within range provide a drop reason and consider parity of number

1 files changed, 16 insertions, 2 deletions

diff --git a/lib/withinRange.js b/lib/withinRange.js
index 3408a5a..7b6aa18 100644
--- a/lib/withinRange.js
+++ b/lib/withinRange.js
@@ -1,10 +1,12 @@
 /**
  * @param {Object} feature
  * @param {Object} rangeFeature
+ * @param {Object} options
+ * @param {boolean} options.matchParity - if the parity of the number must match the range to be considered within (eg. if true, then 2 would not be within 1-3 but would be within 2-4 or within 0-4)
  *
  * @returns {boolean} True if addr:housenumber of feature is within the range of addr:housenumber rangeFeature and all other addr:* attributes match
  */
-module.exports = (feature, rangeFeature) => {
+module.exports = (feature, rangeFeature, options) => {
   const regexp = /^(?<pre>\D*)(?<num>\d*)(?<suf>\D*)$/
 
   if (
@@ -33,7 +35,19 @@ module.exports = (feature, rangeFeature) => {
         Number(i.num) >= Number(from.num) && Number(i.num) <= Number(to.num)
       ) {
         // feature within featureRange (ignore prefix/suffix)
-        return true
+        if (options && options.matchParity) {
+          // if parity matches (ie. both number and from/to are even, or both are odd, but not one even and one odd)
+          if (
+            ((Number(i.num) % 2) === (Number(from.num) % 2)) &&
+            ((Number(i.num) % 2) === (Number(to.num) % 2))
+          ) {
+            return true
+          } else {
+            return false
+          }
+        } else {
+          return true
+        }
       } else {
         return false
       }