fix: out-of-bounds depth map in getDocumentType (github#22834)

* fix: out-of-bounds depth map in getDocumentType

* convert document type map to array

Author: mikesurowiec

lib/get-document-type.js

@@ -13,20 +13,12 @@ export default function getDocumentType(relativePath) {
   // Early Access has an extra tree segment, so it has a different number of segments.
   const isEarlyAccess = relativePath.startsWith('early-access')
 
-  const publicDocs = {
-    1: 'homepage',
-    2: 'product',
-    3: 'category',
-    4: 'mapTopic',
-  }
+  const publicDocs = ['homepage', 'product', 'category', 'mapTopic']
 
-  const earlyAccessDocs = {
-    1: 'homepage',
-    2: 'early-access',
-    3: 'product',
-    4: 'category',
-    5: 'mapTopic',
-  }
+  const earlyAccessDocs = ['homepage', 'early-access', 'product', 'category', 'mapTopic']
 
-  return isEarlyAccess ? earlyAccessDocs[segmentLength] : publicDocs[segmentLength]
+  // Anything beyond the largest depth is assumed to be a mapTopic
+  return isEarlyAccess
+    ? earlyAccessDocs[Math.min(segmentLength, earlyAccessDocs.length) - 1]
+    : publicDocs[Math.min(segmentLength, publicDocs.length) - 1]
 }