crack-json/dist/utilities/extractJson.js

Extracts all JSON objects from an arbitrary text document.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
const closeCharacterMap = {
  '"': '"',
  '[': ']',
  '{': '}'
};
const defaultParser = JSON.parse.bind(JSON);
/**
 * Extracts JSON entities from an arbitrary string.
 */
// eslint-disable-next-line flowtype/no-weak-types

const extractJson = (subject, configuration) => {
  const parser = configuration && configuration.parser ? configuration.parser : defaultParser;
  const filter = configuration && configuration.filter;
  const foundObjects = [];
  const rule = /["[{]/g;
  let subjectOffset = 0;

  while (true) {
    const offsetSubject = subject.slice(subjectOffset);
    const openCharacterMatch = rule.exec(offsetSubject);

    if (!openCharacterMatch) {
      break;
    }

    const openCharacter = openCharacterMatch[0];
    const closeCharacter = closeCharacterMap[openCharacter];
    const startIndex = openCharacterMatch.index;
    let haystack = offsetSubject.slice(startIndex);

    while (haystack.length) {
      if (!filter || filter(haystack)) {
        try {
          const result = parser(haystack);
          foundObjects.push(result);
          subjectOffset += startIndex + haystack.length;
          rule.lastIndex = 0;
          break;
        } catch (error) {//
        }
      }

      const offsetIndex = haystack.slice(0, -1).lastIndexOf(closeCharacter) + 1;
      haystack = haystack.slice(0, offsetIndex);
    }
  }

  return foundObjects;
};

var _default = extractJson;
exports.default = _default;
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