X-Git-Url: https://delta.frontaccounting.com/gitweb/?a=blobdiff_plain;f=includes%2Fdb%2Freferences_db.inc;h=4933d8dbad0174814707b4bb792c0b8ce77a2013;hb=fd11a3b500e79a3e98f7a3860f872cd31ce33113;hp=ca086541bb55ce019c778e1ab48a8eb16a7e346d;hpb=17aa33a74912114ac4e0f00d830ae149a1e85e50;p=fa-stable.git

diff --git a/includes/db/references_db.inc b/includes/db/references_db.inc
index ca086541..4933d8db 100644
--- a/includes/db/references_db.inc
+++ b/includes/db/references_db.inc
@@ -76,4 +76,47 @@ function get_next_reference($type)
     return $row[0];
 }
 
-?>
\ No newline at end of file
+//----------------------------------------------------------------------------
+//
+//	Check if reference was not used so far (for other transaction than $trans_no)
+//
+function is_new_reference($ref, $type, $trans_no=0)
+{
+	$db_info = get_systype_db_info($type);
+	$db_name = $db_info[0];
+	$db_type = $db_info[1];
+	$db_trans = $db_info[2];
+	$db_ref = $db_info[3];
+	
+	$ref = db_escape(trim($ref));
+	$type = db_escape($type);
+	
+	if ($db_ref == null) { // journal or bank trans store references in refs table
+		$db_name = TB_PREF."refs";
+		$db_type = 'type';
+		$db_trans = 'id';
+		$db_ref = 'reference';
+	}
+
+	if ($db_type != null) {
+		$sql = "SELECT $db_ref FROM $db_name tbl
+			LEFT JOIN ".TB_PREF."voided v ON 
+				tbl.$db_type=v.type AND tbl.$db_trans=v.id
+			WHERE $db_ref=$ref AND ISNULL(v.id)
+				AND tbl.$db_type=$type";
+	} else {
+		$sql = "SELECT $db_ref ref FROM $db_name tbl
+			LEFT JOIN ".TB_PREF."voided v ON 
+				v.type=$type AND tbl.$db_trans=v.id
+			WHERE $db_ref=$ref AND ISNULL(v.id)";
+	}
+	if ($trans_no)
+			$sql .= " AND tbl.`$db_trans` != ".db_escape($trans_no);
+
+	$result = db_query($sql, "could not test for unique reference");
+
+	return (db_num_rows($result) == 0);
+
+}
+
+