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

   1 import os
   2 import jinja2
   3 import decimal
   4 from datetime import datetime, timedelta
   5 from urllib.parse import parse_qs, urlparse
   6 from plomlib import PlomDB, PlomException, run_server, PlomHandler
   7
   8 server_port = 8082
   9 db_path = '/home/plom/org/ledger2023.dat'
  10
  11 html_head = """
  12 <style>
  13 body { color: #000000; }
  14 table { margin-bottom: 2em; }
  15 th, td { text-align: left }
  16 input[type=number] { text-align: right; font-family: monospace; }
  17 .money { font-family: monospace; text-align: right; }
  18 .comment { font-style: italic; color: #777777; }
  19 .meta { font-size: 0.75em; color: #777777; }
  20 .full_line_comment { display: block; white-space: nowrap; width: 0; }
  21 </style>
  22 <body>
  23 <a href="{{prefix}}/ledger">ledger</a>
  24 <a href="{{prefix}}/balance">balance</a>
  25 <a href="{{prefix}}/add_free">add free</a>
  26 <a href="{{prefix}}/add_structured">add structured</a>
  27 <hr />
  28 """
  29 booking_html = """
  30 <p id="{{nth}}"><a href="{{prefix}}#{{nth}}">{{date}}</a> {{desc}} <span class="comment">{{head_comment|e}}</span><br />
  31 <span class="meta">[edit: <a href="{{prefix}}/add_structured?start={{start}}&end={{end}}">structured</a>
  32 / <a href="{{prefix}}/add_free?start={{start}}&end={{end}}">free</a>
  33 | copy:<a href="{{prefix}}/copy_structured?start={{start}}&end={{end}}">structured</a>
  34 / <a href="{{prefix}}/copy_free?start={{start}}&end={{end}}">free</a>
  35 | move {% if move_up %}<a href="{{prefix}}/move_up?start={{start}}&end={{end}}">up</a>{% else %}up{% endif %}/{% if move_down %}<a href="{{prefix}}/move_down?start={{start}}&end={{end}}">down</a>{% else %}down{% endif %}
  36 | <a href="{{prefix}}/balance?stop={{nth+1}}">balance after</a>
  37 ]</span>
  38 <table>
  39 {% for l in booking_lines %}
  40 {% if l.acc %}
  41 <tr><td>{{l.acc|e}}</td><td class="money">{{l.money|e}}</td><td class="comment">{{l.comment|e}}</td></tr>
  42 {% else %}
  43 <tr><td><div class="comment full_line_comment">{{l.comment|e}}</div></td></tr>
  44 {% endif %}
  45 {% endfor %}
  46 </table></p>
  47 """
  48 add_form_header = """<form method="POST" action="{{action|e}}">
  49 <input type="submit" name="check" value="check" tabindex="5"  />
  50 <input type="submit" name="revert" value="revert" tabindex="5"  />
  51 """
  52 add_form_footer = """
  53 <input type="hidden" name="start" value={{start}} />
  54 <input type="hidden" name="end" value={{end}} />
  55 <input type="submit" name="save" value="save!" tabindex="5" >
  56 </form>
  57 """
  58 add_free_html = """<br />
  59 <textarea name="booking" rows=10 cols=80>
  60 {% for line in lines %}{{ line }}
  61 {% endfor %}
  62 </textarea>
  63 """
  64 add_structured_html = """
  65 <input type="submit" name="add_taxes" value="add taxes" tabindex="5" />
  66 <input type="submit" name="add_taxes2" value="add taxes2" tabindex="5"  />
  67 <input type="submit" name="add_sink" value="add sink" tabindex="5"  />
  68 <input name="replace_from" tabindex="5"  />
  69 <input type="submit" name="replace" value="-> replace ->" tabindex="5"  />
  70 <input name="replace_to" tabindex="5"  />
  71 <input type="submit" name="add_mirror" value="add mirror" tabindex="5"  />
  72 <br />
  73 <input name="date" value="{{date|e}}" size=9 tabindex="3"  />
  74 <input name="description" value="{{desc|e}}" list="descriptions" tabindex="3"  />
  75 <textarea name="line_0_comment" rows=1 cols=20 tabindex="3" >{{head_comment|e}}</textarea>
  76 <input type="submit" name="line_0_add" value="[+]" tabindex="5"  />
  77 <br />
  78 {% for line in booking_lines %}
  79 <input name="line_{{line.i}}_account" value="{{line.acc|e}}" size=40 list="accounts" tabindex="3" />
  80 <input type="number" name="line_{{line.i}}_amount" step=0.01 value="{{line.amt}}" size=10 tabindex="3" />
  81 <input name="line_{{line.i}}_currency" value="{{line.curr|e}}" size=3 list="currencies" tabindex="5" />
  82 <input type="submit" name="line_{{line.i}}_delete" value="[x]" tabindex="5" />
  83 <input type="submit" name="line_{{line.i}}_delete_after" value="[XX]" tabindex="5" />
  84 <input type="submit" name="line_{{line.i}}_add" value="[+]" tabindex="5" />
  85 <textarea name="line_{{line.i}}_comment" rows=1 cols={% if line.comm_cols %}{{line.comm_cols}}{% else %}20{% endif %} tabindex="3">{{line.comment|e}}</textarea>
  86 <br />
  87 {% endfor %}
  88 {% for name, items in datalist_sets.items() %}
  89 <datalist id="{{name}}">
  90 {% for item in items %}
  91   <option value="{{item|e}}">{{item|e}}</option>
  92 {% endfor %}
  93 </datalist>
  94 {% endfor %}
  95 """
  96
  97
  98 def apply_booking_to_account_balances(account_sums, account, currency, amount):
  99     if not account in account_sums:
 100         account_sums[account] = {currency: amount}
 101     elif not currency in account_sums[account].keys():
 102         account_sums[account][currency] = amount
 103     else:
 104         account_sums[account][currency] += amount
 105
 106
 107 def bookings_to_account_tree(bookings):
 108     account_sums = {}
 109     for booking in bookings:
 110         for account, changes in booking.account_changes.items():
 111             for currency, amount in changes.items():
 112                 apply_booking_to_account_balances(account_sums, account, currency, amount)
 113     account_tree = {}
 114     def collect_branches(account_name, path):
 115         node = account_tree
 116         path_copy = path[:]
 117         while len(path_copy) > 0:
 118             step = path_copy.pop(0)
 119             node = node[step]
 120         toks = account_name.split(":", maxsplit=1)
 121         parent = toks[0]
 122         if parent in node.keys():
 123             child = node[parent]
 124         else:
 125             child = {}
 126             node[parent] = child
 127         if len(toks) == 2:
 128             k, v = collect_branches(toks[1], path + [parent])
 129             if k not in child.keys():
 130                 child[k] = v
 131             else:
 132                 child[k].update(v)
 133         return parent, child
 134     for account_name in sorted(account_sums.keys()):
 135         k, v = collect_branches(account_name, [])
 136         if k not in account_tree.keys():
 137             account_tree[k] = v
 138         else:
 139             account_tree[k].update(v)
 140     def collect_totals(parent_path, tree_node):
 141         for k, v in tree_node.items():
 142             child_path = parent_path + ":" + k
 143             for currency, amount in collect_totals(child_path, v).items():
 144                 apply_booking_to_account_balances(account_sums, parent_path, currency, amount)
 145         return account_sums[parent_path]
 146     for account_name in account_tree.keys():
 147         account_sums[account_name] = collect_totals(account_name, account_tree[account_name])
 148     return account_tree, account_sums
 149
 150
 151 def parse_lines(lines, validate_bookings=True):
 152     inside_booking = False
 153     date_string, description = None, None
 154     booking_lines = []
 155     start_line = 0
 156     bookings = []
 157     comments = []
 158     lines = lines.copy() + [''] # to ensure a booking-ending last line
 159     last_date = ''
 160     for i, line in enumerate(lines):
 161         prefix = f"line {i}"
 162         # we start with the case of an utterly empty line
 163         comments += [""]
 164         stripped_line = line.rstrip()
 165         if stripped_line == '':
 166             if inside_booking:
 167                 # assume we finished a booking, finalize, and commit to DB
 168                 if len(booking_lines) < 2:
 169                     raise PlomException(f"{prefix} booking ends to early")
 170                 booking = Booking(date_string, description, booking_lines, start_line, validate_bookings)
 171                 bookings += [booking]
 172             # expect new booking to follow so re-zeroall booking data
 173             inside_booking = False
 174             date_string, description = None, None
 175             booking_lines = []
 176             continue
 177         # if non-empty line, first get comment if any, and commit to DB
 178         split_by_comment = stripped_line.split(sep=";", maxsplit=1)
 179         if len(split_by_comment) == 2:
 180             comments[i] = split_by_comment[1].lstrip()
 181         # 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
 182         non_comment = split_by_comment[0].rstrip()
 183         if non_comment.rstrip() == '':
 184              if inside_booking:
 185                  booking_lines += ['']
 186              continue
 187         # if we're starting a booking, parse by first-line pattern
 188         if not inside_booking:
 189             start_line = i
 190             toks = non_comment.split(maxsplit=1)
 191             date_string = toks[0]
 192             try:
 193                 datetime.strptime(date_string, '%Y-%m-%d')
 194             except ValueError:
 195                 raise PlomException(f"{prefix} bad date string: {date_string}")
 196             if last_date > date_string:
 197                 raise PlomException(f"{prefix} out-of-order-date")
 198             last_date = date_string
 199             try:
 200                 description = toks[1]
 201             except IndexError:
 202                 raise PlomException(f"{prefix} bad description: {description}")
 203             inside_booking = True
 204             booking_lines += [non_comment]
 205             continue
 206         # otherwise, read as transfer data
 207         toks = non_comment.split()  # ignore specification's allowance of single spaces in names
 208         if len(toks) > 3:
 209             raise PlomException(f"{prefix} too many booking line tokens: {toks}")
 210         amount, currency = None, None
 211         account_name = toks[0]
 212         if account_name[0] == '[' and account_name[-1] == ']':
 213             # ignore specification's differentiation of "virtual" accounts
 214             account_name = account_name[1:-1]
 215         decimal_chars = ".-0123456789"
 216         if len(toks) == 3:
 217             i_currency = 1
 218             try:
 219                 amount = decimal.Decimal(toks[1])
 220                 i_currency = 2
 221             except decimal.InvalidOperation:
 222                 try:
 223                     amount = decimal.Decimal(toks[2])
 224                 except decimal.InvalidOperation:
 225                     raise PlomException(f"{prefix} no decimal number in: {toks[1:]}")
 226             currency = toks[i_currency]
 227             if currency[0] in decimal_chars:
 228                 raise PlomException(f"{prefix} currency starts with int, dot, or minus: {currency}")
 229         elif len(toks) == 2:
 230             value = toks[1]
 231             inside_amount = False
 232             inside_currency = False
 233             amount_string = ""
 234             currency = ""
 235             dots_counted = 0
 236             for i, c in enumerate(value):
 237                 if i == 0:
 238                     if c in decimal_chars:
 239                         inside_amount = True
 240                     else:
 241                         inside_currency = True
 242                 if inside_currency:
 243                     if c in decimal_chars and len(amount_string) == 0:
 244                         inside_currency = False
 245                         inside_amount = True
 246                     else:
 247                         currency += c
 248                         continue
 249                 if inside_amount:
 250                     if c not in decimal_chars:
 251                         if len(currency) > 0:
 252                             raise PlomException(f"{prefix} amount has non-decimal chars: {value}")
 253                         inside_currency = True
 254                         inside_amount = False
 255                         currency += c
 256                         continue
 257                     if c == '-' and len(amount_string) > 1:
 258                         raise PlomException(f"{prefix} amount has non-start '-': {value}")
 259                     if c == '.':
 260                         if dots_counted > 1:
 261                             raise PlomException(f"{prefix} amount has multiple dots: {value}")
 262                         dots_counted += 1
 263                     amount_string += c
 264             if len(currency) == 0:
 265                 raise PlomException(f"{prefix} currency missing: {value}")
 266             if len(amount_string) > 0:
 267                 amount = decimal.Decimal(amount_string)
 268         booking_lines += [(account_name, amount, currency)]
 269     if inside_booking:
 270         raise PlomException(f"{prefix} last booking unfinished")
 271     return bookings, comments
 272
 273
 274 class Booking:
 275
 276     def __init__(self, date_string, description, booking_lines, start_line, process=True):
 277         self.date_string = date_string
 278         self.description = description
 279         self.lines = booking_lines
 280         self.start_line = start_line
 281         if process:
 282             self.validate_booking_lines()
 283             self.sink = {}
 284             self.account_changes = self.parse_booking_lines_to_account_changes()
 285
 286     def validate_booking_lines(self):
 287         prefix = f"booking at line {self.start_line}"
 288         sums = {}
 289         empty_values = 0
 290         for line in self.lines[1:]:
 291             if line == '':
 292                 continue
 293             _, amount, currency = line
 294             if amount is None:
 295                 if empty_values > 0:
 296                     raise PlomException(f"{prefix} relates more than one empty value of same currency {currency}")
 297                 empty_values += 1
 298                 continue
 299             if currency not in sums:
 300                 sums[currency] = 0
 301             sums[currency] += amount
 302         if empty_values == 0:
 303             for k, v in sums.items():
 304                 if v != 0:
 305                     raise PlomException(f"{prefix} does not add up to zero / {k} {v}")
 306         else:
 307             sinkable = False
 308             for k, v in sums.items():
 309                 if v != 0:
 310                     sinkable = True
 311             if not sinkable:
 312                 raise PlomException(f"{prefix} has empty value that cannot be filled")
 313
 314     def parse_booking_lines_to_account_changes(self):
 315         account_changes = {}
 316         debt = {}
 317         sink_account = None
 318         for line in self.lines[1:]:
 319             if line == '':
 320                 continue
 321             account, amount, currency = line
 322             if amount is None:
 323                 sink_account = account
 324                 continue
 325             apply_booking_to_account_balances(account_changes, account, currency, amount)
 326             if currency not in debt:
 327                 debt[currency] = amount
 328             else:
 329                 debt[currency] += amount
 330         if sink_account:
 331             for currency, amount in debt.items():
 332                 apply_booking_to_account_balances(account_changes, sink_account, currency, -amount)
 333                 self.sink[currency] = -amount
 334         return account_changes
 335
 336
 337
 338 class LedgerDB(PlomDB):
 339
 340     def __init__(self, prefix):
 341         self.prefix = prefix
 342         self.bookings = []
 343         self.comments = []
 344         self.real_lines = []
 345         super().__init__(db_path)
 346         ret = parse_lines(self.real_lines)
 347         self.bookings += ret[0]
 348         self.comments += ret[1]
 349
 350     def read_db_file(self, f):
 351         self.real_lines += [l.rstrip() for l in f.readlines()]
 352
 353     def get_lines(self, start, end):
 354         return self.real_lines[start:end]
 355
 356     def write_db(self, text, mode='w'):
 357         if text[-1] != '\n':
 358             text += '\n'
 359         self.write_text_to_db(text)
 360
 361     def insert_at_date(self, lines, date):
 362         start_at = 0
 363         if len(self.bookings) > 0:
 364             if date >= self.bookings[-1].date_string:
 365                 start_at = len(self.real_lines)
 366                 lines = [''] + lines
 367             else:
 368                 for b in self.bookings:
 369                     if b.date_string == date:
 370                         start_at = b.start_line
 371                     elif b.date_string > date:
 372                         start_at = b.start_line
 373                         break
 374         return self.write_lines_in_total_lines_at(self.real_lines, start_at, lines)
 375
 376     def update(self, start, end, lines, date):
 377         total_lines = self.real_lines[:start] + self.real_lines[end:]
 378         n_original_lines = end - start
 379         start_at = len(total_lines)
 380         for b in self.bookings:
 381             if b.date_string == date:
 382                 if start_at == len(total_lines) or b.start_line == start:
 383                     start_at = b.start_line
 384                     if b.start_line > start:
 385                         start_at -= n_original_lines
 386             elif b.date_string > date:
 387                 break
 388         if start_at == len(total_lines):
 389             lines = [''] + lines
 390         return self.write_lines_in_total_lines_at(total_lines, start_at, lines)
 391
 392     def write_lines_in_total_lines_at(self, total_lines, start_at, lines):
 393         total_lines = total_lines[:start_at] + lines + [''] + total_lines[start_at:]
 394         _, _ = parse_lines(lines)
 395         text = '\n'.join(total_lines)
 396         self.write_db(text)
 397         return start_at
 398
 399     def get_nth_for_booking_of_start_line(self, start_line):
 400         nth = 0
 401         for b in self.bookings:
 402             if b.start_line >= start_line:
 403                 break
 404             nth += 1
 405         return nth
 406
 407     def add_taxes(self, lines, finish=False):
 408         ret = []
 409         bookings, _ = parse_lines(lines)
 410         date = bookings[0].date_string
 411         acc_kk_add = 'Reserves:KrankenkassenBeitragsWachstum'
 412         acc_kk_minimum = 'Reserves:Month:KrankenkassenDefaultBeitrag'
 413         acc_kk = 'Expenses:KrankenKasse'
 414         acc_est = 'Reserves:Einkommenssteuer'
 415         acc_assets = 'Assets'
 416         acc_buffer = 'Reserves:NeuAnfangsPuffer:Ausgaben'
 417         last_monthbreak_assets = 0
 418         last_monthbreak_est = 0
 419         last_monthbreak_kk_minimum = 0
 420         last_monthbreak_kk_add = 0
 421         buffer_expenses = 0
 422         kk_expenses = 0
 423         est_expenses = 0
 424         months_passed = -int(finish)
 425         for b in self.bookings:
 426             if date == b.date_string:
 427                 break
 428             acc_keys = b.account_changes.keys()
 429             if acc_buffer in acc_keys:
 430                 buffer_expenses -= b.account_changes[acc_buffer]['€']
 431             if acc_kk_add in acc_keys:
 432                 kk_expenses += b.account_changes[acc_kk_add]['€']
 433             if acc_kk in acc_keys:
 434                 kk_expenses += b.account_changes[acc_kk]['€']
 435             if acc_est in acc_keys:
 436                 est_expenses += b.account_changes[acc_est]['€']
 437             if acc_kk_add in acc_keys and acc_kk_minimum in acc_keys:
 438                 months_passed += 1
 439                 if finish:
 440                     last_monthbreak_kk_add = b.account_changes[acc_kk_add]['€']
 441                     last_monthbreak_est = b.account_changes[acc_est]['€']
 442                     last_monthbreak_kk_minimum = b.account_changes[acc_kk_minimum]['€']
 443                     last_monthbreak_assets = b.account_changes[acc_buffer]['€']
 444         old_needed_income_before_anything = - last_monthbreak_assets - last_monthbreak_kk_add - last_monthbreak_kk_minimum - last_monthbreak_est
 445         if finish:
 446             ret += [f'  {acc_est}  {-last_monthbreak_est}€ ; for old assumption of needed income: {old_needed_income_before_anything}€']
 447         _, account_sums = bookings_to_account_tree(bookings)
 448         expenses_so_far = -1 * account_sums[acc_assets]['€'] + old_needed_income_before_anything
 449         needed_income_before_kk = expenses_so_far
 450         ESt_this_month = 0
 451         left_over = needed_income_before_kk - ESt_this_month
 452         too_low = 0
 453         too_high = 2 * needed_income_before_kk
 454         E0 = decimal.Decimal(10908)
 455         E1 = decimal.Decimal(15999)
 456         E2 = decimal.Decimal(62809)
 457         E3 = decimal.Decimal(277825)
 458         while True:
 459             zvE = buffer_expenses - kk_expenses + (12 - months_passed) * needed_income_before_kk
 460             if finish:
 461                 zvE += last_monthbreak_assets + last_monthbreak_kk_add + last_monthbreak_kk_minimum
 462             if zvE < E0:
 463                 ESt = decimal.Decimal(0)
 464             elif zvE < E1:
 465                 y = (zvE - E0)/10000
 466                 ESt = (decimal.Decimal(979.18) * y + 1400) * y
 467             elif zvE < E2:
 468                 y = (zvE - E1)/10000
 469                 ESt = (decimal.Decimal(192.59) * y + 2397) * y + decimal.Decimal(966.53)
 470             elif zvE < E3:
 471                 ESt = decimal.Decimal(0.42) * (zvE - decimal.Decimal(62809))  + decimal.Decimal(16405.54)
 472             else:
 473                 ESt = decimal.Decimal(0.45) * (zvE - decimal.Decimal(277825)) + decimal.Decimal(106713.52)
 474             ESt_this_month = (ESt + last_monthbreak_est - est_expenses) / (12 - months_passed)
 475             left_over = needed_income_before_kk - ESt_this_month
 476             if abs(left_over - expenses_so_far) < 0.001:
 477                 break
 478             elif left_over < expenses_so_far:
 479                 too_low = needed_income_before_kk
 480             elif left_over > expenses_so_far:
 481                 too_high = needed_income_before_kk
 482             needed_income_before_kk = too_low + (too_high - too_low)/2
 483         ESt_this_month = ESt_this_month.quantize(decimal.Decimal('0.00'))
 484         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}€']
 485         kk_minimum_income = 1131.67
 486         if date < '2023-02-01':
 487             kk_minimum_income = decimal.Decimal(1096.67)
 488             kk_factor = decimal.Decimal(0.189)
 489             kk_minimum_tax = decimal.Decimal(207.27).quantize(decimal.Decimal('0.00'))
 490         elif date < '2023-08-01':
 491             kk_factor = decimal.Decimal(0.191)
 492             kk_minimum_tax = decimal.Decimal(216.15).quantize(decimal.Decimal('0.00'))
 493         else:
 494             kk_factor = decimal.Decimal(0.197)
 495             kk_minimum_tax = decimal.Decimal(222.94).quantize(decimal.Decimal('0.00'))
 496         kk_add_so_far = account_sums[acc_kk_add]['€'] if acc_kk_add in account_sums.keys() else 0
 497         kk_add = needed_income_before_kk / (1 - kk_factor) - needed_income_before_kk - kk_minimum_tax
 498         hit_kk_minimum_income_limit = False
 499         if kk_add_so_far + kk_add < 0:
 500             hit_kk_minimum_income_limit = True
 501             kk_add_uncorrect = kk_add
 502             kk_add = -(kk_add + kk_add_so_far)
 503         kk_add = decimal.Decimal(kk_add).quantize(decimal.Decimal('0.00'))
 504         if finish:
 505             ret += [f'  {acc_kk_add}  {-last_monthbreak_kk_add}€  ; for old assumption of needed income']
 506         else:
 507             ret += [f'  {acc_kk_minimum}  {kk_minimum_tax}€  ; assumed minimum income {kk_minimum_income:.2f}€ * {kk_factor:.3f}']
 508         if hit_kk_minimum_income_limit:
 509             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']
 510         else:
 511             ret += [f'  {acc_kk_add}  {kk_add}€  ; {needed_income_before_kk:.2f}€ / (1 - {kk_factor:.3f}) - {needed_income_before_kk:.2f}€ - {kk_minimum_tax}€']
 512         diff = - last_monthbreak_est + ESt_this_month - last_monthbreak_kk_add + kk_add
 513         if not finish:
 514             diff += kk_minimum_tax
 515         final_minus = expenses_so_far - old_needed_income_before_anything + diff
 516         ret += [f'  {acc_assets}  {-diff} €']
 517         ret += [f'  {acc_assets}  {final_minus} €']
 518         year_needed = buffer_expenses + final_minus + (12 - months_passed - 1) * final_minus
 519         if finish:
 520             ret += [f'  {acc_buffer}  {-final_minus} €']
 521         else:
 522             ret += [f'  {acc_buffer}  {-final_minus} € ; assume as to earn in year: {acc_buffer} + {12 - months_passed - 1} * this = {year_needed}']
 523         return ret
 524
 525     def add_mirror(self, lines):
 526         ret = []
 527         bookings, _ = parse_lines(lines)
 528         booking = bookings[0]
 529         for line in booking.lines[1:]:
 530             ret += [f'?  {-line[1]} {line[2]}']
 531         return ret
 532
 533     def ledger_as_html(self):
 534         booking_tmpl = jinja2.Template(booking_html)
 535         single_c_tmpl = jinja2.Template('<span class="comment">{{c|e}}</span><br />')  ##
 536         elements_to_write = []
 537         last_i = i = 0  ##
 538         for nth, booking in enumerate(self.bookings):
 539             move_up = nth > 0 and self.bookings[nth - 1].date_string == booking.date_string
 540             move_down = nth < len(self.bookings) - 1 and self.bookings[nth + 1].date_string == booking.date_string
 541             booking_end = last_i = booking.start_line + len(booking.lines)
 542             booking_lines = []
 543             i = booking.start_line  ##
 544             elements_to_write += [single_c_tmpl.render(c=c) for c in self.comments[last_i:i] if c != '']  ##
 545             for booking_line in booking.lines[1:]:
 546                  i += 1  ##
 547                  comment = self.comments[i]  ##
 548                  if booking_line == '':
 549                      booking_lines += [{'acc': None, 'money': None, 'comment': comment}]  ##
 550                      continue
 551                  account = booking_line[0]
 552                  money = ''
 553                  if booking_line[1] is not None:
 554                      money = f'{booking_line[1]} {booking_line[2]}'
 555                  booking_lines += [{'acc': booking_line[0], 'money':money, 'comment':comment}]  ##
 556             elements_to_write += [booking_tmpl.render(
 557                 prefix=self.prefix,
 558                 nth=nth,
 559                 start=booking.start_line,
 560                 end=booking_end,
 561                 date=booking.date_string,
 562                 desc=booking.description,
 563                 head_comment=self.comments[booking.start_line],
 564                 move_up=move_up,
 565                 move_down=move_down,
 566                 booking_lines = booking_lines)]
 567         elements_to_write += [single_c_tmpl.render(c=c) for c in self.comments[last_i:] if c != '']  #
 568         return '\n'.join(elements_to_write)
 569
 570     def balance_as_html(self, until=None):
 571         bookings = self.bookings[:until if until is None else int(until)]
 572         lines = []
 573         account_tree, account_sums = bookings_to_account_tree(bookings)
 574         def print_subtree(lines, indent, node, subtree, path):
 575             line = f"{indent}{node}"
 576             n_tabs = 5 - (len(line) // 8)
 577             line += n_tabs * "\t"
 578             if "€" in account_sums[path + node].keys():
 579                 amount = account_sums[path + node]["€"]
 580                 line += f"{amount:9.2f} €\t"
 581             else:
 582                 line += f"\t\t"
 583             for currency, amount in account_sums[path + node].items():
 584                 if currency != '€' and amount > 0:
 585                     line += f"{amount:5.2f} {currency}\t"
 586             lines += [line]
 587             indent += "  "
 588             for k, v in sorted(subtree.items()):
 589                 print_subtree(lines, indent, k, v, path + node + ":")
 590         for k, v in sorted(account_tree.items()):
 591             print_subtree(lines, "", k, v, "")
 592         content = "\n".join(lines)
 593         return f"<pre>{content}</pre>"
 594
 595     def add_free(self, start=0, end=0, copy=False):
 596         tmpl = jinja2.Template(add_form_header + add_free_html + add_form_footer)
 597         lines = self.get_lines(start, end)
 598         if copy:
 599             start = end = 0
 600         return tmpl.render(action=self.prefix + '/add_free', start=start, end=end, lines=lines)
 601
 602     def add_structured(self, start=0, end=0, copy=False, temp_lines=[], add_empty_line=None):
 603         tmpl = jinja2.Template(add_form_header + add_structured_html + add_form_footer)
 604         lines = temp_lines if len(''.join(temp_lines)) > 0 else self.get_lines(start, end)
 605         bookings, comments = parse_lines(lines, validate_bookings=False)
 606         if len(bookings) > 1:
 607             raise PlomException('can only structurally edit single Booking')
 608         if add_empty_line is not None:
 609             comments = comments[:add_empty_line+1] + [''] + comments[add_empty_line+1:]
 610             booking = bookings[0]
 611             booking.lines = booking.lines[:add_empty_line+1] + [''] + booking.lines[add_empty_line+1:]
 612         action = self.prefix + '/add_structured'
 613         datalist_sets = {'descriptions': set(), 'accounts': set(), 'currencies': set()}
 614         for b in self.bookings:
 615             datalist_sets['descriptions'].add(b.description)
 616             for account, moneys in b.account_changes.items():
 617                 datalist_sets['accounts'].add(account)
 618                 for currency in moneys.keys():
 619                     datalist_sets['currencies'].add(currency)
 620         content = ''
 621         today = str(datetime.now())[:10]
 622         booking_lines = []
 623         if copy:
 624             start = end = 0
 625         desc = head_comment = ''
 626         if len(bookings) == 0:
 627             date=today
 628         else:
 629             booking = bookings[0]
 630             desc = booking.description
 631             date = today if copy else booking.date_string
 632             head_comment=comments[0]
 633             for i in range(1, len(comments)):
 634                 account = amount = currency = ''
 635                 if i < len(booking.lines) and booking.lines[i] != '':
 636                     account = booking.lines[i][0]
 637                     amount = booking.lines[i][1]
 638                     currency = booking.lines[i][2]
 639                 booking_lines += [{
 640                         'i': i,
 641                         'acc': account,
 642                         'amt': amount,
 643                         'curr': currency if currency else '€',
 644                         'comment': comments[i],
 645                         'comm_cols': len(comments[i])}]
 646         for i in range(len(comments), len(comments) + 8):
 647             booking_lines += [{'i': i, 'acc': '', 'amt': '', 'curr': '€', 'comment': ''}]
 648         content += tmpl.render(
 649                 action=action,
 650                 date=date,
 651                 desc=desc,
 652                 head_comment=head_comment,
 653                 booking_lines=booking_lines,
 654                 datalist_sets=datalist_sets,
 655                 start=start,
 656                 end=end)
 657         return content
 658
 659     def move_up(self, start, end):
 660         prev_booking = None
 661         for redir_nth, b in enumerate(self.bookings):
 662             if b.start_line >= start:
 663                 break
 664             prev_booking = b
 665         start_at = prev_booking.start_line
 666         self.make_move(start, end, start_at)
 667         return redir_nth - 1
 668
 669     def move_down(self, start, end):
 670         next_booking = None
 671         for redir_nth, b in enumerate(self.bookings):
 672             if b.start_line > start:
 673                 next_booking = b
 674                 break
 675         start_at = next_booking.start_line + len(next_booking.lines) - (end - start) + 1
 676         self.make_move(start, end, start_at-1)
 677         return redir_nth
 678
 679     def make_move(self, start, end, start_at):
 680         lines = self.get_lines(start, end)
 681         total_lines = self.real_lines[:start-1] + self.real_lines[end:]  # +1 because we reduce the original position's two empty border lines to in-between line
 682         self.write_lines_in_total_lines_at(total_lines, start_at, lines)
 683
 684     def booking_lines_from_postvars(self, postvars):
 685         add_empty_line = None
 686         date = postvars['date'][0]
 687         description = postvars['description'][0]
 688         start_comment = postvars['line_0_comment'][0]
 689         start_line = f'{date} {description}'
 690         if start_comment.rstrip() != '':
 691             start_line += f' ; {start_comment}'
 692         lines = [start_line]
 693         if 'line_0_add' in postvars.keys():
 694             add_empty_line = 0
 695         i = j = 1
 696         while f'line_{i}_comment' in postvars.keys():
 697             if f'line_{i}_delete' in postvars.keys():
 698                 i += 1
 699                 continue
 700             elif f'line_{i}_delete_after' in postvars.keys():
 701                 break
 702             elif f'line_{i}_add' in postvars.keys():
 703                 add_empty_line = j
 704             account = postvars[f'line_{i}_account'][0]
 705             amount = postvars[f'line_{i}_amount'][0]
 706             currency = postvars[f'line_{i}_currency'][0]
 707             comment = postvars[f'line_{i}_comment'][0]
 708             i += 1
 709             new_main = f'  {account}  {amount}'
 710             if '' == new_main.rstrip() == comment.rstrip():  # don't write empty lines, ignore currency if nothing else set
 711                 continue
 712             if len(amount.rstrip()) > 0:
 713                 new_main += f' {currency}'
 714             j += 1
 715             new_line = new_main
 716             if comment.rstrip() != '':
 717                 new_line += f'  ; {comment}'
 718             lines += [new_line]
 719         if 'add_sink' in postvars.keys():
 720             temp_lines = lines.copy() + ['_']
 721             try:
 722                 temp_bookings, _ = parse_lines(temp_lines)
 723                 for currency in temp_bookings[0].sink:
 724                     amount = temp_bookings[0].sink[currency]
 725                     lines += [f'Assets  {amount:.2f} {currency}']
 726             except PlomException:
 727                 pass
 728         elif 'add_taxes' in postvars.keys():
 729             lines += self.add_taxes(lines, finish=False)
 730         elif 'add_taxes2' in postvars.keys():
 731             lines += self.add_taxes(lines, finish=True)
 732         elif 'replace' in postvars.keys():
 733             for i, line in enumerate(lines):
 734                 lines[i] = line.replace(postvars['replace_from'][0], postvars['replace_to'][0])
 735         elif 'add_mirror' in postvars.keys():
 736             lines += self.add_mirror(lines)
 737         return lines, add_empty_line
 738
 739
 740
 741 class LedgerHandler(PlomHandler):
 742
 743     def app_init(self, handler):
 744         default_path = '/ledger'
 745         handler.add_route('GET', default_path, self.forward_gets)
 746         handler.add_route('POST', default_path, self.forward_posts)
 747         return 'ledger', default_path
 748
 749     def do_POST(self):
 750         self.try_do(self.forward_posts)
 751
 752     def forward_posts(self):
 753         prefix = self.apps['ledger'] if hasattr(self, 'apps') else ''
 754         parsed_url = urlparse(self.path)
 755         length = int(self.headers['content-length'])
 756         postvars = parse_qs(self.rfile.read(length).decode(), keep_blank_values=1)
 757         start = int(postvars['start'][0])
 758         end = int(postvars['end'][0])
 759         db = LedgerDB(prefix)
 760         add_empty_line = None
 761         lines = []
 762         # get inputs
 763         if prefix + '/add_structured' == parsed_url.path and not 'revert' in postvars.keys():
 764             lines, add_empty_line = db.booking_lines_from_postvars(postvars)
 765         elif prefix + '/add_free' == parsed_url.path and not 'revert' in postvars.keys():
 766             lines = postvars['booking'][0].splitlines()
 767         # validate where appropriate
 768         if ('save' in postvars.keys()) or ('check' in postvars.keys()):
 769             _, _ = parse_lines(lines)
 770         # if saving, process where to and where to redirect after
 771         if 'save' in postvars.keys():
 772             last_date = str(datetime.now())[:10]
 773             if len(db.bookings) > 0:
 774                 last_date = db.bookings[-1].date_string
 775             target_date = last_date[:]
 776             first_line_tokens = lines[0].split() if len(lines) > 0 else ''
 777             first_token = first_line_tokens[0] if len(first_line_tokens) > 0 else ''
 778             try:
 779                 datetime.strptime(first_token, '%Y-%m-%d')
 780                 target_date = first_token
 781             except ValueError:
 782                  pass
 783             if start == end == 0:
 784                 start = db.insert_at_date(lines, target_date)
 785                 nth = db.get_nth_for_booking_of_start_line(start)
 786             else:
 787                 new_start = db.update(start, end, lines, target_date)
 788                 nth = db.get_nth_for_booking_of_start_line(new_start)
 789                 if new_start > start:
 790                     nth -= 1
 791             self.redirect(prefix + f'/#{nth}')
 792         # otherwise just re-build editing form
 793         else:
 794             if prefix + '/add_structured' == parsed_url.path:
 795                 edit_content = db.add_structured(start, end, temp_lines=lines, add_empty_line=add_empty_line)
 796             else:
 797                 edit_content = db.add_free(start, end)
 798             header = jinja2.Template(html_head).render(prefix=prefix)
 799             self.send_HTML(header + edit_content)
 800
 801     def do_GET(self):
 802         self.try_do(self.forward_gets)
 803
 804     def forward_gets(self):
 805         prefix = self.apps['ledger'] if hasattr(self, 'apps') else ''
 806         parsed_url = urlparse(self.path)
 807         params = parse_qs(parsed_url.query)
 808         start = int(params.get('start', ['0'])[0])
 809         end = int(params.get('end', ['0'])[0])
 810         db = LedgerDB(prefix=prefix)
 811         if parsed_url.path == prefix + '/balance':
 812             stop = params.get('stop', [None])[0]
 813             page = db.balance_as_html(stop)
 814         elif parsed_url.path == prefix + '/add_free':
 815             page = db.add_free(start, end)
 816         elif parsed_url.path == prefix + '/add_structured':
 817             page = db.add_structured(start, end)
 818         elif parsed_url.path == prefix + '/copy_free':
 819             page = db.add_free(start, end, copy=True)
 820         elif parsed_url.path == prefix + '/copy_structured':
 821             page = db.add_structured(start, end, copy=True)
 822         elif parsed_url.path == prefix + '/move_up':
 823             nth = db.move_up(start, end)
 824             self.redirect(prefix + f'/#{nth}')
 825             return
 826         elif parsed_url.path == prefix + '/move_down':
 827             nth = db.move_down(start, end)
 828             self.redirect(prefix + f'/#{nth}')
 829             return
 830         else:
 831             page = db.ledger_as_html()
 832         header = jinja2.Template(html_head).render(prefix=prefix)
 833         self.send_HTML(header + page)
 834
 835
 836
 837 if __name__ == "__main__":
 838     run_server(server_port, LedgerHandler)