Direct posting to GL accountswith more than one related tax type forbidden.

[fa-stable.git] / taxes / db / tax_types_db.inc

diff --git a/taxes/db/tax_types_db.inc b/taxes/db/tax_types_db.inc
index 97a623290a272e0360390e4fe4895c666c65e8eb..672a4e3613a53a327eeb32e4e64edc83fb7b74b7 100644 (file)
--- a/taxes/db/tax_types_db.inc
+++ b/taxes/db/tax_types_db.inc
@@ -60,7 +60,6 @@ function get_tax_type($type_id)
                AND ".TB_PREF."tax_types.purchasing_gl_code = Chart2.account_code AND id=$type_id";
 
        $result = db_query($sql, "could not get tax type");
-
        return db_fetch($result);
 }
 
@@ -90,4 +89,27 @@ function delete_tax_type($type_id)
        commit_transaction();
 }
 
+/*
+       Check if gl_code is used by more than 2 tax types,
+       or check if the two gl codes are not used by any other 
+       than selected tax type.
+       Necessary for pre-2.2 installations.
+*/
+function is_tax_gl_unique($gl_code, $gl_code2=-1, $selected_id=-1) {
+
+       $purch_code = $gl_code2== -1 ? $gl_code : $gl_code2;
+
+       $sql = "SELECT count(*) FROM "
+               .TB_PREF."tax_types     
+               WHERE (sales_gl_code=" .db_escape($gl_code)
+               ." OR purchasing_gl_code=" .db_escape($purch_code). ")";
+
+       if ($selected_id != -1)
+               $sql .= " AND id!=".db_escape($selected_id);
+
+       $res = db_query($sql, "could not query gl account uniqueness");
+       $row = db_fetch($res);
+
+       return $gl_code2 == -1 ? ($row[0] <= 1) : ($row[0] == 0);
+}
 ?>
\ No newline at end of file