dotprompt/src/util.ts

Dotprompt: Executable GenAI Prompt Templates

/**
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

export function removeUndefinedFields(obj: any): any {
  if (obj === null || typeof obj !== 'object') {
    return obj;
  }

  if (Array.isArray(obj)) {
    return obj.map((item) => removeUndefinedFields(item));
  }

  const result: { [key: string]: any } = {};
  for (const [key, value] of Object.entries(obj)) {
    if (value !== undefined) {
      result[key] = removeUndefinedFields(value);
    }
  }
  return result;
}