plomlompom.com Git - misc/blob - ledger.py

   1 from http.server import BaseHTTPRequestHandler, HTTPServer
   2 import os
   3 import html
   4 import jinja2
   5 import decimal
   6 from datetime import datetime, timedelta
   7 from urllib.parse import parse_qs, urlparse
   8 from plomlib import PlomDB, PlomException, run_server, run_server, PlomServer
   9
  10 server_port = 8082
  11
  12
  13 def apply_booking_to_account_balances(account_sums, account, currency, amount):
  14     if not account in account_sums:
  15         account_sums[account] = {currency: amount}
  16     elif not currency in account_sums[account].keys():
  17         account_sums[account][currency] = amount
  18     else:
  19         account_sums[account][currency] += amount
  20
  21
  22 def bookings_to_account_tree(bookings):
  23     account_sums = {}
  24     for booking in bookings:
  25         for account, changes in booking.account_changes.items():
  26             for currency, amount in changes.items():
  27                 apply_booking_to_account_balances(account_sums, account, currency, amount)
  28     account_tree = {}
  29     def collect_branches(account_name, path):
  30         node = account_tree
  31         path_copy = path[:]
  32         while len(path_copy) > 0:
  33             step = path_copy.pop(0)
  34             node = node[step]
  35         toks = account_name.split(":", maxsplit=1)
  36         parent = toks[0]
  37         if parent in node.keys():
  38             child = node[parent]
  39         else:
  40             child = {}
  41             node[parent] = child
  42         if len(toks) == 2:
  43             k, v = collect_branches(toks[1], path + [parent])
  44             if k not in child.keys():
  45                 child[k] = v
  46             else:
  47                 child[k].update(v)
  48         return parent, child
  49     for account_name in sorted(account_sums.keys()):
  50         k, v = collect_branches(account_name, [])
  51         if k not in account_tree.keys():
  52             account_tree[k] = v
  53         else:
  54             account_tree[k].update(v)
  55     def collect_totals(parent_path, tree_node):
  56         for k, v in tree_node.items():
  57             child_path = parent_path + ":" + k
  58             for currency, amount in collect_totals(child_path, v).items():
  59                 apply_booking_to_account_balances(account_sums, parent_path, currency, amount)
  60         return account_sums[parent_path]
  61     for account_name in account_tree.keys():
  62         account_sums[account_name] = collect_totals(account_name, account_tree[account_name])
  63     return account_tree, account_sums
  64
  65
  66 def parse_lines(lines, validate_bookings=True):
  67     inside_booking = False
  68     date_string, description = None, None
  69     booking_lines = []
  70     start_line = 0
  71     bookings = []
  72     comments = []
  73     lines = lines.copy() + [''] # to ensure a booking-ending last line
  74     last_date = ''
  75     for i, line in enumerate(lines):
  76         prefix = f"line {i}"
  77         # we start with the case of an utterly empty line
  78         comments += [""]
  79         stripped_line = line.rstrip()
  80         if stripped_line == '':
  81             if inside_booking:
  82                 # assume we finished a booking, finalize, and commit to DB
  83                 if len(booking_lines) < 2:
  84                     raise PlomException(f"{prefix} booking ends to early")
  85                 booking = Booking(date_string, description, booking_lines, start_line, validate_bookings)
  86                 bookings += [booking]
  87             # expect new booking to follow so re-zeroall booking data
  88             inside_booking = False
  89             date_string, description = None, None
  90             booking_lines = []
  91             continue
  92         # if non-empty line, first get comment if any, and commit to DB
  93         split_by_comment = stripped_line.split(sep=";", maxsplit=1)
  94         if len(split_by_comment) == 2:
  95             comments[i] = split_by_comment[1].lstrip()
  96         # if pre-comment empty: if inside_booking, this must be a comment-only line so we keep it for later ledger-output to capture those comments; otherwise, no more to process for this line
  97         non_comment = split_by_comment[0].rstrip()
  98         if non_comment.rstrip() == '':
  99              if inside_booking:
 100                  booking_lines += ['']
 101              continue
 102         # if we're starting a booking, parse by first-line pattern
 103         if not inside_booking:
 104             start_line = i
 105             toks = non_comment.split(maxsplit=1)
 106             date_string = toks[0]
 107             try:
 108                 datetime.strptime(date_string, '%Y-%m-%d')
 109             except ValueError:
 110                 raise PlomException(f"{prefix} bad date string: {date_string}")
 111             if last_date > date_string:
 112                 raise PlomException(f"{prefix} out-of-order-date")
 113             last_date = date_string
 114             try:
 115                 description = toks[1]
 116             except IndexError:
 117                 raise PlomException(f"{prefix} bad description: {description}")
 118             inside_booking = True
 119             booking_lines += [non_comment]
 120             continue
 121         # otherwise, read as transfer data
 122         toks = non_comment.split()  # ignore specification's allowance of single spaces in names
 123         if len(toks) > 3:
 124             raise PlomException(f"{prefix} too many booking line tokens: {toks}")
 125         amount, currency = None, None
 126         account_name = toks[0]
 127         if account_name[0] == '[' and account_name[-1] == ']':
 128             # ignore specification's differentiation of "virtual" accounts
 129             account_name = account_name[1:-1]
 130         decimal_chars = ".-0123456789"
 131         if len(toks) == 3:
 132             i_currency = 1
 133             try:
 134                 amount = decimal.Decimal(toks[1])
 135                 i_currency = 2
 136             except decimal.InvalidOperation:
 137                 try:
 138                     amount = decimal.Decimal(toks[2])
 139                 except decimal.InvalidOperation:
 140                     raise PlomException(f"{prefix} no decimal number in: {toks[1:]}")
 141             currency = toks[i_currency]
 142             if currency[0] in decimal_chars:
 143                 raise PlomException(f"{prefix} currency starts with int, dot, or minus: {currency}")
 144         elif len(toks) == 2:
 145             value = toks[1]
 146             inside_amount = False
 147             inside_currency = False
 148             amount_string = ""
 149             currency = ""
 150             dots_counted = 0
 151             for i, c in enumerate(value):
 152                 if i == 0:
 153                     if c in decimal_chars:
 154                         inside_amount = True
 155                     else:
 156                         inside_currency = True
 157                 if inside_currency:
 158                     if c in decimal_chars and len(amount_string) == 0:
 159                         inside_currency = False
 160                         inside_amount = True
 161                     else:
 162                         currency += c
 163                         continue
 164                 if inside_amount:
 165                     if c not in decimal_chars:
 166                         if len(currency) > 0:
 167                             raise PlomException(f"{prefix} amount has non-decimal chars: {value}")
 168                         inside_currency = True
 169                         inside_amount = False
 170                         currency += c
 171                         continue
 172                     if c == '-' and len(amount_string) > 1:
 173                         raise PlomException(f"{prefix} amount has non-start '-': {value}")
 174                     if c == '.':
 175                         if dots_counted > 1:
 176                             raise PlomException(f"{prefix} amount has multiple dots: {value}")
 177                         dots_counted += 1
 178                     amount_string += c
 179             if len(currency) == 0:
 180                 raise PlomException(f"{prefix} currency missing: {value}")
 181             if len(amount_string) > 0:
 182                 amount = decimal.Decimal(amount_string)
 183         booking_lines += [(account_name, amount, currency)]
 184     if inside_booking:
 185         raise PlomException(f"{prefix} last booking unfinished")
 186     return bookings, comments
 187
 188
 189 class Booking:
 190
 191     def __init__(self, date_string, description, booking_lines, start_line, process=True):
 192         self.date_string = date_string
 193         self.description = description
 194         self.lines = booking_lines
 195         self.start_line = start_line
 196         if process:
 197             self.validate_booking_lines()
 198             self.sink = {}
 199             self.account_changes = self.parse_booking_lines_to_account_changes()
 200
 201     def validate_booking_lines(self):
 202         prefix = f"booking at line {self.start_line}"
 203         sums = {}
 204         empty_values = 0
 205         for line in self.lines[1:]:
 206             if line == '':
 207                 continue
 208             _, amount, currency = line
 209             if amount is None:
 210                 if empty_values > 0:
 211                     raise PlomException(f"{prefix} relates more than one empty value of same currency {currency}")
 212                 empty_values += 1
 213                 continue
 214             if currency not in sums:
 215                 sums[currency] = 0
 216             sums[currency] += amount
 217         if empty_values == 0:
 218             for k, v in sums.items():
 219                 if v != 0:
 220                     raise PlomException(f"{prefix} does not add up to zero / {k} {v}")
 221         else:
 222             sinkable = False
 223             for k, v in sums.items():
 224                 if v != 0:
 225                     sinkable = True
 226             if not sinkable:
 227                 raise PlomException(f"{prefix} has empty value that cannot be filled")
 228
 229     def parse_booking_lines_to_account_changes(self):
 230         account_changes = {}
 231         debt = {}
 232         sink_account = None
 233         for line in self.lines[1:]:
 234             if line == '':
 235                 continue
 236             account, amount, currency = line
 237             if amount is None:
 238                 sink_account = account
 239                 continue
 240             apply_booking_to_account_balances(account_changes, account, currency, amount)
 241             if currency not in debt:
 242                 debt[currency] = amount
 243             else:
 244                 debt[currency] += amount
 245         if sink_account:
 246             for currency, amount in debt.items():
 247                 apply_booking_to_account_balances(account_changes, sink_account, currency, -amount)
 248                 self.sink[currency] = -amount
 249         return account_changes
 250
 251
 252
 253 class LedgerDB(PlomDB):
 254
 255     def __init__(self):
 256         self.bookings = []
 257         self.comments = []
 258         self.real_lines = []
 259         super().__init__('_ledger')
 260         ret = parse_lines(self.real_lines)
 261         self.bookings += ret[0]
 262         self.comments += ret[1]
 263
 264     def read_db_file(self, f):
 265         self.real_lines += [l.rstrip() for l in f.readlines()]
 266
 267     def get_lines(self, start, end):
 268         return self.real_lines[start:end]
 269
 270     def write_db(self, text, mode='w'):
 271         self.write_text_to_db(text)
 272
 273     def insert_at_date(self, lines, date):
 274         start_at = len(self.real_lines)
 275         for b in self.bookings:
 276             if b.date_string == date:
 277                 start_at = b.start_line
 278                 break
 279             elif b.date_string > date:
 280                 break
 281         if start_at == len(self.real_lines):
 282             lines = [''] + lines
 283         return self.write_lines_in_total_lines_at(self.real_lines, start_at, lines)
 284
 285     def update(self, start, end, lines, date):
 286         total_lines = self.real_lines[:start] + self.real_lines[end:]
 287         n_original_lines = end - start
 288         start_at = len(total_lines)
 289         for b in self.bookings:
 290             if b.date_string == date:
 291                 if start_at == len(total_lines) or b.start_line == start:
 292                     start_at = b.start_line
 293                     if b.start_line > start:
 294                         start_at -= n_original_lines
 295             elif b.date_string > date:
 296                 break
 297         if start_at == len(total_lines):
 298             lines = [''] + lines
 299         return self.write_lines_in_total_lines_at(total_lines, start_at, lines)
 300
 301     def write_lines_in_total_lines_at(self, total_lines, start_at, lines):
 302         total_lines = total_lines[:start_at] + lines + [''] + total_lines[start_at:]
 303         _, _ = parse_lines(lines)
 304         text = '\n'.join(total_lines)
 305         self.write_db(text)
 306         return start_at
 307
 308     def get_nth_for_booking_of_start_line(self, start_line):
 309         nth = 0
 310         for b in self.bookings:
 311             if b.start_line >= start_line:
 312                 break
 313             nth += 1
 314         return nth
 315
 316     def add_taxes(self, lines, finish=False):
 317         ret = []
 318         bookings, _ = parse_lines(lines)
 319         date = bookings[0].date_string
 320         acc_kk_add = 'Reserves:KrankenkassenBeitragsWachstum'
 321         acc_kk_minimum = 'Reserves:Month:KrankenkassenDefaultBeitrag'
 322         acc_kk = 'Expenses:KrankenKasse'
 323         acc_est = 'Reserves:Einkommenssteuer'
 324         acc_assets = 'Assets'
 325         acc_buffer = 'Reserves:NeuAnfangsPuffer:Ausgaben'
 326         last_monthbreak_assets = 0
 327         last_monthbreak_est = 0
 328         last_monthbreak_kk_minimum = 0
 329         last_monthbreak_kk_add = 0
 330         buffer_expenses = 0
 331         kk_expenses = 0
 332         est_expenses = 0
 333         months_passed = -int(finish)
 334         for b in self.bookings:
 335             if date == b.date_string:
 336                 break
 337             acc_keys = b.account_changes.keys()
 338             if acc_buffer in acc_keys:
 339                 buffer_expenses -= b.account_changes[acc_buffer]['€']
 340             if acc_kk_add in acc_keys:
 341                 kk_expenses += b.account_changes[acc_kk_add]['€']
 342             if acc_kk in acc_keys:
 343                 kk_expenses += b.account_changes[acc_kk]['€']
 344             if acc_est in acc_keys:
 345                 est_expenses += b.account_changes[acc_est]['€']
 346             if acc_kk_add in acc_keys and acc_kk_minimum in acc_keys:
 347                 months_passed += 1
 348                 if finish:
 349                     last_monthbreak_kk_add = b.account_changes[acc_kk_add]['€']
 350                     last_monthbreak_est = b.account_changes[acc_est]['€']
 351                     last_monthbreak_kk_minimum = b.account_changes[acc_kk_minimum]['€']
 352                     last_monthbreak_assets = b.account_changes[acc_buffer]['€']
 353         old_needed_income_before_anything = - last_monthbreak_assets - last_monthbreak_kk_add - last_monthbreak_kk_minimum - last_monthbreak_est
 354         if finish:
 355             ret += [f'  {acc_est}  {-last_monthbreak_est}€ ; for old assumption of needed income: {old_needed_income_before_anything}€']
 356         _, account_sums = bookings_to_account_tree(bookings)
 357         expenses_so_far = -1 * account_sums[acc_assets]['€'] + old_needed_income_before_anything
 358         needed_income_before_kk = expenses_so_far
 359         ESt_this_month = 0
 360         left_over = needed_income_before_kk - ESt_this_month
 361         too_low = 0
 362         too_high = 2 * needed_income_before_kk
 363         E0 = decimal.Decimal(10908)
 364         E1 = decimal.Decimal(15999)
 365         E2 = decimal.Decimal(62809)
 366         E3 = decimal.Decimal(277825)
 367         while True:
 368             zvE = buffer_expenses - kk_expenses + (12 - months_passed) * needed_income_before_kk
 369             if finish:
 370                 zvE += last_monthbreak_assets + last_monthbreak_kk_add + last_monthbreak_kk_minimum
 371             if zvE < E0:
 372                 ESt = decimal.Decimal(0)
 373             elif zvE < E1:
 374                 y = (zvE - E0)/10000
 375                 ESt = (decimal.Decimal(979.18) * y + 1400) * y
 376             elif zvE < E2:
 377                 y = (zvE - E1)/10000
 378                 ESt = (decimal.Decimal(192.59) * y + 2397) * y + decimal.Decimal(966.53)
 379             elif zvE < E3:
 380                 ESt = decimal.Decimal(0.42) * (zvE - decimal.Decimal(62809))  + decimal.Decimal(16405.54)
 381             else:
 382                 ESt = decimal.Decimal(0.45) * (zvE - decimal.Decimal(277825)) + decimal.Decimal(106713.52)
 383             ESt_this_month = (ESt + last_monthbreak_est - est_expenses) / (12 - months_passed)
 384             left_over = needed_income_before_kk - ESt_this_month
 385             if abs(left_over - expenses_so_far) < 0.001:
 386                 break
 387             elif left_over < expenses_so_far:
 388                 too_low = needed_income_before_kk
 389             elif left_over > expenses_so_far:
 390                 too_high = needed_income_before_kk
 391             needed_income_before_kk = too_low + (too_high - too_low)/2
 392         ESt_this_month = ESt_this_month.quantize(decimal.Decimal('0.00'))
 393         ret += [f'  {acc_est}  {ESt_this_month}€ ; expenses so far: {expenses_so_far:.2f}€; zvE: {zvE:.2f}€; ESt total: {ESt:.2f}€; needed before Krankenkasse: {needed_income_before_kk:.2f}€']
 394         kk_minimum_income = 1131.67
 395         if date < '2023-02-01':
 396             kk_minimum_income = decimal.Decimal(1096.67)
 397             kk_factor = decimal.Decimal(0.189)
 398             kk_minimum_tax = decimal.Decimal(207.27).quantize(decimal.Decimal('0.00'))
 399         elif date < '2023-08-01':
 400             kk_factor = decimal.Decimal(0.191)
 401             kk_minimum_tax = decimal.Decimal(216.15).quantize(decimal.Decimal('0.00'))
 402         else:
 403             kk_factor = decimal.Decimal(0.197)
 404             kk_minimum_tax = decimal.Decimal(222.94).quantize(decimal.Decimal('0.00'))
 405         kk_add_so_far = account_sums[acc_kk_add]['€'] if acc_kk_add in account_sums.keys() else 0
 406         kk_add = needed_income_before_kk / (1 - kk_factor) - needed_income_before_kk - kk_minimum_tax
 407         hit_kk_minimum_income_limit = False
 408         if kk_add_so_far + kk_add < 0:
 409             hit_kk_minimum_income_limit = True
 410             kk_add_uncorrect = kk_add
 411             kk_add = -(kk_add + kk_add_so_far)
 412         kk_add = decimal.Decimal(kk_add).quantize(decimal.Decimal('0.00'))
 413         if finish:
 414             ret += [f'  {acc_kk_add}  {-last_monthbreak_kk_add}€  ; for old assumption of needed income']
 415         else:
 416             ret += [f'  {acc_kk_minimum}  {kk_minimum_tax}€  ; assumed minimum income {kk_minimum_income:.2f}€ * {kk_factor:.3f}']
 417         if hit_kk_minimum_income_limit:
 418             ret += [f'  {acc_kk_add}  {kk_add}€  ; {needed_income_before_kk:.2f}€ / (1 - {kk_factor:.3f}) - {needed_income_before_kk:.2f}€ - {kk_minimum_tax}€ = {kk_add_uncorrect:.2f}€ would reduce current {acc_kk_dd} ({kk_add_so_far:.2f}€) below 0']
 419         else:
 420             ret += [f'  {acc_kk_add}  {kk_add}€  ; {needed_income_before_kk:.2f}€ / (1 - {kk_factor:.3f}) - {needed_income_before_kk:.2f}€ - {kk_minimum_tax}€']
 421         diff = - last_monthbreak_est + ESt_this_month - last_monthbreak_kk_add + kk_add
 422         if not finish:
 423             diff += kk_minimum_tax
 424         final_minus = expenses_so_far - old_needed_income_before_anything + diff
 425         ret += [f'  {acc_assets}  {-diff} €']
 426         ret += [f'  {acc_assets}  {final_minus} €']
 427         year_needed = buffer_expenses + final_minus + (12 - months_passed - 1) * final_minus
 428         if finish:
 429             ret += [f'  {acc_buffer}  {-final_minus} €']
 430         else:
 431             ret += [f'  {acc_buffer}  {-final_minus} € ; assume as to earn in year: {acc_buffer} + {12 - months_passed - 1} * this = {year_needed}']
 432         return ret
 433
 434
 435 class LedgerServer(PlomServer):
 436     header = """<html>
 437 <meta charset="UTF-8">
 438 <style>
 439 body { color: #000000; }
 440 table { margin-bottom: 2em; }
 441 th, td { text-align: left }
 442 input[type=number] { text-align: right; font-family: monospace; }
 443 .money { font-family: monospace; text-align: right; }
 444 .comment { font-style: italic; color: #777777; }
 445 .meta { font-size: 0.75em; color: #777777; }
 446 .full_line_comment { display: block; white-space: nowrap; width: 0; }
 447 </style>
 448 <body>
 449 <a href="/">ledger</a>
 450 <a href="/balance">balance</a>
 451 <a href="/add_free">add free</a>
 452 <a href="/add_structured">add structured</a>
 453 <hr />
 454 """
 455     booking_tmpl = jinja2.Template("""
 456 <p id="{{nth}}"><a href="#{{nth}}">{{date}}</a> {{desc}} <span class="comment">{{head_comment|e}}</span><br />
 457 <span class="meta">[edit: <a href="/add_structured?start={{start}}&end={{end}}">structured</a>
 458 / <a href="/add_free?start={{start}}&end={{end}}">free</a>
 459 | copy:<a href="/copy_structured?start={{start}}&end={{end}}">structured</a>
 460 / <a href="/copy_free?start={{start}}&end={{end}}">free</a>
 461 | move {% if move_up %}<a href="/move_up?start={{start}}&end={{end}}">up</a>{% else %}up{% endif %}/{% if move_down %}<a href="/move_down?start={{start}}&end={{end}}">down</a>{% else %}down{% endif %}
 462 | <a href="/balance?stop={{nth+1}}">balance after</a>
 463 ]</span>
 464 <table>
 465 {% for l in booking_lines %}
 466 {% if l.acc %}
 467 <tr><td>{{l.acc|e}}</td><td class="money">{{l.money|e}}</td><td class="comment">{{l.comment|e}}</td></tr>
 468 {% else %}
 469 <tr><td><div class="comment full_line_comment">{{l.comment|e}}</div></td></tr>
 470 {% endif %}
 471 {% endfor %}
 472 </table></p>
 473 """)
 474     add_form_header = """<form method="POST" action="{{action|e}}">
 475 <input type="submit" name="check" value="check" />
 476 <input type="submit" name="revert" value="revert" />
 477 """
 478     add_form_footer = """
 479 <input type="hidden" name="start" value={{start}} />
 480 <input type="hidden" name="end" value={{end}} />
 481 <input type="submit" name="save" value="save!">
 482 </form>
 483 """
 484     footer = "</body>\n<html>"
 485
 486     def do_POST(self):
 487         try:
 488             parsed_url = urlparse(self.path)
 489             length = int(self.headers['content-length'])
 490             postvars = parse_qs(self.rfile.read(length).decode(), keep_blank_values=1)
 491             start = int(postvars['start'][0])
 492             end = int(postvars['end'][0])
 493             db = LedgerDB()
 494             add_empty_line = None
 495             lines = []
 496             # get inputs
 497             if '/add_structured' == parsed_url.path and not 'revert' in postvars.keys():
 498                 lines, add_empty_line = self.booking_lines_from_postvars(postvars, db)
 499             elif '/add_free' == parsed_url.path and not 'revert' in postvars.keys():
 500                 lines = postvars['booking'][0].splitlines()
 501             # validate where appropriate
 502             if ('save' in postvars.keys()) or ('check' in postvars.keys()):
 503                 _, _ = parse_lines(lines)
 504             # if saving, process where to and where to redirect after
 505             if 'save' in postvars.keys():
 506                 last_date = str(datetime.now())[:10]
 507                 if len(db.bookings) > 0:
 508                     last_date = db.bookings[-1].date_string
 509                 target_date = last_date[:]
 510                 first_line_tokens = lines[0].split() if len(lines) > 0 else ''
 511                 first_token = first_line_tokens[0] if len(first_line_tokens) > 0 else ''
 512                 try:
 513                     datetime.strptime(first_token, '%Y-%m-%d')
 514                     target_date = first_token
 515                 except ValueError:
 516                      pass
 517                 if start == end == 0:
 518                     start = db.insert_at_date(lines, target_date)
 519                     nth = db.get_nth_for_booking_of_start_line(start)
 520                 else:
 521                     new_start = db.update(start, end, lines, target_date)
 522                     nth = db.get_nth_for_booking_of_start_line(new_start)
 523                     if new_start > start:
 524                         nth -= 1
 525                 redir_url = f'/#{nth}'
 526                 self.send_code_and_headers(302, [('Location', redir_url)])
 527             # otherwise just re-build editing form
 528             else:
 529                 if '/add_structured' == parsed_url.path:
 530                     edit_content = self.add_structured(db, start, end, temp_lines=lines, add_empty_line=add_empty_line)
 531                 else:
 532                     edit_content = self.add_free(db, start, end)
 533                 self.send_HTML(self.header + edit_content + self.footer)
 534         except PlomException as e:
 535             self.fail_400(e)
 536
 537     def do_GET(self):
 538         try:
 539             parsed_url = urlparse(self.path)
 540             params = parse_qs(parsed_url.query)
 541             start = int(params.get('start', ['0'])[0])
 542             end = int(params.get('end', ['0'])[0])
 543             db = LedgerDB()
 544             page = self.header
 545             if parsed_url.path == '/balance':
 546                 stop = params.get('stop', [None])[0]
 547                 page += self.balance_as_html(db, stop)
 548             elif parsed_url.path == '/add_free':
 549                 page += self.add_free(db, start, end)
 550             elif parsed_url.path == '/add_structured':
 551                 page += self.add_structured(db, start, end)
 552             elif parsed_url.path == '/copy_free':
 553                 page += self.add_free(db, start, end, copy=True)
 554             elif parsed_url.path == '/copy_structured':
 555                 page += self.add_structured(db, start, end, copy=True)
 556             elif parsed_url.path == '/move_up':
 557                 nth = self.move_up(db, start, end)
 558                 self.send_code_and_headers(302, [('Location', f'/#{nth}')])
 559                 return
 560             elif parsed_url.path == '/move_down':
 561                 nth = self.move_down(db, start, end)
 562                 self.send_code_and_headers(302, [('Location', f'/#{nth}')])
 563                 return
 564             else:
 565                 page += self.ledger_as_html(db)
 566             page += self.footer
 567             self.send_HTML(page)
 568         except PlomException as e:
 569             self.fail_400(e)
 570
 571     def booking_lines_from_postvars(self, postvars, db):
 572         add_empty_line = None
 573         date = postvars['date'][0]
 574         description = postvars['description'][0]
 575         start_comment = postvars['line_0_comment'][0]
 576         start_line = f'{date} {description}'
 577         if start_comment.rstrip() != '':
 578             start_line += f' ; {start_comment}'
 579         lines = [start_line]
 580         if 'line_0_add' in postvars.keys():
 581             add_empty_line = 0
 582         i = j = 1
 583         while f'line_{i}_comment' in postvars.keys():
 584             if f'line_{i}_delete' in postvars.keys():
 585                 i += 1
 586                 continue
 587             elif f'line_{i}_delete_after' in postvars.keys():
 588                 break
 589             elif f'line_{i}_add' in postvars.keys():
 590                 add_empty_line = j
 591             account = postvars[f'line_{i}_account'][0]
 592             amount = postvars[f'line_{i}_amount'][0]
 593             currency = postvars[f'line_{i}_currency'][0]
 594             comment = postvars[f'line_{i}_comment'][0]
 595             i += 1
 596             new_main = f'  {account}  {amount}'
 597             if '' == new_main.rstrip() == comment.rstrip():  # don't write empty lines, ignore currency if nothing else set
 598                 continue
 599             if len(amount.rstrip()) > 0:
 600                 new_main += f' {currency}'
 601             j += 1
 602             new_line = new_main
 603             if comment.rstrip() != '':
 604                 new_line += f'  ; {comment}'
 605             lines += [new_line]
 606         if 'add_sink' in postvars.keys():
 607             temp_lines = lines.copy() + ['_']
 608             try:
 609                 temp_bookings, _ = parse_lines(temp_lines)
 610                 for currency in temp_bookings[0].sink:
 611                     amount = temp_bookings[0].sink[currency]
 612                     lines += [f'Assets  {amount:.2f} {currency}']
 613             except PlomException:
 614                 pass
 615         if 'add_taxes' in postvars.keys():
 616             lines += db.add_taxes(lines, finish=False)
 617         elif 'add_taxes2' in postvars.keys():
 618             lines += db.add_taxes(lines, finish=True)
 619         return lines, add_empty_line
 620
 621     def balance_as_html(self, db, until=None):
 622         bookings = db.bookings[:until if until is None else int(until)]
 623         lines = []
 624         account_tree, account_sums = bookings_to_account_tree(bookings)
 625         def print_subtree(lines, indent, node, subtree, path):
 626             line = f"{indent}{node}"
 627             n_tabs = 5 - (len(line) // 8)
 628             line += n_tabs * "\t"
 629             if "€" in account_sums[path + node].keys():
 630                 amount = account_sums[path + node]["€"]
 631                 line += f"{amount:9.2f} €\t"
 632             else:
 633                 line += f"\t\t"
 634             for currency, amount in account_sums[path + node].items():
 635                 if currency != '€' and amount > 0:
 636                     line += f"{amount:5.2f} {currency}\t"
 637             lines += [line]
 638             indent += "  "
 639             for k, v in sorted(subtree.items()):
 640                 print_subtree(lines, indent, k, v, path + node + ":")
 641         for k, v in sorted(account_tree.items()):
 642             print_subtree(lines, "", k, v, "")
 643         content = "\n".join(lines)
 644         return f"<pre>{content}</pre>"
 645
 646     def ledger_as_html(self, db):
 647         single_c_tmpl = jinja2.Template('<span class="comment">{{c|e}}</span><br />')  ##
 648         elements_to_write = []
 649         last_i = i = 0  ##
 650         for nth, booking in enumerate(db.bookings):
 651             move_up = nth > 0 and db.bookings[nth - 1].date_string == booking.date_string
 652             move_down = nth < len(db.bookings) - 1 and db.bookings[nth + 1].date_string == booking.date_string
 653             booking_end = last_i = booking.start_line + len(booking.lines)
 654             booking_lines = []
 655             i = booking.start_line  ##
 656             elements_to_write += [single_c_tmpl.render(c=c) for c in db.comments[last_i:i] if c != '']  ##
 657             for booking_line in booking.lines[1:]:
 658                  i += 1  ##
 659                  comment = db.comments[i]  ##
 660                  if booking_line == '':
 661                      booking_lines += [{'acc': None, 'money': None, 'comment': comment}]  ##
 662                      continue
 663                  account = booking_line[0]
 664                  money = ''
 665                  if booking_line[1] is not None:
 666                      money = f'{booking_line[1]} {booking_line[2]}'
 667                  booking_lines += [{'acc': booking_line[0], 'money':money, 'comment':comment}]  ##
 668             elements_to_write += [self.booking_tmpl.render(
 669                 nth=nth,
 670                 start=booking.start_line,
 671                 end=booking_end,
 672                 date=booking.date_string,
 673                 desc=booking.description,
 674                 head_comment=db.comments[booking.start_line],
 675                 move_up=move_up,
 676                 move_down=move_down,
 677                 booking_lines = booking_lines)]
 678         elements_to_write += [single_c_tmpl.render(c=c) for c in db.comments[last_i:] if c != '']  #
 679         return '\n'.join(elements_to_write)
 680
 681     def add_free(self, db, start=0, end=0, copy=False):
 682         tmpl = jinja2.Template(self.add_form_header + """<br />
 683 <textarea name="booking" rows=10 cols=80>
 684 {% for line in lines %}{{ line }}
 685 {% endfor %}
 686 </textarea>
 687 """ + self.add_form_footer)
 688         lines = db.get_lines(start, end)
 689         if copy:
 690             start = end = 0
 691         return tmpl.render(action='add_free', start=start, end=end, lines=lines)
 692
 693     def add_structured(self, db, start=0, end=0, copy=False, temp_lines=[], add_empty_line=None):
 694         tmpl = jinja2.Template(self.add_form_header + """
 695 <input type="submit" name="add_taxes" value="add taxes" />
 696 <input type="submit" name="add_taxes2" value="add taxes2" />
 697 <input type="submit" name="add_sink" value="add sink" />
 698 <br />
 699 <input name="date" value="{{date|e}}" size=9 />
 700 <input name="description" value="{{desc|e}}" list="descriptions" />
 701 <textarea name="line_0_comment" rows=1 cols=20>{{head_comment|e}}</textarea>
 702 <input type="submit" name="line_0_add" value="[+]" />
 703 <br />
 704 {% for line in booking_lines %}
 705 <input name="line_{{line.i}}_account" value="{{line.acc|e}}" size=40 list="accounts" />
 706 <input type="number" name="line_{{line.i}}_amount" step=0.01 value="{{line.amt}}" size=10 />
 707 <input name="line_{{line.i}}_currency" value="{{line.curr|e}}" size=3 list="currencies" />
 708 <input type="submit" name="line_{{line.i}}_delete" value="[x]" />
 709 <input type="submit" name="line_{{line.i}}_delete_after" value="[XX]" />
 710 <input type="submit" name="line_{{line.i}}_add" value="[+]" />
 711 <textarea name="line_{{line.i}}_comment" rows=1 cols={% if line.comm_cols %}{{line.comm_cols}}{% else %}20{% endif %}>{{line.comment|e}}</textarea>
 712 <br />
 713 {% endfor %}
 714 {% for name, items in datalist_sets.items() %}
 715 <datalist id="{{name}}">
 716 {% for item in items %}
 717   <option value="{{item|e}}">{{item|e}}</option>
 718 {% endfor %}
 719 </datalist>
 720 {% endfor %}
 721 """ + self.add_form_footer)
 722         lines = temp_lines if len(''.join(temp_lines)) > 0 else db.get_lines(start, end)
 723         bookings, comments = parse_lines(lines, validate_bookings=False)
 724         if len(bookings) > 1:
 725             raise PlomException('can only structurally edit single Booking')
 726         if add_empty_line is not None:
 727             comments = comments[:add_empty_line+1] + [''] + comments[add_empty_line+1:]
 728             booking = bookings[0]
 729             booking.lines = booking.lines[:add_empty_line+1] + [''] + booking.lines[add_empty_line+1:]
 730         action = 'add_structured'
 731         datalist_sets = {'descriptions': set(), 'accounts': set(), 'currencies': set()}
 732         for b in db.bookings:
 733             datalist_sets['descriptions'].add(b.description)
 734             for account, moneys in b.account_changes.items():
 735                 datalist_sets['accounts'].add(account)
 736                 for currency in moneys.keys():
 737                     datalist_sets['currencies'].add(currency)
 738         content = ''
 739         today = str(datetime.now())[:10]
 740         booking_lines = []
 741         if copy:
 742             start = end = 0
 743         desc = head_comment = ''
 744         if len(bookings) == 0:
 745             for i in range(1, 3):
 746                 booking_lines += [{'i': i, 'acc': '', 'amt': '', 'curr': '€', 'comment': ''}]
 747             date=today
 748         else:
 749             booking = bookings[0]
 750             desc = booking.description
 751             date = today if copy else booking.date_string
 752             head_comment=comments[0]
 753             last_line = len(comments)
 754             for i in range(1, len(comments)):
 755                 account = amount = currency = ''
 756                 if i < len(booking.lines) and booking.lines[i] != '':
 757                     account = booking.lines[i][0]
 758                     amount = booking.lines[i][1]
 759                     currency = booking.lines[i][2]
 760                 booking_lines += [{
 761                         'i': i,
 762                         'acc': account,
 763                         'amt': amount,
 764                         'curr': currency if currency else '€',
 765                         'comment': comments[i],
 766                         'comm_cols': len(comments[i])}]
 767         content += tmpl.render(
 768                 action=action,
 769                 date=date,
 770                 desc=desc,
 771                 head_comment=head_comment,
 772                 booking_lines=booking_lines,
 773                 datalist_sets=datalist_sets,
 774                 start=start,
 775                 end=end)
 776         return content
 777
 778     def move_up(self, db, start, end):
 779         prev_booking = None
 780         for redir_nth, b in enumerate(db.bookings):
 781             if b.start_line >= start:
 782                 break
 783             prev_booking = b
 784         start_at = prev_booking.start_line
 785         self.make_move(db, start, end, start_at)
 786         return redir_nth - 1
 787
 788     def move_down(self, db, start, end):
 789         next_booking = None
 790         for redir_nth, b in enumerate(db.bookings):
 791             if b.start_line > start:
 792                 next_booking = b
 793                 break
 794         start_at = next_booking.start_line + len(next_booking.lines) - (end - start) + 1
 795         self.make_move(db, start, end, start_at)
 796         return redir_nth
 797
 798     def make_move(self, db, start, end, start_at):
 799         lines = db.get_lines(start, end)
 800         total_lines = db.real_lines[:start] + db.real_lines[end:]
 801         db.write_lines_in_total_lines_at(total_lines, start_at, lines)
 802
 803
 804 if __name__ == "__main__":
 805     run_server(server_port, LedgerServer)