From: Michael Orlitzky <michael@orlitzky.com>
Date: Thu, 2 Nov 2023 02:33:17 +0000 (-0400)
Subject: index.html.in: return the empty string for unknown MARC zones
X-Git-Url: http://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=4bada97941c29af38c9b2b6b89dde71f24bae54f;p=charm-bypass.git

index.html.in: return the empty string for unknown MARC zones
---

diff --git a/index.html.in b/index.html.in
index f6094fa..b09f59a 100644
--- a/index.html.in
+++ b/index.html.in
@@ -545,10 +545,10 @@
         BWI_WBL: 1
       };
 
-      /* The default. Obviously wrong for when we don't
-       * have the necessary data. */
-      let zone = 0;
-
+      /* Compute the zone (string) for the given origin/destination pair.
+       * If we don't know it or if you chose in invalid pair (destination
+       * not on the same line as your origin?) then the empty string is
+       * returned. */
       function compute_marc_zone(src, dest) {
         /* Forward direction key for zone_map */
         const fwd = src + "_" +  dest;
@@ -558,6 +558,10 @@
          * directions here. */
         const rev = dest + "_" +  src;
 
+        /* The default. Obviously wrong for when we don't
+         * have the necessary data. */
+        let zone = -1;
+
         if (zone_map[fwd]) {
           zone = zone_map[fwd];
         }
@@ -576,7 +580,7 @@
           case 4:
             return "Four Zone";
           default:
-            return "??? Zone";
+            return "";
         }
       }