source: main/waeup.kofa/trunk/src/waeup/kofa/students/utils.py @ 13124

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1## $Id: utils.py 13124 2015-07-01 16:24:58Z 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"""General helper functions and utilities for the students section.
19"""
20import grok
21from time import time
22from reportlab.lib import colors
23from reportlab.lib.units import cm
24from reportlab.lib.pagesizes import A4
25from reportlab.lib.styles import getSampleStyleSheet
26from reportlab.platypus import Paragraph, Image, Table, Spacer
27from zope.event import notify
28from zope.schema.interfaces import ConstraintNotSatisfied
29from zope.component import getUtility, createObject
30from zope.formlib.form import setUpEditWidgets
31from zope.i18n import translate
32from waeup.kofa.interfaces import (
33    IExtFileStore, IKofaUtils, RETURNING, PAID, CLEARED,
34    academic_sessions_vocab)
35from waeup.kofa.interfaces import MessageFactory as _
36from waeup.kofa.students.interfaces import IStudentsUtils
37from waeup.kofa.students.workflow import ADMITTED
38from waeup.kofa.students.vocabularies import StudyLevelSource, MatNumNotInSource
39from waeup.kofa.browser.pdf import (
40    ENTRY1_STYLE, format_html, NOTE_STYLE, HEADING_STYLE,
41    get_signature_tables, get_qrcode)
42from waeup.kofa.browser.interfaces import IPDFCreator
43from waeup.kofa.utils.helpers import to_timezone
44
45SLIP_STYLE = [
46    ('VALIGN',(0,0),(-1,-1),'TOP'),
47    #('FONT', (0,0), (-1,-1), 'Helvetica', 11),
48    ]
49
50CONTENT_STYLE = [
51    ('VALIGN',(0,0),(-1,-1),'TOP'),
52    #('FONT', (0,0), (-1,-1), 'Helvetica', 8),
53    #('TEXTCOLOR',(0,0),(-1,0),colors.white),
54    #('BACKGROUND',(0,0),(-1,0),colors.black),
55    ('INNERGRID', (0,0), (-1,-1), 0.25, colors.black),
56    ('BOX', (0,0), (-1,-1), 1, colors.black),
57
58    ]
59
60FONT_SIZE = 10
61FONT_COLOR = 'black'
62
63def trans(text, lang):
64    # shortcut
65    return translate(text, 'waeup.kofa', target_language=lang)
66
67def formatted_text(text, color=FONT_COLOR, lang='en'):
68    """Turn `text`, `color` and `size` into an HTML snippet.
69
70    The snippet is suitable for use with reportlab and generating PDFs.
71    Wraps the `text` into a ``<font>`` tag with passed attributes.
72
73    Also non-strings are converted. Raw strings are expected to be
74    utf-8 encoded (usually the case for widgets etc.).
75
76    Finally, a br tag is added if widgets contain div tags
77    which are not supported by reportlab.
78
79    The returned snippet is unicode type.
80    """
81    if not isinstance(text, unicode):
82        if isinstance(text, basestring):
83            text = text.decode('utf-8')
84        else:
85            text = unicode(text)
86    if text == 'None':
87        text = ''
88    # Mainly for boolean values we need our customized
89    # localisation of the zope domain
90    text = translate(text, 'zope', target_language=lang)
91    text = text.replace('</div>', '<br /></div>')
92    tag1 = u'<font color="%s">' % (color)
93    return tag1 + u'%s</font>' % text
94
95def generate_student_id():
96    students = grok.getSite()['students']
97    new_id = students.unique_student_id
98    return new_id
99
100def set_up_widgets(view, ignore_request=False):
101    view.adapters = {}
102    view.widgets = setUpEditWidgets(
103        view.form_fields, view.prefix, view.context, view.request,
104        adapters=view.adapters, for_display=True,
105        ignore_request=ignore_request
106        )
107
108def render_student_data(studentview, context, omit_fields=(),
109                        lang='en', slipname=None):
110    """Render student table for an existing frame.
111    """
112    width, height = A4
113    set_up_widgets(studentview, ignore_request=True)
114    data_left = []
115    data_middle = []
116    style = getSampleStyleSheet()
117    img = getUtility(IExtFileStore).getFileByContext(
118        studentview.context, attr='passport.jpg')
119    if img is None:
120        from waeup.kofa.browser import DEFAULT_PASSPORT_IMAGE_PATH
121        img = open(DEFAULT_PASSPORT_IMAGE_PATH, 'rb')
122    doc_img = Image(img.name, width=4*cm, height=4*cm, kind='bound')
123    data_left.append([doc_img])
124    #data.append([Spacer(1, 12)])
125
126    f_label = trans(_('Name:'), lang)
127    f_label = Paragraph(f_label, ENTRY1_STYLE)
128    f_text = formatted_text(studentview.context.display_fullname)
129    f_text = Paragraph(f_text, ENTRY1_STYLE)
130    data_middle.append([f_label,f_text])
131
132    for widget in studentview.widgets:
133        if 'name' in widget.name:
134            continue
135        f_label = translate(
136            widget.label.strip(), 'waeup.kofa',
137            target_language=lang)
138        f_label = Paragraph('%s:' % f_label, ENTRY1_STYLE)
139        f_text = formatted_text(widget(), lang=lang)
140        f_text = Paragraph(f_text, ENTRY1_STYLE)
141        data_middle.append([f_label,f_text])
142
143    if getattr(studentview.context, 'certcode', None):
144        if not 'certificate' in omit_fields:
145            f_label = trans(_('Study Course:'), lang)
146            f_label = Paragraph(f_label, ENTRY1_STYLE)
147            f_text = formatted_text(
148                studentview.context['studycourse'].certificate.longtitle)
149            f_text = Paragraph(f_text, ENTRY1_STYLE)
150            data_middle.append([f_label,f_text])
151        if not 'department' in omit_fields:
152            f_label = trans(_('Department:'), lang)
153            f_label = Paragraph(f_label, ENTRY1_STYLE)
154            f_text = formatted_text(
155                studentview.context[
156                'studycourse'].certificate.__parent__.__parent__.longtitle,
157                )
158            f_text = Paragraph(f_text, ENTRY1_STYLE)
159            data_middle.append([f_label,f_text])
160        if not 'faculty' in omit_fields:
161            f_label = trans(_('Faculty:'), lang)
162            f_label = Paragraph(f_label, ENTRY1_STYLE)
163            f_text = formatted_text(
164                studentview.context[
165                'studycourse'].certificate.__parent__.__parent__.__parent__.longtitle,
166                )
167            f_text = Paragraph(f_text, ENTRY1_STYLE)
168            data_middle.append([f_label,f_text])
169        if not 'current_mode' in omit_fields:
170            studymodes_dict = getUtility(IKofaUtils).STUDY_MODES_DICT
171            sm = studymodes_dict[studentview.context.current_mode]
172            f_label = trans(_('Study Mode:'), lang)
173            f_label = Paragraph(f_label, ENTRY1_STYLE)
174            f_text = formatted_text(sm)
175            f_text = Paragraph(f_text, ENTRY1_STYLE)
176            data_middle.append([f_label,f_text])
177        if not 'entry_session' in omit_fields:
178            f_label = trans(_('Entry Session:'), lang)
179            f_label = Paragraph(f_label, ENTRY1_STYLE)
180            entry_session = studentview.context.entry_session
181            entry_session = academic_sessions_vocab.getTerm(entry_session).title
182            f_text = formatted_text(entry_session)
183            f_text = Paragraph(f_text, ENTRY1_STYLE)
184            data_middle.append([f_label,f_text])
185        # Requested by Uniben, does not really make sense
186        if not 'current_level' in omit_fields:
187            f_label = trans(_('Current Level:'), lang)
188            f_label = Paragraph(f_label, ENTRY1_STYLE)
189            current_level = studentview.context['studycourse'].current_level
190            studylevelsource = StudyLevelSource().factory
191            current_level = studylevelsource.getTitle(
192                studentview.context, current_level)
193            f_text = formatted_text(current_level)
194            f_text = Paragraph(f_text, ENTRY1_STYLE)
195            data_middle.append([f_label,f_text])
196        if not 'date_of_birth' in omit_fields:
197            f_label = trans(_('Date of Birth:'), lang)
198            f_label = Paragraph(f_label, ENTRY1_STYLE)
199            date_of_birth = studentview.context.date_of_birth
200            tz = getUtility(IKofaUtils).tzinfo
201            date_of_birth = to_timezone(date_of_birth, tz)
202            if date_of_birth is not None:
203                date_of_birth = date_of_birth.strftime("%d/%m/%Y")
204            f_text = formatted_text(date_of_birth)
205            f_text = Paragraph(f_text, ENTRY1_STYLE)
206            data_middle.append([f_label,f_text])
207
208    # append QR code to the right
209    if slipname:
210        url = studentview.url(context, slipname)
211        data_right = [[get_qrcode(url, width=70.0)]]
212        table_right = Table(data_right,style=SLIP_STYLE)
213    else:
214        table_right = None
215
216    table_left = Table(data_left,style=SLIP_STYLE)
217    table_middle = Table(data_middle,style=SLIP_STYLE, colWidths=[5*cm, 5*cm])
218    table = Table([[table_left, table_middle, table_right],],style=SLIP_STYLE)
219    return table
220
221def render_table_data(tableheader, tabledata, lang='en'):
222    """Render children table for an existing frame.
223    """
224    data = []
225    #data.append([Spacer(1, 12)])
226    line = []
227    style = getSampleStyleSheet()
228    for element in tableheader:
229        field = '<strong>%s</strong>' % formatted_text(element[0], lang=lang)
230        field = Paragraph(field, style["Normal"])
231        line.append(field)
232    data.append(line)
233    for ticket in tabledata:
234        line = []
235        for element in tableheader:
236              field = formatted_text(getattr(ticket,element[1],u' '))
237              field = Paragraph(field, style["Normal"])
238              line.append(field)
239        data.append(line)
240    table = Table(data,colWidths=[
241        element[2]*cm for element in tableheader], style=CONTENT_STYLE)
242    return table
243
244def render_transcript_data(view, tableheader, levels_data, lang='en'):
245    """Render children table for an existing frame.
246    """
247    data = []
248    style = getSampleStyleSheet()
249    for level in levels_data:
250        level_obj = level['level']
251        tickets = level['tickets_1'] + level['tickets_2'] + level['tickets_3']
252        headerline = []
253        tabledata = []
254        subheader = '%s %s, %s %s' % (
255            trans(_('Session'), lang),
256            view.session_dict[level_obj.level_session],
257            trans(_('Level'), lang),
258            view.level_dict[level_obj.level])
259        data.append(Paragraph(subheader, HEADING_STYLE))
260        for element in tableheader:
261            field = '<strong>%s</strong>' % formatted_text(element[0])
262            field = Paragraph(field, style["Normal"])
263            headerline.append(field)
264        tabledata.append(headerline)
265        for ticket in tickets:
266            ticketline = []
267            for element in tableheader:
268                  field = formatted_text(getattr(ticket,element[1],u' '))
269                  field = Paragraph(field, style["Normal"])
270                  ticketline.append(field)
271            tabledata.append(ticketline)
272        table = Table(tabledata,colWidths=[
273            element[2]*cm for element in tableheader], style=CONTENT_STYLE)
274        data.append(table)
275        sgpa = '%s: %s' % (trans('Sessional GPA (rectified)', lang), level['sgpa'])
276        data.append(Paragraph(sgpa, style["Normal"]))
277    return data
278
279def docs_as_flowables(view, lang='en'):
280    """Create reportlab flowables out of scanned docs.
281    """
282    # XXX: fix circular import problem
283    from waeup.kofa.browser.fileviewlets import FileManager
284    from waeup.kofa.browser import DEFAULT_IMAGE_PATH
285    style = getSampleStyleSheet()
286    data = []
287
288    # Collect viewlets
289    fm = FileManager(view.context, view.request, view)
290    fm.update()
291    if fm.viewlets:
292        sc_translation = trans(_('Scanned Documents'), lang)
293        data.append(Paragraph(sc_translation, HEADING_STYLE))
294        # Insert list of scanned documents
295        table_data = []
296        for viewlet in fm.viewlets:
297            if viewlet.file_exists:
298                # Show viewlet only if file exists
299                f_label = Paragraph(trans(viewlet.label, lang), ENTRY1_STYLE)
300                img_path = getattr(getUtility(IExtFileStore).getFileByContext(
301                    view.context, attr=viewlet.download_name), 'name', None)
302                #f_text = Paragraph(trans(_('(not provided)'),lang), ENTRY1_STYLE)
303                if img_path is None:
304                    pass
305                elif not img_path[-4:] in ('.jpg', '.JPG'):
306                    # reportlab requires jpg images, I think.
307                    f_text = Paragraph('%s (not displayable)' % (
308                        viewlet.title,), ENTRY1_STYLE)
309                else:
310                    f_text = Image(img_path, width=2*cm, height=1*cm, kind='bound')
311                table_data.append([f_label, f_text])
312        if table_data:
313            # safety belt; empty tables lead to problems.
314            data.append(Table(table_data, style=SLIP_STYLE))
315    return data
316
317class StudentsUtils(grok.GlobalUtility):
318    """A collection of methods subject to customization.
319    """
320    grok.implements(IStudentsUtils)
321
322    def getReturningData(self, student):
323        """ Define what happens after school fee payment
324        depending on the student's senate verdict.
325        In the base configuration current level is always increased
326        by 100 no matter which verdict has been assigned.
327        """
328        new_level = student['studycourse'].current_level + 100
329        new_session = student['studycourse'].current_session + 1
330        return new_session, new_level
331
332    def setReturningData(self, student):
333        """ Define what happens after school fee payment
334        depending on the student's senate verdict.
335        This method folllows the same algorithm as `getReturningData` but
336        it also sets the new values.
337        """
338        new_session, new_level = self.getReturningData(student)
339        try:
340            student['studycourse'].current_level = new_level
341        except ConstraintNotSatisfied:
342            # Do not change level if level exceeds the
343            # certificate's end_level.
344            pass
345        student['studycourse'].current_session = new_session
346        verdict = student['studycourse'].current_verdict
347        student['studycourse'].current_verdict = '0'
348        student['studycourse'].previous_verdict = verdict
349        return
350
351    def _getSessionConfiguration(self, session):
352        try:
353            return grok.getSite()['configuration'][str(session)]
354        except KeyError:
355            return None
356
357    def _isPaymentDisabled(self, p_session, category, student):
358        academic_session = self._getSessionConfiguration(p_session)
359        if category == 'schoolfee' and \
360            'sf_all' in academic_session.payment_disabled:
361            return True
362        return False
363
364    def samePaymentMade(self, student, category, p_item, p_session):
365        for key in student['payments'].keys():
366            ticket = student['payments'][key]
367            if ticket.p_state == 'paid' and\
368               ticket.p_category == category and \
369               ticket.p_item == p_item and \
370               ticket.p_session == p_session:
371                  return True
372        return False
373
374    def setPaymentDetails(self, category, student,
375            previous_session, previous_level):
376        """Create a payment ticket and set the payment data of a
377        student for the payment category specified.
378        """
379        p_item = u''
380        amount = 0.0
381        if previous_session:
382            if previous_session < student['studycourse'].entry_session:
383                return _('The previous session must not fall below '
384                         'your entry session.'), None
385            if category == 'schoolfee':
386                # School fee is always paid for the following session
387                if previous_session > student['studycourse'].current_session:
388                    return _('This is not a previous session.'), None
389            else:
390                if previous_session > student['studycourse'].current_session - 1:
391                    return _('This is not a previous session.'), None
392            p_session = previous_session
393            p_level = previous_level
394            p_current = False
395        else:
396            p_session = student['studycourse'].current_session
397            p_level = student['studycourse'].current_level
398            p_current = True
399        academic_session = self._getSessionConfiguration(p_session)
400        if academic_session == None:
401            return _(u'Session configuration object is not available.'), None
402        # Determine fee.
403        if category == 'schoolfee':
404            try:
405                certificate = student['studycourse'].certificate
406                p_item = certificate.code
407            except (AttributeError, TypeError):
408                return _('Study course data are incomplete.'), None
409            if previous_session:
410                # Students can pay for previous sessions in all
411                # workflow states.  Fresh students are excluded by the
412                # update method of the PreviousPaymentAddFormPage.
413                if previous_level == 100:
414                    amount = getattr(certificate, 'school_fee_1', 0.0)
415                else:
416                    amount = getattr(certificate, 'school_fee_2', 0.0)
417            else:
418                if student.state == CLEARED:
419                    amount = getattr(certificate, 'school_fee_1', 0.0)
420                elif student.state == RETURNING:
421                    # In case of returning school fee payment the
422                    # payment session and level contain the values of
423                    # the session the student has paid for. Payment
424                    # session is always next session.
425                    p_session, p_level = self.getReturningData(student)
426                    academic_session = self._getSessionConfiguration(p_session)
427                    if academic_session == None:
428                        return _(
429                            u'Session configuration object is not available.'
430                            ), None
431                    amount = getattr(certificate, 'school_fee_2', 0.0)
432                elif student.is_postgrad and student.state == PAID:
433                    # Returning postgraduate students also pay for the
434                    # next session but their level always remains the
435                    # same.
436                    p_session += 1
437                    academic_session = self._getSessionConfiguration(p_session)
438                    if academic_session == None:
439                        return _(
440                            u'Session configuration object is not available.'
441                            ), None
442                    amount = getattr(certificate, 'school_fee_2', 0.0)
443        elif category == 'clearance':
444            try:
445                p_item = student['studycourse'].certificate.code
446            except (AttributeError, TypeError):
447                return _('Study course data are incomplete.'), None
448            amount = academic_session.clearance_fee
449        elif category == 'bed_allocation':
450            p_item = self.getAccommodationDetails(student)['bt']
451            amount = academic_session.booking_fee
452        elif category == 'hostel_maintenance':
453            amount = 0.0
454            bedticket = student['accommodation'].get(
455                str(student.current_session), None)
456            if bedticket:
457                p_item = bedticket.bed_coordinates
458                if bedticket.bed.__parent__.maint_fee > 0:
459                    amount = bedticket.bed.__parent__.maint_fee
460                else:
461                    # fallback
462                    amount = academic_session.maint_fee
463            else:
464                # Should not happen because this is already checked
465                # in the browser module, but anyway ...
466                portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
467                p_item = trans(_('no bed allocated'), portal_language)
468        elif category == 'transcript':
469            amount = academic_session.transcript_fee
470        elif category == 'late_registration':
471            amount = academic_session.late_registration_fee
472        if amount in (0.0, None):
473            return _('Amount could not be determined.'), None
474        if self.samePaymentMade(student, category, p_item, p_session):
475            return _('This type of payment has already been made.'), None
476        if self._isPaymentDisabled(p_session, category, student):
477            return _('Payment temporarily disabled.'), None
478        payment = createObject(u'waeup.StudentOnlinePayment')
479        timestamp = ("%d" % int(time()*10000))[1:]
480        payment.p_id = "p%s" % timestamp
481        payment.p_category = category
482        payment.p_item = p_item
483        payment.p_session = p_session
484        payment.p_level = p_level
485        payment.p_current = p_current
486        payment.amount_auth = amount
487        return None, payment
488
489    def setBalanceDetails(self, category, student,
490            balance_session, balance_level, balance_amount):
491        """Create a balance payment ticket and set the payment data
492        as selected by the student.
493        """
494        p_item = u'Balance'
495        p_session = balance_session
496        p_level = balance_level
497        p_current = False
498        amount = balance_amount
499        academic_session = self._getSessionConfiguration(p_session)
500        if academic_session == None:
501            return _(u'Session configuration object is not available.'), None
502        if amount in (0.0, None) or amount < 0:
503            return _('Amount must be greater than 0.'), None
504        if self.samePaymentMade(student, 'balance', p_item, p_session):
505            return _('This type of payment has already been made.'), None
506        payment = createObject(u'waeup.StudentOnlinePayment')
507        timestamp = ("%d" % int(time()*10000))[1:]
508        payment.p_id = "p%s" % timestamp
509        payment.p_category = category
510        payment.p_item = p_item
511        payment.p_session = p_session
512        payment.p_level = p_level
513        payment.p_current = p_current
514        payment.amount_auth = amount
515        return None, payment
516
517    def increaseMatricInteger(self, student):
518        """Increase counter for matric numbers.
519        This counter can be a centrally stored attribute or an attribute of
520        faculties, departments or certificates. In the base package the counter
521        is as an attribute of the site configuration container.
522        """
523        grok.getSite()['configuration'].next_matric_integer += 1
524        return
525
526    def constructMatricNumber(self, student):
527        """Fetch the matric number counter which fits the student and
528        construct the new matric number of the student.
529        In the base package the counter is returned which is as an attribute
530        of the site configuration container.
531        """
532        next_integer = grok.getSite()['configuration'].next_matric_integer
533        if next_integer == 0:
534            return _('Matriculation number cannot be set.'), None
535        return None, unicode(next_integer)
536
537    def setMatricNumber(self, student):
538        """Set matriculation number of student. If the student's matric number
539        is unset a new matric number is
540        constructed according to the matriculation number construction rules
541        defined in the `constructMatricNumber` method. The new matric number is
542        set, the students catalog updated. The corresponding matric number
543        counter is increased by one.
544
545        This method is tested but not used in the base package. It can
546        be used in custom packages by adding respective views
547        and by customizing `increaseMatricInteger` and `constructMatricNumber`
548        according to the university's matriculation number construction rules.
549
550        The method can be disabled by setting the counter to zero.
551        """
552        if student.matric_number is not None:
553            return _('Matriculation number already set.'), None
554        if student.certcode is None:
555            return _('No certificate assigned.'), None
556        error, matric_number = self.constructMatricNumber(student)
557        if error:
558            return error, None
559        try:
560            student.matric_number = matric_number
561        except MatNumNotInSource:
562            return _('Matriculation number exists.'), None
563        notify(grok.ObjectModifiedEvent(student))
564        self.increaseMatricInteger(student)
565        return None, matric_number
566
567    def getAccommodationDetails(self, student):
568        """Determine the accommodation data of a student.
569        """
570        d = {}
571        d['error'] = u''
572        hostels = grok.getSite()['hostels']
573        d['booking_session'] = hostels.accommodation_session
574        d['allowed_states'] = hostels.accommodation_states
575        d['startdate'] = hostels.startdate
576        d['enddate'] = hostels.enddate
577        d['expired'] = hostels.expired
578        # Determine bed type
579        studycourse = student['studycourse']
580        certificate = getattr(studycourse,'certificate',None)
581        entry_session = studycourse.entry_session
582        current_level = studycourse.current_level
583        if None in (entry_session, current_level, certificate):
584            return d
585        end_level = certificate.end_level
586        if current_level == 10:
587            bt = 'pr'
588        elif entry_session == grok.getSite()['hostels'].accommodation_session:
589            bt = 'fr'
590        elif current_level >= end_level:
591            bt = 'fi'
592        else:
593            bt = 're'
594        if student.sex == 'f':
595            sex = 'female'
596        else:
597            sex = 'male'
598        special_handling = 'regular'
599        d['bt'] = u'%s_%s_%s' % (special_handling,sex,bt)
600        return d
601
602    def selectBed(self, available_beds):
603        """Select a bed from a list of available beds.
604        In the base configuration we select the first bed found,
605        but can also randomize the selection if we like.
606        """
607        return available_beds[0]
608
609    def _admissionText(self, student, portal_language):
610        inst_name = grok.getSite()['configuration'].name
611        text = trans(_(
612            'This is to inform you that you have been provisionally'
613            ' admitted into ${a} as follows:', mapping = {'a': inst_name}),
614            portal_language)
615        return text
616
617    def renderPDFAdmissionLetter(self, view, student=None, omit_fields=(),
618                                 pre_text=None, post_text=None,):
619        """Render pdf admission letter.
620        """
621        if student is None:
622            return
623        style = getSampleStyleSheet()
624        creator = self.getPDFCreator(student)
625        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
626        data = []
627        doc_title = view.label
628        author = '%s (%s)' % (view.request.principal.title,
629                              view.request.principal.id)
630        footer_text = view.label.split('\n')
631        if len(footer_text) > 1:
632            # We can add a department in first line
633            footer_text = footer_text[1]
634        else:
635            # Only the first line is used for the footer
636            footer_text = footer_text[0]
637        if getattr(student, 'student_id', None) is not None:
638            footer_text = "%s - %s - " % (student.student_id, footer_text)
639
640        # Text before student data
641        if pre_text is None:
642            html = format_html(self._admissionText(student, portal_language))
643        else:
644            html = format_html(pre_text)
645        if html:
646            data.append(Paragraph(html, NOTE_STYLE))
647            data.append(Spacer(1, 20))
648
649        # Student data
650        data.append(render_student_data(view, student,
651                    omit_fields, lang=portal_language,
652                    slipname='admission_slip.pdf'))
653
654        # Text after student data
655        data.append(Spacer(1, 20))
656        if post_text is None:
657            datelist = student.history.messages[0].split()[0].split('-')
658            creation_date = u'%s/%s/%s' % (datelist[2], datelist[1], datelist[0])
659            post_text = trans(_(
660                'Your Kofa student record was created on ${a}.',
661                mapping = {'a': creation_date}),
662                portal_language)
663        #html = format_html(post_text)
664        #data.append(Paragraph(html, NOTE_STYLE))
665
666        # Create pdf stream
667        view.response.setHeader(
668            'Content-Type', 'application/pdf')
669        pdf_stream = creator.create_pdf(
670            data, None, doc_title, author=author, footer=footer_text,
671            note=post_text)
672        return pdf_stream
673
674    def getPDFCreator(self, context):
675        """Get a pdf creator suitable for `context`.
676        The default implementation always returns the default creator.
677        """
678        return getUtility(IPDFCreator)
679
680    def renderPDF(self, view, filename='slip.pdf', student=None,
681                  studentview=None,
682                  tableheader=[], tabledata=[],
683                  note=None, signatures=None, sigs_in_footer=(),
684                  show_scans=True, topMargin=1.5,
685                  omit_fields=()):
686        """Render pdf slips for various pages.
687        """
688        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
689        # XXX: tell what the different parameters mean
690        style = getSampleStyleSheet()
691        creator = self.getPDFCreator(student)
692        data = []
693        doc_title = view.label
694        author = '%s (%s)' % (view.request.principal.title,
695                              view.request.principal.id)
696        footer_text = view.label.split('\n')
697        if len(footer_text) > 2:
698            # We can add a department in first line
699            footer_text = footer_text[1]
700        else:
701            # Only the first line is used for the footer
702            footer_text = footer_text[0]
703        if getattr(student, 'student_id', None) is not None:
704            footer_text = "%s - %s - " % (student.student_id, footer_text)
705
706        # Insert student data table
707        if student is not None:
708            bd_translation = trans(_('Base Data'), portal_language)
709            data.append(Paragraph(bd_translation, HEADING_STYLE))
710            data.append(render_student_data(
711                studentview, view.context, omit_fields, lang=portal_language,
712                slipname=filename))
713
714        # Insert widgets
715        if view.form_fields:
716            data.append(Paragraph(view.title, HEADING_STYLE))
717            separators = getattr(self, 'SEPARATORS_DICT', {})
718            table = creator.getWidgetsTable(
719                view.form_fields, view.context, None, lang=portal_language,
720                separators=separators)
721            data.append(table)
722
723        # Insert scanned docs
724        if show_scans:
725            data.extend(docs_as_flowables(view, portal_language))
726
727        # Insert history
728        if filename.startswith('clearance'):
729            hist_translation = trans(_('Workflow History'), portal_language)
730            data.append(Paragraph(hist_translation, HEADING_STYLE))
731            data.extend(creator.fromStringList(student.history.messages))
732
733        # Insert content tables (optionally on second page)
734        if hasattr(view, 'tabletitle'):
735            for i in range(len(view.tabletitle)):
736                if tabledata[i] and tableheader[i]:
737                    #data.append(PageBreak())
738                    #data.append(Spacer(1, 20))
739                    data.append(Paragraph(view.tabletitle[i], HEADING_STYLE))
740                    data.append(Spacer(1, 8))
741                    contenttable = render_table_data(tableheader[i],tabledata[i])
742                    data.append(contenttable)
743
744        # Insert signatures
745        # XXX: We are using only sigs_in_footer in waeup.kofa, so we
746        # do not have a test for the following lines.
747        if signatures and not sigs_in_footer:
748            data.append(Spacer(1, 20))
749            # Render one signature table per signature to
750            # get date and signature in line.
751            for signature in signatures:
752                signaturetables = get_signature_tables(signature)
753                data.append(signaturetables[0])
754
755        view.response.setHeader(
756            'Content-Type', 'application/pdf')
757        try:
758            pdf_stream = creator.create_pdf(
759                data, None, doc_title, author=author, footer=footer_text,
760                note=note, sigs_in_footer=sigs_in_footer, topMargin=topMargin)
761        except IOError:
762            view.flash('Error in image file.')
763            return view.redirect(view.url(view.context))
764        return pdf_stream
765
766    gpa_boundaries = ((1, 'Fail'),
767                      (1.5, 'Pass'),
768                      (2.4, '3rd Class'),
769                      (3.5, '2nd Class Lower'),
770                      (4.5, '2nd Class Upper'),
771                      (5, '1st Class'))
772
773    def getClassFromCGPA(self, gpa):
774        if gpa < self.gpa_boundaries[0][0]:
775            return 0, self.gpa_boundaries[0][1]
776        if gpa < self.gpa_boundaries[1][0]:
777            return 1, self.gpa_boundaries[1][1]
778        if gpa < self.gpa_boundaries[2][0]:
779            return 2, self.gpa_boundaries[2][1]
780        if gpa < self.gpa_boundaries[3][0]:
781            return 3, self.gpa_boundaries[3][1]
782        if gpa < self.gpa_boundaries[4][0]:
783            return 4, self.gpa_boundaries[4][1]
784        if gpa <= self.gpa_boundaries[5][0]:
785            return 5, self.gpa_boundaries[5][1]
786        return 'N/A'
787
788    def renderPDFTranscript(self, view, filename='transcript.pdf',
789                  student=None,
790                  studentview=None,
791                  note=None, signatures=None, sigs_in_footer=(),
792                  show_scans=True, topMargin=1.5,
793                  omit_fields=(),
794                  tableheader=None):
795        """Render pdf slips for transcripts.
796        """
797        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
798        # XXX: tell what the different parameters mean
799        style = getSampleStyleSheet()
800        creator = self.getPDFCreator(student)
801        data = []
802        doc_title = view.label
803        author = '%s (%s)' % (view.request.principal.title,
804                              view.request.principal.id)
805        footer_text = view.label.split('\n')
806        if len(footer_text) > 2:
807            # We can add a department in first line
808            footer_text = footer_text[1]
809        else:
810            # Only the first line is used for the footer
811            footer_text = footer_text[0]
812        if getattr(student, 'student_id', None) is not None:
813            footer_text = "%s - %s - " % (student.student_id, footer_text)
814
815        # Insert student data table
816        if student is not None:
817            #bd_translation = trans(_('Base Data'), portal_language)
818            #data.append(Paragraph(bd_translation, HEADING_STYLE))
819            data.append(render_student_data(
820                studentview, view.context,
821                omit_fields, lang=portal_language,
822                slipname=filename))
823
824        transcript_data = view.context.getTranscriptData()
825        levels_data = transcript_data[0]
826        gpa = transcript_data[1]
827
828        contextdata = []
829        f_label = trans(_('Course of Study:'), portal_language)
830        f_label = Paragraph(f_label, ENTRY1_STYLE)
831        f_text = formatted_text(view.context.certificate.longtitle)
832        f_text = Paragraph(f_text, ENTRY1_STYLE)
833        contextdata.append([f_label,f_text])
834
835        f_label = trans(_('Faculty:'), portal_language)
836        f_label = Paragraph(f_label, ENTRY1_STYLE)
837        f_text = formatted_text(
838            view.context.certificate.__parent__.__parent__.__parent__.longtitle)
839        f_text = Paragraph(f_text, ENTRY1_STYLE)
840        contextdata.append([f_label,f_text])
841
842        f_label = trans(_('Department:'), portal_language)
843        f_label = Paragraph(f_label, ENTRY1_STYLE)
844        f_text = formatted_text(
845            view.context.certificate.__parent__.__parent__.longtitle)
846        f_text = Paragraph(f_text, ENTRY1_STYLE)
847        contextdata.append([f_label,f_text])
848
849        f_label = trans(_('Entry Session:'), portal_language)
850        f_label = Paragraph(f_label, ENTRY1_STYLE)
851        f_text = formatted_text(
852            view.session_dict.get(view.context.entry_session))
853        f_text = Paragraph(f_text, ENTRY1_STYLE)
854        contextdata.append([f_label,f_text])
855
856        f_label = trans(_('Entry Mode:'), portal_language)
857        f_label = Paragraph(f_label, ENTRY1_STYLE)
858        f_text = formatted_text(view.studymode_dict.get(
859            view.context.entry_mode))
860        f_text = Paragraph(f_text, ENTRY1_STYLE)
861        contextdata.append([f_label,f_text])
862
863        f_label = trans(_('Cumulative GPA:'), portal_language)
864        f_label = Paragraph(f_label, ENTRY1_STYLE)
865        f_text = formatted_text('%s (%s)' % (gpa, self.getClassFromCGPA(gpa)[1]))
866        f_text = Paragraph(f_text, ENTRY1_STYLE)
867        contextdata.append([f_label,f_text])
868
869        contexttable = Table(contextdata,style=SLIP_STYLE)
870        data.append(contexttable)
871
872        transcripttables = render_transcript_data(
873            view, tableheader, levels_data, lang=portal_language)
874        data.extend(transcripttables)
875
876        # Insert signatures
877        # XXX: We are using only sigs_in_footer in waeup.kofa, so we
878        # do not have a test for the following lines.
879        if signatures and not sigs_in_footer:
880            data.append(Spacer(1, 20))
881            # Render one signature table per signature to
882            # get date and signature in line.
883            for signature in signatures:
884                signaturetables = get_signature_tables(signature)
885                data.append(signaturetables[0])
886
887        view.response.setHeader(
888            'Content-Type', 'application/pdf')
889        try:
890            pdf_stream = creator.create_pdf(
891                data, None, doc_title, author=author, footer=footer_text,
892                note=note, sigs_in_footer=sigs_in_footer, topMargin=topMargin)
893        except IOError:
894            view.flash(_('Error in image file.'))
895            return view.redirect(view.url(view.context))
896        return pdf_stream
897
898    def maxCredits(self, studylevel):
899        """Return maximum credits.
900        At some universities maximum credits is not constant, it
901        depends on the student's study level. Set `maxCredits` None or 0
902        in order to deactivate the limitation.
903        """
904        return 50
905
906    def maxCreditsExceeded(self, studylevel, course):
907        max_credits = self.maxCredits(studylevel)
908        if max_credits and \
909            studylevel.total_credits + course.credits > max_credits:
910            return max_credits
911        return 0
912
913    def getBedCoordinates(self, bedticket):
914        """Return bed coordinates.
915        This method can be used to customize the `display_coordinates`
916        property method.
917        """
918        return bedticket.bed_coordinates
919
920    def clearance_disabled_message(self, student):
921        try:
922            session_config = grok.getSite()[
923                'configuration'][str(student.current_session)]
924        except KeyError:
925            return _('Session configuration object is not available.')
926        if not session_config.clearance_enabled:
927            return _('Clearance is disabled for this session.')
928        return None
929
930    VERDICTS_DICT = {
931        '0': _('(not yet)'),
932        'A': 'Successful student',
933        'B': 'Student with carryover courses',
934        'C': 'Student on probation',
935        }
936
937    SEPARATORS_DICT = {
938        }
939
940    SKIP_UPLOAD_VIEWLETS = ()
941
942    PWCHANGE_STATES = (ADMITTED,)
943
944    #: A tuple containing all exporter names referring to students or
945    #: subobjects thereof.
946    STUDENT_EXPORTER_NAMES = ('students', 'studentstudycourses',
947            'studentstudylevels', 'coursetickets',
948            'studentpayments', 'studentunpaidpayments',
949            'bedtickets', 'paymentsoverview',
950            'studylevelsoverview', 'combocard', 'bursary')
951
952    #: A tuple containing all exporter names needed for backing
953    #: up student data
954    STUDENT_BACKUP_EXPORTER_NAMES = ('students', 'studentstudycourses',
955            'studentstudylevels', 'coursetickets',
956            'studentpayments', 'bedtickets')
957
958    #: A prefix used when generating new student ids. Each student id will
959    #: start with this string. The default is 'K' for ``Kofa``.
960    STUDENT_ID_PREFIX = u'K'
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