benjamine/jsondiffpatch

import Context from './context.js';
import defaultClone from '../clone.js';
import type { Delta } from '../types.js';

class DiffContext extends Context<Delta> {
  left: unknown;
  right: unknown;
  pipe: 'diff';

  leftType?: string;
  rightType?: string;
  leftIsArray?: boolean;
  rightIsArray?: boolean;

  constructor(left: unknown, right: unknown) {
    super();
    this.left = left;
    this.right = right;
    this.pipe = 'diff';
  }

  setResult(result: Delta) {
    if (this.options!.cloneDiffValues && typeof result === 'object') {
      const clone =
        typeof this.options!.cloneDiffValues === 'function'
          ? this.options!.cloneDiffValues
          : defaultClone;
      if (typeof result[0] === 'object') {
        result[0] = clone(result[0]);
      }
      if (typeof result[1] === 'object') {
        result[1] = clone(result[1]);
      }
    }
    return super.setResult(result);
  }
}

export default DiffContext;