Add core bar-db module.

backend/bar-db.scm

@@ -0,0 +1,48 @@
+;;
+;; bar-db.scm
+;;
+;; Bar database queries.
+;;
+;; ISC License
+;;
+;; Copyright 2023-2025 Brmlab, z.s.
+;; Dominik Pantůček <dominik.pantucek@trustica.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.
+;;
+
+(declare (unit bar-db))
+
+(module
+    bar-db
+    (
+     bar-db-init!
+     )
+
+  (import scheme
+	  (chicken base)
+	  postgresql)
+
+  (define bar-db-conn (make-parameter #f))
+
+  (define (bar-db-init! name host user pass)
+    (bar-db-conn
+     (connect
+      `((dbname . ,name)
+	(host . ,host)
+	(user . ,user)
+	(password . ,pass)))))
+
+  )