init

scripts/db/020_audit_trail.sql

@@ -0,0 +1,65 @@
+CREATE TABLE IF NOT EXISTS audit_log (
+    id bigserial PRIMARY KEY,
+    table_name text NOT NULL,
+    op text NOT NULL,
+    pk jsonb,
+    old_data jsonb,
+    new_data jsonb,
+    actor_id bigint,
+    ip text,
+    ua text,
+    changed_at timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_audit_log_table_time ON audit_log (table_name, changed_at DESC);
+
+CREATE OR REPLACE FUNCTION audit_row_change()
+RETURNS trigger
+LANGUAGE plpgsql
+AS $$
+DECLARE
+    v_actor_id bigint;
+    v_ip text;
+    v_ua text;
+    v_pk jsonb;
+BEGIN
+    v_actor_id := NULLIF(current_setting('app.current_user_id', true), '')::bigint;
+    v_ip := NULLIF(current_setting('app.current_ip', true), '');
+    v_ua := NULLIF(current_setting('app.current_ua', true), '');
+
+    IF TG_OP = 'INSERT' THEN
+        v_pk := jsonb_build_object('id', NEW.id);
+        INSERT INTO audit_log(table_name, op, pk, old_data, new_data, actor_id, ip, ua)
+        VALUES (TG_TABLE_NAME, TG_OP, v_pk, NULL, to_jsonb(NEW), v_actor_id, v_ip, v_ua);
+        RETURN NEW;
+    ELSIF TG_OP = 'UPDATE' THEN
+        v_pk := jsonb_build_object('id', NEW.id);
+        INSERT INTO audit_log(table_name, op, pk, old_data, new_data, actor_id, ip, ua)
+        VALUES (TG_TABLE_NAME, TG_OP, v_pk, to_jsonb(OLD), to_jsonb(NEW), v_actor_id, v_ip, v_ua);
+        RETURN NEW;
+    ELSE
+        v_pk := jsonb_build_object('id', OLD.id);
+        INSERT INTO audit_log(table_name, op, pk, old_data, new_data, actor_id, ip, ua)
+        VALUES (TG_TABLE_NAME, TG_OP, v_pk, to_jsonb(OLD), NULL, v_actor_id, v_ip, v_ua);
+        RETURN OLD;
+    END IF;
+END;
+$$;
+
+DROP TRIGGER IF EXISTS audit_sales_orders ON sales_orders;
+CREATE TRIGGER audit_sales_orders
+AFTER INSERT OR UPDATE OR DELETE ON sales_orders
+FOR EACH ROW
+EXECUTE FUNCTION audit_row_change();
+
+DROP TRIGGER IF EXISTS audit_purchase_orders ON purchase_orders;
+CREATE TRIGGER audit_purchase_orders
+AFTER INSERT OR UPDATE OR DELETE ON purchase_orders
+FOR EACH ROW
+EXECUTE FUNCTION audit_row_change();
+
+DROP TRIGGER IF EXISTS audit_stock_movements ON stock_movements;
+CREATE TRIGGER audit_stock_movements
+AFTER INSERT OR UPDATE OR DELETE ON stock_movements
+FOR EACH ROW
+EXECUTE FUNCTION audit_row_change();