stoplightio/json

import { GetJsonPathForPosition } from '@stoplight/types';
import { findNodeAtOffset, getNodePath } from 'jsonc-parser';

import { JsonParserResult } from './types';

export const getJsonPathForPosition: GetJsonPathForPosition<JsonParserResult<unknown>> = (
  { lineMap, ast },
  position,
) => {
  const startOffset = lineMap[position.line];
  const endOffset = lineMap[position.line + 1];

  if (startOffset === void 0) {
    return;
  }

  const node = findNodeAtOffset(
    ast,
    endOffset === void 0 ? startOffset + position.character : Math.min(endOffset, startOffset + position.character),
    true,
  );

  if (node === undefined) {
    return;
  }

  const path = getNodePath(node);
  if (path.length === 0) return;

  return path;
};