feat: Clear form element values when hidden

legalconsenthub/app/composables/useFormElementValueClearing.ts

@@ -0,0 +1,59 @@
+import type { FormElementDto, FormElementSectionDto } from '~~/.api-client'
+
+export function useFormElementValueClearing() {
+  function clearHiddenFormElementValues(
+    sections: FormElementSectionDto[],
+    previousVisibilityMap: Map<string, boolean>,
+    currentVisibilityMap: Map<string, boolean>
+  ): FormElementSectionDto[] {
+    const elementsToClean = findNewlyHiddenFormElements(previousVisibilityMap, currentVisibilityMap)
+    if (elementsToClean.size === 0) {
+      return sections
+    }
+
+    return sections.map((section) => ({
+      ...section,
+      formElementSubSections: section.formElementSubSections.map((subsection) => ({
+        ...subsection,
+        formElements: subsection.formElements.map((element) => {
+          const key = element.id || element.reference
+          if (key && elementsToClean.has(key)) {
+            return clearFormElementValue(element)
+          }
+          return element
+        })
+      }))
+    }))
+  }
+
+  function findNewlyHiddenFormElements(
+    previousMap: Map<string, boolean>,
+    currentMap: Map<string, boolean>
+  ): Set<string> {
+    const newlyHidden = new Set<string>()
+    currentMap.forEach((isVisible, key) => {
+      const wasVisible = previousMap.get(key) !== false
+      if (wasVisible && !isVisible) {
+        newlyHidden.add(key)
+      }
+    })
+    return newlyHidden
+  }
+
+  function clearFormElementValue(element: FormElementDto): FormElementDto {
+    if (['RADIOBUTTON', 'SELECT', 'CHECKBOX'].includes(element.type)) {
+      return {
+        ...element,
+        options: element.options.map((opt) => ({ ...opt, value: 'false' }))
+      }
+    }
+    return {
+      ...element,
+      options: element.options.map((opt, i) => (i === 0 ? { ...opt, value: '' } : opt))
+    }
+  }
+
+  return {
+    clearHiddenFormElementValues
+  }
+}