Add source info and sort transactions

src/toldg/process.py

@@ -3,7 +3,6 @@ import datetime
 import logging
 import re
 import sys
-from typing import Any, Dict, List
 
 import toldg.models
 import toldg.predict
@@ -19,7 +18,7 @@ def process_ldg_files(config: Config):
                 f_out.write(f_in.read())
 
 
-def get_csv_config(csv_file: str, csv_configs: List[CsvConfig]) -> CsvConfig:
+def get_csv_config(csv_file: str, csv_configs: list[CsvConfig]) -> CsvConfig:
     cs = [c for c in csv_configs if re.match(c.file_match_regex, csv_file)]
     if not cs:
         logging.critical(f"No CSV config for {csv_file}.")
@@ -30,7 +29,7 @@ def get_csv_config(csv_file: str, csv_configs: List[CsvConfig]) -> CsvConfig:
     return cs[0]
 
 
-def get_transactions(csv_file: str, config: CsvConfig) -> List[Transaction]:
+def get_transactions(csv_file: str, config: CsvConfig) -> list[Transaction]:
     def date_to_date(date: str) -> str:
         d = datetime.datetime.strptime(date, config.input_date_format)
         return d.strftime(config.output_date_format)
@@ -38,7 +37,7 @@ def get_transactions(csv_file: str, config: CsvConfig) -> List[Transaction]:
     def flip_sign(amount: str) -> str:
         return amount[1:] if amount.startswith("-") else "-" + amount
 
-    def row_to_transaction(row, fields):
+    def row_to_transaction(idx, row, fields):
         """The user can configure the mapping of CSV fields to the three
         required fields date, amount and description via the CsvConfig."""
         t = {field: row[index] for index, field in fields}
@@ -52,7 +51,8 @@ def get_transactions(csv_file: str, config: CsvConfig) -> List[Transaction]:
             account2=toldg.models.UNKNOWN_CATEGORY,
             description=t["description"],
             csv_file=csv_file,
-            row=csv_file + ", " + ", ".join(row),
+            row=", ".join(row),
+            index=idx,
         )
 
     fields = [(i, f) for i, f in enumerate(config.fields) if f]
@@ -60,15 +60,17 @@ def get_transactions(csv_file: str, config: CsvConfig) -> List[Transaction]:
         reader = csv.reader(f, delimiter=config.delimiter, quotechar=config.quotechar)
         for _ in range(config.skip):
             next(reader)
-        transactions = [row_to_transaction(row, fields) for row in reader if row]
+        rows = [row for row in reader if row]
+    transactions = [row_to_transaction(i, row, fields)
+                    for i, row in enumerate(reversed(rows))]
     return transactions
 
 
-def apply_mappings(transactions: List[Transaction], mappings: Dict[str, Mapping]):
+def apply_mappings(transactions: list[Transaction], mappings: dict[str, Mapping]):
     """Apply mappings to transactions."""
     for t in transactions:
-        if t.row in mappings:
-            mapping = mappings[t.row]
+        if t.key() in mappings:
+            mapping = mappings[t.key()]
             assert isinstance(mapping, Mapping)
             assert (
                 mapping.count > 0
@@ -82,7 +84,7 @@ def apply_mappings(transactions: List[Transaction], mappings: Dict[str, Mapping]
         assert mapping.count == 0, f"{mapping} was not used as often as expected!"
 
 
-def process_csv_files(config: Config) -> List[Transaction]:
+def process_csv_files(config: Config) -> list[Transaction]:
     csv_files = toldg.utils.get_csv_files(config.input_directory)
     transactions = []
     for csv_file in csv_files: