because OSM tag values are limited to 255 characters, implement code to split addr:flats across addr:flatsN

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/valueLimits.js b/lib/valueLimits.js
new file mode 100644
index 0000000..c902883
--- /dev/null
+++ b/lib/valueLimits.js
@@ -0,0 +1,17 @@
+/**
+ * In OSM tag values are limited to 255 characters.
+ * Search for addr:flats beyond that limit and wrap into addr:flats2 addr:flats3 etc.
+ * 
+ * @param {Object} feature 
+ * @returns {boolean}
+ */
+module.exports = (feature) => {
+  if ('addr:flats' in feature.properties && feature.properties['addr:flats'].length > 255) {
+    // need to wrap
+    const value = feature.properties['addr:flats']
+    for (let i = 0; i < value.length; i += 255) {
+      feature.properties[`addr:flats${i === 0 ? '' : i / 255 + 1}`] = value.slice(i, i + 255)
+    }
+  }
+  return feature
+}