feat: get_available_cash now takes as input settlement_fund_balance

different institutions seem to compute this in different ways.
overridable method now includes settlement_fund_balance for use if
needed in importers

beancount_reds_importers/importers/fidelity/__init__.py

@@ -27,3 +27,6 @@ def get_target_acct_custom(self, transaction, ticker=None):
         if transaction.memo.startswith("FEES"):
             return self.config['fees']
         return None
+
+    def get_available_cash(self, settlement_fund_balance=0):
+        return getattr(self.ofx_account.statement, 'available_cash', None)

beancount_reds_importers/libreader/csv_multitable_reader.py

@@ -94,5 +94,5 @@ def get_balance_positions(self):
         # TODO
         raise "Not supported"
 
-    def get_available_cash(self):
+    def get_available_cash(self, settlement_fund_balance=0):
         return None

beancount_reds_importers/libreader/csvreader.py

@@ -190,7 +190,7 @@ def get_transactions(self):
                 continue
             yield ot
 
-    def get_available_cash(self):
+    def get_available_cash(self, settlement_fund_balance=0):
         return None
 
     # TOOD: custom, overridable

beancount_reds_importers/libreader/ofxreader.py

@@ -60,8 +60,13 @@ def get_balance_positions(self):
             return []
         yield from self.ofx_account.statement.positions
 
-    def get_available_cash(self):
-        return getattr(self.ofx_account.statement, 'available_cash', None)
+    def get_available_cash(self, settlement_fund_balance=0):
+        available_cash = getattr(self.ofx_account.statement, 'available_cash', None)
+        if available_cash is not None:
+            # Some institutions compute available_cash this way. For others, override this method
+            # in the importer
+            return available_cash - settlement_fund_balance
+        return None
 
     def get_max_transaction_date(self):
         try:

beancount_reds_importers/libreader/reader.py

@@ -41,5 +41,5 @@ def get_balance_statement(self, file=None):
     def get_balance_positions(self):
         return []
 
-    def get_available_cash(self):
+    def get_available_cash(self, settlement_fund_balance=0):
         return None

beancount_reds_importers/libtransactionbuilder/investments.py

@@ -375,15 +375,14 @@ def extract_balances_and_prices(self, file, counter):
                 new_entries.append(price_entry)
 
         # ----------------- available cash
-        available_cash = self.get_available_cash()
+        available_cash = self.get_available_cash(settlement_fund_balance)
         if available_cash is not None:
-            balance = available_cash - settlement_fund_balance
             metadata = data.new_metadata(file.name, next(counter))
             metadata.update(self.build_metadata(file, metatype='balance_cash'))
             try:
                 bal_date = date if date else self.file_date(file).date()  # unavailable file_date raises AttributeError
                 balance_entry = data.Balance(metadata, bal_date, self.config['cash_account'],
-                                             amount.Amount(balance, self.currency),
+                                             amount.Amount(available_cash, self.currency),
                                              None, None)
                 new_entries.append(balance_entry)
             except AttributeError: