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Improve ledger.py
[misc] / ledger.py
index a1b31eb9f9c4d56739340aa8658721b9eb61368d..ee6ed807ef72b4a9601acf32d25fad6ec1e0757a 100755 (executable)
--- a/ledger.py
+++ b/ledger.py
@@ -2,6 +2,8 @@ from http.server import BaseHTTPRequestHandler, HTTPServer
 import sys
 import os
 import html
+import jinja2 
+import decimal
 from urllib.parse import parse_qs, urlparse
 hostName = "localhost"
 serverPort = 8082
@@ -26,8 +28,7 @@ def apply_booking_to_account_balances(account_sums, account, currency, amount):
 
 
 def add_taxes(lines):
-    import decimal
-    bookings, _ = parse_lines(lines.copy())
+    bookings, _ = parse_lines(lines)
     _, account_sums = bookings_to_account_tree(bookings)
     expenses_so_far = -1 * account_sums['Assets']['€']
     needed_income_before_krankenkasse = expenses_so_far
@@ -35,10 +36,10 @@ def add_taxes(lines):
     left_over = needed_income_before_krankenkasse - ESt_this_month
     too_low = 0
     too_high = 2 * needed_income_before_krankenkasse 
-    E0 = 10908
-    E1 = 15999 
-    E2 = 62809 
-    E3 = 277825 
+    E0 = decimal.Decimal(10908)
+    E1 = decimal.Decimal(15999)
+    E2 = decimal.Decimal(62809) 
+    E3 = decimal.Decimal(277825) 
     while True:
         zvE = 12 * needed_income_before_krankenkasse
         if zvE < E0:
@@ -55,27 +56,29 @@ def add_taxes(lines):
             ESt = decimal.Decimal(0.45) * (zvE - decimal.Decimal(277825)) + decimal.Decimal(106713.52) 
         ESt_this_month = ESt / 12
         left_over = needed_income_before_krankenkasse - ESt_this_month
-        if abs(left_over - expenses_so_far) < 0.1:
+        if abs(left_over - expenses_so_far) < 0.001:
             break
         elif left_over < expenses_so_far:
             too_low = needed_income_before_krankenkasse
         elif left_over > expenses_so_far:
             too_high = needed_income_before_krankenkasse
         needed_income_before_krankenkasse = too_low + (too_high - too_low)/2
-    line_income_tax = f'  Reserves:Einkommenssteuer  {ESt_this_month:.2f}€ ; expenses so far: {expenses_so_far:.2f}€; zvE: {zvE:.2f}€; ESt total: {ESt:.2f}€; needed before Krankenkasse: {needed_income_before_krankenkasse:.2f}€'
-    kk_minimum_income = 1096.67 
+    ESt_this_month = ESt_this_month.quantize(decimal.Decimal('0.00'))
+    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}€'
+    kk_minimum_income = decimal.Decimal(1096.67) 
     kk_factor = decimal.Decimal(0.189) 
-    kk_minimum_tax = decimal.Decimal(207.27)
+    kk_minimum_tax = decimal.Decimal(207.27).quantize(decimal.Decimal('0.00'))
     # kk_minimum_income = 1131.67 
     # kk_factor = decimal.Decimal(0.191) 
     # kk_minimum_tax = decimal.Decimal(216.15)
     # kk_factor = decimal.Decimal(0.197) 
     # kk_minimum_tax = decimal.Decimal(222.94)
     kk_add = max(0, kk_factor * needed_income_before_krankenkasse - kk_minimum_tax)
-    line_kk_minimum = f'  Reserves:Month:Krankenkassendefaultbeitrag  {kk_minimum_tax:.2f}€  ; assed minimum income {kk_minimum_income:.2f}€ * {kk_factor:.3f}'
-    line_kk_add = f'  Reserves:Month:Krankenkassenbeitragswachstum {kk_add:.2f}€  ; max(0, {kk_factor:.3f} * {needed_income_before_krankenkasse:.2f}€ - {kk_minimum_tax:.2f}€)'
+    kk_add = decimal.Decimal(kk_add).quantize(decimal.Decimal('0.00'))
+    line_kk_minimum = f'  Reserves:Month:Krankenkassendefaultbeitrag  {kk_minimum_tax}€  ; assumed minimum income {kk_minimum_income:.2f}€ * {kk_factor:.3f}'
+    line_kk_add = f'  Reserves:Month:Krankenkassenbeitragswachstum {kk_add}€  ; max(0, {kk_factor:.3f} * {needed_income_before_krankenkasse:.2f}€ - {kk_minimum_tax}€)'
     final_minus = expenses_so_far + ESt_this_month + kk_minimum_tax + kk_add 
-    line_finish = f'  Assets  -{final_minus:.2f}€'
+    line_finish = f'  Assets  -{ESt_this_month + kk_minimum_tax + kk_add} € ; -{final_minus}€'
     return [line_income_tax, line_kk_minimum, line_kk_add, line_finish]
 
 
@@ -125,14 +128,13 @@ def bookings_to_account_tree(bookings):
 
 def parse_lines(lines):
     import datetime
-    import decimal
     inside_booking = False
     date_string, description = None, None
     booking_lines = []
     start_line = 0
     bookings = []
     comments = []
-    lines += [''] # to ensure a booking-ending last line
+    lines = lines.copy() + [''] # to ensure a booking-ending last line
     for i, line in enumerate(lines):
         prefix = f"line {i}"
         # we start with the case of an utterly empty line
@@ -244,6 +246,7 @@ def parse_lines(lines):
         raise HandledException(f"{prefix} last booking unfinished")
     return bookings, comments
 
+
 class Booking:
 
     def __init__(self, date_string, description, booking_lines, start_line):
@@ -252,6 +255,7 @@ class Booking:
         self.lines = booking_lines
         self.start_line = start_line
         self.validate_booking_lines()
+        self.sink = {}
         self.account_changes = self.parse_booking_lines_to_account_changes()
 
     def validate_booking_lines(self):
@@ -273,7 +277,7 @@ class Booking:
         if empty_values == 0:
             for k, v in sums.items():
                 if v != 0:
-                    raise HandledException(f"{prefix} does not sum up to zero")
+                    raise HandledException(f"{prefix} does not add up to zero")
         else:
             sinkable = False
             for k, v in sums.items():
@@ -301,6 +305,7 @@ class Booking:
         if sink_account:
             for currency, amount in debt.items():
                 apply_booking_to_account_balances(account_changes, sink_account, currency, -amount)
+                self.sink[currency] = -amount
         return account_changes
 
 
@@ -316,7 +321,7 @@ class Database:
         self.real_lines = []
         if os.path.exists(self.db_file):
             with open(self.db_file, "r") as f:
-                self.real_lines += f.readlines()
+                self.real_lines += [l.rstrip() for l in f.readlines()]
         ret = parse_lines(self.real_lines)
         self.bookings += ret[0]
         self.comments += ret[1]
@@ -332,7 +337,8 @@ class Database:
             shutil.copy(self.db_file, self.db_file + ".bak")
         f = open(self.lock_file, 'w+')
         f.close()
-        text = ''.join(self.real_lines[:start]) + '\n'.join(lines) + ''.join(self.real_lines[end:])
+        total_lines = self.real_lines[:start] + lines + self.real_lines[end:]
+        text = '\n'.join(total_lines)
         with open(self.db_file, 'w') as f:
             f.write(text);
         os.remove(self.lock_file)
@@ -346,7 +352,7 @@ class Database:
         f = open(self.lock_file, 'w+')
         f.close()
         with open(self.db_file, 'a') as f:
-            f.write('\n' + '\n'.join(lines) + '\n');
+            f.write('\n\n' + '\n'.join(lines) + '\n\n');
         os.remove(self.lock_file)
 
 
@@ -357,6 +363,7 @@ class MyServer(BaseHTTPRequestHandler):
 body { color: #000000; }
 table { margin-bottom: 2em; }
 th, td { text-align: left }
+input[type=number] { text-align: right; font-family: monospace; }
 .money { font-family: monospace; text-align: right; }
 .comment { font-style: italic; color: #777777; }
 .full_line_comment { display: block; white-space: nowrap; width: 0; }
@@ -375,13 +382,22 @@ th, td { text-align: left }
         length = int(self.headers['content-length'])
         postvars = parse_qs(self.rfile.read(length).decode(), keep_blank_values=1)
         parsed_url = urlparse(self.path)
-        if '/add_structured' == parsed_url.path:
+        lines = []
+        add_empty_line = None 
+        if '/add_structured' == parsed_url.path and not 'revert' in postvars.keys():
             date = postvars['date'][0]
             description = postvars['description'][0]
             start_comment = postvars['line_0_comment'][0]
             lines = [f'{date} {description} ; {start_comment}']
-            i = 1
+            if 'line_0_add' in postvars.keys():
+                add_empty_line = 0
+            i = j = 1
             while f'line_{i}_comment' in postvars.keys():
+                if f'line_{i}_delete' in postvars.keys():
+                    i += 1
+                    continue
+                if f'line_{i}_add' in postvars.keys():
+                    add_empty_line = j
                 account = postvars[f'line_{i}_account'][0]
                 amount = postvars[f'line_{i}_amount'][0]
                 currency = postvars[f'line_{i}_currency'][0]
@@ -390,11 +406,12 @@ th, td { text-align: left }
                 new_main = f'{account} {amount} {currency}'
                 if '' == new_main.rstrip() == comment.rstrip():  # don't write empty lines
                     continue
+                j += 1
                 new_line = new_main
                 if comment.rstrip() != '':
                     new_line += f' ; {comment}'
                 lines += [new_line]
-            if 'add_income_tax' in postvars.keys():
+            if 'add_taxes' in postvars.keys():
                 lines += add_taxes(lines)
         elif '/add_free' == parsed_url.path:
             lines = postvars['booking'][0].splitlines()
@@ -402,18 +419,25 @@ th, td { text-align: left }
         end = int(postvars['end'][0])
         try:
             _, _ = parse_lines(lines)
-            if start == end == 0:
-                db.append(lines)
+            if 'save' in postvars.keys():
+                if start == end == 0:
+                    db.append(lines)
+                    redir_url = f'/#last'
+                else:
+                    db.replace(start, end, lines)
+                    redir_url = f'/#{start}'
+                self.send_response(301)
+                self.send_header('Location', redir_url)
+                self.end_headers()
             else:
-                db.replace(start, end, lines)
-            self.send_response(301)
-            redir_url = '/'
-            if 'add_income_tax' in postvars.keys():
-                redir_url = f'/add_structured?start={start}&end={start+len(lines)-1}'
-            self.send_header('Location', redir_url)
-            self.end_headers()
+                page = self.header + self.add_structured(db, start, end, temp_lines=lines, add_empty_line=add_empty_line) + self.footer
+                self.send_response(200)
+                self.send_header("Content-type", "text/html")
+                self.end_headers()
+                self.wfile.write(bytes(page, "utf-8"))
         except HandledException as e:
             self.send_response(400)
+            self.send_header("Content-type", "text/html")
             self.end_headers()
             page = f'{self.header}ERROR: {e}{self.footer}'
             self.wfile.write(bytes(page, "utf-8"))
@@ -428,7 +452,6 @@ th, td { text-align: left }
         params = parse_qs(parsed_url.query)
         start = int(params.get('start', ['0'])[0])
         end = int(params.get('end', ['0'])[0])
-        bonus_lines = int(params.get('bonus_lines', ['0'])[0])
         if parsed_url.path == '/balance':
             page += self.balance_as_html(db)
         elif parsed_url.path == '/add_free':
@@ -439,6 +462,8 @@ th, td { text-align: left }
             page += self.add_free(db, start, end, copy=True)
         elif parsed_url.path == '/copy_structured':
             page += self.add_structured(db, start, end, copy=True)
+        elif parsed_url.path == '/ledger2':
+            page += self.ledger2_as_html(db)
         else:
             page += self.ledger_as_html(db)
         page += self.footer
@@ -468,125 +493,223 @@ th, td { text-align: left }
         content = "\n".join(lines)
         return f"<pre>{content}</pre>"
 
-    # def ledger_as_html(self, db):
-    #     lines = []
-    #     line_sep = '<br />'
-    #     for comment in db.comments:
-    #         line = f' ; {comment}' if comment != '' else ''
-    #         lines += [line + line_sep]
-    #     for booking in db.bookings:
-    #         i = booking.start_line
-    #         suffix = lines[i]
-    #         lines[i] = f'<p>{booking.date_string} {booking.description}{suffix}'
-    #         for booking_line in booking.lines[1:]:
-    #             i += 1
-    #             if booking_line == '':
-    #                 continue
-    #             suffix = f' {lines[i]}' if len(lines[i]) > 0 else ''
-    #             value = f' {booking_line[1]} {booking_line[2]}' if booking_line[1] else ''
-    #             lines[i] = f'{booking_line[0]}{value}{suffix}'
-    #         lines[i] = lines[i][:-len(line_sep)] + f"""</p>
-# edit :
-# <a h ref="/add_structured?start={booking.start_line}&end={i+1}">structured</a>
-# / <a  href="/add_free?start={booking.start_line}&end={i+1}">free</a>
-# | co py:
-# <a h ref="/copy_structured?start={booking.start_line}&end={i+1}">structured</a>
-# / <a  href="/copy_free?start={booking.start_line}&end={i+1}">free</a>
-# <br  />"""
-#          return '\n'.join(lines)
+    def ledger2_as_html(self, db):
+        single_c_tmpl = jinja2.Template('<span class="comment">{{c|e}}</span><br />')
+        booking_tmpl = jinja2.Template("""
+<p id="{{start}}"><a href="#{{start}}">{{date}}</a> {{desc}} <span class="comment">{{head_comment|e}}</span>
+[edit: <a href="/add_structured?start={{start}}&end={{end}}">structured</a> 
+/ <a href="/add_free?start={{start}}&end={{end}}">free</a> 
+| copy:<a href="/copy_structured?start={{start}}&end={{end}}">structured</a>
+/ <a href="/copy_free?start={{start}}&end={{end}}">free</a>]
+<table>
+{% for l in booking_lines %}
+<tr><td>{{l.acc|e}}</td><td class="money">{{l.money|e}}</td><td class="money">{{l.balance|e}}</td></tr>
+{% endfor %}
+</table></p>
+""")
+        elements_to_write = []
+        account_sums = {}
+        for booking in db.bookings:
+            i = booking.start_line
+            booking_end = booking.start_line + len(booking.lines)
+            booking_lines = []
+            for booking_line in booking.lines[1:]:
+                if booking_line == '':
+                    continue
+                account = booking_line[0] 
+                account_toks = account.split(':') 
+                path = ''
+                for tok in account_toks:
+                    path += tok
+                    if not path in account_sums.keys():
+                        account_sums[path] = {}
+                    path += ':' 
+                moneys = []
+                money = ''
+                if booking_line[1] is not None:
+                    moneys += [(booking_line[1], booking_line[2])]
+                    money = f'{moneys[0][0]} {moneys[0][1]}'
+                else:
+                    for currency, amount in booking.sink.items():
+                        moneys += {(amount, currency)} 
+                    money = '['
+                    for m in moneys:
+                        money += f'{m[0]} {m[1]} '
+                    money += ']'
+                balance = ''
+                for amount, currency in moneys:
+                    path = ''
+                    for tok in account_toks:
+                        path += tok
+                        if not currency in account_sums[path].keys():
+                            account_sums[path][currency] = 0
+                        account_sums[path][currency] += amount 
+                        path += ':' 
+                    balance += f'{account_sums[account][currency]} {currency}' 
+                booking_lines += [{'acc': booking_line[0], 'money':money, 'balance':balance}] 
+            elements_to_write += [booking_tmpl.render(
+                start=booking.start_line,
+                end=booking_end,
+                date=booking.date_string,
+                desc=booking.description,
+                head_comment=db.comments[booking.start_line],
+                booking_lines = booking_lines)]
+        return '\n'.join(elements_to_write) 
 
     def ledger_as_html(self, db):
-        lines = []
-        for comment in db.comments:
-            lines += [f'<span class="comment">{comment}</span>' if comment != '' else '']
+        single_c_tmpl = jinja2.Template('<span class="comment">{{c|e}}</span><br />')
+        booking_tmpl = jinja2.Template("""
+<p id="{{start}}"><a {% if last %}id="last"{% endif %} href="#{{start}}">{{date}}</a> {{desc}} <span class="comment">{{head_comment|e}}</span>
+[edit: <a href="/add_structured?start={{start}}&end={{end}}">structured</a> 
+/ <a href="/add_free?start={{start}}&end={{end}}">free</a> 
+| copy:<a href="/copy_structured?start={{start}}&end={{end}}">structured</a>
+/ <a href="/copy_free?start={{start}}&end={{end}}">free</a>]
+<table>
+{% for l in booking_lines %}
+{% if l.acc %}
+<tr><td>{{l.acc|e}}</td><td class="money">{{l.money|e}}</td><td class="comment">{{l.comment|e}}</td></tr>
+{% else %}
+<tr><td><div class="comment full_line_comment">{{l.comment|e}}</div></td></tr>
+{% endif %}
+{% endfor %}
+</table></p>
+""")
+        elements_to_write = []
+        last_i = i = 0
+        last_start = db.bookings[-1].start_line
         for booking in db.bookings:
             i = booking.start_line
-            booking_end = booking.start_line + len(booking.lines)
-            lines[i] = f"""{booking.date_string} {booking.description} {lines[i]}
-[edit: <a href="/add_structured?start={booking.start_line}&end={booking_end}">structured</a> 
-/ <a href="/add_free?start={booking.start_line}&end={booking_end}">free</a> 
-| copy:<a href="/copy_structured?start={booking.start_line}&end={booking_end}">structured</a>
-/ <a href="/copy_free?start={booking.start_line}&end={booking_end}">free</a>]
-<table>"""
+            elements_to_write += [single_c_tmpl.render(c=c) for c in db.comments[last_i:i] if c != '']
+            booking_end = last_i = booking.start_line + len(booking.lines)
+            booking_lines = []
             for booking_line in booking.lines[1:]:
                 i += 1
+                comment = db.comments[i] 
                 if booking_line == '':
-                    lines[i] = f'<tr><td><div class="full_line_comment">{lines[i]}</div></td></tr>'
+                    booking_lines += [{'acc': None, 'money': None, 'comment': comment}]
                     continue
-                comment = f' {lines[i]}' if len(lines[i]) > 0 else ''
+                account = booking_line[0] 
                 money = ''
-                if booking_line[1]:
+                if booking_line[1] is not None:
                     money = f'{booking_line[1]} {booking_line[2]}'
-                account = booking_line[0] 
-                lines[i] = f'<tr><td>{booking_line[0]}</td><td class="money">{money}</td><td>{comment}</td></tr>'
-            lines[i] = lines[i] + "\n" + '</table>'
-        return '\n'.join(lines)
-
-    def header_add_form(self, action):
-        return f"<form method=\"POST\" action=\"/{action}\">\n"
+                booking_lines += [{'acc': booking_line[0], 'money':money, 'comment':comment}] 
+            elements_to_write += [booking_tmpl.render(
+                last=booking.start_line == last_start,
+                start=booking.start_line,
+                end=booking_end,
+                date=booking.date_string,
+                desc=booking.description,
+                head_comment=db.comments[booking.start_line],
+                booking_lines = booking_lines)]
+        elements_to_write += [single_c_tmpl.render(c=c) for c in db.comments[last_i:] if c != '']
+        return '\n'.join(elements_to_write) 
 
-    def footer_add_form(self, start, end, copy):
+    def add_free(self, db, start=0, end=0, copy=False):
+        tmpl = jinja2.Template("""
+<form method="POST" action="{{action|e}}">
+<textarea name="booking" rows=10 cols=80>
+{% for line in lines %}{{ line }}
+{% endfor %}
+</textarea>
+<input type="hidden" name="start" value={{start}} />
+<input type="hidden" name="end" value={{end}} />
+<input type="submit" name="save" value="save!">
+</form>
+""")
+        lines = db.get_lines(start, end)
         if copy:
             start = end = 0
-        return f"""
-<input type="hidden" name="start" value={start} />
-<input type="hidden" name="end" value={end} />
-<input type="submit" name="default">
-</form>"""
-
-    def add_free(self, db, start=0, end=0, copy=False):
-        content = html.escape(''.join(db.get_lines(start, end)))
-        return f'{self.header_add_form("add_free")}<textarea name="booking" rows="8" cols="80">{content}</textarea>{self.footer_add_form(start, end, copy)}'
-
-    def add_structured(self, db, start=0, end=0, bonus_lines=10, copy=False):
+        return tmpl.render(action='add_free', start=start, end=end, lines=lines) 
+
+    def add_structured(self, db, start=0, end=0, copy=False, temp_lines=[], add_empty_line=None):
+        tmpl = jinja2.Template("""
+<form method="POST" action="{{action|e}}">
+<input type="submit" name="check" value="check" />
+<input type="submit" name="revert" value="revert" />
+<input type="submit" name="add_taxes" value="add taxes" />
+<br />
+<input name="date" value="{{date|e}}" size=9 />
+<input name="description" value="{{desc|e}}" list="descriptions" />
+<textarea name="line_0_comment" rows=1 cols=20>{{head_comment|e}}</textarea>
+<input type="submit" name="line_0_add" value="[+]" />
+<br />
+{% for line in booking_lines %}
+<input name="line_{{line.i}}_account" value="{{line.acc|e}}" size=40 list="accounts" />
+<input type="number" name="line_{{line.i}}_amount" step=0.01 value="{{line.amt}}" size=10 />
+<input name="line_{{line.i}}_currency" value="{{line.curr|e}}" size=3 list="currencies" />
+<textarea name="line_{{line.i}}_comment" rows=1 cols={% if line.comm_cols %}{{line.comm_cols}}{% else %}20{% endif %}>{{line.comment|e}}</textarea>
+<input type="submit" name="line_{{line.i}}_delete" value="[x]" />
+<input type="submit" name="line_{{line.i}}_add" value="[+]" />
+<br />
+{% endfor %}
+{% for name, items in datalist_sets.items() %}
+<datalist id="{{name}}">
+{% for item in items %}
+  <option value="{{item|e}}">{{item|e}}</option>
+{% endfor %}
+</datalist>
+{% endfor %}
+<input type="hidden" name="start" value={{start}} />
+<input type="hidden" name="end" value={{end}} />
+<input type="submit" name="save" value="save!">
+</form>
+""")
         import datetime
-        lines = db.get_lines(start, end)
+        lines = temp_lines if len(''.join(temp_lines)) > 0 else db.get_lines(start, end)
         bookings, comments = parse_lines(lines)
         if len(bookings) > 1:
             raise HandledException('can only edit single Booking')
-        last_line = 0
-        def inpu(name, val="", datalist="", input_type='text'):
-            val = val if val is not None else ""
-            safe_val = html.escape(str(val))
-            datalist_string = '' if datalist == '' else f'list="{datalist}"'
-            return f'<input type="{input_type}" name="{name}" value="{safe_val}" {datalist_string}/>'
-        input_lines = inpu('add_income_tax', 'add income tax', '', 'submit') + '<br />'
+        if add_empty_line is not None:
+            comments = comments[:add_empty_line+1] + [''] + comments[add_empty_line+1:]
+            booking = bookings[0]
+            booking.lines = booking.lines[:add_empty_line+1] + [''] + booking.lines[add_empty_line+1:] 
+        action = 'add_structured'
+        datalist_sets = {'descriptions': set(), 'accounts': set(), 'currencies': set()}
+        for b in db.bookings:
+            datalist_sets['descriptions'].add(b.description)
+            for account, moneys in b.account_changes.items():
+                datalist_sets['accounts'].add(account)
+                for currency in moneys.keys():
+                    datalist_sets['currencies'].add(currency)
+        content = ''
         today = str(datetime.datetime.now())[:10]
+        booking_lines = []
+        if copy:
+            start = end = 0
+        desc = head_comment = ''
         if len(bookings) == 0:
-            input_lines += f'{inpu("date", today)} {inpu("description", "", "descriptions")} ; {inpu("line_0_comment")}<br />'
-            last_line = 1
+            for i in range(1, 3):
+                booking_lines += [{'i': i, 'acc': '', 'amt': '', 'curr': '', 'comment': ''}]
+            date=today 
         else:
             booking = bookings[0]
+            desc = booking.description
+            date = today if copy else booking.date_string
+            head_comment=comments[0]
             last_line = len(comments)
-            date_string = today if copy else booking.date_string
-            input_lines += f'{inpu("date", date_string)} {inpu("description", booking.description, "descriptions")} ; {inpu("line_0_comment", comments[0])}<br />'
             for i in range(1, len(comments)):
                 account = amount = currency = ''
                 if i < len(booking.lines) and booking.lines[i] != '':
                     account = booking.lines[i][0]
                     amount = booking.lines[i][1]
                     currency = booking.lines[i][2]
-                input_lines += f'{inpu(f"line_{i}_account", account, "accounts")} {inpu(f"line_{i}_amount", amount)} {inpu(f"line_{i}_currency", currency, "currencies")} ; {inpu(f"line_{i}_comment", comments[i])}<br />'
-        for j in range(bonus_lines):
-            i = j + last_line
-            input_lines += f'{inpu(f"line_{i}_account", "", "accounts")} {inpu(f"line_{i}_amount", "", "amounts")} {inpu(f"line_{i}_currency", "", "currencies")} ; {inpu(f"line_{i}_comment")}<br />'
-        datalist_sets = {'descriptions': set(), 'accounts': set(), 'currencies': set()}
-        for b in db.bookings:
-            datalist_sets['descriptions'].add(b.description)
-            for account, moneys in b.account_changes.items():
-                datalist_sets['accounts'].add(account)
-                for currency in moneys.keys():
-                    datalist_sets['currencies'].add(currency)
-        def build_datalist(name):
-            datalist = f'<datalist id="{name}">' + "\n"
-            for item in datalist_sets[name]:
-                safe_item = html.escape(item)
-                datalist += f'<option value="{safe_item}">{safe_item}</option>' + "\n"
-            return f"{datalist}</datalist>\n"
-        datalists = build_datalist('descriptions')
-        datalists += build_datalist('accounts')
-        datalists += build_datalist('currencies')
-        return f'{self.header_add_form("add_structured")}{input_lines}{datalists}{self.footer_add_form(start, end, copy)}'
+                booking_lines += [{
+                        'i': i, 
+                        'acc': account,
+                        'amt': amount, 
+                        'curr': currency if currency else '',
+                        'comment': comments[i],
+                        'comm_cols': len(comments[i])}]
+        content += tmpl.render(
+                action=action, 
+                date=date,
+                desc=desc,
+                head_comment=head_comment, 
+                booking_lines=booking_lines,
+                datalist_sets=datalist_sets,
+                start=start,
+                end=end) 
+        return content 
 
 
 if __name__ == "__main__":