示例#1
0
class ProgressReportPage(BrowserPage):

    render_invariant = False
    render_debug = False

    base_filename = 'export'

    message_title = _('export')

    task_progress = None
    overall_line_id = None

    def __init__(self, context, request):
        super(ProgressReportPage, self).__init__(context, request)
        self.makeProgress()

    def makeFileName(self, basename):
        if self.render_invariant:
            return '%s.xls' % basename
        timestamp = datetime.datetime.now().strftime('%y-%m-%d-%H-%M')
        return '%s_%s.xls' % (basename, timestamp)

    @property
    def filename(self):
        return self.makeFileName(self.base_filename)

    def makeProgress(self):
        task_id = getattr(self.request, 'task_id', None)
        self.task_progress = TaskProgress(task_id)

    def update(self):
        self.makeProgress()

    def updateOverall(self):
        if self.overall_line_id is None:
            return
        max_progress = 0.0
        overall = 0.0
        for lid, line in self.task_progress.lines.items():
            if (line.get('progress', None) is not None
                    and lid != self.overall_line_id):
                overall += line.progress
                max_progress += 1.0
        if max_progress > 0.0:
            overall /= max_progress
        self.task_progress('overall', progress=overall)

    def progress(self, importer, value):
        self.task_progress(importer, progress=value, active=True)
        self.updateOverall()

    def finish(self, importer):
        self.task_progress.finish(importer)
        self.updateOverall()
示例#2
0
class ProgressReportPage(BrowserPage):

    render_invariant = False
    render_debug = False

    base_filename = 'export'

    message_title = _('export')

    task_progress = None
    overall_line_id = None

    def __init__(self, context, request):
        super(ProgressReportPage, self).__init__(context, request)
        self.makeProgress()

    def makeFileName(self, basename):
        if self.render_invariant:
            return '%s.xls' % basename
        timestamp = datetime.datetime.now().strftime('%y-%m-%d-%H-%M')
        return '%s_%s.xls' % (basename, timestamp)

    @property
    def filename(self):
        return self.makeFileName(self.base_filename)

    def makeProgress(self):
        task_id = getattr(self.request, 'task_id', None)
        self.task_progress = TaskProgress(task_id)

    def update(self):
        self.makeProgress()

    def updateOverall(self):
        if self.overall_line_id is None:
            return
        max_progress = 0.0
        overall = 0.0
        for lid, line in self.task_progress.lines.items():
            if (line.get('progress', None) is not None and
                lid != self.overall_line_id):
                overall += line.progress
                max_progress += 1.0
        if max_progress > 0.0:
            overall /= max_progress
        self.task_progress('overall', progress=overall)

    def progress(self, importer, value):
        self.task_progress(importer, progress=value, active=True)
        self.updateOverall()

    def finish(self, importer):
        self.task_progress.finish(importer)
        self.updateOverall()
示例#3
0
 def makeProgress(self):
     self.task_progress = TaskProgress(None)
示例#4
0
class MegaExporter(SchoolTimetableExportView):

    overall_line_id = 'overall'

    def print_table(self, table, ws, row=0, col=0):
        for y, cells in enumerate(table):
            self.print_row(cells, ws, row=(row + y), col=col)
        return len(table)

    def print_row(self, cells, ws, row=0, col=0):
        for x, cell in enumerate(cells):
            self.write(ws, row, col + x, cell.data, **cell.style)

    def format_table(self,
                     fields,
                     items,
                     importer=None,
                     major_progress=(),
                     sort=True):
        headers = [Header(header) for header, style, getter in fields]
        rows = []
        total_items = len(removeSecurityProxy(items))
        for n, item in enumerate(items):
            row = [style(getter(item)) for header, style, getter in fields]
            rows.append(row)
            if importer is not None:
                self.progress(
                    importer,
                    normalized_progress(*(major_progress + (n, total_items))))
        if sort:
            rows.sort()
        return [headers] + rows

    def format_school_years(self):
        fields = [('ID', Text, attrgetter('__name__')),
                  ('Title', Text, attrgetter('title')),
                  ('Start', Date, attrgetter('first')),
                  ('End', Date, attrgetter('last'))]
        items = ISchoolYearContainer(self.context).values()
        result = self.format_table(fields,
                                   items,
                                   importer='export_school_years')
        return result

    def export_school_years(self, wb):
        self.task_progress.force('export_school_years', active=True)
        ws = wb.add_sheet("School Years")
        self.print_table(self.format_school_years(), ws)
        self.finish('export_school_years')

    def calculate_holidays_and_weekdays(self):

        work_days = 0.0

        days_of_week = {}
        for dow in range(7):
            days_of_week[dow] = [0, 0]

        school_years = ISchoolYearContainer(self.context).values()
        for school_year in school_years:
            terms = ITermContainer(school_year).values()
            for term in terms:
                for date in term:
                    if term.isSchoolday(date):
                        days_of_week[date.weekday()][0] += 1
                        work_days += 1
                    else:
                        days_of_week[date.weekday()][1] += 1

        if work_days == 0:
            return [[], list(range(7)), []]

        coefficients = [
            counts[0] / work_days
            for day, counts in sorted(days_of_week.items())
        ]

        # Weekends
        weekends = []
        for n, k in enumerate(coefficients):
            if k < 0.1:
                weekends.append(n)

        # Weekend exceptions and holidays
        holidays = []
        weekend_exceptions = []
        for school_year in school_years:
            terms = ITermContainer(school_year).values()
            for term in terms:
                for date in term:
                    if term.isSchoolday(date) and date.weekday() in weekends:
                        weekend_exceptions.append(date)
                    elif not term.isSchoolday(date) and date.weekday(
                    ) not in weekends:
                        holidays.append(date)

        holiday_ranges = merge_date_ranges(holidays)
        return [holiday_ranges, weekends, weekend_exceptions]

    def format_holidays(self, holidays):
        if not holidays:
            return []
        table = [[], [Header("Holidays")]]
        table.extend([[Date(start), Date(end)] for start, end in holidays])
        return table

    def format_weekends(self, weekends):
        if not weekends:
            return []

        table = [[], [Header("Weekends")]]
        weekdays = map(Text, [
            'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday',
            'Sunday'
        ])
        table.append(weekdays)
        table.append([
            weekday in weekends and Text('X') or Text('')
            for weekday in range(len(weekdays))
        ])
        return table

    def format_weekend_exceptions(self, working_weekends):
        if not working_weekends:
            return []

        table = [[], [Header("Working weekends")]]
        table.extend([[Date(day)] for day in working_weekends])
        return table

    def format_terms(self):
        fields = [('SchoolYear', Text, lambda t: t.__parent__.__name__),
                  ('ID', Text, attrgetter('__name__')),
                  ('Title', Text, attrgetter('title')),
                  ('Start', Date, attrgetter('first')),
                  ('End', Date, attrgetter('last'))]

        school_years = ISchoolYearContainer(self.context).values()
        items = []
        for year in school_years:
            items.extend([term for term in ITermContainer(year).values()])
        terms_table = self.format_table(fields, items, importer='export_terms')
        holidays, weekends, exceptions = self.calculate_holidays_and_weekdays()
        terms_table.extend(self.format_holidays(holidays))
        terms_table.extend(self.format_weekends(weekends))
        terms_table.extend(self.format_weekend_exceptions(exceptions))
        return terms_table

    def export_terms(self, wb):
        self.task_progress.force('export_terms', active=True)
        ws = wb.add_sheet("Terms")
        self.print_table(self.format_terms(), ws)
        self.finish('export_terms')

    def format_persons(self):
        fields = [('User Name', Text, attrgetter('__name__')),
                  ('Prefix', Text, attrgetter('prefix')),
                  ('First Name', Text, attrgetter('first_name')),
                  ('Middle Name', Text, attrgetter('middle_name')),
                  ('Last Name', Text, attrgetter('last_name')),
                  ('Suffix', Text, attrgetter('suffix')),
                  ('Preferred Name', Text, attrgetter('preferred_name')),
                  ('Birth Date', Date, attrgetter('birth_date')),
                  ('Gender', Text, attrgetter('gender')),
                  ('Password', Text, lambda p: None)]

        def demographics_getter(attribute):
            def getter(person):
                demographics = IDemographics(person)
                return demographics[attribute]

            return getter

        app = ISchoolToolApplication(None)
        demographics_fields = IDemographicsFields(app)
        for field in demographics_fields.values():
            title = field.title
            format = Text
            if isinstance(field, DateFieldDescription):
                format = Date
            getter = demographics_getter(field.name)
            fields.append((title, format, getter))

        items = self.context['persons'].values()
        return self.format_table(fields, items, importer='export_persons')

    def export_persons(self, wb):
        self.task_progress.force('export_persons', active=True)
        ws = wb.add_sheet("Persons")
        self.print_table(self.format_persons(), ws)
        self.finish('export_persons')

    def format_contact_persons(self):
        def contact_getter(attribute):
            def getter(contact):
                person = IBasicPerson(contact.__parent__, None)
                if person is None:
                    return getattr(contact, attribute)
                if attribute == '__name__':
                    return person.username
                return ''

            return getter

        fields = [('ID', Text, contact_getter('__name__')),
                  ('Prefix', Text, contact_getter('prefix')),
                  ('First Name', Text, contact_getter('first_name')),
                  ('Middle Name', Text, contact_getter('middle_name')),
                  ('Last Name', Text, contact_getter('last_name')),
                  ('Suffix', Text, contact_getter('suffix')),
                  ('Address line 1', Text, attrgetter('address_line_1')),
                  ('Address line 2', Text, attrgetter('address_line_2')),
                  ('City', Date, attrgetter('city')),
                  ('State', Date, attrgetter('state')),
                  ('Country', Date, attrgetter('country')),
                  ('Postal code', Date, attrgetter('postal_code')),
                  ('Home phone', Text, attrgetter('home_phone')),
                  ('Work phone', Text, attrgetter('work_phone')),
                  ('Mobile phone', Text, attrgetter('mobile_phone')),
                  ('Email', Text, attrgetter('email')),
                  ('Language', Text, attrgetter('language'))]

        items = []
        for person in self.context['persons'].values():
            items.append(IContact(person))
        for contact in IContactContainer(self.context).values():
            items.append(contact)

        return self.format_table(fields,
                                 items,
                                 importer='export_contacts',
                                 major_progress=(0, 2))

    def format_person_contacts(self, person, major_progress=()):
        contacts = IContactable(person).contacts
        rows = []
        for contact in contacts.all():
            row = []
            row.append(Text(person.username))
            target_person = IBasicPerson(contact.__parent__, None)
            if target_person is None:
                row.append(Text(contact.__name__))
            else:
                row.append(Text(target_person.username))

            state = contacts.state(contact)
            for x, (date, meaning, code) in enumerate(state):
                row.append(Date(date))
                row.append(Text(code))
            rows.append(row)
        return rows

    def format_contact_relationships(self):
        rows = []
        persons = self.context['persons']
        total = len(persons)
        for nperson, person in enumerate(persons.values()):
            person = removeSecurityProxy(person)
            person_rows = self.format_person_contacts(person,
                                                      major_progress=(1, 2,
                                                                      nperson,
                                                                      total))
            rows.extend(person_rows)
        rows.sort()

        headers = [
            Header('Person ID'),
            Header('Contact ID'),
            Header('Relationship')
        ]
        rows.insert(0, headers)

        return rows

    def export_contacts(self, wb):
        self.task_progress.force('export_contacts', active=True)
        ws = wb.add_sheet("Contact Persons")
        self.print_table(self.format_contact_persons(), ws)
        ws = wb.add_sheet("Contact Relationships")
        self.print_table(self.format_contact_relationships(), ws)
        self.finish('export_contacts')

    def format_resources(self):
        fields = [('ID', Text, attrgetter('__name__')),
                  ('Type', Text, lambda r: r.__class__.__name__),
                  ('Title', Text, attrgetter('title'))]
        items = self.context['resources'].values()
        return self.format_table(fields, items, importer='export_resources')

    def export_resources(self, wb):
        self.task_progress.force('export_resources', active=True)
        ws = wb.add_sheet("Resources")
        self.print_table(self.format_resources(), ws)
        self.finish('export_resources')

    def format_levels(self):
        fields = [('ID', Text, attrgetter('__name__')),
                  ('Title', Text, attrgetter('title'))]
        levels = ILevelContainer(self.context)
        items = levels.values()
        return self.format_table(fields,
                                 items,
                                 importer='export_levels',
                                 sort=False)

    def export_levels(self, wb):
        self.task_progress.force('export_levels', active=True)
        ws = wb.add_sheet("Grade Levels")
        self.print_table(self.format_levels(), ws)
        self.finish('export_levels')

    def format_courses(self):
        def get_course_level(course):
            return ', '.join([l.__name__ for l in course.levels])

        fields = [('School Year', Text, lambda c: ISchoolYear(c).__name__),
                  ('ID', Text, attrgetter('__name__')),
                  ('Title', Text, attrgetter('title')),
                  ('Description', Text, attrgetter('description')),
                  ('Local ID', Text, attrgetter('course_id')),
                  ('Government ID', Text, attrgetter('government_id')),
                  ('Credits', Text, attrgetter('credits')),
                  ('Grade Level ID', Text, get_course_level)]

        school_years = ISchoolYearContainer(self.context).values()
        items = []
        for year in school_years:
            items.extend([term for term in ICourseContainer(year).values()])
        return self.format_table(fields, items, importer='export_courses')

    def export_courses(self, wb):
        self.task_progress.force('export_courses', active=True)
        ws = wb.add_sheet("Courses")
        self.print_table(self.format_courses(), ws)
        self.finish('export_courses')

    def format_timetables(self, section, ws, offset):
        schedules = IScheduleContainer(section)
        if not schedules:
            return offset
        schedules = list(
            sorted(schedules.values(), key=lambda s: s.timetable.__name__))
        for schedule in schedules:
            timetable = schedule.timetable
            self.write_header(ws, offset, 0, "School Timetable")
            self.write(ws, offset, 1, timetable.__name__)
            offset += 1

            self.write(ws, offset, 0, "Consecutive periods as one")
            self.write(ws, offset, 1,
                       schedule.consecutive_periods_as_one and 'yes' or 'no')
            offset += 1

            self.write_header(ws, offset, 0, "Day")
            self.write_header(ws, offset, 1, "Period")
            offset += 1

            for period in schedule.periods:
                day = period.__parent__
                self.write(ws, offset, 0, day.title)
                self.write(ws, offset, 1, period.title)
                offset += 1
            offset += 1
        return offset

    def format_section(self, year, courses, term, section, ws, row):
        resources = [r.__name__ for r in section.resources]
        self.write(ws, row, 0, year.__name__)
        self.write(ws, row, 1, courses)
        self.write(ws, row, 2, term.__name__)
        self.write(ws, row, 3, section.__name__)
        if section.previous:
            self.write(ws, row, 4, section.previous.__name__)
        if section.next:
            self.write(ws, row, 5, section.next.__name__)
        self.write(ws, row, 6, section.title)
        if section.description:
            self.write(ws, row, 7, section.description)
        self.write(ws, row, 8, ', '.join(resources))

    def export_sections(self, wb):
        self.task_progress.force('export_sections', active=True)
        ws = wb.add_sheet("Sections")
        headers = [
            "School Year", "Courses", "Term", "Section ID", "Previous ID",
            "Next ID", "Title", "Description", "Resources"
        ]
        for index, header in enumerate(headers):
            self.write_header(ws, 0, index, header)

        sections = []
        for year in ISchoolYearContainer(self.context).values():
            for term in year.values():
                for section in ISectionContainer(term).values():
                    if not list(section.courses):
                        continue
                    courses = ', '.join([c.__name__ for c in section.courses])
                    sections.append((year, courses, term.first, term,
                                     section.__name__, section))

        row = 1
        sections.sort()
        n_sections = len(sections)
        for n, (year, courses, first, term, section_id,
                section) in enumerate(sections):
            self.format_section(year, courses, term, section, ws, row)
            self.progress('export_sections',
                          normalized_progress(n, n_sections))
            row += 1
        self.finish('export_sections')

    def format_membership_block(self, relationship, headers):
        items = sorted(relationship.all(), key=lambda item: item.__name__)
        if not items:
            return []
        table = [headers]
        for item in items:
            cells = [Text(item.__name__), Text('')]
            state = relationship.state(item)
            for x, (date, meaning, code) in enumerate(state):
                cells.append(Date(date))
                cells.append(Text(code))
            table.append(cells)
        table.append([])
        return table

    def export_section_enrollment(self, ws, year, term, section, row=0):
        row += self.print_table([
            [Header('School Year'),
             Header('Term'),
             Header('Section ID')],
            [Text(year.__name__),
             Text(term.__name__),
             Text(section.__name__)],
            [],
        ],
                                ws,
                                row=row)

        row += self.print_table(self.format_membership_block(
            section.instructors, [Header('Instructors')]),
                                ws,
                                row=row,
                                col=0)

        row += self.print_table(self.format_membership_block(
            section.members, [Header('Students')]),
                                ws,
                                row=row,
                                col=0)

        return row

    def export_sections_enrollment(self, wb):
        self.task_progress.force('export_sections_enrollment', active=True)
        ws = wb.add_sheet("SectionEnrollment")

        row = 0
        years = ISchoolYearContainer(self.context)
        total_years = len(years)
        for ny, year in enumerate(
                sorted(years.values(), key=lambda year: year.first)):
            total_terms = len(year)
            for nt, term in enumerate(
                    sorted(year.values(), key=lambda term: term.first)):
                sections = ISectionContainer(term)
                total_sections = len(sections)
                for ns, section in enumerate(
                        sorted(sections.values(),
                               key=lambda section: section.__name__)):
                    row = self.export_section_enrollment(ws,
                                                         year,
                                                         term,
                                                         section,
                                                         row=row)
                    self.progress(
                        'export_sections_enrollment',
                        normalized_progress(
                            ny,
                            total_years,
                            nt,
                            total_terms,
                            ns,
                            total_sections,
                        ))

        self.finish('export_sections_enrollment')

    def format_timetable_sections(self, year, timetable_sections, ws, row):
        headers = ["School Year", "Term", "Section ID"]
        for index, header in enumerate(headers):
            self.write_header(ws, row, index, header)
        row += 1

        for first, term, section_id, section in sorted(timetable_sections):
            self.write(ws, row, 0, year.__name__)
            self.write(ws, row, 1, term.__name__)
            self.write(ws, row, 2, section.__name__)
            row += 1
        return row + 1

    def format_timetables_block(self, timetables, ws, row):
        for timetable in timetables:
            parts = timetable.split(',')
            self.write_header(ws, row, 0, "Timetable")
            self.write(ws, row, 1, parts[0])
            self.write_header(ws, row, 2, "Consecutive")
            self.write(ws, row, 3, parts[1])
            row += 2

            self.write_header(ws, row, 0, "Day")
            self.write_header(ws, row, 1, "Period ID")
            row += 1

            parts = parts[2:]
            while parts:
                day, period = parts[:2]
                self.write(ws, row, 0, day)
                self.write(ws, row, 1, period)
                parts = parts[2:]
                row += 1
        return row + 1

    def export_section_timetables(self, wb):
        self.task_progress.force('export_section_timetables', active=True)
        ws = wb.add_sheet("SectionTimetables")

        year_sections = {}
        for year in ISchoolYearContainer(self.context).values():
            sections = year_sections[year] = {}
            for term in year.values():
                for section in ISectionContainer(term).values():
                    if not list(section.courses):
                        continue
                    timetables = []
                    for schedule in IScheduleContainer(section).values():
                        if schedule.timetable.__name__ is None:
                            # LP: #1281335
                            continue
                        parts = [schedule.timetable.__name__]
                        if schedule.consecutive_periods_as_one:
                            parts.append('yes')
                        else:
                            parts.append('no')
                        for period in schedule.periods:
                            day = period.__parent__
                            parts.append(day.title)
                            parts.append(period.title)
                        timetables.append(','.join(parts))
                    if not len(timetables):
                        continue
                    timetables = tuple(timetables)
                    timetable_sections = sections.setdefault(timetables, [])
                    timetable_sections.append(
                        (term.first, term, section.__name__, section))

        row = 0
        for ny, (year, sections) in enumerate(sorted(year_sections.items())):
            for nt, (timetables, timetable_sections) in enumerate(
                    sorted(sections.items())):
                row = self.format_timetable_sections(year, timetable_sections,
                                                     ws, row)
                row = self.format_timetables_block(timetables, ws, row)
                self.progress(
                    'export_section_timetables',
                    normalized_progress(ny, len(year_sections), nt,
                                        len(sections)))
        self.finish('export_section_timetables')

    def format_group(self, group, ws, offset):
        fields = [
            lambda i: ("Group Title", i.title, None), lambda i:
            ("ID", i.__name__, None), lambda i:
            ("School Year", ISchoolYear(i.__parent__).__name__, None),
            lambda i: ("Description", i.description, None)
        ]

        offset = self.listFields(group, fields, ws, offset)

        offset += self.print_table(self.format_membership_block(
            group.members, [Header('Members')]),
                                   ws,
                                   row=offset,
                                   col=0)

        offset += 1

        leaders = IAsset(group).leaders
        offset += self.print_table(self.format_membership_block(
            leaders, [Header('Leaders')]),
                                   ws,
                                   row=offset,
                                   col=0)

        return offset

    def export_groups(self, wb):
        self.task_progress.force('export_groups', active=True)
        ws = wb.add_sheet("Groups")
        school_years = sorted(ISchoolYearContainer(self.context).values(),
                              key=lambda s: s.first)
        row = 0
        for ny, school_year in enumerate(
                sorted(school_years, key=lambda i: i.last)):
            groups = IGroupContainer(school_year)
            for ng, group in enumerate(
                    sorted(groups.values(), key=lambda i: i.__name__)):
                row = self.format_group(group, ws, row) + 1
                self.progress(
                    'export_groups',
                    normalized_progress(ny, len(school_years), ng,
                                        len(groups)))
        self.finish('export_groups')

    def makeProgress(self):
        self.task_progress = TaskProgress(None)

    def addImporters(self, progress):
        progress.add('export_school_years',
                     active=False,
                     title=_('School Years'),
                     progress=0.0)
        progress.add('export_terms',
                     active=False,
                     title=_('Terms'),
                     progress=0.0)
        progress.add('export_school_timetables',
                     active=False,
                     title=_('School Timetables'),
                     progress=0.0)
        progress.add('export_resources',
                     active=False,
                     title=_('Resources'),
                     progress=0.0)
        progress.add('export_levels',
                     active=False,
                     title=_('Grade Levels'),
                     progress=0.0)
        progress.add('export_persons',
                     active=False,
                     title=_('Persons'),
                     progress=0.0)
        progress.add('export_contacts',
                     active=False,
                     title=_('Contacts'),
                     progress=0.0)
        progress.add('export_courses',
                     active=False,
                     title=_('Courses'),
                     progress=0.0)
        progress.add('export_sections',
                     active=False,
                     title=_('Sections'),
                     progress=0.0)
        progress.add('export_sections_enrollment',
                     active=False,
                     title=_('Section Enrollment'),
                     progress=0.0)
        progress.add('export_section_timetables',
                     active=False,
                     title=_('Section Schedules'),
                     progress=0.0)
        progress.add('export_groups',
                     active=False,
                     title=_('Groups'),
                     progress=0.0)
        progress.add('overall', title=_('School Data'), progress=0.0)

    def update(self):
        super(MegaExporter, self).update()
        self.addImporters(self.task_progress)

    def render(self, workbook):
        datafile = StringIO()
        workbook.save(datafile)
        data = datafile.getvalue()
        self.setUpHeaders(data)
        return data

    def __call__(self):
        self.makeProgress()
        self.task_progress.title = _("Exporting school data")
        self.addImporters(self.task_progress)

        wb = xlwt.Workbook()
        self.export_school_years(wb)
        self.export_terms(wb)
        self.export_school_timetables(wb)
        self.export_resources(wb)
        self.export_levels(wb)
        self.export_persons(wb)
        self.export_contacts(wb)
        self.export_courses(wb)
        self.export_sections(wb)
        self.export_sections_enrollment(wb)
        self.export_section_timetables(wb)
        self.export_groups(wb)
        self.task_progress.title = _("Export complete")
        self.task_progress.force('overall', progress=1.0)
        data = self.render(wb)
        return data
示例#5
0
 def makeProgress(self):
     task_id = getattr(self.request, 'task_id', None)
     self.task_progress = TaskProgress(task_id)
示例#6
0
 def makeProgress(self):
     task_id = getattr(self.request, 'task_id', None)
     self.task_progress = TaskProgress(task_id)
示例#7
0
 def makeProgress(self):
     self.task_progress = TaskProgress(None)
示例#8
0
class MegaExporter(SchoolTimetableExportView):

    overall_line_id = 'overall'

    def print_table(self, table, ws, row=0, col=0):
        for y, cells in enumerate(table):
            self.print_row(cells, ws, row=(row+y), col=col)
        return len(table)

    def print_row(self, cells, ws, row=0, col=0):
        for x, cell in enumerate(cells):
            self.write(ws, row, col+x, cell.data, **cell.style)

    def format_table(self, fields, items, importer=None, major_progress=(),
                     sort=True):
        headers = [Header(header)
                   for header, style, getter in fields]
        rows = []
        total_items = len(removeSecurityProxy(items))
        for n, item in enumerate(items):
            row = [style(getter(item))
                   for header, style, getter in fields]
            rows.append(row)
            if importer is not None:
                self.progress(importer, normalized_progress(
                        *(major_progress + (n, total_items))))
        if sort:
            rows.sort()
        return [headers] + rows

    def format_school_years(self):
        fields = [('ID', Text, attrgetter('__name__')),
                  ('Title', Text, attrgetter('title')),
                  ('Start', Date, attrgetter('first')),
                  ('End', Date, attrgetter('last'))]
        items = ISchoolYearContainer(self.context).values()
        result = self.format_table(fields, items, importer='export_school_years')
        return result

    def export_school_years(self, wb):
        self.task_progress.force('export_school_years', active=True)
        ws = wb.add_sheet("School Years")
        self.print_table(self.format_school_years(), ws)
        self.finish('export_school_years')

    def calculate_holidays_and_weekdays(self):

        work_days = 0.0

        days_of_week = {}
        for dow in range(7):
            days_of_week[dow] = [0, 0]

        school_years = ISchoolYearContainer(self.context).values()
        for school_year in school_years:
            terms = ITermContainer(school_year).values()
            for term in terms:
                for date in term:
                    if term.isSchoolday(date):
                        days_of_week[date.weekday()][0] += 1
                        work_days += 1
                    else:
                        days_of_week[date.weekday()][1] += 1

        if work_days == 0:
            return [[], list(range(7)), []]

        coefficients = [counts[0] / work_days
                        for day, counts in sorted(days_of_week.items())]

        # Weekends
        weekends = []
        for n, k in enumerate(coefficients):
            if k < 0.1:
                weekends.append(n)

        # Weekend exceptions and holidays
        holidays = []
        weekend_exceptions = []
        for school_year in school_years:
            terms = ITermContainer(school_year).values()
            for term in terms:
                for date in term:
                    if term.isSchoolday(date) and date.weekday() in weekends:
                        weekend_exceptions.append(date)
                    elif not term.isSchoolday(date) and date.weekday() not in weekends:
                        holidays.append(date)

        holiday_ranges = merge_date_ranges(holidays)
        return [holiday_ranges, weekends, weekend_exceptions]

    def format_holidays(self, holidays):
        if not holidays:
            return []
        table = [[], [Header("Holidays")]]
        table.extend([[Date(start), Date(end)]
                      for start, end in holidays])
        return table

    def format_weekends(self, weekends):
        if not weekends:
            return []

        table = [[], [Header("Weekends")]]
        weekdays = map(Text, ['Monday',
                              'Tuesday',
                              'Wednesday',
                              'Thursday',
                              'Friday',
                              'Saturday',
                              'Sunday'])
        table.append(weekdays)
        table.append([weekday in weekends and Text('X') or Text('')
                      for weekday in range(len(weekdays))])
        return table

    def format_weekend_exceptions(self, working_weekends):
        if not working_weekends:
            return []

        table = [[], [Header("Working weekends")]]
        table.extend([[Date(day)]
                      for day in working_weekends])
        return table

    def format_terms(self):
        fields = [('SchoolYear', Text, lambda t: t.__parent__.__name__),
                  ('ID', Text, attrgetter('__name__')),
                  ('Title', Text, attrgetter('title')),
                  ('Start', Date, attrgetter('first')),
                  ('End', Date, attrgetter('last'))]

        school_years = ISchoolYearContainer(self.context).values()
        items = []
        for year in school_years:
            items.extend([term for term in
                          ITermContainer(year).values()])
        terms_table = self.format_table(fields, items, importer='export_terms')
        holidays, weekends, exceptions = self.calculate_holidays_and_weekdays()
        terms_table.extend(self.format_holidays(holidays))
        terms_table.extend(self.format_weekends(weekends))
        terms_table.extend(self.format_weekend_exceptions(exceptions))
        return terms_table

    def export_terms(self, wb):
        self.task_progress.force('export_terms', active=True)
        ws = wb.add_sheet("Terms")
        self.print_table(self.format_terms(), ws)
        self.finish('export_terms')

    def format_persons(self):
        fields = [('User Name', Text, attrgetter('__name__')),
                  ('Prefix', Text, attrgetter('prefix')),
                  ('First Name', Text, attrgetter('first_name')),
                  ('Middle Name', Text, attrgetter('middle_name')),
                  ('Last Name', Text, attrgetter('last_name')),
                  ('Suffix', Text, attrgetter('suffix')),
                  ('Preferred Name', Text, attrgetter('preferred_name')),
                  ('Birth Date', Date, attrgetter('birth_date')),
                  ('Gender', Text, attrgetter('gender')),
                  ('Password', Text, lambda p: None)]

        def demographics_getter(attribute):
            def getter(person):
                demographics = IDemographics(person)
                return demographics[attribute]
            return getter

        app = ISchoolToolApplication(None)
        demographics_fields = IDemographicsFields(app)
        for field in demographics_fields.values():
            title = field.title
            format = Text
            if isinstance(field, DateFieldDescription):
                format = Date
            getter = demographics_getter(field.name)
            fields.append((title, format, getter))

        items = self.context['persons'].values()
        return self.format_table(fields, items, importer='export_persons')

    def export_persons(self, wb):
        self.task_progress.force('export_persons', active=True)
        ws = wb.add_sheet("Persons")
        self.print_table(self.format_persons(), ws)
        self.finish('export_persons')

    def format_contact_persons(self):
        def contact_getter(attribute):
            def getter(contact):
                person = IBasicPerson(contact.__parent__, None)
                if person is None:
                    return getattr(contact, attribute)
                if attribute == '__name__':
                    return person.username
                return ''
            return getter

        fields = [('ID', Text, contact_getter('__name__')),
                  ('Prefix', Text, contact_getter('prefix')),
                  ('First Name', Text, contact_getter('first_name')),
                  ('Middle Name', Text, contact_getter('middle_name')),
                  ('Last Name', Text, contact_getter('last_name')),
                  ('Suffix', Text, contact_getter('suffix')),
                  ('Address line 1', Text, attrgetter('address_line_1')),
                  ('Address line 2', Text, attrgetter('address_line_2')),
                  ('City', Date, attrgetter('city')),
                  ('State', Date, attrgetter('state')),
                  ('Country', Date, attrgetter('country')),
                  ('Postal code', Date, attrgetter('postal_code')),
                  ('Home phone', Text, attrgetter('home_phone')),
                  ('Work phone', Text, attrgetter('work_phone')),
                  ('Mobile phone', Text, attrgetter('mobile_phone')),
                  ('Email', Text, attrgetter('email')),
                  ('Language', Text, attrgetter('language'))]

        items = []
        for person in self.context['persons'].values():
            items.append(IContact(person))
        for contact in IContactContainer(self.context).values():
            items.append(contact)

        return self.format_table(fields, items, importer='export_contacts',
                                 major_progress=(0,2))

    def format_person_contacts(self, person, major_progress=()):
        contacts = IContactable(person).contacts
        rows = []
        for contact in contacts.all():
            row = []
            row.append(Text(person.username))
            target_person = IBasicPerson(contact.__parent__, None)
            if target_person is None:
                row.append(Text(contact.__name__))
            else:
                row.append(Text(target_person.username))

            state = contacts.state(contact)
            for x, (date, meaning, code) in enumerate(state):
                row.append(Date(date))
                row.append(Text(code))
            rows.append(row)
        return rows

    def format_contact_relationships(self):
        rows = []
        persons = self.context['persons']
        total = len(persons)
        for nperson, person in enumerate(persons.values()):
            person = removeSecurityProxy(person)
            person_rows = self.format_person_contacts(
                person, major_progress=(1, 2, nperson, total))
            rows.extend(person_rows)
        rows.sort()

        headers = [Header('Person ID'), Header('Contact ID'), Header('Relationship')]
        rows.insert(0, headers)

        return rows

    def export_contacts(self, wb):
        self.task_progress.force('export_contacts', active=True)
        ws = wb.add_sheet("Contact Persons")
        self.print_table(self.format_contact_persons(), ws)
        ws = wb.add_sheet("Contact Relationships")
        self.print_table(self.format_contact_relationships(), ws)
        self.finish('export_contacts')

    def format_resources(self):
        fields = [('ID', Text, attrgetter('__name__')),
                  ('Type', Text, lambda r: r.__class__.__name__),
                  ('Title', Text, attrgetter('title'))]
        items = self.context['resources'].values()
        return self.format_table(fields, items, importer='export_resources')

    def export_resources(self, wb):
        self.task_progress.force('export_resources', active=True)
        ws = wb.add_sheet("Resources")
        self.print_table(self.format_resources(), ws)
        self.finish('export_resources')

    def format_levels(self):
        fields = [('ID', Text, attrgetter('__name__')),
                  ('Title', Text, attrgetter('title'))]
        levels = ILevelContainer(self.context)
        items = levels.values()
        return self.format_table(fields, items, importer='export_levels',
                                 sort=False)

    def export_levels(self, wb):
        self.task_progress.force('export_levels', active=True)
        ws = wb.add_sheet("Grade Levels")
        self.print_table(self.format_levels(), ws)
        self.finish('export_levels')

    def format_courses(self):
        def get_course_level(course):
            if course.levels:
                return ', '.join([l.__name__ for l in course.levels])
        fields = [('School Year', Text, lambda c: ISchoolYear(c).__name__),
                  ('ID', Text, attrgetter('__name__')),
                  ('Title', Text, attrgetter('title')),
                  ('Description', Text, attrgetter('description')),
                  ('Local ID', Text, attrgetter('course_id')),
                  ('Government ID', Text, attrgetter('government_id')),
                  ('Credits', Text, attrgetter('credits')),
                  ('Grade Level ID', Text, get_course_level)]

        school_years = ISchoolYearContainer(self.context).values()
        items = []
        for year in school_years:
            items.extend([term for term in
                          ICourseContainer(year).values()])
        return self.format_table(fields, items, importer='export_courses')

    def export_courses(self, wb):
        self.task_progress.force('export_courses', active=True)
        ws = wb.add_sheet("Courses")
        self.print_table(self.format_courses(), ws)
        self.finish('export_courses')

    def format_timetables(self, section, ws, offset):
        schedules = IScheduleContainer(section)
        if not schedules:
            return offset
        schedules = list(sorted(schedules.values(),
                                key=lambda s: s.timetable.__name__))
        for schedule in schedules:
            timetable = schedule.timetable
            self.write_header(ws, offset, 0,  "School Timetable")
            self.write(ws, offset, 1,  timetable.__name__)
            offset += 1

            self.write(ws, offset, 0,  "Consecutive periods as one")
            self.write(ws, offset, 1,
                       schedule.consecutive_periods_as_one and 'yes' or 'no')
            offset += 1

            self.write_header(ws, offset, 0,  "Day")
            self.write_header(ws, offset, 1,  "Period")
            offset += 1

            for period in schedule.periods:
                day = period.__parent__
                self.write(ws, offset, 0,  day.title)
                self.write(ws, offset, 1,  period.title)
                offset += 1
            offset += 1
        return offset

    def format_section(self, year, courses, term, section, ws, row):
        resources = [r.__name__ for r in section.resources]
        self.write(ws, row, 0, year.__name__)
        self.write(ws, row, 1, courses)
        self.write(ws, row, 2, term.__name__)
        self.write(ws, row, 3, section.__name__)
        if section.previous:
            self.write(ws, row, 4, section.previous.__name__)
        if section.next:
            self.write(ws, row, 5, section.next.__name__)
        self.write(ws, row, 6, section.title)
        if section.description:
            self.write(ws, row, 7, section.description)
        self.write(ws, row, 8, ', '.join(resources))

    def export_sections(self, wb):
        self.task_progress.force('export_sections', active=True)
        ws = wb.add_sheet("Sections")
        headers = ["School Year", "Courses", "Term", "Section ID",
                   "Previous ID", "Next ID", "Title", "Description",
                   "Resources"]
        for index, header in enumerate(headers):
            self.write_header(ws, 0, index, header)

        sections = []
        for year in ISchoolYearContainer(self.context).values():
            for term in year.values():
                for section in ISectionContainer(term).values():
                    if not list(section.courses):
                        continue
                    courses = ', '.join([c.__name__ for c in section.courses])
                    sections.append((year, courses, term.first, term,
                                     section.__name__, section))

        row = 1
        sections.sort()
        n_sections = len(sections)
        for n, (year, courses, first, term, section_id, section) in enumerate(sections):
            self.format_section(year, courses, term, section, ws, row)
            self.progress('export_sections', normalized_progress(
                    n, n_sections))
            row += 1
        self.finish('export_sections')

    def format_membership_block(self, relationship, headers):
        items = sorted(relationship.all(),
                       key=lambda item: item.__name__)
        if not items:
            return []
        table = [headers]
        for item in items:
            cells = [Text(item.__name__), Text('')]
            state = relationship.state(item)
            for x, (date, meaning, code) in enumerate(state):
                cells.append(Date(date))
                cells.append(Text(code))
            table.append(cells)
        table.append([])
        return table

    def export_section_enrollment(self, ws, year, term, section, row=0):
        row += self.print_table([
            [Header('School Year'), Header('Term'), Header('Section ID')],
            [Text(year.__name__), Text(term.__name__), Text(section.__name__)],
            [],
            ], ws, row=row)

        row += self.print_table(
            self.format_membership_block(section.instructors, [Header('Instructors')]),
            ws, row=row, col=0)

        row += self.print_table(
            self.format_membership_block(section.members, [Header('Students')]),
            ws, row=row, col=0)

        return row

    def export_sections_enrollment(self, wb):
        self.task_progress.force('export_sections_enrollment', active=True)
        ws = wb.add_sheet("SectionEnrollment")

        row = 0
        years = ISchoolYearContainer(self.context)
        total_years = len(years)
        for ny, year in enumerate(sorted(years.values(), key=lambda year: year.first)):
            total_terms = len(year)
            for nt, term in enumerate(sorted(year.values(), key=lambda term: term.first)):
                sections = ISectionContainer(term)
                total_sections = len(sections)
                for ns, section in enumerate(sorted(sections.values(),
                                                    key=lambda section: section.__name__)):
                    row = self.export_section_enrollment(
                        ws, year, term, section, row=row)
                    self.progress(
                        'export_sections_enrollment',
                        normalized_progress(
                            ny, total_years,
                            nt, total_terms,
                            ns, total_sections,
                            ))

        self.finish('export_sections_enrollment')

    def format_timetable_sections(self, year, timetable_sections, ws, row):
        headers = ["School Year", "Term", "Section ID"]
        for index, header in enumerate(headers):
            self.write_header(ws, row, index, header)
        row += 1

        for first, term, section_id, section in sorted(timetable_sections):
            self.write(ws, row, 0, year.__name__)
            self.write(ws, row, 1, term.__name__)
            self.write(ws, row, 2, section.__name__)
            row += 1
        return row + 1

    def format_timetables_block(self, timetables, ws, row):
        for timetable in timetables:
            parts = timetable.split(',')
            self.write_header(ws, row, 0, "Timetable")
            self.write(ws, row, 1, parts[0])
            self.write_header(ws, row, 2, "Consecutive")
            self.write(ws, row, 3, parts[1])
            row += 2

            self.write_header(ws, row, 0, "Day")
            self.write_header(ws, row, 1, "Period ID")
            row += 1

            parts = parts[2:]
            while parts:
                day, period = parts[:2]
                self.write(ws, row, 0, day)
                self.write(ws, row, 1, period)
                parts = parts[2:]
                row += 1
        return row + 1

    def export_section_timetables(self, wb):
        self.task_progress.force('export_section_timetables', active=True)
        ws = wb.add_sheet("SectionTimetables")

        year_sections = {}
        for year in ISchoolYearContainer(self.context).values():
            sections = year_sections[year] = {}
            for term in year.values():
                for section in ISectionContainer(term).values():
                    if not list(section.courses):
                        continue
                    timetables = []
                    for schedule in IScheduleContainer(section).values():
                        if schedule.timetable.__name__ is None:
                            # LP: #1281335
                            continue
                        parts = [schedule.timetable.__name__]
                        if schedule.consecutive_periods_as_one:
                            parts.append('yes')
                        else:
                            parts.append('no')
                        for period in schedule.periods:
                            day = period.__parent__
                            parts.append(day.title)
                            parts.append(period.title)
                        timetables.append(','.join(parts))
                    if not len(timetables):
                        continue
                    timetables = tuple(timetables)
                    timetable_sections = sections.setdefault(timetables, [])
                    timetable_sections.append((term.first, term,
                                               section.__name__, section))

        row = 0
        for ny, (year, sections) in enumerate(sorted(year_sections.items())):
            for nt, (timetables, timetable_sections) in enumerate(sorted(sections.items())):
                row = self.format_timetable_sections(year, timetable_sections,
                                                     ws, row)
                row = self.format_timetables_block(timetables, ws, row)
                self.progress('export_section_timetables', normalized_progress(
                        ny, len(year_sections), nt, len(sections)
                        ))
        self.finish('export_section_timetables')

    def format_group(self, group, ws, offset):
        fields = [lambda i: ("Group Title", i.title, None),
                  lambda i: ("ID", i.__name__, None),
                  lambda i: ("School Year", ISchoolYear(i.__parent__).__name__, None),
                  lambda i: ("Description", i.description, None)]

        offset = self.listFields(group, fields, ws, offset)

        offset += self.print_table(
            self.format_membership_block(group.members, [Header('Members')]),
            ws, row=offset, col=0)

        offset += 1

        leaders = IAsset(group).leaders
        offset += self.print_table(
            self.format_membership_block(leaders, [Header('Leaders')]),
            ws, row=offset, col=0)

        return offset

    def export_groups(self, wb):
        self.task_progress.force('export_groups', active=True)
        ws = wb.add_sheet("Groups")
        school_years = sorted(ISchoolYearContainer(self.context).values(),
                              key=lambda s: s.first)
        row = 0
        for ny, school_year in enumerate(sorted(school_years, key=lambda i: i.last)):
            groups = IGroupContainer(school_year)
            for ng, group in enumerate(sorted(groups.values(), key=lambda i: i.__name__)):
                row = self.format_group(group, ws, row) + 1
                self.progress('export_groups', normalized_progress(
                        ny, len(school_years), ng, len(groups)
                        ))
        self.finish('export_groups')

    def makeProgress(self):
        self.task_progress = TaskProgress(None)

    def addImporters(self, progress):
        progress.add('export_school_years', active=False,
                     title=_('School Years'), progress=0.0)
        progress.add('export_terms', active=False,
                     title=_('Terms'), progress=0.0)
        progress.add('export_school_timetables', active=False,
                     title=_('School Timetables'), progress=0.0)
        progress.add('export_resources', active=False,
                     title=_('Resources'), progress=0.0)
        progress.add('export_levels', active=False,
                     title=_('Grade Levels'), progress=0.0)
        progress.add('export_persons', active=False,
                     title=_('Persons'), progress=0.0)
        progress.add('export_contacts', active=False,
                     title=_('Contacts'), progress=0.0)
        progress.add('export_courses', active=False,
                     title=_('Courses'), progress=0.0)
        progress.add('export_sections', active=False,
                     title=_('Sections'), progress=0.0)
        progress.add('export_sections_enrollment', active=False,
                     title=_('Section Enrollment'), progress=0.0)
        progress.add('export_section_timetables', active=False,
                     title=_('Section Schedules'), progress=0.0)
        progress.add('export_groups', active=False,
                     title=_('Groups'), progress=0.0)
        progress.add('overall',
                     title=_('School Data'), progress=0.0)

    def update(self):
        super(MegaExporter, self).update()
        self.addImporters(self.task_progress)

    def render(self, workbook):
        datafile = StringIO()
        workbook.save(datafile)
        data = datafile.getvalue()
        self.setUpHeaders(data)
        return data

    def __call__(self):
        self.makeProgress()
        self.task_progress.title = _("Exporting school data")
        self.addImporters(self.task_progress)

        wb = xlwt.Workbook()
        self.export_school_years(wb)
        self.export_terms(wb)
        self.export_school_timetables(wb)
        self.export_resources(wb)
        self.export_levels(wb)
        self.export_persons(wb)
        self.export_contacts(wb)
        self.export_courses(wb)
        self.export_sections(wb)
        self.export_sections_enrollment(wb)
        self.export_section_timetables(wb)
        self.export_groups(wb)
        self.task_progress.title = _("Export complete")
        self.task_progress.force('overall', progress=1.0)
        data = self.render(wb)
        return data