Initial income_calculator project

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/parsers/bank_t.py

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+import re
+from datetime import datetime
+from pathlib import Path
+from typing import List
+
+import pdfplumber
+
+from backend.parsers.base import BaseBankParser, ParsedTransaction
+
+
+def _normalize_amount(s: str) -> float:
+    return float(s.replace("\u00a0", " ").replace(" ", "").replace(",", "."))
+
+
+def _parse_date(d: str) -> str:
+    """DD.MM.YYYY -> YYYY-MM-DD"""
+    try:
+        dt = datetime.strptime(d.strip(), "%d.%m.%Y")
+        return dt.strftime("%Y-%m-%d")
+    except ValueError:
+        return d.strip()
+
+
+def _parse_datetime(d: str, time_str: str) -> str:
+    """Date DD.MM.YYYY + time HH:MM -> ISO"""
+    try:
+        part = d.strip() + " " + (time_str or "00:00").strip()
+        dt = datetime.strptime(part, "%d.%m.%Y %H:%M")
+        return dt.strftime("%Y-%m-%dT%H:%M:%S")
+    except ValueError:
+        return _parse_date(d) + "T00:00:00"
+
+
+class BankTParser(BaseBankParser):
+    """Парсер выписок Т-банка. Файлы Т-MM-YY.pdf."""
+
+    # Первая строка операции: дата дата сумма ₽ сумма ₽ описание 4цифры (сумма может быть + или -)
+    ROW_RE = re.compile(
+        r"^(\d{2}\.\d{2}\.\d{4})\s+(\d{2}\.\d{2}\.\d{4})\s+([-+]?[\d\s,]+\.\d{2})\s*₽\s+([-+]?[\d\s,]+\.\d{2})\s*₽\s+(.+?)\s+(\d{4})\s*$",
+        re.UNICODE,
+    )
+    # Вторая строка (время): HH:MM HH:MM остаток текста
+    TIME_RE = re.compile(r"^(\d{1,2}:\d{2})\s+(\d{1,2}:\d{2})\s*(.*)$")
+
+    def can_parse(self, filename: str) -> bool:
+        name = Path(filename).name
+        return name.startswith("Т-") and name.lower().endswith(".pdf")
+
+    def parse(self, file_path: str) -> List[ParsedTransaction]:
+        result: List[ParsedTransaction] = []
+        with pdfplumber.open(file_path) as pdf:
+            lines: List[str] = []
+            for page in pdf.pages:
+                text = page.extract_text()
+                if text:
+                    lines.extend(text.split("\n"))
+
+        i = 0
+        while i < len(lines):
+            line = lines[i]
+            m = self.ROW_RE.match(line.strip())
+            if m:
+                date_op, date_debit, amt_op, amt_card, desc, card_tail = m.groups()
+                op_time, debit_time = "00:00", "00:00"
+                if i + 1 < len(lines):
+                    tm = self.TIME_RE.match(lines[i + 1].strip())
+                    if tm:
+                        op_time, debit_time, rest = tm.groups()
+                        if rest:
+                            desc = (desc + " " + rest).strip()
+                        i += 1
+
+                amount = _normalize_amount(amt_op)
+                amount_card = _normalize_amount(amt_card) if amt_card else None
+                result.append(
+                    ParsedTransaction(
+                        operation_date=_parse_datetime(date_op, op_time),
+                        debit_date=_parse_datetime(date_debit, debit_time),
+                        amount=amount,
+                        amount_card_currency=amount_card,
+                        description=(desc or "").strip(),
+                        card_tail=card_tail,
+                    )
+                )
+            i += 1
+        return result