add TransactionType.REVERSAL to denote rejected transactions

Author: codereverser

casparser/enums.py

@@ -32,3 +32,4 @@ class TransactionType(Enum):
     SEGREGATION = auto()
     MISC = auto()
     UNKNOWN = auto()
+    REVERSAL = auto()

casparser/process/cas_detailed.py

@@ -56,7 +56,9 @@ def get_transaction_type(
         else:
             txn_type = TransactionType.PURCHASE
     elif units < 0:
-        if "switch" in description:
+        if re.search("reversal|rejection|dishonoured", description, re.I):
+            txn_type = TransactionType.REVERSAL
+        elif "switch" in description:
             if "merger" in description:
                 txn_type = TransactionType.SWITCH_OUT_MERGER
             else:

tests/test_process.py

@@ -55,6 +55,10 @@ def test_transaction_type(self):
             None,
         )
 
+        assert get_transaction_type(
+            "Purchase SIPCheque Dishonoured - Instalment No 108", Decimal(-1.0)
+        ) == (TransactionType.REVERSAL, None)
+
     def test_isin_search(self):
         isin, amfi = isin_search(
             "Axis Long Term Equity Fund - Direct Growth", "KFINTECH", "128TSDGG"