Function getValueAtPath

client/src/utils/jsonUtils.ts:223–252

(
  obj: JsonValue,
  path: string[],
  defaultValue: JsonValue = null,
)

 * @returns The value at the path, or defaultValue if not found
 */
export function getValueAtPath(
  obj: JsonValue,
  path: string[],
  defaultValue: JsonValue = null,
): JsonValue {
  if (path.length === 0) return obj;

  const [first, ...rest] = path;

  if (obj === null || obj === undefined) {
    return defaultValue;
  }

  if (Array.isArray(obj)) {
    const index = Number(first);
    if (isNaN(index) || index < 0 || index >= obj.length) {
      return defaultValue;
    }
    return getValueAtPath(obj[index], rest, defaultValue);
  }

  if (typeof obj === "object" && obj !== null) {
    if (!(first in obj)) {
      return defaultValue;
    }
    return getValueAtPath((obj as JsonObject)[first], rest, defaultValue);
  }

  return defaultValue;
}