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import camelcaseKeys from "camelcase-keys"; import snakecaseKeys from "snakecase-keys"; function isPlainObject(value: unknown): value is Record<string, unknown> { return ( Object.prototype.toString.call(value) === "[object Object]" && (value?.constructor === Object || value?.constructor == null) ); } /** * Converts a value to snake_case if it's a plain object. * Returns {} for null/undefined. * Returns all other types unchanged. */ export function convertToSnakeCase<T>(body: T): T { if (body == null) return {} as T; if (Array.isArray(body)) { return body.map((item) => convertToSnakeCase(item)) as T; } if (isPlainObject(body)) { return snakecaseKeys(body as Record<string, unknown>, { deep: true }) as T; } return body; } /** * Converts a value to camelCase if it's a plain object. * Returns {} for null/undefined. * Returns all other types unchanged. */ export function convertToCamelCase<T>(body: T): T { if (body == null) return {} as T; // null or undefined → empty object // NEW: handle arrays first if (Array.isArray(body)) { return body.map((item) => convertToCamelCase(item)) as T; } if (isPlainObject(body)) { // Plain object: convert return camelcaseKeys(body as Record<string, unknown>, { deep: true }) as T; } // Array, string, number, boolean, etc.: return as-is return body; }