
            for course_id in course_ids:
                #for wt in [user.get_webtop() for user in
                #           self.get_child(course_id).get_all_users()]:
                #    wt.recursive_delete_group_folder_proxy(course_id)
                [self.get_child(course_id).remove_person(user.get_uname()) for user in self.get_child(course_id).get_all_users()]

                self._delObject(course_id)
        elif cancel:
            pass
        else:
            # This code should never be reached.
            raise 'FLE Error', 'Unknown button'

        REQUEST.RESPONSE.redirect(self.absolute_url())

    security.declarePublic('has_courses')
    def has_courses(self):
        """Return boolean describing whether there is an existing course on
        the system."""
        return not not self.get_children('Course')

    def get_course_id_from_req(self, req):
        """Extract a course id from REQUEST. This is needed by
        the CourseManager.course_selection dtml method."""
        path = req.PATH_TRANSLATED
        splitter = '/'
        if splitter not in path:
            splitter = '\\'
        i = string.find(path, "courses")
        ri = string.rfind(path, "courses")
        if (i == -1) or (ri == -1):
            return None
        if (ri != i):
            # There is more than one 'courses' word in path.
            # We'll have to use the reverse one.
            i = ri
        plst = filter(lambda x:x, string.split(path[i:], splitter))
        try:
            return plst[1]
        except IndexError:
            return None

    def get_formatted_current_date(self, REQUEST):
        """Return date formatted depending on user's language."""
        return time.strftime(translate(self,'short_date_format',default="%Y-%m-%d"), time.localtime())

    def get_printable_starting_date(self, REQUEST):
        """ return current time, no starting time for coursemanager """
        return self.get_formatted_current_date(REQUEST)

    def get_printable_ending_date(self, REQUEST):
        """ return current time, no ending time fot coursemanaget.
            this is here for course adding page """
        return self.get_formatted_current_date(REQUEST)

#    security.declareProtected(perm_view, 'user_course_export')
    security.declarePublic('user_course_export')
    def user_course_export(self,REQUEST):
        """ user exports its course for viewing offline """
        from ExportIMS import Kirjutus
        from ExportIMS import kirjutaYldM
        import tempfile, os
        uname = REQUEST.AUTHENTICATED_USER.getUserName()
        knr=self.fle_root().jooksva_kursuse_nr(self, REQUEST)
#       knr=self.fle_root().jooksva_kursuse_nr(self, REQUEST)
        knr = self.get_course_id_from_req(REQUEST)
        kasutaja = self.fle_users.get_user_info(uname)
        kasutaja = ((kasutaja),)
        failinimi = tempfile.mktemp()
        kursus = self.get_child(knr)
        k = Kirjutus(self.fle_root(), kursus.get_id()) 
        k.looKursuseFail()
        k.kirjutaWebtop(kursus.gf, tiitel='RAAMATURIIUL')
        k.kirjutavCal(kursus.syndmused, 'kursus','GROUP')
        k.kirjutaKasutajaWebtop(kasutaja)
        k.kirjutaKasutajaSyndmus(kasutaja)
#       k.kirjutaWiki(getattr(kursus,'ivawiki'))
        for sisegr in kursus.subgroups.objectValues('Subgroup'):
                sisegr_kasutajad = kursus.kasutajad_sisegrupis(sisegr.get_name())
                if uname not in sisegr_kasutajad:
                        continue
                k.kirjutaWebtop(sisegr,'SISEGRUPP')
                try:
                        k.kirjutavCal(sisegr.syndmused,sisegr.get_name(),'GROUP')
                except:
                        pass
        k.kirjutaKasutajaWiki(kasutaja)
        k.exportPajad(failinimi, str(kursus.get_name()+"/"))
        k.pakiKursusFaili(failinimi,str(kursus.get_name()))

        file = open(failinimi, "rb")
        export_data=file.read()
        file.close()
        os.remove(failinimi)
        REQUEST.RESPONSE.setHeader('content-type','application/zip')
        REQUEST.RESPONSE.setHeader('Content-disposition','attachment; filename=iva_arhiiv.zip')
        return export_data

    # XXX: Wikis are imported through that method.
    # XXX: and security is gone!
    security.declareProtected(perm_manage, 'import_form_handler')
    def import_form_handler(
        self,
        REQUEST,
        file,
        course_import='',
        testsonly='',
        wikionly='',
        cancel='',
        wiki_koht='',
        dry_run='',
        ):
        """Form handler for course importing."""
        uname = REQUEST.AUTHENTICATED_USER.getUserName()
        from StringIO import StringIO
        out = StringIO()
        if testsonly:
            raise 'IVA Error:', 'Wrong place.'
        if wikionly: 
            raise 'IVA Error:', 'Wrong place.'
        if course_import:
            from ImportIMS import Importer
            from ImportExport import Exporter
            import tempfile, os
            filename = tempfile.mktemp() 
            f = open(filename,"w+b")
            f.write(file.read())
            f.close()
            import_data=None
            imported = Importer(uname,self.fle_root(), out=out)
            imported.do_import_answers = 1
            imported.loadZip(filename)
            element = None
            try:
                element = imported.loadFile('imsmanifest.xml')
            except KeyError:
                pass
            if element is None:
                return self.restrictedTraverse('defaultRender.html')(page='Invalid ZIP-file', userLocation='Management')
            imported.processFile(self,element)
            if dry_run:
                print >> out, "<font color=\"red\">Dry run selected, transation aborted.</font>"
                transaction.abort()
            kala =  "<html><head><title>Import Course</title></head><br/>imported"
            os.remove(filename)
            return self.restrictedTraverse('defaultRender.html')(page=re.sub('\n', '<br />', out.getvalue()), userLocation='Management')
        return

    security.declareProtected(perm_manage,'import_form_handler2')
    def import_form_handler2(self,REQUEST,zip='',importB=''):
        """ imports from zip, located at zope instance's import folder """
        if not importB:
            return "x"
        if not zip:
            return "y"
        uname = str(REQUEST.AUTHENTICATED_USER)
        if importB:
            from ImportIMS import Importer
            from ImportExport import Exporter
            import os, time
            from StringIO import StringIO
            out = StringIO()
            insthome = Globals.INSTANCE_HOME
            oaeg_alg = time.time()
            for names in zip:
                zip_alg = time.time()
                try:
                    path = os.path.join(insthome,'import')
                    filename = os.path.join(path,names)
                except OSError:
                    return "z"
                
                imported = Importer(uname,self.fle_root(), out=out)
                imported.loadZip(filename)
                element = imported.loadFile('imsmanifest.xml')
                imported.processFile(self,element)
                zip_lopp = time.time()
                transaction.commit()
            oaeg_lopp = time.time()
        return self.restrictedTraverse("manage_courses.html")(message="File(s) successfully imported.")
#       return REQUEST.RESPONSE.redirect(self.fle_root().absolute_url()+'/courses/')

    def coursesOpenToRegister(self, knimi):
        """ Kursuste loetelu, kus kasutaja veel pole """
        cm=self.get_courses(getRegStatus=['1','2'])
        loetelu=[]
        for c in cm:
            leidub=0
            rm=c.getObject().get_local_roles()
            for r in rm:
                if str(knimi)==r[0]:
                    leidub=1
            if c.getObject().kasOotaja(knimi):
                leidub=1
            if not leidub:# and ((c.getStatus=='1') or (c.getObject().getStatus()=='4')):
                loetelu.append(c)
        return loetelu

    #security.declareProtected(, 'kursusteleRegistreerimiseLeht')
    def kursusteleRegistreerimiseLeht(self, REQUEST,kursus=()):
        """ Kasutajate lisamine ootele """
        import types
        if type(kursus)==types.StringType:
            kursus=(kursus,)
        for x in kursus:
            getattr(self, x).lisaOotaja(REQUEST, str(REQUEST.AUTHENTICATED_USER))
        return REQUEST.RESPONSE.redirect('../organizer_openCourses.html')

    def getStatuses(self):
        """ return course statuses """
        return range(3)

    def getPrintableStatus(self, nr):
        """ return printable course status """
        statuses = ['Preparation', 'Active', 'Finished']
        if int(nr)>2: return 'Invalid status'
        return statuses[int(nr)]

    def getRegStatuses(self):
        """ return course registration status """
        return range(3)

    def getPrintableRegStatus(self, nr):
        """ return printable registration status """
        statuses = ['by teacher', 'with teacher\'s permission', 'automatically']
        return statuses[int(nr)]

#    security.declareProtected(perm_view,'getAllCategories')
    def getAllCategories(self):
        return self.cCategories['groups'].keys()

    def getACat(self,id):
        try:
            return self.cCategories['relations'][str(id)]
        except KeyError:
            return None

#    security.declareProtected(perm_view, 'treePrinter')
    def treePrinter(self):
        """ tree printer """
        result = []
        init = self.getCatForCat()
        for x in init:
            tmp = []
            tmp.append('')
            tmp.append(x)
            result.append(tmp)
            self.treeSlave(x,'-',result)
        return result

# teachers are getting errors...
#    security.declareProtected(perm_view,'getNameForID')
    def getNameForID(self, id):
        try:
            int_id = int(id)
        except ValueError:
            int_id = 0
        if id is not None and int_id != 0:
            try:
                return self.cCategories['groups'][int(id)]['Name']
            except KeyError:
                return "deleted..."
        else:
            return ""

    def getParentForID(self, id):
        try:
                return self.cCategories['groups'][id]['Parent']
        except KeyError:
                return ''

    security.declarePrivate('addcCategory')
    def addcCategory(self, newcat, undercat):
        from random import random
        id = int(round(random()*1000000000))
        self.cCategories['groups'][id] = {'Name':newcat, 'Parent':undercat}
        try:
            self.cCategories._p_changed = 1
        except AttributeError:
            self._p_changed = 1

    security.declarePrivate('renameCategory')
    def renameCategory(self, id, newname):
        self.cCategories['groups'][int(id)]['Name'] = newname
        try:
            self.cCategories._p_changed = 1
        except AttributeError:
            self._p_changed = 1

    security.declarePrivate('removeCategory')
    def removeCategory(self, id):
        self.cCategories['groups'].pop(int(id))
        try:
            self.cCategories._p_changed=1
        except AttributeError:
            self._p_changed = 1

    security.declarePrivate('treeSlave')
    def treeSlave(self, cat, sep, result):
        for x in self.getCatForCat(cat):
            tmp = []
            tmp.append(sep)
            tmp.append(x)
            result.append(tmp)
            self.treeSlave(x,sep+'-',result)
        return result

    def getCatForCat(self,parent=''):
        #pass
        cats = []
        if parent == '': parent = 'None'
        else: parent = str(parent)
        for x in self.cCategories['groups'].keys():
            if self.cCategories['groups'][x]['Parent'] == parent:
                cats.append(x)
        return cats

    security.declareProtected(perm_manage,'manageCategories_handler')
    def manageCategories_handler(self, REQUEST, saveB='', deleteB='', deletec='', newCat='', underCat='', renameB='', renaming='', newname=''):
        """ creates or deletes course category """
        if saveB:
            if not underCat:
                underCat = 'None'
            if newCat:
                self.addcCategory(newCat, underCat)
        if deleteB:
            if type(deletec)==types.StringType: deletec=(deletec,)
            for dc in deletec:
                self.removeCategory(dc)
        if renameB and newname and renaming:
            self.renameCategory(renaming, newname)
        return REQUEST.RESPONSE.redirect(self.absolute_url()+'/manageCategories.html')

    def isCourseReady(self,course=None):
        """ if all course fields are filled """
        if not course: return 0
        #if not int(course.getStatus()) or int(course.getStatus()==3): return 0
        if not course.get_name() or not course.get_organisation() or not course.get_description() or not course.get_methods() or not course.get_start_date() or not course.get_end_date(): return 0
        return 1

    security.declareProtected(perm_manage,'ziplist')
    def ziplist(self):
        """ returns a list of importable zip-s """
        import os
        insthome = Globals.INSTANCE_HOME
        try:
            impath = os.path.join(insthome,'import')
        except OSError:
            return "no import folder found at %s" % insthome
        files = []
        for x in os.listdir(impath):
                if x[-4:].lower() == '.zip':files.append(x)
        return files

    def change_course(self, REQUEST, course_nr=None):
        """ change course """
        if not course_nr:
            return 
        um = getUtility(IUserManager, context=self)
        um = um.__of__(self.aq_parent)
        user = um.get_user_info(str(REQUEST.AUTHENTICATED_USER))
        res = user.set_jooksev_kursus(course_nr, user.get_uname())
        try:
            c = self.get_child(course_nr)
        except KeyError:
            return
        if not res:
            return 
        wt = getattr(user, 'webtop', None)
        if wt is None:
            return
        cw = getattr(wt, 'c'+course_nr, None)
        folder = None
        if cw is None:
            #wt.lisa_kursuse_kaust(REQUEST, 'c'+course_nr)
            folder = wt.add_folder('c'+course_nr, 'c'+course_nr)
            folder.set_author(str(REQUEST.AUTHENTICATED_USER))
            # TODO:XXX: check below!
            folder.manage_setLocalRoles(course_nr, ('Student',))
            folder.manage_setLocalRoles(course_nr+'_teachers', ('Teacher',))
        else:
            folder = cw
        user.check_portfolios(folder, c)
        s = getUtility(IStatistics)
        s._updateStat(REQUEST, 'numTimesEntered', int(course_nr))
        s._registerVisit(REQUEST, course_nr, 'Organizer')
        return REQUEST.RESPONSE.redirect(c.absolute_url()+'/course_index.html')

Globals.InitializeClass(CourseManager)

@adapter(ICourseManager, IObjectAddedEvent)
def added(obj, event):
    """Set default permissions for roles."""

    obj.manage_permission(perm_access, ('Manager','IVAAdmin','Student','Teacher','Anonymous'), 0)
    obj.manage_permission(perm_edit, ('Manager','IVAAdmin','Teacher'), 0)
    obj.manage_permission(perm_view, ('Manager','IVAAdmin','Teacher','Student'), 0)
    obj.manage_permission(perm_add_lo, ('Manager','IVAAdmin','Teacher'), 0)
    obj._setupZWikipermissions()

# EOF