refactor(newappeal): extract payload cleanup helpers (Slice 2a)

- extracted boolean normalization

- extracted null key removal

- extracted internal key stripping

- no behaviour change

lib/newappeal/payloadCleanup.js

@@ -0,0 +1,28 @@
+export const normalizeYesNoBooleans = (updateBody) => {
+    updateBody = JSON.stringify(updateBody);
+    updateBody = updateBody.replace(/:\"Yes\"/gm, `:true`);
+    updateBody = updateBody.replace(/:\"No\"/gm, `:false`);
+    updateBody = JSON.parse(updateBody);
+
+    return updateBody;
+};
+
+export const removeNullKeys = (updateBody) => {
+    Object.keys(updateBody).forEach((key) => {
+        if (updateBody[key] === null) {
+            delete updateBody[key];
+        }
+    });
+
+    return updateBody;
+};
+
+export const stripInternalKeys = (updateBody) => {
+    Object.keys(updateBody).forEach((key) => {
+        if (key.indexOf("_") == 0) {
+            delete updateBody[key];
+        }
+    });
+
+    return updateBody;
+};