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

   1 from http.server import BaseHTTPRequestHandler, HTTPServer
   2 import sys
   3 import os
   4 import html
   5 import jinja2
   6 import decimal
   7 from urllib.parse import parse_qs, urlparse
   8 hostName = "localhost"
   9 serverPort = 8082
  10
  11
  12 class HandledException(Exception):
  13     pass
  14
  15
  16 def handled_error_exit(msg):
  17     print(f"ERROR: {msg}")
  18     sys.exit(1)
  19
  20
  21 def apply_booking_to_account_balances(account_sums, account, currency, amount):
  22     if not account in account_sums:
  23         account_sums[account] = {currency: amount}
  24     elif not currency in account_sums[account].keys():
  25         account_sums[account][currency] = amount
  26     else:
  27         account_sums[account][currency] += amount
  28
  29
  30 def bookings_to_account_tree(bookings):
  31     account_sums = {}
  32     for booking in bookings:
  33         for account, changes in booking.account_changes.items():
  34             for currency, amount in changes.items():
  35                 apply_booking_to_account_balances(account_sums, account, currency, amount)
  36     account_tree = {}
  37     def collect_branches(account_name, path):
  38         node = account_tree
  39         path_copy = path[:]
  40         while len(path_copy) > 0:
  41             step = path_copy.pop(0)
  42             node = node[step]
  43         toks = account_name.split(":", maxsplit=1)
  44         parent = toks[0]
  45         if parent in node.keys():
  46             child = node[parent]
  47         else:
  48             child = {}
  49             node[parent] = child
  50         if len(toks) == 2:
  51             k, v = collect_branches(toks[1], path + [parent])
  52             if k not in child.keys():
  53                 child[k] = v
  54             else:
  55                 child[k].update(v)
  56         return parent, child
  57     for account_name in sorted(account_sums.keys()):
  58         k, v = collect_branches(account_name, [])
  59         if k not in account_tree.keys():
  60             account_tree[k] = v
  61         else:
  62             account_tree[k].update(v)
  63     def collect_totals(parent_path, tree_node):
  64         for k, v in tree_node.items():
  65             child_path = parent_path + ":" + k
  66             for currency, amount in collect_totals(child_path, v).items():
  67                 apply_booking_to_account_balances(account_sums, parent_path, currency, amount)
  68         return account_sums[parent_path]
  69     for account_name in account_tree.keys():
  70         account_sums[account_name] = collect_totals(account_name, account_tree[account_name])
  71     return account_tree, account_sums
  72
  73
  74 def parse_lines(lines, validate_bookings=True):
  75     import datetime
  76     inside_booking = False
  77     date_string, description = None, None
  78     booking_lines = []
  79     start_line = 0
  80     bookings = []
  81     comments = []
  82     lines = lines.copy() + [''] # to ensure a booking-ending last line
  83     for i, line in enumerate(lines):
  84         prefix = f"line {i}"
  85         # we start with the case of an utterly empty line
  86         comments += [""]
  87         stripped_line = line.rstrip()
  88         if stripped_line == '':
  89             if inside_booking:
  90                 # assume we finished a booking, finalize, and commit to DB
  91                 if len(booking_lines) < 2:
  92                     raise HandledException(f"{prefix} booking ends to early")
  93                 booking = Booking(date_string, description, booking_lines, start_line, validate_bookings)
  94                 bookings += [booking]
  95             # expect new booking to follow so re-zeroall booking data
  96             inside_booking = False
  97             date_string, description = None, None
  98             booking_lines = []
  99             continue
 100         # if non-empty line, first get comment if any, and commit to DB
 101         split_by_comment = stripped_line.split(sep=";", maxsplit=1)
 102         if len(split_by_comment) == 2:
 103             comments[i] = split_by_comment[1].lstrip()
 104         # 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
 105         non_comment = split_by_comment[0].rstrip()
 106         if non_comment.rstrip() == '':
 107              if inside_booking:
 108                  booking_lines += ['']
 109              continue
 110         # if we're starting a booking, parse by first-line pattern
 111         if not inside_booking:
 112             start_line = i
 113             toks = non_comment.split(maxsplit=1)
 114             date_string = toks[0]
 115             try:
 116                 datetime.datetime.strptime(date_string, '%Y-%m-%d')
 117             except ValueError:
 118                 raise HandledException(f"{prefix} bad date string: {date_string}")
 119             try:
 120                 description = toks[1]
 121             except IndexError:
 122                 raise HandledException(f"{prefix} bad description: {description}")
 123             inside_booking = True
 124             booking_lines += [non_comment]
 125             continue
 126         # otherwise, read as transfer data
 127         toks = non_comment.split()  # ignore specification's allowance of single spaces in names
 128         if len(toks) > 3:
 129             raise HandledException(f"{prefix} too many booking line tokens: {toks}")
 130         amount, currency = None, None
 131         account_name = toks[0]
 132         if account_name[0] == '[' and account_name[-1] == ']':
 133             # ignore specification's differentiation of "virtual" accounts
 134             account_name = account_name[1:-1]
 135         decimal_chars = ".-0123456789"
 136         if len(toks) == 3:
 137             i_currency = 1
 138             try:
 139                 amount = decimal.Decimal(toks[1])
 140                 i_currency = 2
 141             except decimal.InvalidOperation:
 142                 try:
 143                     amount = decimal.Decimal(toks[2])
 144                 except decimal.InvalidOperation:
 145                     raise HandledException(f"{prefix} no decimal number in: {toks[1:]}")
 146             currency = toks[i_currency]
 147             if currency[0] in decimal_chars:
 148                 raise HandledException(f"{prefix} currency starts with int, dot, or minus: {currency}")
 149         elif len(toks) == 2:
 150             value = toks[1]
 151             inside_amount = False
 152             inside_currency = False
 153             amount_string = ""
 154             currency = ""
 155             dots_counted = 0
 156             for i, c in enumerate(value):
 157                 if i == 0:
 158                     if c in decimal_chars:
 159                         inside_amount = True
 160                     else:
 161                         inside_currency = True
 162                 if inside_currency:
 163                     if c in decimal_chars and len(amount_string) == 0:
 164                         inside_currency = False
 165                         inside_amount = True
 166                     else:
 167                         currency += c
 168                         continue
 169                 if inside_amount:
 170                     if c not in decimal_chars:
 171                         if len(currency) > 0:
 172                             raise HandledException(f"{prefix} amount has non-decimal chars: {value}")
 173                         inside_currency = True
 174                         inside_amount = False
 175                         currency += c
 176                         continue
 177                     if c == '-' and len(amount_string) > 1:
 178                         raise HandledException(f"{prefix} amount has non-start '-': {value}")
 179                     if c == '.':
 180                         if dots_counted > 1:
 181                             raise HandledException(f"{prefix} amount has multiple dots: {value}")
 182                         dots_counted += 1
 183                     amount_string += c
 184             if len(amount_string) == 0:
 185                 raise HandledException(f"{prefix} amount missing: {value}")
 186             if len(currency) == 0:
 187                 raise HandledException(f"{prefix} currency missing: {value}")
 188             amount = decimal.Decimal(amount_string)
 189         booking_lines += [(account_name, amount, currency)]
 190     if inside_booking:
 191         raise HandledException(f"{prefix} last booking unfinished")
 192     return bookings, comments
 193
 194
 195 class Booking:
 196
 197     def __init__(self, date_string, description, booking_lines, start_line, process=True):
 198         self.date_string = date_string
 199         self.description = description
 200         self.lines = booking_lines
 201         self.start_line = start_line
 202         if process:
 203             self.validate_booking_lines()
 204             self.sink = {}
 205             self.account_changes = self.parse_booking_lines_to_account_changes()
 206
 207     def validate_booking_lines(self):
 208         prefix = f"booking at line {self.start_line}"
 209         sums = {}
 210         empty_values = 0
 211         for line in self.lines[1:]:
 212             if line == '':
 213                 continue
 214             _, amount, currency = line
 215             if amount is None:
 216                 if empty_values > 0:
 217                     raise HandledException(f"{prefix} relates more than one empty value of same currency {currency}")
 218                 empty_values += 1
 219                 continue
 220             if currency not in sums:
 221                 sums[currency] = 0
 222             sums[currency] += amount
 223         if empty_values == 0:
 224             for k, v in sums.items():
 225                 if v != 0:
 226                     raise HandledException(f"{prefix} does not add up to zero / {k} {v}")
 227         else:
 228             sinkable = False
 229             for k, v in sums.items():
 230                 if v != 0:
 231                     sinkable = True
 232             if not sinkable:
 233                 raise HandledException(f"{prefix} has empty value that cannot be filled")
 234
 235     def parse_booking_lines_to_account_changes(self):
 236         account_changes = {}
 237         debt = {}
 238         sink_account = None
 239         for line in self.lines[1:]:
 240             if line == '':
 241                 continue
 242             account, amount, currency = line
 243             if amount is None:
 244                 sink_account = account
 245                 continue
 246             apply_booking_to_account_balances(account_changes, account, currency, amount)
 247             if currency not in debt:
 248                 debt[currency] = amount
 249             else:
 250                 debt[currency] += amount
 251         if sink_account:
 252             for currency, amount in debt.items():
 253                 apply_booking_to_account_balances(account_changes, sink_account, currency, -amount)
 254                 self.sink[currency] = -amount
 255         return account_changes
 256
 257
 258
 259 class Database:
 260
 261     def __init__(self):
 262         db_name = "_ledger"
 263         self.db_file = db_name + ".json"
 264         self.lock_file = db_name+ ".lock"
 265         self.bookings = []
 266         self.comments = []
 267         self.real_lines = []
 268         if os.path.exists(self.db_file):
 269             with open(self.db_file, "r") as f:
 270                 self.real_lines += [l.rstrip() for l in f.readlines()]
 271         ret = parse_lines(self.real_lines)
 272         self.bookings += ret[0]
 273         self.comments += ret[1]
 274
 275     def get_lines(self, start, end):
 276         return self.real_lines[start:end]
 277
 278     def replace(self, start, end, lines):
 279         import shutil
 280         if os.path.exists(self.lock_file):
 281             raise HandledException('Sorry, lock file!')
 282         if os.path.exists(self.db_file):
 283             shutil.copy(self.db_file, self.db_file + ".bak")
 284         f = open(self.lock_file, 'w+')
 285         f.close()
 286         total_lines = self.real_lines[:start] + lines + self.real_lines[end:]
 287         text = '\n'.join(total_lines)
 288         with open(self.db_file, 'w') as f:
 289             f.write(text);
 290         os.remove(self.lock_file)
 291
 292     def append(self, lines):
 293         import shutil
 294         if os.path.exists(self.lock_file):
 295             raise HandledException('Sorry, lock file!')
 296         if os.path.exists(self.db_file):
 297             shutil.copy(self.db_file, self.db_file + ".bak")
 298         f = open(self.lock_file, 'w+')
 299         f.close()
 300         with open(self.db_file, 'a') as f:
 301             f.write('\n\n' + '\n'.join(lines) + '\n\n');
 302         os.remove(self.lock_file)
 303
 304     def add_taxes(self, lines, finish=False):
 305         ret = []
 306         bookings, _ = parse_lines(lines)
 307         date = bookings[0].date_string
 308         acc_kk_add = 'Reserves:KrankenkassenBeitragsWachstum'
 309         acc_kk_minimum = 'Reserves:Month:KrankenkassenDefaultBeitrag'
 310         acc_kk = 'Expenses:KrankenKasse'
 311         acc_est = 'Reserves:Einkommenssteuer'
 312         acc_assets = 'Assets'
 313         acc_buffer = 'Reserves:NeuAnfangsPuffer:Ausgaben'
 314         last_monthbreak_assets = 0
 315         last_monthbreak_est = 0
 316         last_monthbreak_kk_minimum = 0
 317         last_monthbreak_kk_add = 0
 318         buffer_expenses = 0
 319         kk_expenses = 0
 320         est_expenses = 0
 321         for b in self.bookings:
 322             if date == b.date_string:
 323                 break
 324             acc_keys = b.account_changes.keys()
 325             if acc_buffer in acc_keys:
 326                 buffer_expenses -= b.account_changes[acc_buffer]['€']
 327             if acc_kk_add in acc_keys:
 328                 kk_expenses += b.account_changes[acc_kk_add]['€']
 329             if acc_kk in acc_keys:
 330                 kk_expenses += b.account_changes[acc_kk]['€']
 331             if acc_est in acc_keys:
 332                 est_expenses += b.account_changes[acc_est]['€']
 333             if finish and acc_kk_add in acc_keys and acc_kk_minimum in acc_keys:
 334                 last_monthbreak_kk_add = b.account_changes[acc_kk_add]['€']
 335                 last_monthbreak_est = b.account_changes[acc_est]['€']
 336                 last_monthbreak_kk_minimum = b.account_changes[acc_kk_minimum]['€']
 337                 last_monthbreak_assets = b.account_changes[acc_buffer]['€']
 338         old_needed_income = last_monthbreak_assets + last_monthbreak_kk_add + last_monthbreak_kk_minimum + last_monthbreak_est
 339         if finish:
 340             ret += [f'  {acc_est}  {-last_monthbreak_est}€ ; for old assumption of needed income: {old_needed_income}€']
 341         _, account_sums = bookings_to_account_tree(bookings)
 342         expenses_so_far = -1 * account_sums[acc_assets]['€'] - old_needed_income
 343         needed_income_before_kk = expenses_so_far
 344         ESt_this_month = 0
 345         left_over = needed_income_before_kk - ESt_this_month
 346         too_low = 0
 347         too_high = 2 * needed_income_before_kk
 348         E0 = decimal.Decimal(10908)
 349         E1 = decimal.Decimal(15999)
 350         E2 = decimal.Decimal(62809)
 351         E3 = decimal.Decimal(277825)
 352         months_passed = int(date[5:7]) - 1
 353         while True:
 354             zvE = buffer_expenses - kk_expenses + (12 - months_passed) * needed_income_before_kk
 355             if finish:
 356                 zvE += last_monthbreak_assets + last_monthbreak_kk_add + last_monthbreak_kk_minimum
 357             if zvE < E0:
 358                 ESt = decimal.Decimal(0)
 359             elif zvE < E1:
 360                 y = (zvE - E0)/10000
 361                 ESt = (decimal.Decimal(979.18) * y + 1400) * y
 362             elif zvE < E2:
 363                 y = (zvE - E1)/10000
 364                 ESt = (decimal.Decimal(192.59) * y + 2397) * y + decimal.Decimal(966.53)
 365             elif zvE < E3:
 366                 ESt = decimal.Decimal(0.42) * (zvE - decimal.Decimal(62809))  + decimal.Decimal(16405.54)
 367             else:
 368                 ESt = decimal.Decimal(0.45) * (zvE - decimal.Decimal(277825)) + decimal.Decimal(106713.52)
 369             ESt_this_month = (ESt + last_monthbreak_est - est_expenses) / (12 - months_passed)
 370             left_over = needed_income_before_kk - ESt_this_month
 371             if abs(left_over - expenses_so_far) < 0.001:
 372                 break
 373             elif left_over < expenses_so_far:
 374                 too_low = needed_income_before_kk
 375             elif left_over > expenses_so_far:
 376                 too_high = needed_income_before_kk
 377             needed_income_before_kk = too_low + (too_high - too_low)/2
 378         ESt_this_month = ESt_this_month.quantize(decimal.Decimal('0.00'))
 379         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}€']
 380         kk_minimum_income = 1131.67
 381         if date < '2023-02-01':
 382             kk_minimum_income = decimal.Decimal(1096.67)
 383             kk_factor = decimal.Decimal(0.189)
 384             kk_minimum_tax = decimal.Decimal(207.27).quantize(decimal.Decimal('0.00'))
 385         elif date < '2023-08-01':
 386             kk_factor = decimal.Decimal(0.191)
 387             kk_minimum_tax = decimal.Decimal(216.15).quantize(decimal.Decimal('0.00'))
 388         else:
 389             kk_factor = decimal.Decimal(0.197)
 390             kk_minimum_tax = decimal.Decimal(222.94).quantize(decimal.Decimal('0.00'))
 391         kk_add = max(0, kk_factor * needed_income_before_kk - kk_minimum_tax)
 392         kk_add = decimal.Decimal(kk_add).quantize(decimal.Decimal('0.00'))
 393         if finish:
 394             ret += [f'  {acc_kk_add}  {-last_monthbreak_kk_add}€  ; max(0, {kk_factor:.3f} * {-(old_needed_income - last_monthbreak_est):.2f}€ - {kk_minimum_tax}€)']
 395         else:
 396             ret += [f'  {acc_kk_minimum}  {kk_minimum_tax}€  ; assumed minimum income {kk_minimum_income:.2f}€ * {kk_factor:.3f}']
 397         ret += [f'  {acc_kk_add}  {kk_add}€  ; max(0, {kk_factor:.3f} * {needed_income_before_kk:.2f}€ - {kk_minimum_tax}€)']
 398         diff = - last_monthbreak_est + ESt_this_month - last_monthbreak_kk_add + kk_add
 399         if not finish:
 400             diff += kk_minimum_tax
 401         final_minus = expenses_so_far + old_needed_income + diff
 402         ret += [f'  {acc_assets}  {-diff} €']
 403         ret += [f'  {acc_assets}  {final_minus} €']
 404         ret += [f'  {acc_buffer}  {-final_minus} €']
 405         return ret
 406
 407
 408 class MyServer(BaseHTTPRequestHandler):
 409     header = """<html>
 410 <meta charset="UTF-8">
 411 <style>
 412 body { color: #000000; }
 413 table { margin-bottom: 2em; }
 414 th, td { text-align: left }
 415 input[type=number] { text-align: right; font-family: monospace; }
 416 .money { font-family: monospace; text-align: right; }
 417 .comment { font-style: italic; color: #777777; }
 418 .meta { font-size: 0.75em; color: #777777; }
 419 .full_line_comment { display: block; white-space: nowrap; width: 0; }
 420 </style>
 421 <body>
 422 <a href="/ledger1">ledger1</a>
 423 <a href="/ledger2">ledger2</a>
 424 <a href="/balance">balance</a>
 425 <a href="/add_free">add free</a>
 426 <a href="/add_structured">add structured</a>
 427 <hr />
 428 """
 429     booking_tmpl = jinja2.Template("""
 430 <p id="{{start}}"><a href="#{{start}}">{{date}}</a> {{desc}} <span class="comment">{{head_comment|e}}</span><br />
 431 <span class="meta">[edit: <a href="/add_structured?start={{start}}&end={{end}}">structured</a>
 432 / <a href="/add_free?start={{start}}&end={{end}}">free</a>
 433 | copy:<a href="/copy_structured?start={{start}}&end={{end}}">structured</a>
 434 / <a href="/copy_free?start={{start}}&end={{end}}">free</a>
 435 | balance <a href="/balance?stop={{date}}&plus={{steps_after_date}}">before</a> or <a href="/balance?stop={{date}}&plus={{steps_after_date + 1}}">after</a>
 436 ]</span>
 437 <table>
 438 {% for l in booking_lines %}
 439 {% if l.acc %}
 440 <tr><td>{{l.acc|e}}</td><td class="money">{{l.money|e}}</td><td class="comment">{{l.comment|e}}</td></tr>
 441 {% else %}
 442 <tr><td><div class="comment full_line_comment">{{l.comment|e}}</div></td></tr>
 443 {% endif %}
 444 {% endfor %}
 445 </table></p>
 446 """)
 447     footer = "</body>\n<html>"
 448
 449     def do_POST(self):
 450         db = Database()
 451         length = int(self.headers['content-length'])
 452         postvars = parse_qs(self.rfile.read(length).decode(), keep_blank_values=1)
 453         parsed_url = urlparse(self.path)
 454         lines = []
 455         add_empty_line = None
 456         start = int(postvars['start'][0])
 457         end = int(postvars['end'][0])
 458         if '/add_structured' == parsed_url.path and not 'revert' in postvars.keys():
 459             date = postvars['date'][0]
 460             description = postvars['description'][0]
 461             start_comment = postvars['line_0_comment'][0]
 462             lines = [f'{date} {description} ; {start_comment}']
 463             if 'line_0_add' in postvars.keys():
 464                 add_empty_line = 0
 465             i = j = 1
 466             while f'line_{i}_comment' in postvars.keys():
 467                 if f'line_{i}_delete' in postvars.keys():
 468                     i += 1
 469                     continue
 470                 elif f'line_{i}_delete_after' in postvars.keys():
 471                     break
 472                 elif f'line_{i}_add' in postvars.keys():
 473                     add_empty_line = j
 474                 account = postvars[f'line_{i}_account'][0]
 475                 amount = postvars[f'line_{i}_amount'][0]
 476                 currency = postvars[f'line_{i}_currency'][0]
 477                 comment = postvars[f'line_{i}_comment'][0]
 478                 i += 1
 479                 new_main = f'{account} {amount} {currency}'
 480                 if '' == new_main.rstrip() == comment.rstrip():  # don't write empty lines
 481                     continue
 482                 j += 1
 483                 new_line = new_main
 484                 if comment.rstrip() != '':
 485                     new_line += f' ; {comment}'
 486                 lines += [new_line]
 487             if 'add_taxes' in postvars.keys():
 488                 lines += db.add_taxes(lines, finish=False)
 489             elif 'add_taxes2' in postvars.keys():
 490                 lines += db.add_taxes(lines, finish=True)
 491         elif '/add_free' == parsed_url.path:
 492             lines = postvars['booking'][0].splitlines()
 493         try:
 494             if ('save' in postvars.keys()) or ('check' in postvars.keys()):
 495                 _, _ = parse_lines(lines)
 496             if 'save' in postvars.keys():
 497                 if start == end == 0:
 498                     db.append(lines)
 499                     redir_url = f'/#last'
 500                 else:
 501                     db.replace(start, end, lines)
 502                     redir_url = f'/#{start}'
 503                 self.send_response(301)
 504                 self.send_header('Location', redir_url)
 505                 self.end_headers()
 506             else:
 507                 page = self.header + self.add_structured(db, start, end, temp_lines=lines, add_empty_line=add_empty_line) + self.footer
 508                 self.send_response(200)
 509                 self.send_header("Content-type", "text/html")
 510                 self.end_headers()
 511                 self.wfile.write(bytes(page, "utf-8"))
 512         except HandledException as e:
 513             self.send_response(400)
 514             self.send_header("Content-type", "text/html")
 515             self.end_headers()
 516             page = f'{self.header}ERROR: {e}{self.footer}'
 517             self.wfile.write(bytes(page, "utf-8"))
 518
 519     def do_GET(self):
 520         self.send_response(200)
 521         self.send_header("Content-type", "text/html")
 522         self.end_headers()
 523         db = Database()
 524         parsed_url = urlparse(self.path)
 525         page = self.header + ''
 526         params = parse_qs(parsed_url.query)
 527         start = int(params.get('start', ['0'])[0])
 528         end = int(params.get('end', ['0'])[0])
 529         if parsed_url.path == '/balance':
 530             stop_date = params.get('stop', [None])[0]
 531             plus = int(params.get('plus', [0])[0])
 532             page += self.balance_as_html(db, stop_date, plus)
 533         elif parsed_url.path == '/add_free':
 534             page += self.add_free(db, start, end)
 535         elif parsed_url.path == '/add_structured':
 536             page += self.add_structured(db, start, end)
 537         elif parsed_url.path == '/copy_free':
 538             page += self.add_free(db, start, end, copy=True)
 539         elif parsed_url.path == '/copy_structured':
 540             page += self.add_structured(db, start, end, copy=True)
 541         elif parsed_url.path == '/ledger2':
 542             page += self.ledger2_as_html(db)
 543         else:
 544             page += self.ledger_as_html(db)
 545         page += self.footer
 546         self.wfile.write(bytes(page, "utf-8"))
 547
 548     def balance_as_html(self, db, stop_date=None, plus=0):
 549         lines = []
 550         bookings = db.bookings
 551         if stop_date:
 552             bookings = []
 553             i = -1
 554             for b in db.bookings:
 555                 if b.date_string == stop_date:
 556                     if -1 == i:
 557                         i = 0
 558                 if i >= plus:
 559                     break
 560                 if i > -1:
 561                     i += 1
 562                 bookings += [b]
 563         account_tree, account_sums = bookings_to_account_tree(bookings)
 564         def print_subtree(lines, indent, node, subtree, path):
 565             line = f"{indent}{node}"
 566             n_tabs = 5 - (len(line) // 8)
 567             line += n_tabs * "\t"
 568             if "€" in account_sums[path + node].keys():
 569                 amount = account_sums[path + node]["€"]
 570                 line += f"{amount:9.2f} €\t"
 571             else:
 572                 line += f"\t\t"
 573             for currency, amount in account_sums[path + node].items():
 574                 if currency != '€' and amount > 0:
 575                     line += f"{amount:5.2f} {currency}\t"
 576             lines += [line]
 577             indent += "  "
 578             for k, v in sorted(subtree.items()):
 579                 print_subtree(lines, indent, k, v, path + node + ":")
 580         for k, v in sorted(account_tree.items()):
 581             print_subtree(lines, "", k, v, "")
 582         content = "\n".join(lines)
 583         return f"<pre>{content}</pre>"
 584
 585     def ledger_as_html(self, db):
 586         elements_to_write = []
 587         account_sums = {}  ##
 588         nth_of_same_date = 0
 589         same_date = ''
 590         for booking in db.bookings:
 591             if booking.date_string == same_date:
 592                 nth_of_same_date += 1
 593             else:
 594                 same_date = booking.date_string
 595                 nth_of_same_date = 0
 596             booking_end = booking.start_line + len(booking.lines)
 597             booking_lines = []
 598             for booking_line in booking.lines[1:]:
 599                 if booking_line == '':
 600                     continue
 601                 account = booking_line[0]  ##
 602                 account_toks = account.split(':')  ##
 603                 path = ''  ##
 604                 for tok in account_toks: ##
 605                     path += tok  ##
 606                     if not path in account_sums.keys():  ##
 607                         account_sums[path] = {}  ##
 608                     path += ':'  ##
 609                 moneys = []  ##
 610                 money = ''
 611                 if booking_line[1] is not None:
 612                     moneys += [(booking_line[1], booking_line[2])]  ##
 613                     money = f'{moneys[0][0]} {moneys[0][1]}'
 614                 else:  ##
 615                     for currency, amount in booking.sink.items():  ##
 616                         moneys += {(amount, currency)}  ##
 617                     money = '['  ##
 618                     for m in moneys:  ##
 619                         money += f'{m[0]} {m[1]} ' ##
 620                     money += ']'  ##
 621                 balance = ''  ##
 622                 for amount, currency in moneys:  ##
 623                     path = ''  ##
 624                     for tok in account_toks:  ##
 625                         path += tok  ##
 626                         if not currency in account_sums[path].keys():  ##
 627                             account_sums[path][currency] = 0  ##
 628                         account_sums[path][currency] += amount  ##
 629                         path += ':'   ##
 630                     balance += f'{account_sums[account][currency]} {currency}'  ##
 631                 booking_lines += [{'acc': booking_line[0], 'money':money, 'comment':balance}]  ##
 632             elements_to_write += [self.booking_tmpl.render(
 633                 start=booking.start_line,
 634                 end=booking_end,
 635                 date=booking.date_string,
 636                 desc=booking.description,
 637                 head_comment=db.comments[booking.start_line],
 638                 steps_after_date=nth_of_same_date,
 639                 booking_lines = booking_lines)]
 640         return '\n'.join(elements_to_write)
 641
 642     def ledger2_as_html(self, db):
 643         single_c_tmpl = jinja2.Template('<span class="comment">{{c|e}}</span><br />')
 644         elements_to_write = []
 645         last_i = i = 0  ##
 646         nth_of_same_date = 0
 647         same_date = ''
 648         for booking in db.bookings:
 649             if booking.date_string == same_date:
 650                 nth_of_same_date += 1
 651             else:
 652                 same_date = booking.date_string
 653                 nth_of_same_date = 0
 654             i = booking.start_line  ##
 655             elements_to_write += [single_c_tmpl.render(c=c) for c in db.comments[last_i:i] if c != '']  ##
 656             booking_end = last_i = booking.start_line + len(booking.lines)
 657             booking_lines = []
 658             for booking_line in booking.lines[1:]:
 659                  i += 1
 660                  comment = db.comments[i]
 661                  if booking_line == '':
 662                      booking_lines += [{'acc': None, 'money': None, 'comment': comment}]
 663                      continue
 664                  account = booking_line[0]
 665                  money = ''
 666                  if booking_line[1] is not None:
 667                      money = f'{booking_line[1]} {booking_line[2]}'
 668                  booking_lines += [{'acc': booking_line[0], 'money':money, 'comment':comment}]  ##
 669             elements_to_write += [self.booking_tmpl.render(
 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                 steps_after_date=nth_of_same_date,
 676                 booking_lines = booking_lines)]
 677         elements_to_write += [single_c_tmpl.render(c=c) for c in db.comments[last_i:] if c != '']
 678         return '\n'.join(elements_to_write)
 679
 680     def add_free(self, db, start=0, end=0, copy=False):
 681         tmpl = jinja2.Template("""
 682 <form method="POST" action="{{action|e}}">
 683 <textarea name="booking" rows=10 cols=80>
 684 {% for line in lines %}{{ line }}
 685 {% endfor %}
 686 </textarea>
 687 <input type="hidden" name="start" value={{start}} />
 688 <input type="hidden" name="end" value={{end}} />
 689 <input type="submit" name="save" value="save!">
 690 </form>
 691 """)
 692         lines = db.get_lines(start, end)
 693         if copy:
 694             start = end = 0
 695         return tmpl.render(action='add_free', start=start, end=end, lines=lines)
 696
 697     def add_structured(self, db, start=0, end=0, copy=False, temp_lines=[], add_empty_line=None):
 698         tmpl = jinja2.Template("""
 699 <form method="POST" action="{{action|e}}">
 700 <input type="submit" name="check" value="check" />
 701 <input type="submit" name="revert" value="revert" />
 702 <input type="submit" name="add_taxes" value="add taxes" />
 703 <input type="submit" name="add_taxes2" value="add taxes2" />
 704 <br />
 705 <input name="date" value="{{date|e}}" size=9 />
 706 <input name="description" value="{{desc|e}}" list="descriptions" />
 707 <textarea name="line_0_comment" rows=1 cols=20>{{head_comment|e}}</textarea>
 708 <input type="submit" name="line_0_add" value="[+]" />
 709 <br />
 710 {% for line in booking_lines %}
 711 <input name="line_{{line.i}}_account" value="{{line.acc|e}}" size=40 list="accounts" />
 712 <input type="number" name="line_{{line.i}}_amount" step=0.01 value="{{line.amt}}" size=10 />
 713 <input name="line_{{line.i}}_currency" value="{{line.curr|e}}" size=3 list="currencies" />
 714 <input type="submit" name="line_{{line.i}}_delete" value="[x]" />
 715 <input type="submit" name="line_{{line.i}}_delete_after" value="[XX]" />
 716 <input type="submit" name="line_{{line.i}}_add" value="[+]" />
 717 <textarea name="line_{{line.i}}_comment" rows=1 cols={% if line.comm_cols %}{{line.comm_cols}}{% else %}20{% endif %}>{{line.comment|e}}</textarea>
 718 <br />
 719 {% endfor %}
 720 {% for name, items in datalist_sets.items() %}
 721 <datalist id="{{name}}">
 722 {% for item in items %}
 723   <option value="{{item|e}}">{{item|e}}</option>
 724 {% endfor %}
 725 </datalist>
 726 {% endfor %}
 727 <input type="hidden" name="start" value={{start}} />
 728 <input type="hidden" name="end" value={{end}} />
 729 <input type="submit" name="save" value="save!">
 730 </form>
 731 """)
 732         import datetime
 733         lines = temp_lines if len(''.join(temp_lines)) > 0 else db.get_lines(start, end)
 734         bookings, comments = parse_lines(lines, validate_bookings=False)
 735         if len(bookings) > 1:
 736             raise HandledException('can only edit single Booking')
 737         if add_empty_line is not None:
 738             comments = comments[:add_empty_line+1] + [''] + comments[add_empty_line+1:]
 739             booking = bookings[0]
 740             booking.lines = booking.lines[:add_empty_line+1] + [''] + booking.lines[add_empty_line+1:]
 741         action = 'add_structured'
 742         datalist_sets = {'descriptions': set(), 'accounts': set(), 'currencies': set()}
 743         for b in db.bookings:
 744             datalist_sets['descriptions'].add(b.description)
 745             for account, moneys in b.account_changes.items():
 746                 datalist_sets['accounts'].add(account)
 747                 for currency in moneys.keys():
 748                     datalist_sets['currencies'].add(currency)
 749         content = ''
 750         today = str(datetime.datetime.now())[:10]
 751         booking_lines = []
 752         if copy:
 753             start = end = 0
 754         desc = head_comment = ''
 755         if len(bookings) == 0:
 756             for i in range(1, 3):
 757                 booking_lines += [{'i': i, 'acc': '', 'amt': '', 'curr': '', 'comment': ''}]
 758             date=today
 759         else:
 760             booking = bookings[0]
 761             desc = booking.description
 762             date = today if copy else booking.date_string
 763             head_comment=comments[0]
 764             last_line = len(comments)
 765             for i in range(1, len(comments)):
 766                 account = amount = currency = ''
 767                 if i < len(booking.lines) and booking.lines[i] != '':
 768                     account = booking.lines[i][0]
 769                     amount = booking.lines[i][1]
 770                     currency = booking.lines[i][2]
 771                 booking_lines += [{
 772                         'i': i,
 773                         'acc': account,
 774                         'amt': amount,
 775                         'curr': currency if currency else '',
 776                         'comment': comments[i],
 777                         'comm_cols': len(comments[i])}]
 778         content += tmpl.render(
 779                 action=action,
 780                 date=date,
 781                 desc=desc,
 782                 head_comment=head_comment,
 783                 booking_lines=booking_lines,
 784                 datalist_sets=datalist_sets,
 785                 start=start,
 786                 end=end)
 787         return content
 788
 789
 790 if __name__ == "__main__":
 791     webServer = HTTPServer((hostName, serverPort), MyServer)
 792     print(f"Server started http://{hostName}:{serverPort}")
 793     try:
 794         webServer.serve_forever()
 795     except KeyboardInterrupt:
 796         pass
 797     webServer.server_close()
 798     print("Server stopped.")