0026: maintain trading accounts for each currency

brmbar3/schema/0026-trading-accounts-2.sql

@@ -0,0 +1,86 @@
+--
+-- 0026-trading-accounts-2.sql
+--
+-- #26 - maintain trading accounts for each currency
+--
+-- 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 $upgrade_block$
+DECLARE
+    v INTEGER;
+BEGIN
+
+IF brmbar_privileged.has_exact_schema_version(25) THEN
+
+
+-- enforce uniqueness of trading accounts
+CREATE UNIQUE INDEX uniq_trading_currency
+    ON public.accounts (currency)
+    WHERE acctype = 'trading';
+
+-- create trading accounts for existing currencies
+DO $$ 
+DECLARE
+    v_rec RECORD;
+    v_trading INTEGER;
+BEGIN
+    -- Loop through all currencies
+    FOR v_rec IN SELECT id, name FROM public.currencies LOOP
+        SELECT public.create_account(
+                'Trading account: ' || v_rec.name,
+                v_rec.id,
+                'trading'
+                ) INTO v_trading;
+    END LOOP;
+END $$;
+
+
+CREATE OR REPLACE FUNCTION public.create_currency(
+        IN i_name public.currencies.name%TYPE
+) RETURNS INTEGER LANGUAGE plpgsql AS $$
+DECLARE
+    r_id INTEGER;
+    v_trading INTEGER;
+BEGIN
+    -- First the currency
+    INSERT INTO public.currencies (name)
+        VALUES (i_name) RETURNING id INTO r_id;
+    -- Then the 'trading' account
+    SELECT public.create_account(
+            'Trading account: ' || i_name,
+            r_id,
+            'trading'
+            ) INTO v_trading;
+    RETURN r_id;
+END
+$$;
+
+
+PERFORM brmbar_privileged.upgrade_schema_version_to(26);
+END IF;
+
+END;
+$upgrade_block$;
+
+-- vim: set ft=plsql sw=4 ts=4 et :