Add MRVS normalization and reset on change

Author: hanna-g-sn

Client-Side Components/Catalog Client Script/Normalise and Reset a MRVS based on Variable Changes/mrvs_normalise_onchange.js

@@ -0,0 +1,45 @@
+function onChange(control, oldValue, newValue, isLoading) {
+  if (isLoading) return;
+
+  var MRVS_NAME = 'MY_MRVS';                 // your MRVS variable name
+  var COLUMNS_TO_CLEAR = ['env', 'owner'];   // MRVS column names to clear
+  var UNIQUE_KEY = 'hostname';               // MRVS column that should be unique
+  var SORT_BY = 'hostname';                  // MRVS column to sort by
+
+  try {
+    var raw = g_form.getValue(MRVS_NAME);
+    var rows = raw ? JSON.parse(raw) : [];
+    if (!Array.isArray(rows)) rows = [];
+
+    // Clear specified columns
+    rows.forEach(function(row) {
+      COLUMNS_TO_CLEAR.forEach(function(col) { if (row.hasOwnProperty(col)) row[col] = ''; });
+    });
+
+    // Deduplicate by UNIQUE_KEY
+    if (UNIQUE_KEY) {
+      var seen = {};
+      rows = rows.filter(function(row) {
+        var key = String(row[UNIQUE_KEY] || '').toLowerCase();
+        if (!key || seen[key]) return false;
+        seen[key] = true;
+        return true;
+      });
+    }
+
+    // Sort (case-insensitive)
+    if (SORT_BY) {
+      rows.sort(function(a, b) {
+        var A = String(a[SORT_BY] || '').toLowerCase();
+        var B = String(b[SORT_BY] || '').toLowerCase();
+        if (A < B) return -1;
+        if (A > B) return 1;
+        return 0;
+      });
+    }
+
+    g_form.setValue(MRVS_NAME, JSON.stringify(rows));
+  } catch (e) {
+    console.error('MRVS normalise failed', e);
+  }
+}