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