generic-json.ts

// Copyright 2022 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.

import {Updater} from '../update';
import {Version} from '../version';
import * as jp from 'jsonpath';
import {jsonStringify} from '../util/json-stringify';
import {logger as defaultLogger, Logger} from '../util/logger';

export class GenericJson implements Updater {
  readonly jsonpath: string;
  readonly version: Version;

  constructor(jsonpath: string, version: Version) {
    this.jsonpath = jsonpath;
    this.version = version;
  }
  /**
   * Given initial file contents, return updated contents.
   * @param {string} content The initial content
   * @returns {string} The updated content
   */
  updateContent(content: string, logger: Logger = defaultLogger): string {
    const data = JSON.parse(content);
    const nodes = jp.apply(data, this.jsonpath, _val => {
      return this.version.toString();
    });
    if (!nodes) {
      logger.warn(`No entries modified in ${this.jsonpath}`);
      return content;
    }
    return jsonStringify(data, content);
  }
}