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