eslint-plugin-i18n-json/src/util/get-translation-file-source.js

Fully extendable eslint plugin for JSON i18n translation files.

const path = require('path');

const isJSONFile = context => path.extname(context.getFilename()) === '.json';

const INVALID_SOURCE = {
  valid: false,
  source: null,
  sourceFilePath: null
};

module.exports = ({ context, node }) => {
  if (
    !isJSONFile(context) ||
    !Array.isArray(node.comments) ||
    node.comments.length < 2
  ) {
    // is not a json file or the file
    // has not been through the plugin preprocessor
    return INVALID_SOURCE;
  }

  const { value: source } = node.comments[0];
  const { value: sourceFilePath } = node.comments[1];

  // valid source
  return {
    valid: true,
    source: source && source.trim(),
    sourceFilePath: sourceFilePath && sourceFilePath.trim()
  };
};