nested formula

app/javascript/submission_form/formula_areas.vue

@@ -58,6 +58,13 @@ export default {
   computed: {
     isInlineSize () {
       return CSS.supports('container-type: size')
+    },
+    fieldsUuidIndex () {
+      return this.fields.reduce((acc, field) => {
+        acc[field.uuid] = field
+
+        return acc
+      }, {})
     }
   },
   async mounted () {
@@ -96,8 +103,19 @@ export default {
     findPageElementForArea (area) {
       return (this.$root.$el?.parentNode?.getRootNode() || document).getElementById(`page-${area.attachment_uuid}-${area.page}`)
     },
+    normalizeFormula (formula, depth = 0) {
+      if (depth > 10) return formula
+
+      return formula.replace(/{{(.*?)}}/g, (match, uuid) => {
+        if (this.fieldsUuidIndex[uuid]) {
+          return `(${this.normalizeFormula(this.fieldsUuidIndex[uuid].preferences.formula, depth + 1)})`
+        } else {
+          return match
+        }
+      })
+    },
     calculateFormula (field) {
-      const transformedFormula = field.preferences.formula.replace(/{{(.*?)}}/g, (match, uuid) => {
+      const transformedFormula = this.normalizeFormula(field.preferences.formula).replace(/{{(.*?)}}/g, (match, uuid) => {
         return this.readonlyValues[uuid] || this.values[uuid] || 0.0
       })