source: main/waeup.kofa/trunk/src/waeup/kofa/students/batching.py @ 10437

Last change on this file since 10437 was 10276, checked in by Henrik Bettermann, 12 years ago

Remove gpa field. The GPA must not be an attribute of the level. It contains also information on carry over courses of following levels. Thus it can only be reliably calculated at the end of a study course, e.g. in transcripts.
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1## $Id: batching.py 10276 2013-06-05 08:02:29Z henrik $
2##
3## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
4## This program is free software; you can redistribute it and/or modify
5## it under the terms of the GNU General Public License as published by
6## the Free Software Foundation; either version 2 of the License, or
7## (at your option) any later version.
8##
9## This program is distributed in the hope that it will be useful,
10## but WITHOUT ANY WARRANTY; without even the implied warranty of
11## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12## GNU General Public License for more details.
13##
14## You should have received a copy of the GNU General Public License
15## along with this program; if not, write to the Free Software
16## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17##
18"""Batch processing components for student objects.
19
20Batch processors eat CSV files to add, update or remove large numbers
21of certain kinds of objects at once.
22
23Here we define the processors for students specific objects like
24students, studycourses, payment tickets and accommodation tickets.
25"""
26import grok
27import unicodecsv as csv # XXX: csv ops should move to dedicated module.
28from time import time
29from datetime import datetime
30from zope.i18n import translate
31from zope.interface import Interface
32from zope.schema import getFields
33from zope.component import queryUtility, getUtility, createObject
34from zope.event import notify
35from zope.catalog.interfaces import ICatalog
36from hurry.workflow.interfaces import IWorkflowState, IWorkflowInfo
37from waeup.kofa.interfaces import (
38    IBatchProcessor, FatalCSVError, IObjectConverter, IUserAccount,
39    IObjectHistory, VALIDATED, REGISTERED, IGNORE_MARKER)
40from waeup.kofa.interfaces import IKofaUtils
41from waeup.kofa.interfaces import MessageFactory as _
42from waeup.kofa.students.interfaces import (
43    IStudent, IStudentStudyCourse, IStudentStudyCourseTransfer,
44    IStudentUpdateByRegNo, IStudentUpdateByMatricNo,
45    IStudentStudyLevel, ICourseTicketImport,
46    IStudentOnlinePayment, IStudentVerdictUpdate)
47from waeup.kofa.students.workflow import  (
48    IMPORTABLE_STATES, IMPORTABLE_TRANSITIONS,
49    FORBIDDEN_POSTGRAD_TRANS, FORBIDDEN_POSTGRAD_STATES)
50from waeup.kofa.utils.batching import BatchProcessor
51
52class StudentProcessor(BatchProcessor):
53    """A batch processor for IStudent objects.
54    """
55    grok.implements(IBatchProcessor)
56    grok.provides(IBatchProcessor)
57    grok.context(Interface)
58    util_name = 'studentprocessor'
59    grok.name(util_name)
60
61    name = u'Student Processor'
62    iface = IStudent
63    iface_byregnumber = IStudentUpdateByRegNo
64    iface_bymatricnumber = IStudentUpdateByMatricNo
65
66    location_fields = []
67    factory_name = 'waeup.Student'
68
69    @property
70    def available_fields(self):
71        fields = getFields(self.iface)
72        return sorted(list(set(
73            ['student_id','reg_number','matric_number',
74            'password', 'state', 'transition'] + fields.keys())))
75
76    def checkHeaders(self, headerfields, mode='create'):
77        if 'state' in headerfields and 'transition' in headerfields:
78            raise FatalCSVError(
79                "State and transition can't be  imported at the same time!")
80        if not 'reg_number' in headerfields and not 'student_id' \
81            in headerfields and not 'matric_number' in headerfields:
82            raise FatalCSVError(
83                "Need at least columns student_id or reg_number " +
84                "or matric_number for import!")
85        if mode == 'create':
86            for field in self.required_fields:
87                if not field in headerfields:
88                    raise FatalCSVError(
89                        "Need at least columns %s for import!" %
90                        ', '.join(["'%s'" % x for x in self.required_fields]))
91        # Check for fields to be ignored...
92        not_ignored_fields = [x for x in headerfields
93                              if not x.startswith('--')]
94        if len(set(not_ignored_fields)) < len(not_ignored_fields):
95            raise FatalCSVError(
96                "Double headers: each column name may only appear once.")
97        return True
98
99    def parentsExist(self, row, site):
100        return 'students' in site.keys()
101
102    def getLocator(self, row):
103        if row.get('student_id',None) not in (None, IGNORE_MARKER):
104            return 'student_id'
105        elif row.get('reg_number',None) not in (None, IGNORE_MARKER):
106            return 'reg_number'
107        elif row.get('matric_number',None) not in (None, IGNORE_MARKER):
108            return 'matric_number'
109        else:
110            return None
111
112    # The entry never exists in create mode.
113    def entryExists(self, row, site):
114        return self.getEntry(row, site) is not None
115
116    def getParent(self, row, site):
117        return site['students']
118
119    def getEntry(self, row, site):
120        if not 'students' in site.keys():
121            return None
122        if self.getLocator(row) == 'student_id':
123            if row['student_id'] in site['students']:
124                student = site['students'][row['student_id']]
125                return student
126        elif self.getLocator(row) == 'reg_number':
127            reg_number = row['reg_number']
128            cat = queryUtility(ICatalog, name='students_catalog')
129            results = list(
130                cat.searchResults(reg_number=(reg_number, reg_number)))
131            if results:
132                return results[0]
133        elif self.getLocator(row) == 'matric_number':
134            matric_number = row['matric_number']
135            cat = queryUtility(ICatalog, name='students_catalog')
136            results = list(
137                cat.searchResults(matric_number=(matric_number, matric_number)))
138            if results:
139                return results[0]
140        return None
141
142    def addEntry(self, obj, row, site):
143        parent = self.getParent(row, site)
144        parent.addStudent(obj)
145        # Reset _curr_stud_id if student_id has been imported
146        if self.getLocator(row) == 'student_id':
147            parent._curr_stud_id -= 1
148        # We have to log this if state is provided. If not,
149        # logging is done by the event handler handle_student_added
150        if 'state' in row:
151            parent.logger.info('%s - Student record created' % obj.student_id)
152        history = IObjectHistory(obj)
153        history.addMessage(_('Student record created'))
154        return
155
156    def delEntry(self, row, site):
157        student = self.getEntry(row, site)
158        if student is not None:
159            parent = self.getParent(row, site)
160            parent.logger.info('%s - Student removed' % student.student_id)
161            del parent[student.student_id]
162        pass
163
164    def checkUpdateRequirements(self, obj, row, site):
165        """Checks requirements the object must fulfill when being updated.
166
167        This method is not used in case of deleting or adding objects.
168
169        Returns error messages as strings in case of requirement
170        problems.
171        """
172        transition = row.get('transition', IGNORE_MARKER)
173        if transition not in (IGNORE_MARKER, ''):
174            allowed_transitions = IWorkflowInfo(obj).getManualTransitionIds()
175            if transition not in allowed_transitions:
176                return 'Transition not allowed.'
177            if transition in FORBIDDEN_POSTGRAD_TRANS and \
178                obj.is_postgrad:
179                return 'Transition not allowed (pg student).'
180        state = row.get('state', IGNORE_MARKER)
181        if state not in (IGNORE_MARKER, ''):
182            if state in FORBIDDEN_POSTGRAD_STATES and \
183                obj.is_postgrad:
184                return 'State not allowed (pg student).'
185        return None
186
187    def updateEntry(self, obj, row, site, filename):
188        """Update obj to the values given in row.
189        """
190        items_changed = ''
191
192        # Remove student_id from row if empty
193        if 'student_id' in row and row['student_id'] in (None, IGNORE_MARKER):
194            row.pop('student_id')
195
196        # Update password
197        # XXX: Take DELETION_MARKER into consideration
198        if 'password' in row:
199            passwd = row.get('password', IGNORE_MARKER)
200            if passwd not in ('', IGNORE_MARKER):
201                if passwd.startswith('{SSHA}'):
202                    # already encrypted password
203                    obj.password = passwd
204                else:
205                    # not yet encrypted password
206                    IUserAccount(obj).setPassword(passwd)
207                items_changed += ('%s=%s, ' % ('password', passwd))
208            row.pop('password')
209
210        # Update registration state
211        if 'state' in row:
212            state = row.get('state', IGNORE_MARKER)
213            if state not in (IGNORE_MARKER, ''):
214                value = row['state']
215                IWorkflowState(obj).setState(value)
216                msg = _("State '${a}' set", mapping = {'a':value})
217                history = IObjectHistory(obj)
218                history.addMessage(msg)
219                items_changed += ('%s=%s, ' % ('state', state))
220            row.pop('state')
221
222        if 'transition' in row:
223            transition = row.get('transition', IGNORE_MARKER)
224            if transition not in (IGNORE_MARKER, ''):
225                value = row['transition']
226                IWorkflowInfo(obj).fireTransition(value)
227                items_changed += ('%s=%s, ' % ('transition', transition))
228            row.pop('transition')
229
230        # apply other values...
231        items_changed += super(StudentProcessor, self).updateEntry(
232            obj, row, site, filename)
233
234        # Log actions...
235        parent = self.getParent(row, site)
236        if hasattr(obj,'student_id'):
237            # Update mode: the student exists and we can get the student_id.
238            # Create mode: the record contains the student_id
239            parent.logger.info(
240                '%s - %s - %s - updated: %s'
241                % (self.name, filename, obj.student_id, items_changed))
242        else:
243            # Create mode: the student does not yet exist
244            # XXX: It seems that this never happens because student_id
245            # is always set.
246            parent.logger.info(
247                '%s - %s - %s - imported: %s'
248                % (self.name, filename, obj.student_id, items_changed))
249        return items_changed
250
251    def getMapping(self, path, headerfields, mode):
252        """Get a mapping from CSV file headerfields to actually used fieldnames.
253        """
254        result = dict()
255        reader = csv.reader(open(path, 'rb'))
256        raw_header = reader.next()
257        for num, field in enumerate(headerfields):
258            if field not in ['student_id', 'reg_number', 'matric_number'
259                             ] and mode == 'remove':
260                continue
261            if field == u'--IGNORE--':
262                # Skip ignored columns in failed and finished data files.
263                continue
264            result[raw_header[num]] = field
265        return result
266
267    def checkConversion(self, row, mode='create'):
268        """Validates all values in row.
269        """
270        iface = self.iface
271        if mode in ['update', 'remove']:
272            if self.getLocator(row) == 'reg_number':
273                iface = self.iface_byregnumber
274            elif self.getLocator(row) == 'matric_number':
275                iface = self.iface_bymatricnumber
276        converter = IObjectConverter(iface)
277        errs, inv_errs, conv_dict =  converter.fromStringDict(
278            row, self.factory_name, mode=mode)
279        if 'transition' in row:
280            if row['transition'] not in IMPORTABLE_TRANSITIONS:
281                if row['transition'] not in (IGNORE_MARKER, ''):
282                    errs.append(('transition','not allowed'))
283        if 'state' in row:
284            if row['state'] not in IMPORTABLE_STATES:
285                if row['state'] not in (IGNORE_MARKER, ''):
286                    errs.append(('state','not allowed'))
287                else:
288                    # State is an attribute of Student and must not
289                    # be changed if empty.
290                    conv_dict['state'] = IGNORE_MARKER
291        try:
292            # Correct stud_id counter. As the IConverter for students
293            # creates student objects that are not used afterwards, we
294            # have to fix the site-wide student_id counter.
295            site = grok.getSite()
296            students = site['students']
297            students._curr_stud_id -= 1
298        except (KeyError, TypeError, AttributeError):
299                pass
300        return errs, inv_errs, conv_dict
301
302
303class StudentProcessorBase(BatchProcessor):
304    """A base for student subitem processor.
305
306    Helps reducing redundancy.
307    """
308    grok.baseclass()
309
310    # additional available fields
311    # beside 'student_id', 'reg_number' and 'matric_number'
312    additional_fields = []
313
314    #: header fields additionally required
315    additional_headers = []
316
317    @property
318    def available_fields(self):
319        fields = ['student_id','reg_number','matric_number'
320                  ] + self.additional_fields
321        return sorted(list(set(fields + getFields(
322                self.iface).keys())))
323
324    def checkHeaders(self, headerfields, mode='ignore'):
325        if not 'reg_number' in headerfields and not 'student_id' \
326            in headerfields and not 'matric_number' in headerfields:
327            raise FatalCSVError(
328                "Need at least columns student_id " +
329                "or reg_number or matric_number for import!")
330        for name in self.additional_headers:
331            if not name in headerfields:
332                raise FatalCSVError(
333                    "Need %s for import!" % name)
334
335        # Check for fields to be ignored...
336        not_ignored_fields = [x for x in headerfields
337                              if not x.startswith('--')]
338        if len(set(not_ignored_fields)) < len(not_ignored_fields):
339            raise FatalCSVError(
340                "Double headers: each column name may only appear once.")
341        return True
342
343    def _getStudent(self, row, site):
344        NON_VALUES = ['', IGNORE_MARKER]
345        if not 'students' in site.keys():
346            return None
347        if row.get('student_id', '') not in NON_VALUES:
348            if row['student_id'] in site['students']:
349                student = site['students'][row['student_id']]
350                return student
351        elif row.get('reg_number', '') not in NON_VALUES:
352            reg_number = row['reg_number']
353            cat = queryUtility(ICatalog, name='students_catalog')
354            results = list(
355                cat.searchResults(reg_number=(reg_number, reg_number)))
356            if results:
357                return results[0]
358        elif row.get('matric_number', '') not in NON_VALUES:
359            matric_number = row['matric_number']
360            cat = queryUtility(ICatalog, name='students_catalog')
361            results = list(
362                cat.searchResults(matric_number=(matric_number, matric_number)))
363            if results:
364                return results[0]
365        return None
366
367    def parentsExist(self, row, site):
368        return self.getParent(row, site) is not None
369
370    def entryExists(self, row, site):
371        return self.getEntry(row, site) is not None
372
373    def checkConversion(self, row, mode='ignore'):
374        """Validates all values in row.
375        """
376        converter = IObjectConverter(self.iface)
377        errs, inv_errs, conv_dict =  converter.fromStringDict(
378            row, self.factory_name, mode=mode)
379        return errs, inv_errs, conv_dict
380
381    def getMapping(self, path, headerfields, mode):
382        """Get a mapping from CSV file headerfields to actually used fieldnames.
383        """
384        result = dict()
385        reader = csv.reader(open(path, 'rb'))
386        raw_header = reader.next()
387        for num, field in enumerate(headerfields):
388            if field not in ['student_id', 'reg_number', 'matric_number',
389                             'p_id', 'code', 'level'
390                             ] and mode == 'remove':
391                continue
392            if field == u'--IGNORE--':
393                # Skip ignored columns in failed and finished data files.
394                continue
395            result[raw_header[num]] = field
396        return result
397
398
399class StudentStudyCourseProcessor(StudentProcessorBase):
400    """A batch processor for IStudentStudyCourse objects.
401    """
402    grok.implements(IBatchProcessor)
403    grok.provides(IBatchProcessor)
404    grok.context(Interface)
405    util_name = 'studycourseupdater'
406    grok.name(util_name)
407
408    name = u'StudentStudyCourse Processor (update only)'
409    iface = IStudentStudyCourse
410    iface_transfer = IStudentStudyCourseTransfer
411    factory_name = 'waeup.StudentStudyCourse'
412
413    location_fields = []
414    additional_fields = []
415
416    def getParent(self, row, site):
417        return self._getStudent(row, site)
418
419    def getEntry(self, row, site):
420        student = self.getParent(row, site)
421        if student is None:
422            return None
423        return student.get('studycourse')
424
425    def updateEntry(self, obj, row, site, filename):
426        """Update obj to the values given in row.
427        """
428        entry_mode = row.get('entry_mode', None)
429        certificate = row.get('certificate', None)
430        current_session = row.get('current_session', None)
431        student = self.getParent(row, site)
432        if entry_mode == 'transfer':
433            # We do not expect any error here since we
434            # checked all constraints in checkConversion and
435            # in checkUpdateRequirements
436            student.transfer(
437                certificate=certificate, current_session=current_session)
438            obj = student['studycourse']
439        items_changed = super(StudentStudyCourseProcessor, self).updateEntry(
440            obj, row, site, filename)
441        student.__parent__.logger.info(
442            '%s - %s - %s - updated: %s'
443            % (self.name, filename, student.student_id, items_changed))
444        # Update the students_catalog
445        notify(grok.ObjectModifiedEvent(student))
446        return
447
448    def checkConversion(self, row, mode='ignore'):
449        """Validates all values in row.
450        """
451        # We have to use the correct interface. Transfer
452        # updates have different constraints.
453        entry_mode = row.get('entry_mode', None)
454        if entry_mode == 'transfer':
455            converter = IObjectConverter(self.iface_transfer)
456        else:
457            converter = IObjectConverter(self.iface)
458        errs, inv_errs, conv_dict =  converter.fromStringDict(
459            row, self.factory_name, mode=mode)
460
461        # We have to check if current_level is in range of certificate.
462        if 'certificate' in conv_dict and 'current_level' in conv_dict:
463            cert = conv_dict['certificate']
464            level = conv_dict['current_level']
465            if level < cert.start_level or level > cert.end_level+120:
466                errs.append(('current_level','not in range'))
467        return errs, inv_errs, conv_dict
468
469    def checkUpdateRequirements(self, obj, row, site):
470        """Checks requirements the object must fulfill when being updated.
471
472        Returns error messages as strings in case of requirement
473        problems.
474        """
475        certificate = getattr(obj, 'certificate', None)
476        entry_session = getattr(obj, 'entry_session', None)
477        current_level = row.get('current_level', None)
478        entry_mode = row.get('entry_mode', None)
479        # We have to ensure that the student can be transferred.
480        if entry_mode == 'transfer':
481            if certificate is None or entry_session is None:
482                return 'Former study course record incomplete.'
483            if 'studycourse_1' in obj.__parent__.keys() and \
484                'studycourse_2' in obj.__parent__.keys():
485                return 'Maximum number of transfers exceeded.'
486        if current_level:
487            if current_level == 999 and \
488                obj.__parent__.state in FORBIDDEN_POSTGRAD_STATES:
489                return 'Not a pg student.'
490            cert = row.get('certificate', None)
491            if certificate is None and cert is None:
492                return 'No certificate to check level.'
493            if certificate is not None and cert is None and (
494                current_level < certificate.start_level or \
495                current_level > certificate.end_level+120):
496                return 'current_level not in range.'
497        return None
498
499class StudentStudyLevelProcessor(StudentProcessorBase):
500    """A batch processor for IStudentStudyLevel objects.
501    """
502    grok.implements(IBatchProcessor)
503    grok.provides(IBatchProcessor)
504    grok.context(Interface)
505    util_name = 'studylevelprocessor'
506    grok.name(util_name)
507
508    name = u'StudentStudyLevel Processor'
509    iface = IStudentStudyLevel
510    factory_name = 'waeup.StudentStudyLevel'
511
512    location_fields = []
513
514    additional_fields = ['level']
515    additional_headers = ['level']
516
517    @property
518    def available_fields(self):
519        fields = super(StudentStudyLevelProcessor, self).available_fields
520        fields.remove('total_credits')
521        return  fields
522
523    def getParent(self, row, site):
524        student = self._getStudent(row, site)
525        if student is None:
526            return None
527        return student['studycourse']
528
529    def getEntry(self, row, site):
530        studycourse = self.getParent(row, site)
531        if studycourse is None:
532            return None
533        return studycourse.get(row['level'])
534
535    def delEntry(self, row, site):
536        studylevel = self.getEntry(row, site)
537        parent = self.getParent(row, site)
538        if studylevel is not None:
539            student = self._getStudent(row, site)
540            student.__parent__.logger.info('%s - Level removed: %s'
541                % (student.student_id, studylevel.__name__))
542            del parent[studylevel.__name__]
543        return
544
545    def updateEntry(self, obj, row, site, filename):
546        """Update obj to the values given in row.
547        """
548        items_changed = super(StudentStudyLevelProcessor, self).updateEntry(
549            obj, row, site, filename)
550        obj.level = int(row['level'])
551        student = self.getParent(row, site).__parent__
552        student.__parent__.logger.info(
553            '%s - %s - %s - updated: %s'
554            % (self.name, filename, student.student_id, items_changed))
555        return
556
557    def addEntry(self, obj, row, site):
558        parent = self.getParent(row, site)
559        obj.level = int(row['level'])
560        parent[row['level']] = obj
561        return
562
563    def checkConversion(self, row, mode='ignore'):
564        """Validates all values in row.
565        """
566        errs, inv_errs, conv_dict = super(
567            StudentStudyLevelProcessor, self).checkConversion(row, mode=mode)
568
569        # We have to check if level is a valid integer.
570        # This is not done by the converter.
571        try:
572            level = int(row['level'])
573            if level not in range(0,1000,10) + [999]:
574                errs.append(('level','no valid integer'))
575        except ValueError:
576            errs.append(('level','no integer'))
577        return errs, inv_errs, conv_dict
578
579class CourseTicketProcessor(StudentProcessorBase):
580    """A batch processor for ICourseTicket objects.
581    """
582    grok.implements(IBatchProcessor)
583    grok.provides(IBatchProcessor)
584    grok.context(Interface)
585    util_name = 'courseticketprocessor'
586    grok.name(util_name)
587
588    name = u'CourseTicket Processor'
589    iface = ICourseTicketImport
590    factory_name = 'waeup.CourseTicket'
591
592    location_fields = []
593    additional_fields = ['level', 'code']
594    additional_headers = ['level', 'code']
595
596    @property
597    def available_fields(self):
598        fields = [
599            'student_id','reg_number','matric_number',
600            'mandatory', 'score', 'carry_over', 'automatic',
601            'level_session'
602            ] + self.additional_fields
603        return sorted(fields)
604
605    def getParent(self, row, site):
606        student = self._getStudent(row, site)
607        if student is None:
608            return None
609        return student['studycourse'].get(row['level'])
610
611    def getEntry(self, row, site):
612        level = self.getParent(row, site)
613        if level is None:
614            return None
615        return level.get(row['code'])
616
617    def updateEntry(self, obj, row, site, filename):
618        """Update obj to the values given in row.
619        """
620        items_changed = super(CourseTicketProcessor, self).updateEntry(
621            obj, row, site, filename)
622        parent = self.getParent(row, site)
623        student = self.getParent(row, site).__parent__.__parent__
624        student.__parent__.logger.info(
625            '%s - %s - %s - %s - updated: %s'
626            % (self.name, filename, student.student_id, parent.level, items_changed))
627        return
628
629    def addEntry(self, obj, row, site):
630        parent = self.getParent(row, site)
631        catalog = getUtility(ICatalog, name='courses_catalog')
632        entries = list(catalog.searchResults(code=(row['code'],row['code'])))
633        obj.fcode = entries[0].__parent__.__parent__.__parent__.code
634        obj.dcode = entries[0].__parent__.__parent__.code
635        obj.title = entries[0].title
636        #if getattr(obj, 'credits', None) is None:
637        obj.credits = entries[0].credits
638        #if getattr(obj, 'passmark', None) is None:
639        obj.passmark = entries[0].passmark
640        obj.semester = entries[0].semester
641        parent[row['code']] = obj
642        return
643
644    def delEntry(self, row, site):
645        ticket = self.getEntry(row, site)
646        parent = self.getParent(row, site)
647        if ticket is not None:
648            student = self._getStudent(row, site)
649            student.__parent__.logger.info('%s - Course ticket in %s removed: %s'
650                % (student.student_id, parent.level, ticket.code))
651            del parent[ticket.code]
652        return
653
654    def checkConversion(self, row, mode='ignore'):
655        """Validates all values in row.
656        """
657        errs, inv_errs, conv_dict = super(
658            CourseTicketProcessor, self).checkConversion(row, mode=mode)
659        if mode == 'remove':
660            return errs, inv_errs, conv_dict
661        # In update and create mode we have to check if course really exists.
662        # This is not done by the converter.
663        catalog = getUtility(ICatalog, name='courses_catalog')
664        entries = catalog.searchResults(code=(row['code'],row['code']))
665        if len(entries) == 0:
666            errs.append(('code','non-existent'))
667            return errs, inv_errs, conv_dict
668        # If level_session is provided in row we have to check if
669        # the parent studylevel exists and if its level_session
670        # attribute corresponds with the expected value in row.
671        level_session = conv_dict.get('level_session', IGNORE_MARKER)
672        if level_session not in (IGNORE_MARKER, None):
673            site = grok.getSite()
674            studylevel = self.getParent(row, site)
675            if studylevel is not None:
676                if studylevel.level_session != level_session:
677                    errs.append(('level_session','does not match %s'
678                        % studylevel.level_session))
679            else:
680                errs.append(('level','does not exist'))
681        return errs, inv_errs, conv_dict
682
683class StudentOnlinePaymentProcessor(StudentProcessorBase):
684    """A batch processor for IStudentOnlinePayment objects.
685    """
686    grok.implements(IBatchProcessor)
687    grok.provides(IBatchProcessor)
688    grok.context(Interface)
689    util_name = 'paymentprocessor'
690    grok.name(util_name)
691
692    name = u'Student Payment Processor'
693    iface = IStudentOnlinePayment
694    factory_name = 'waeup.StudentOnlinePayment'
695
696    location_fields = []
697    additional_fields = ['p_id']
698    additional_headers = []
699
700    def checkHeaders(self, headerfields, mode='ignore'):
701        super(StudentOnlinePaymentProcessor, self).checkHeaders(headerfields)
702        if mode in ('update', 'remove') and not 'p_id' in headerfields:
703            raise FatalCSVError(
704                "Need p_id for import in update and remove modes!")
705        return True
706
707    def parentsExist(self, row, site):
708        return self.getParent(row, site) is not None
709
710    def getParent(self, row, site):
711        student = self._getStudent(row, site)
712        if student is None:
713            return None
714        return student['payments']
715
716    def getEntry(self, row, site):
717        payments = self.getParent(row, site)
718        if payments is None:
719            return None
720        p_id = row.get('p_id', None)
721        if p_id is None:
722            return None
723        # We can use the hash symbol at the end of p_id in import files
724        # to avoid annoying automatic number transformation
725        # by Excel or Calc
726        p_id = p_id.strip('#')
727        if len(p_id.split('-')) != 3 and not p_id.startswith('p'):
728            # For data migration from old SRP only
729            p_id = 'p' + p_id[7:] + '0'
730        entry = payments.get(p_id)
731        return entry
732
733    def updateEntry(self, obj, row, site, filename):
734        """Update obj to the values given in row.
735        """
736        items_changed = super(StudentOnlinePaymentProcessor, self).updateEntry(
737            obj, row, site, filename)
738        student = self.getParent(row, site).__parent__
739        student.__parent__.logger.info(
740            '%s - %s - %s - updated: %s'
741            % (self.name, filename, student.student_id, items_changed))
742        return
743
744    def addEntry(self, obj, row, site):
745        parent = self.getParent(row, site)
746        p_id = row['p_id'].strip('#')
747        if len(p_id.split('-')) != 3 and not p_id.startswith('p'):
748            # For data migration from old SRP
749            obj.p_id = 'p' + p_id[7:] + '0'
750            parent[obj.p_id] = obj
751        else:
752            parent[p_id] = obj
753        return
754
755    def delEntry(self, row, site):
756        payment = self.getEntry(row, site)
757        parent = self.getParent(row, site)
758        if payment is not None:
759            student = self._getStudent(row, site)
760            student.__parent__.logger.info('%s - Payment ticket removed: %s'
761                % (student.student_id, payment.p_id))
762            del parent[payment.p_id]
763        return
764
765    def checkConversion(self, row, mode='ignore'):
766        """Validates all values in row.
767        """
768        errs, inv_errs, conv_dict = super(
769            StudentOnlinePaymentProcessor, self).checkConversion(row, mode=mode)
770
771        # We have to check p_id.
772        p_id = row.get('p_id', None)
773        if not p_id:
774            timestamp = ("%d" % int(time()*10000))[1:]
775            p_id = "p%s" % timestamp
776            conv_dict['p_id'] = p_id
777            return errs, inv_errs, conv_dict
778        else:
779            p_id = p_id.strip('#')
780        if p_id.startswith('p'):
781            if not len(p_id) == 14:
782                errs.append(('p_id','invalid length'))
783                return errs, inv_errs, conv_dict
784        elif len(p_id.split('-')) == 3:
785            # The SRP used either pins as keys ...
786            if len(p_id.split('-')[2]) not in (9, 10):
787                errs.append(('p_id','invalid pin'))
788                return errs, inv_errs, conv_dict
789        else:
790            # ... or order_ids.
791            if not len(p_id) == 19:
792                errs.append(('p_id','invalid length'))
793                return errs, inv_errs, conv_dict
794        return errs, inv_errs, conv_dict
795
796class StudentVerdictProcessor(StudentStudyCourseProcessor):
797    """A special batch processor for verdicts.
798
799    Import verdicts and perform workflow transitions.
800    """
801
802    util_name = 'verdictupdater'
803    grok.name(util_name)
804
805    name = u'Verdict Processor (special processor, update only)'
806    iface = IStudentVerdictUpdate
807    factory_name = 'waeup.StudentStudyCourse'
808
809    def checkUpdateRequirements(self, obj, row, site):
810        """Checks requirements the studycourse and the student must fulfill
811        before being updated.
812        """
813        # Check if current_levels correspond
814        if obj.current_level != row['current_level']:
815            return 'Current level does not correspond.'
816        # Check if current_sessions correspond
817        if obj.current_session != row['current_session']:
818            return 'Current session does not correspond.'
819        # Check if new verdict is provided
820        if row['current_verdict'] in (IGNORE_MARKER, ''):
821            return 'No verdict in import file.'
822        # Check if studylevel exists
823        level_string = str(obj.current_level)
824        if obj.get(level_string) is None:
825            return 'Study level object is missing.'
826        # Check if student is in state REGISTERED or VALIDATED
827        if row.get('bypass_validation'):
828            if obj.student.state not in (VALIDATED, REGISTERED):
829                return 'Student in wrong state.'
830        else:
831            if obj.student.state != VALIDATED:
832                return 'Student in wrong state.'
833        return None
834
835    def updateEntry(self, obj, row, site, filename):
836        """Update obj to the values given in row.
837        """
838        # Don't set current_session, current_level
839        vals_to_set = dict((key, val) for key, val in row.items()
840                           if key not in ('current_session','current_level'))
841        super(StudentVerdictProcessor, self).updateEntry(
842            obj, vals_to_set, site, filename)
843        parent = self.getParent(row, site)
844        # Set current_vedict in corresponding studylevel
845        level_string = str(obj.current_level)
846        obj[level_string].level_verdict = row['current_verdict']
847        # Fire transition and set studylevel attributes
848        # depending on student's state
849        if obj.__parent__.state == REGISTERED:
850            validated_by = row.get('validated_by', '')
851            if validated_by in (IGNORE_MARKER, ''):
852                portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
853                system = translate(_('System'),'waeup.kofa',
854                                  target_language=portal_language)
855                obj[level_string].validated_by = system
856            else:
857                obj[level_string].validated_by = validated_by
858            obj[level_string].validation_date = datetime.utcnow()
859            IWorkflowInfo(obj.__parent__).fireTransition('bypass_validation')
860        else:
861            IWorkflowInfo(obj.__parent__).fireTransition('return')
862        # Update the students_catalog
863        notify(grok.ObjectModifiedEvent(obj.__parent__))
864        return
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