#14: stored function for "credit" transfer transactions

brmbar3/brmbar/Shop.py

@@ -87,12 +87,11 @@ class Shop:
         return cost
 
     def add_credit(self, credit, user):
-        trn = self.db.execute_and_fetch(
+        self.db.execute_and_fetch(
             "SELECT public.add_credit(%s,  %s, %s, %s)",
             [self.cash.id, credit, user.id, user.name]
-        )[0]
+        )
         self.db.commit()
-        return trn # unused
 
         #transaction = self._transaction(responsible = user, description = "BrmBar credit replenishment for " + user.name)
         #self.cash.debit(transaction, credit, user.name)
@@ -100,20 +99,24 @@ class Shop:
         #self.db.commit()
 
     def withdraw_credit(self, credit, user):
-        trn = self.db.execute_and_fetch(
+        self.db.execute_and_fetch(
             "SELECT public.withdraw_credit(%s,  %s, %s, %s)",
             [self.cash.id, credit, user.id, user.name]
-        )[0]
+        )
         self.db.commit()
-        return trn # unused
         #transaction = self._transaction(responsible = user, description = "BrmBar credit withdrawal for " + user.name)
         #self.cash.credit(transaction, credit, user.name)
         #user.debit(transaction, credit, "Credit withdrawal")
         #self.db.commit()
 
     def transfer_credit(self, userfrom, userto, amount):
-        self.add_credit(amount, userto)
-        self.withdraw_credit(amount, userfrom)
+        self.db.execute_and_fetch(
+            "SELECT public.transfer_credit(%s,  %s, %s, %s)",
+            [self.cash.id, credit, user.id, user.name]
+        )
+        self.db.commit()
+        #self.add_credit(amount, userto)
+        #self.withdraw_credit(amount, userfrom)
 
     def buy_for_cash(self, item, amount = 1):
         # Buy: Currency conversion from item currency to shop currency

brmbar3/schema/0014-shop-transfer-credit.sql

@@ -0,0 +1,58 @@
+--
+-- 0014-shop-transfer-credit.sql
+--
+-- #14 - stored function for "credit" transfer transactions
+--
+-- ISC License
+--
+-- Copyright 2023-2025 Brmlab, z.s.
+-- TMA <tma+hs@jikos.cz>
+--
+-- Permission to use, copy, modify, and/or distribute this software
+-- for any purpose with or without fee is hereby granted, provided
+-- that the above copyright notice and this permission notice appear
+-- in all copies.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+-- WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+-- WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+-- AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+-- CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+-- OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+-- NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+
+-- To require fully-qualified names
+SELECT pg_catalog.set_config('search_path', '', false);
+
+DO $upgrade_block$
+BEGIN
+
+IF brmbar_privileged.has_exact_schema_version(12) THEN
+
+CREATE OR REPLACE FUNCTION public.transfer_credit(
+	i_cash_account_id public.accounts.id%TYPE,
+	i_credit NUMERIC,
+	i_userfrom_id public.accounts.id%TYPE,
+	i_userfrom_name TEXT,
+	i_userto_id public.accounts.id%TYPE,
+	i_userto_name TEXT
+) RETURNS VOID
+LANGUAGE plpgsql
+AS $$
+BEGIN
+	PERFORM public.add_credit(i_cash_account_id, i_credit, i_userto_id, i_userto_name);
+	PERFORM public.withdraw_credit(i_cash_account_id, i_credit, i_userfrom_id, i_userfrom_name);
+END;
+$$;
+
+
+
+PERFORM brmbar_privileged.upgrade_schema_version_to(13);
+END IF;
+
+END;
+$upgrade_block$;
+
+-- vim: set ft=plsql :