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# -*- coding: utf-8 -*- 

from math import ceil, floor 

import json 

import zipfile 

import csv 

from io import StringIO 

from itertools import groupby 

from pathos.multiprocessing import ProcessingPool as Pool 

 

import gpg 

from django.db.models import F, Value 

from dateutil.relativedelta import relativedelta 

from django.conf import settings 

from django.core.mail import EmailMessage 

from django.db.models import Q, Sum 

from django.db.models.functions import Coalesce 

from django.http import JsonResponse 

from django.shortcuts import HttpResponse, render 

from django.template.loader import select_template, render_to_string 

from django.template import Context 

from django.db.models.functions import Cast, Concat 

from django.db.models import FloatField 

from io import BytesIO 

from tabulate import tabulate 

from weasyprint import HTML 

from PyPDF2 import PdfFileMerger 

 

from ROOT.helper import i_request, str2bool 

from ROOT.settings import ( 

EMAIL_HOST_USER, EMAIL_MANAGING_DIRECTOR, 

GPG_HOST_USER, GPG_MANAGING_DIRECTOR, GPG_HOME, COUNTRY 

) 

from members.countryfield import COUNTRIES 

from members.models import EmailToMember, Erfa, Member, send_or_refresh_data_record, TemplateError, Person, \ 

DeliveryNumber, EmailAddress, Subscriber, AbstimmungToken 

from members.forms_pa_select import AddressLabelForm 

from other.scheduler import * 

 

RETURN_TYPE_JSON = 'json' 

RETURN_TYPE_HTML = 'html' 

 

 

def _get_return_type(request): 

return_as = RETURN_TYPE_JSON 

if 'return_as' in i_request(request): 

return_as = i_request(request)['return_as'] 

return return_as 

 

 

def country_analysis(request): 

return_as = _get_return_type(request) 

country_dict = {} 

 

for member in Member.objects.members_only(): 

if member.address_country not in country_dict: 

 

country_name = '' 

for countryPair in COUNTRIES: 

if countryPair[0] == member.address_country: 

country_name = countryPair[1] 

country_dict[member.address_country] = { 

'country': member.address_country, 

'country_name': country_name, 

'members': 0 

} 

country_dict[member.address_country]['members'] += 1 

 

if return_as == RETURN_TYPE_JSON: 

json_list = [] 

for countryKey in sorted(country_dict): 

json_list.append([ 

countryKey, country_dict[countryKey]['country_name'], 

country_dict[countryKey]['members'] 

]) 

 

return HttpResponse(json.dumps(json_list), content_type='application/json') 

 

return HttpResponse('BAD FORMAT', content_type='text/html') 

 

 

def zip_analysis(_): 

national_members = Member.objects.filter(address_country=COUNTRY, address_unknown=0) 

postal_codes = (member.get_plz() for member in national_members) 

 

# sort out members without address, but no address_unknown flag 

postal_codes = (postal_code for postal_code in postal_codes if postal_code != '') 

 

postal_codes_count = groupby(sorted(postal_codes), lambda x: str(x)[:2]) 

postal_codes_count_dict = {k: len(list(v)) for k, v in postal_codes_count} 

 

result = {'total_members': national_members.count(), 'zip_codes': postal_codes_count_dict} 

 

return JsonResponse(result) 

 

 

def member_queue_data_record_email(request): 

""" 

Send a data record email to the specified Member(s) no matter if anything in their data set changed. Will refresh 

already queued emails instead of queueing multiple emails. 

:param request: Should be a GET request with one or more parameters 'chaos_number', being the chaos_number of a 

Member 

:return: A JSON string with a dictionary of each chaos number paired with either 'queued' or 'not found' 

""" 

response = {} 

for chaos_number in i_request(request).getlist('chaos_number'): 

try: 

member = Member.objects.members_only().get(chaos_number=chaos_number) 

send_or_refresh_data_record(member) 

response[chaos_number] = 'queued' 

except Member.DoesNotExist: 

response[chaos_number] = 'not found' 

return HttpResponse(json.dumps(response), content_type='application/json') 

 

 

def member_reactivate(request): 

response = {} 

for chaos_number in i_request(request).getlist('chaos_number'): 

try: 

member = Member.objects.members_only().get(chaos_number=chaos_number, is_active=False) 

member.is_active = True # Changing the is_active state and saving sets also the last_paid_date 

member.save() 

response[chaos_number] = 'reactivated' 

except Member.DoesNotExist: 

response[chaos_number] = 'not found or already active' 

return HttpResponse(json.dumps(response), content_type='application/json') 

 

 

def billing_cycle(request): 

""" 

:param request: 

:return: HttpResponse (json) 

""" 

del request 

 

booked = map(lambda member: {'member': str(member), 

'memberName': member.get_name(), 

'balance': member.account_balance} if member.execute_payment_if_due() else None, 

Member.objects.all()) 

booked = list(filter(lambda x: x is not None, booked)) 

 

return HttpResponse(json.dumps(booked), content_type='application/json') 

 

 

@daily() 

def billing_cycle_cron(): 

for member in Member.objects.all(): 

member.execute_payment_if_due() 

 

 

@daily() 

def remove_run_out_subscribers(): 

for subscriber in Subscriber.objects.all(): 

if not subscriber.will_receive_issue(settings.NEXT_DATENSCHLEUDER_ISSUE): 

subscriber.delete() 

 

 

def mail_send_next(_): 

mail_to_send = EmailToMember.objects.first() 

if mail_to_send: 

response = mail_to_send.send() 

else: 

response = {'state': 'nothing to send'} 

return HttpResponse(json.dumps(response), content_type='application/json') 

 

 

def mail_send_all(request): 

 

response = [mail.send() for mail in EmailToMember.objects.all()] 

 

if len(response) == 0: 

response = {'state': 'nothing to send'} 

 

return HttpResponse(json.dumps(response), content_type='application/json') 

 

 

def pgp_test(_): 

with gpg.Context(armor=True) as c: 

c.set_engine_info(gpg.constants.protocol.OpenPGP, home_dir=settings.GPG_HOME) 

 

# Sender-Pub-Key verfügbar? 

try: 

pub_key = c.get_key(settings.GPG_HOST_USER) 

except Exception as ex: 

error = """The sender key cannot be loaded: 

{} 

Please check: 

* Is the fingerprint '{}' set in GPG_HOST_USER correct? 

* Is the key imported into the keyring stored under '{}' as defined in GPG_HOME? 

GPG_HOST_USER and GPG_HOME are defined in ROOT/ROOT/settings.py or ROOT/ROOT/settings_production.py 

A key can be imported to the correct keyring like this: 

'gpg --homedir {} --import key.asc' 

If the path to your GPG homedir is relative, make sure you're calling gpg in the correct working directory""".format( 

ex, settings.GPG_HOST_USER, settings.GPG_HOME, settings.GPG_HOME) 

return JsonResponse({'error': error}) 

 

# Sender-Private-Key verfügbar? 

try: 

priv_key = c.get_key(settings.GPG_HOST_USER, secret=True) 

except Exception as ex: 

error = """The sender private key cannot be loaded: 

{} 

Please check: 

* Does the key with the fingerprint '{}' as set in GPG_HOST_USER have a private key? 

* Is that private key also present in the keyring stored under '{}' as defined in GPG_HOME? 

GPG_HOST_USER and GPG_HOME are defined in ROOT/ROOT/settings.py or ROOT/ROOT/settings_production.py 

A key can be imported to the correct keyring like this: 

'gpg --homedir {} --import key.asc' 

If the path to your GPG homedir is relative, make sure you're calling gpg in the correct working directory""".format( 

ex, settings.GPG_HOST_USER, settings.GPG_HOME, settings.GPG_HOME) 

return JsonResponse({'error': error}) 

 

if pub_key.expired: 

error = """The public key '{}' has expired.""".format(settings.GPG_HOST_USER) 

return JsonResponse({'error': error}) 

 

if priv_key.expired: 

error = """The private key '{}' has expired.""".format(settings.GPG_HOST_USER) 

return JsonResponse({'error': error}) 

 

if pub_key.disabled: 

error = """The public key '{}' is disabled.""".format(settings.GPG_HOST_USER) 

return JsonResponse({'error': error}) 

 

if priv_key.disabled: 

error = """The private key '{}' is disabled.""".format(settings.GPG_HOST_USER) 

return JsonResponse({'error': error}) 

 

if pub_key.revoked: 

error = """The public key '{}' has been revoked.""".format(settings.GPG_HOST_USER) 

return JsonResponse({'error': error}) 

 

if priv_key.revoked: 

error = """The private key '{}' has been revoked.""".format(settings.GPG_HOST_USER) 

return JsonResponse({'error': error}) 

 

if pub_key.invalid: 

error = """The public key '{}' is invalid.""".format(settings.GPG_HOST_USER) 

return JsonResponse({'error': error}) 

 

if priv_key.invalid: 

error = """The private key '{}' is invalid.""".format(settings.GPG_HOST_USER) 

return JsonResponse({'error': error}) 

 

# Signieren mit dem Sender-Key möglich? 

c.signers = [priv_key] 

try: 

_, sign_result = c.sign('T€st'.encode()) 

except Exception as ex: 

error = """The sender private key failed at signing a message: 

{} 

{}""".format(ex, sign_result) 

return JsonResponse({'error': error}) 

 

# Verschlüsseln an den Sender-Key möglich? 

try: 

_, result, _ = c.encrypt('T€st'.encode(), recipients=[pub_key], sign=False, 

always_trust=True) 

except Exception as ex: 

error = """The sender public key failed at encrypting a message: 

{} 

{}""".format(ex, result) 

return JsonResponse({'error': error}) 

 

# Herunterladen eines Keys vom Keyserver möglich? 

c.set_keylist_mode(gpg.constants.keylist.mode.EXTERN) 

try: 

fetched_key = c.get_key(settings.GPG_HOST_USER) 

except Exception as ex: 

error = """The sender public key could not be fetched from the keyservers: 

{}: {}""".format(type(ex), ex) 

return JsonResponse({'error': error}) 

 

# Importieren des Keys vom Keyserver möglich? 

try: 

c.op_import_keys([fetched_key]) 

except Exception as ex: 

error = """The key fetched from the keyserver could not be imported: 

{}""".format(ex) 

return JsonResponse({'error': error}) 

 

return JsonResponse({'error': None}) 

 

 

def generate_letters_pa_selector(request): 

if request.method == 'POST': 

form = AddressLabelForm(request.POST) 

if form.is_valid(): 

pa_label = form.cleaned_data['pa_label'] 

return generate_letters(pa_label=pa_label) 

else: 

form = AddressLabelForm() 

return render(request, 'pa_select.html', {'form': form, 'title': 'Generate letters to members'}) 

 

 

def generate_letters(pa_label): 

""" 

Creates a zip file of undeliverable messages in the mail queue as pdf files. The pdfs are sorted by national or 

international mail and then concatenated by the number of pages to print. Messages to a member who's address is 

unknown are skipped. 

 

:return: A zip file containing messages from the mail queue as pdfs. 

""" 

data = {'national': [], 'international': []} 

 

for message in EmailToMember.objects.filter(Q(member__emailaddress__isnull=True) | Q(email_type=EmailToMember.SEND_TYPE_GA_INVITATION), 

member__address_unknown__lt=settings.ADDRESS_RETURNS).distinct(): 

del_num = DeliveryNumber(recipient=message.member, shipment='Letter on {}'.format(str(date.today()))) 

del_num.save() 

 

# Easy way to sneak it into the template 

message.member.this_delivery_number = del_num 

 

country = message.member.address_country 

template_paths = ['deadtree_templates/deadtree_base_{}.html'.format(country) 

for country in [country, 'EN']] 

 

html = render_to_string(template_paths, context={'mail': message, 'pa_label': pa_label}) 

document = HTML(string=html).render() 

 

if country == settings.COUNTRY: 

data['national'].append(document) 

else: 

data['international'].append(document) 

 

message._archive('sent as letter on {}'.format(date.today().strftime('%d.%m.%Y')), del_num.number) 

 

for letters in (l for l in data if len(l) > 0): 

d_l = data[letters] 

data[letters] = {} 

d_l.sort(key=lambda d: len(d.pages)) 

for pages, documents in groupby(d_l, key=lambda d: len(d.pages)): 

all_pages = (p for doc in documents for p in doc.pages) 

data[letters][pages] = d_l[0].copy(all_pages).write_pdf() 

 

zip_buffer = BytesIO() 

zip_file = zipfile.ZipFile(zip_buffer, 'a', zipfile.ZIP_DEFLATED, False) 

 

for destination in data: 

for pages in data[destination]: 

zip_file.writestr('{}/{}_pages.pdf'.format(destination, pages), data[destination][pages]) 

 

zip_file.close() 

zip_buffer.seek(0) 

response = HttpResponse(zip_buffer, content_type='application/zip') 

response['Content-Disposition'] = 'attachment; filename="letters.zip"' 

return response 

 

 

def msg_stats(_): 

stats = {} 

msgs = EmailToMember.objects.all() 

stats['msgInQ'] = msgs.count() 

 

stats['mail'] = msgs.filter(member__emailaddress__isnull=False).distinct().count() 

 

stats['letters'] = msgs.filter(member__emailaddress__isnull=True, 

member__address_unknown__lt=settings.ADDRESS_RETURNS).distinct().count() 

 

stats['unreachable'] = msgs.filter(member__emailaddress__isnull=True, 

member__address_unknown__gte=settings.ADDRESS_RETURNS).distinct().count() 

 

return HttpResponse(json.dumps(stats), content_type='application/json') 

 

 

def search_member_db(request): 

"""Handles member DB search requests returning HTML-table-rows""" 

context = {} 

if request.method == 'POST': 

params = request.POST 

check_empty_first_name = params.get('check_empty_first_name') 

check_empty_last_name = params.get('check_empty_last_name') 

check_empty_address = params.get('check_empty_address') 

check_empty_country = params.get('check_empty_country') 

check_empty_email = params.get('check_empty_email_address') 

if 'true' in (check_empty_address, check_empty_country, check_empty_first_name, check_empty_last_name, 

check_empty_email): 

# Search for empty fields 

q = Member.objects.all() 

if check_empty_first_name == 'true': 

q = q.filter(Q(first_name__exact='') | Q(first_name__isnull=True)) 

if check_empty_last_name == 'true': 

q = q.filter(Q(last_name__exact='') | Q(last_name__isnull=True)) 

if check_empty_address == 'true': 

# Filter for datasets with all three address field empty 

q = q.filter( 

( 

(Q(address_1__exact='') | 

Q(address_1__isnull=True)) & 

(Q(address_2__exact='') | 

Q(address_2__isnull=True)) & 

(Q(address_3__exact='') | 

Q(address_3__isnull=True)) 

) | Q(address_unknown__gte=settings.ADDRESS_RETURNS) 

) 

if check_empty_country == 'true': 

q = q.filter(Q(address_country__exact='') | Q(address_country__isnull=True)) 

if check_empty_email == 'true': 

q = q.exclude(emailaddress__isnull=False) 

 

context['results'] = q 

else: 

first_name = params.get('first_name', '') 

last_name = params.get('last_name', '') 

chaos_number = params.get('chaos_id', '') 

address = params.get('address', '') 

email = params.get('email_address', '') 

fee_reduced = str2bool(params.get('fee_is_reduced', 'false')) 

is_active = str2bool(params.get('is_active', 'false')) 

apply_filters = str2bool(params.get('apply_filters', 'false')) 

q = Member.objects.all() 

if first_name != '': 

q = q.filter(first_name__icontains=first_name) 

if last_name != '': 

q = q.filter(last_name__icontains=last_name) 

if chaos_number != '': # maybe check for illegal characters in the future 

q = q.filter(chaos_number=chaos_number) 

if address != '': 

q = q.filter(Q(address_1__icontains=address) | Q(address_2__icontains=address) 

| Q(address_3__icontains=address)) 

if email != '': 

q = q.filter(Q(emailaddress__email_address__icontains=email)) 

if apply_filters: 

q = q.filter(membership_reduced=fee_reduced, is_active=is_active) 

 

context['results'] = q 

return render(request, 'api/member_search_result.html', context) 

return HttpResponse('Neither Get nor Post') # HttpResponse('BAD FORMAT', content_type='text/html') 

 

 

def _erfa_statistics(): 

erfa_statistics = [ 

['Erfa', 'Mitglied', 'Förderm.', 'Ehrenm.', 'Vollzahler', 'Ermäßigt', 'Spezial', 'Vollzahler €', 'Ermäßigt €', 

'Spezial €', 'Summe €']] 

 

for erfa in Erfa.objects.all().order_by('long_name'): 

erfa_stat = [] 

 

m = Member.objects.filter(erfa=erfa) 

 

# Name of the Erfa 

erfa_stat.append(str(erfa)) 

 

# Count of different membership types 

for membership_type in [Member.MEMBERSHIP_TYPE_MEMBER, Member.MEMBERSHIP_TYPE_SUPPORTER, 

Member.MEMBERSHIP_TYPE_HONORARY]: 

erfa_stat.append(m.filter(membership_type=membership_type).count()) 

 

# Count of members by fee types 

sum_full = m.filter(fee_override__isnull=True, membership_reduced=False) 

sum_red = m.filter(fee_override__isnull=True, membership_reduced=True) 

sum_spec = m.filter(fee_override__isnull=False) 

 

erfa_stat.extend([x.count() for x in [sum_full, sum_red, sum_spec]]) 

 

# Expected fees by membership type 

erfa_stat.append(sum_full.count() * settings.FEE / 100.0) 

erfa_stat.append(sum_red.count() * settings.FEE_REDUCED / 100.0) 

erfa_stat.append(sum_spec.aggregate(spec_fee=Coalesce(Sum('fee_override'), 0))['spec_fee'] / 100.0) 

 

# Total expected fees per Erfa 

erfa_stat.append(sum(erfa_stat[-3:])) 

 

erfa_statistics.append(erfa_stat) 

 

return erfa_statistics 

 

 

def _payment_stats(): 

payment_stats = [['', 'Anzahl', 'ruhend', '>2 Monate im Rückstand', 'Ausstände >2 Monate (€)']] 

# Since the fee_paid_until field is set to when the next payment would be due, it is one year ahead of your last 

# due date. Thus we take two months off of this date (12 - 2) to get all members 2 months over their last due date. 

cut_off_date = date.today() + relativedelta(months=10) 

 

m = Member.objects.all() 

 

for membership_type, type_desc in [(Member.MEMBERSHIP_TYPE_MEMBER, 'Mitglieder'), 

(Member.MEMBERSHIP_TYPE_SUPPORTER, 'Fördermitglieder')]: 

o = m.filter(membership_type=membership_type) 

for q, desc in [(o.filter(fee_override__isnull=True, membership_reduced=False), 'Vollzahler'), 

(o.filter(fee_override__isnull=True, membership_reduced=True), 'Ermäßigt'), 

(o.filter(fee_override__isnull=False), 'Spezial')]: 

# Name and count 

line = ['{} ({})'.format(type_desc, desc), q.count()] 

 

# inactive 

line.append(q.exclude(is_active=True).count()) 

 

# Count overdue >2 months 

r = q.filter(is_active=True, account_balance__lt=0, fee_paid_until__lt=cut_off_date, 

erfa__has_doppelmitgliedschaft=False) 

line.append(r.count()) 

 

# fees overdue >2 months 

line.append(abs(r.aggregate(s=Coalesce(Sum('account_balance'), 0))['s'] / 100.0)) 

 

payment_stats.append(line) 

 

payment_stats.append( 

['Ehrenmitglieder', m.filter(membership_type=Member.MEMBERSHIP_TYPE_HONORARY).count(), 0, 0, 0]) 

 

data_grid = zip(*payment_stats[1:]) 

next(data_grid) 

payment_stats.append(['Summen'] + [sum(col) for col in data_grid]) 

 

return payment_stats 

 

 

def _datenschleuder_statistics(): 

datenschleuder_stats = [['Datenschleuder-Empfänger', 'Anzahl']] 

 

eligible_members = Member.objects.filter(Q(membership_end__isnull=True) | Q(membership_end__gt=date.today())) 

datenschleuder_stats.append(['Mitglieder', eligible_members.count()]) 

 

datenschleuder_stats.append(['- unbekannt verzogen', eligible_members.filter(address_unknown__gte=settings.ADDRESS_RETURNS).count()]) 

 

inactive_members_count = eligible_members.filter(address_unknown__lt=settings.ADDRESS_RETURNS, is_active=False).count() 

datenschleuder_stats.append(['- ruhend', inactive_members_count]) 

 

unpaid_fees_count = eligible_members.filter(address_unknown__lt=settings.ADDRESS_RETURNS, is_active=True).filter( 

Q(membership_reduced=True, account_balance__lt=-settings.FEE_REDUCED) 

| Q(membership_reduced=False, account_balance__lt=-settings.FEE)).count() 

datenschleuder_stats.append(['- Ausstände >1 Jahr', unpaid_fees_count]) 

 

sum_eligible_members = eligible_members.filter(address_unknown__lt=settings.ADDRESS_RETURNS, is_active=True).exclude( 

account_balance__lt=-settings.FEE_REDUCED, 

membership_reduced=True).exclude(account_balance__lt=-settings.FEE, membership_reduced=False).count() 

# \n\0 is a tricky way to get a spacer in. \n will cause a 2-row multi-row cell and \0 is a non-printable char, 

# which is not whitespace (whitespace is automatically removed), thus creating an empty row following this row 

datenschleuder_stats.append(['Teilsumme Mitglieder\n'+u"\u200B", sum_eligible_members]) 

 

eligible_subscribers = Subscriber.objects.all() 

datenschleuder_stats.append(['DS-Abonnenten', eligible_subscribers.count()]) 

 

address_unknown_subscribers_count = eligible_subscribers.filter(address_unknown__gte=settings.ADDRESS_RETURNS).count() 

datenschleuder_stats.append(['- unbekannt verzogen', address_unknown_subscribers_count]) 

 

run_out_subscribers_count = eligible_subscribers.exclude(address_unknown__gte=settings.ADDRESS_RETURNS).exclude( 

Q(max_datenschleuder_issue__gte=settings.NEXT_DATENSCHLEUDER_ISSUE) | Q(is_endless=True)).count() 

datenschleuder_stats.append( 

['- abgelaufen vor Ausgabe {}'.format(settings.NEXT_DATENSCHLEUDER_ISSUE), run_out_subscribers_count]) 

 

sum_eligible_subscribers = eligible_subscribers.exclude(address_unknown__gte=settings.ADDRESS_RETURNS).filter( 

Q(max_datenschleuder_issue__gte=settings.NEXT_DATENSCHLEUDER_ISSUE) | Q(is_endless=True)).count() 

datenschleuder_stats.append(['Teilsumme Abonnenten\n'+u"\u200B", sum_eligible_subscribers]) 

 

datenschleuder_stats.append(['Teilsumme Mitglieder', sum_eligible_members]) 

datenschleuder_stats.append(['Teilsumme Abonnenten', sum_eligible_subscribers]) 

datenschleuder_stats.append(['Postempfänger gesamt\n'+u"\u200B", sum_eligible_subscribers + sum_eligible_members]) 

 

datenschleuder_stats.append(['Postempfänger', sum_eligible_subscribers + sum_eligible_members]) 

sum_erfa_issues = (Erfa.objects.all().count() - 1) * 30 # "Alien" als Erfa abziehen 

datenschleuder_stats.append(['30 Stück je Erfa', sum_erfa_issues]) 

datenschleuder_stats.append( 

['Druckexemplare gesamt', sum_eligible_subscribers + sum_eligible_members + sum_erfa_issues]) 

 

return datenschleuder_stats 

 

 

@monthly() 

def _format_erfa_statistics(): 

context_dict = {'erfa_stats': tabulate(_erfa_statistics(), headers='firstrow'), 

'payment_stats': tabulate(_payment_stats(), headers='firstrow', floatfmt=['', '', '', '.2f']), 

'datenschleuder_stats': tabulate(_datenschleuder_statistics(), headers='firstrow'), 

} 

 

template = select_template(['mail_templates/mail_erfa_statistic.html', ]) 

parsed_template = template.render(context_dict) 

 

with gpg.Context(armor=True) as c: 

c.set_engine_info(gpg.constants.protocol.OpenPGP, home_dir=GPG_HOME) 

sender_key = c.get_key(GPG_HOST_USER, secret=True) 

c.signers = [sender_key] 

 

recipient_key = c.get_key(GPG_MANAGING_DIRECTOR) 

encrypted_body, _, _ = c.encrypt(parsed_template.encode(), recipients=[sender_key, recipient_key], 

always_trust=True, sign=True) 

 

send_email = EmailMessage( 

subject='Monatliche Statistik', 

body=encrypted_body.decode('utf-8'), 

from_email=EMAIL_HOST_USER, 

to=[EMAIL_MANAGING_DIRECTOR, ], 

bcc=[EMAIL_HOST_USER, ] 

) 

send_email.send(False) 

 

return parsed_template 

 

 

def get_erfa_statistics(_): 

return HttpResponse('<pre>' + _format_erfa_statistics() + '</pre>') 

 

 

@daily() 

def exit_members(): 

""" 

A daily check to remove all resigned members from the database. Resignation confirmation emails should have been 

sent already, because this routine touches every row in the database with a membership_end date in the past on every 

run. This may be inefficient, but simple. 

:return: 

""" 

for member in Member.objects.filter(Q(membership_end__isnull=False) & Q(membership_end__lte=date.today())): 

member.exit() 

 

 

@monthly() 

def send_delayed_payment_reminders(): 

for member in Member.objects.filter(is_active=True): 

if member.is_payment_late(): 

emails_in_queue = EmailToMember.objects.filter(email_type=EmailToMember.SEND_TYPE_DELAYED_PAYMENT, 

member=member) 

 

for email in emails_in_queue: 

email.render_subject_and_body() 

email.save() 

 

if not emails_in_queue: 

EmailToMember(email_type=EmailToMember.SEND_TYPE_DELAYED_PAYMENT, member=member).save() 

 

 

@daily() 

def remove_unread_email_addresses(): 

""" 

Removes the primary email address of all members who did not pay their membership fee and had no change in their 

data set since EMAIL_REMOVE_TIME months as defined in the settings. The assumption is that these members do not 

react to their primary email address and the next one should be tried. 

:return: None 

""" 

for member in Member.objects.filter(is_active=True): 

if member.account_balance < 0 and member.last_update < date.today() - relativedelta( 

months=settings.EMAIL_REMOVE_TIME): 

primary_email = member.get_emails().first() 

if primary_email: 

primary_email.delete() 

member.save() # save the member to set the last-update date to today 

 

 

def drop_transactions(request): 

# http://localhost:8000/api/drop_transactions?reallydroptransactions=yes 

_request = i_request(request) 

response = {'errorMessage': '', 'wasCleared': False, 'transactionsDropped': 0} 

if 'reallydroptransactions' in _request and _request['reallydroptransactions'] == 'yes': 

try: 

from import_app.models import Transaction 

all_transactions = Transaction.objects.all() 

count_transactions = all_transactions.count() 

all_transactions.delete() 

response['transactionsDropped'] = count_transactions 

response['wasCleared'] = True 

except Exception as ex: 

response['errorMessage'] = str(ex) 

 

return JsonResponse(response) 

 

 

def bulk_remove_members(request): 

""" 

Mass removal of unreachable members. 

:param request: Should contain the POST parameter 'chaos_numbers' as a string representing Chaos Numbers separated 

by newlines 

:return: A JSON object with a 'success' and an 'error' list of Chaos Numbers 

""" 

changes = {'success': [], 'error': []} 

 

cut_off_date = date.today() - relativedelta(months=24) 

 

if request.method == 'POST': 

lines = request.POST['chaos_numbers'].split('\n') 

for chaos_number in (line.strip() for line in lines): 

try: 

m = Member.objects.get(chaos_number__exact=chaos_number) 

if m.account_balance < 0 and not m.emailaddress_set.exists() and m.address_unknown >= settings.ADDRESS_RETURNS and m.is_payment_late( 

cut_off_date=cut_off_date) and m.fee_last_paid < cut_off_date: 

m.account_balance = 0 

m.save() 

m.emailtomember_set.all().delete() 

m.exit() 

changes['success'].append(chaos_number) 

continue 

else: 

raise ValueError('Member is still reachable or paying membership fees') 

except Exception as e: 

changes['error'].append('{}: {}'.format(chaos_number, e)) 

return JsonResponse(changes) 

 

 

def bulk_address_unknown(request): 

""" 

Takes a list of Chaos Numbers or Datenschleuder delivery numbers, one per line, and increments these members' 

address_unknown counter. 

:param request: Should contain the POST parameter 'chaos_numbers' as a string representing Chaos Numbers or 

Datenschleuder delivery numbers separated 

by newlines 

:return: A JSON object with a 'success' and an 'error' list of Chaos Numbers and Datenschleuder delivery numbers, 

including error messages for the latter. 

""" 

changes = {'success': [], 'error': []} 

if request.method == 'POST': 

lines = request.POST['chaos_numbers'].split('\n') 

for input_number in (line.strip() for line in lines): 

try: 

702 ↛ 703line 702 didn't jump to line 703, because the condition on line 702 was never true if input_number[0].upper() == 'D': 

del_num = DeliveryNumber.objects.get(number__exact=input_number.upper()) 

if del_num.returned: 

raise ValueError('Delivery number has been processed previously') 

chaos_number = del_num.recipient.chaos_number 

del_num.returned = True 

del_num.save() 

else: 

chaos_number = input_number 

 

p = Person.objects.get(chaos_number__exact=chaos_number) 

p.address_unknown += 1 

p.save() 

changes['success'].append(chaos_number) 

except Exception as e: 

changes['error'].append("{}: {}".format(input_number, e)) 

return JsonResponse(changes) 

 

 

def mass_reactivation_reminder(_): 

""" 

Sends an e-mail to all inactive members asking them to either end their membership or activating again. This 

method is meant to be removed when no inactive members are left. 

:return: JSON list of Chaos Numbers and comments of inactive members who were mailed 

""" 

response = {'reminded members': []} 

for member in Member.objects.filter(is_active=False, membership_end=None, erfa__has_doppelmitgliedschaft=False): 

EmailToMember(email_type=EmailToMember.SEND_TYPE_REACTIVATION_REMINDER, member=member).save() 

response['reminded members'].append("{}: {}".format(member.chaos_number, member.comment)) 

 

return JsonResponse(response) 

 

 

def inactive_members(request): 

""" 

Find all inactive members. 

:return: Text file with a table holding the full dataset of the members without contact information. 

""" 

inactive_members = Member.objects.filter(is_active=False, emailaddress=None).annotate( 

erfa_name=F("erfa_id__short_name")).annotate(konto=Cast(F("account_balance"), FloatField()) / 100).annotate( 

address=Concat(F("address_1"), Value(', '), F("address_2"), Value(', '), F("address_3")) 

) 

 

inactive_members = inactive_members.values_list("chaos_number", "erfa_name", "first_name", "last_name", 

"address", "address_country", "address_unknown", "is_active", 

"membership_reduced", "membership_start", "fee_last_paid", "konto", 

"comment") 

 

headers = ["Cnr", "Erfa", "Vorname", "Nachname", "Adresse", "Land", "Zust.vers.", "aktiv", "ermäßigt", 

"eingetreten am", "zuletzt gezahlt am", "Guthaben", "Kommentar"] 

table = tabulate(inactive_members, headers=headers, floatfmt=".2f") 

 

response = HttpResponse(table, content_type='text/plain') 

response['Content-Disposition'] = 'attachment; filename="unreachable members with overdue fees.txt"' 

return response 

 

 

def no_contact(request): 

""" 

Find all members who neither have a known address nor any e-mail address and are overdue with their fees. 

:return: Text file with a table holding the full dataset of the members without contact information. 

""" 

members_no_contact = Member.objects.filter(address_unknown__gte=settings.ADDRESS_RETURNS, emailaddress=None, 

erfa__has_doppelmitgliedschaft=False).annotate( 

erfa_name=F("erfa_id__short_name")).annotate(konto=Cast(F("account_balance"), FloatField()) / 100).annotate( 

address=Concat(F("address_1"), Value(', '), F("address_2"), Value(', '), F("address_3")) 

) 

 

# Filter for all members who are overdue by the supplied number of months and also did not do any payments during 

# that period as well. 12 is default. 

# The trick is to get all those members' chaosnumbers from the database and then filter by these 

months = int(request.GET.get('months_overdue', default=12)) 

cut_off_date = date.today() - relativedelta(months=months) 

overdue_member_cnr = [member.chaos_number for member in members_no_contact if 

member.is_payment_late(cut_off_date=cut_off_date) and member.fee_last_paid < cut_off_date] 

members_no_contact = members_no_contact.filter(chaos_number__in=overdue_member_cnr).order_by('chaos_number') 

 

members_no_contact = members_no_contact.values_list("chaos_number", "erfa_name", "first_name", "last_name", 

"address", "address_country", "is_active", "membership_reduced", 

"membership_start", "fee_last_paid", "konto", "comment") 

 

headers = ["Cnr", "Erfa", "Vorname", "Nachname", "Adresse", "Land", "aktiv", "ermäßigt", 

"eingetreten am", "zuletzt gezahlt am", "Guthaben", "Kommentar"] 

table = tabulate(members_no_contact, headers=headers, floatfmt=".2f") 

 

response = HttpResponse(table, content_type='text/plain') 

response['Content-Disposition'] = 'attachment; filename="unreachable members with overdue fees.txt"' 

return response 

 

 

def ga_invitations(pa_label): 

 

def render_template(context): 

""" 

Selects a template and renders it's subject and body sections. 

 

:param country_code: Two letter country code. Is appended to the template file name with an underline. EN is 

fallback if none is found. 

:param context: Depends on the objects used in the template. 

:return: subject and body of the email as a tuple of strings. 

""" 

template_paths = ['mail_templates/mail_ga_invitation_html_DE.html'] 

 

nodes = dict((n.name, n) for n in select_template(template_paths).template.nodelist 

if n.__class__.__name__ == 'BlockNode') 

 

try: 

return nodes['subject'].render(context), nodes['body'].render(context) 

except KeyError as ke: 

raise TemplateError('Template is missing a {{% block {} %}}'.format(str(ke)[1:-1])) 

 

def generate_pdf(member): 

class Message: 

def __init__(self): 

self.member = None 

self.subject = None 

self.body = None 

 

print('Generating invitation for member {}.'.format(member.chaos_number)) 

 

del_num = DeliveryNumber(recipient=member, shipment='MV 2021') 

del_num.save() 

# Simple method to bring this number to the template 

member.this_delivery_number = del_num.number 

 

abst_token = AbstimmungToken(member=member, abstimmung='MV 2021') 

abst_token.save() 

# Simple method to bring this token to the template 

member.this_abstimmung_token = abst_token.token 

 

template_paths = ['deadtree_templates/ga_invite_DE.html'] 

 

message = Message() 

message.member = member 

message.subject, message.body = render_template( 

Context({'member': member, 'verein_user': settings.VEREIN_USER, 'verein_pass': settings.VEREIN_PASS})) 

 

html = render_to_string(template_paths, context={'mail': message, 'pa_label': pa_label}) 

document = HTML(string=html).render() 

pages = len(document.pages) 

pdf = document.write_pdf() 

 

return pdf, pages, member.address_country == settings.COUNTRY 

 

pool = Pool() 

pdfs = pool.map(generate_pdf, Member.objects.members_only().exclude(membership_type=Member.MEMBERSHIP_TYPE_SUPPORTER)) 

 

data = {'national': [], 'international': []} 

 

for pdf, pages, is_national in pdfs: 

if is_national: 

data['national'].append((pdf, pages)) 

else: 

data['international'].append((pdf, pages)) 

 

for letters in (l for l in data if len(l) > 0): 

d_l = data[letters] 

data[letters] = {} 

d_l.sort(key=lambda d: d[1]) 

for pages, documents in groupby(d_l, key=lambda d: d[1]): 

pages_pdf_buffer = BytesIO() 

merger = PdfFileMerger() 

 

for doc in documents: 

pdf_buffer = BytesIO() 

pdf_buffer.write(doc[0]) 

pdf_buffer.seek(0) 

 

merger.append(pdf_buffer) 

 

merger.write(pages_pdf_buffer) 

pages_pdf_buffer.seek(0) 

data[letters][pages] = pages_pdf_buffer.read() 

 

zip_buffer = BytesIO() 

zip_file = zipfile.ZipFile(zip_buffer, 'a', zipfile.ZIP_DEFLATED, False) 

 

for destination in data: 

for pages in data[destination]: 

zip_file.writestr('{}/{}_pages.pdf'.format(destination, pages), data[destination][pages]) 

 

zip_file.close() 

zip_buffer.seek(0) 

response = HttpResponse(zip_buffer, content_type='application/zip') 

response['Content-Disposition'] = 'attachment; filename="ga_invitations.zip"' 

return response 

 

 

def generate_pdf_from_html(html_template: str, context: dict): 

filled_in_template = render_to_string(html_template, context=context) 

rendered_html = HTML(string=filled_in_template).render() 

return rendered_html.write_pdf() 

 

 

def chunks(lst, length): 

length = max(1, length) 

return [lst[i:i + length] for i in range(0, len(lst), length)] 

 

 

def datenschleuder_address_csv_export(_): 

""" 

This method generates the address information as CSV file for all recipients of a Datenschleuder. This is determined 

by the config setting NEXT_DATENSCHLEUDER_ISSUE and the return value of will_receive_issue() on every Person in the 

database. 

 

:return: A CSV file containing the Datenschleuder address information for all recipients 

""" 

 

recipients = (person for person in Person.objects.all() if 

person.will_receive_issue(settings.NEXT_DATENSCHLEUDER_ISSUE)) 

 

csv_file = StringIO() 

writer = csv.writer(csv_file, quoting=csv.QUOTE_MINIMAL, delimiter=',') 

 

for r in recipients: 

# DeliveryNumbers are stored for checking returned mail later on 

del_num = DeliveryNumber(recipient=r, shipment='DS{}'.format(settings.NEXT_DATENSCHLEUDER_ISSUE)) 

del_num.save() 

 

writer.writerow([del_num.number, r.get_name(), r.address_1, r.address_2, r.address_3, 

r.get_address_country_display().upper()]) 

 

csv_file.seek(0) 

response = HttpResponse(csv_file, content_type='text/csv') 

csv_file.close() 

 

response['Content-Disposition'] = 'attachment; filename="ds_versand.csv"' 

return response 

 

 

def datenschleuder_address_stickers(_, pa_label, num_pages, pickup_date): 

""" 

This method generates the address labels for all recipients of a Datenschleuder. This is determined by the config 

setting NEXT_DATENSCHLEUDER_ISSUE and the return value of will_receive_issue() on every Person in the database. 

The resulting PDF will be ready for printing on DIN-A4 label sheets with 3x7 labels. The addresses are sorted by 

German recipients and rest of the world. Within the German recipients they are sorted by the first two numbers of 

the postal code as returned by get_plz() from 00 to 99. 

 

:return: A PDF file containing the Datenschleuder address labels 

""" 

recipients = (person for person in Person.objects.all() if 

person.will_receive_issue(settings.NEXT_DATENSCHLEUDER_ISSUE)) 

 

germany, world = [], [] 

for r in recipients: 

# DeliveryNumbers are stored for checking returned mail later on 

del_num = DeliveryNumber(recipient=r, shipment='DS{}'.format(settings.NEXT_DATENSCHLEUDER_ISSUE)) 

del_num.save() 

# Simple method to bring this number to the template 

r.this_delivery_number = del_num.number 

 

germany.append(r) if r.address_country == 'DE' else world.append(r) 

 

germany = sorted(germany, key=lambda x: x.get_plz()) 

 

plz_regions = [] 

for plz_region, recipients_in_plz_region in groupby(germany, key=lambda x: x.get_plz()[:2]): 

plz_regions.append(list(recipients_in_plz_region)) 

 

# Calculating some information about the printed magazine for delivery 

# Weights taken from http://papiergewichtrechner.de/ 

# Thickness calculation taken from https://print-assistant.de/tools/press/papierstaerke-berechnen/ 

# Post container size taken from https://shop.deutschepost.de/postbehaelter-typ-2-grau 

 

grams_inner_page = 3.7296 # DIN-A4 at 120g/m² 

grams_outer_page = 9.3240 # DIN-A4 at 300g/m² 

grams_envelope = 8.9035 # DIN-C5 envelope, i. e. two pages at 120g/m² 

grams_issue = ceil((num_pages / 2 - 2) * grams_inner_page + 2 * grams_outer_page + grams_envelope) 

 

# Volume factors provided by Pinguin Druck 

mm_thickness_120 = 0.14 # 1.2 times volume 

mm_thickness_300 = 0.312 # 1.04 times volume 

 

# Page 25 on the bottom says maximum weight of 10kg per box: 

# https://www.direktmarketingcenter.de/fileadmin/Download-Center/DIALOGPOST_National_-_Produktbroschuere_-_Stand_April_2017.pdf 

# 

# Information about Postbehälter Typ 2: https://shop.deutschepost.de/postbehaelter-typ-2-grau 

mm_box_length = 470 

grams_box_weight = 1600 

grams_box_max_weight = 10000 

grams_payload_weight = grams_box_max_weight - grams_box_weight 

 

boxes_per_cart = 20 # And 32 if empty. Asked the Deutsche Post at 0800 999 8888 about it. 

 

# All inner pages + envelope + outer pages 

mm_thickness_issue = num_pages / 2 * mm_thickness_120 + 2 * mm_thickness_300 

 

max_issues_per_box = min(floor(mm_box_length / mm_thickness_issue), floor(grams_payload_weight / grams_issue)) 

 

boxes_nat = [] 

for plz_region in plz_regions: 

plz = plz_region[0].get_plz()[:2] 

for chunk in chunks(plz_region, max_issues_per_box): 

box = { 

'recipients': chunk, 

'plz': plz, 

} 

boxes_nat.append(box) 

 

boxes_national = len(boxes_nat) 

 

boxes_nat_enriched = [] 

for num, box in enumerate(boxes_nat): 

 

box['box_num'] = num + 1 

box['num_issues'] = len(box['recipients']) 

box['action_name'] = 'Datenschleuder {} national'.format(settings.NEXT_DATENSCHLEUDER_ISSUE) 

box['date'] = pickup_date.strftime('%d.%m.%Y') 

box['total_boxes'] = boxes_national 

box['cart_num'] = floor(box['box_num'] / boxes_per_cart) + 1 

 

boxes_nat_enriched.append(box) 

 

boxes_int = [] 

for chunk in chunks(world, max_issues_per_box): 

box = { 

'recipients': chunk, 

} 

boxes_int.append(box) 

 

boxes_international = len(boxes_int) 

 

boxes_int_enriched = [] 

for num, box in enumerate(boxes_int): 

box['box_num'] = num + 1 

box['num_issues'] = len(box['recipients']) 

box['action_name'] = 'Datenschleuder {} international'.format(settings.NEXT_DATENSCHLEUDER_ISSUE) 

box['date'] = pickup_date.strftime('%d.%m.%Y') 

box['total_boxes'] = boxes_international 

box['cart_num'] = floor(box['box_num'] / boxes_per_cart) + 1 

 

boxes_int_enriched.append(box) 

 

delivery_paper_info = { 

'issue': settings.NEXT_DATENSCHLEUDER_ISSUE, 

'weight_grams': grams_issue, 

'thickness_mm': round(mm_thickness_issue, 1), 

'carts': ceil(boxes_national / boxes_per_cart) + ceil(boxes_international / boxes_per_cart), 

'action_nat': 'Datenschleuder {} national'.format(settings.NEXT_DATENSCHLEUDER_ISSUE), 

'recipients_national': len(germany), 

'boxes_total_nat': boxes_national, 

'action_int': 'Datenschleuder {} international'.format(settings.NEXT_DATENSCHLEUDER_ISSUE), 

'recipients_international': len(world), 

'boxes_total_int': boxes_international, 

} 

 

# Append the world recipients here so they are not part of the box label generation for national recipients, 

# but are part of the print label generation 

plz_regions.append(world) 

 

fv_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 

"../../static/images/DP_VerkVermerk_DiP_NAT.jpg") 

 

address_labels_pdf = generate_pdf_from_html(html_template='deadtree_templates/ds_addresses_DE.html', 

context={'plz_regions': plz_regions, 'pa_label': pa_label, 

'fv_path': fv_path}) 

 

delivery_info_pdf = generate_pdf_from_html(html_template='deadtree_templates/ds_delivery_info.html', 

context={'delivery_info': delivery_paper_info}) 

 

box_labels_nat_pdf = generate_pdf_from_html(html_template='deadtree_templates/ds_box_labels.html', 

context={'box_labels': boxes_nat_enriched}) 

 

box_labels_int_pdf = generate_pdf_from_html(html_template='deadtree_templates/ds_box_labels.html', 

context={'box_labels': boxes_int_enriched}) 

 

zip_buffer = BytesIO() 

zip_file = zipfile.ZipFile(zip_buffer, 'a', zipfile.ZIP_DEFLATED, False) 

 

zip_file.writestr('Lieferscheininformationen.pdf', delivery_info_pdf) 

zip_file.writestr('Behälterbeschriftungen national.pdf', box_labels_nat_pdf) 

zip_file.writestr('Behälterbeschriftungen international.pdf', box_labels_int_pdf) 

zip_file.writestr('Adressaufkleber.pdf', address_labels_pdf) 

 

zip_file.close() 

zip_buffer.seek(0) 

response = HttpResponse(zip_buffer, content_type='application/zip') 

response['Content-Disposition'] = 'attachment; filename="ds_versand.zip"' 

return response 

 

 

def ga_emails(_): 

""" 

Send the general assembly invitation as email, or letter if no working email exists. 

:return: JSON list of Chaos Numbers and comments of members who an email was sent to 

""" 

 

chaos_numbers = [] 

 

for member in Member.objects.members_only(): 

if EmailToMember.objects.filter(email_type=EmailToMember.SEND_TYPE_GA_INVITATION, member=member).exists(): 

continue 

EmailToMember(email_type=EmailToMember.SEND_TYPE_GA_INVITATION, member=member).save() 

print('Sending GA invitation for member {}'.format(member.chaos_number)) 

chaos_numbers.append(member.chaos_number) 

 

return JsonResponse({'Mails sent to': chaos_numbers})