General source code refactoring

src/services/spa/response-shapes.js

@@ -0,0 +1,61 @@
+function createSpaResponseShapes() {
+  function findNestedObject(value, predicate, visited = new Set()) {
+    if (!value || typeof value !== "object" || visited.has(value)) {
+      return null;
+    }
+
+    visited.add(value);
+
+    if (!Array.isArray(value) && predicate(value)) {
+      return value;
+    }
+
+    for (const child of Object.values(value)) {
+      const match = findNestedObject(child, predicate, visited);
+
+      if (match) {
+        return match;
+      }
+    }
+
+    return null;
+  }
+
+  function findAccountPlanId(response) {
+    const account = findNestedObject(response, (value) => (
+      Object.prototype.hasOwnProperty.call(value, "id")
+      && value.id !== null
+      && value.id !== undefined
+      && value.id !== ""
+    ));
+    return account ? account.id : "";
+  }
+
+  function extractAccountPlans(response) {
+    const plans = [];
+    const visited = new Set();
+
+    const visit = (value) => {
+      if (!value || typeof value !== "object" || visited.has(value)) {
+        return;
+      }
+
+      visited.add(value);
+
+      if (!Array.isArray(value) && (
+        Object.prototype.hasOwnProperty.call(value, "planType")
+        || Object.prototype.hasOwnProperty.call(value, "subPlanNum")
+      )) {
+        plans.push(value);
+        return;
+      }
+
+      Object.values(value).forEach(visit);
+    };
+
+    visit(response);
+    return plans;
+  }
+
+  return { findNestedObject, findAccountPlanId, extractAccountPlans };
+}