@dnb/eufemia/extensions/forms/hooks/useExternalValue.js

DNB Eufemia Design System UI Library

"use client";

import { useContext, useMemo } from 'react';
import pointer from "../utils/json-pointer/index.js";
import DataContext from "../DataContext/Context.js";
import IterateItemContext from "../Iterate/IterateItemContext.js";
export default function useExternalValue(props) {
  const {
    path,
    itemPath,
    value = undefined,
    transformers,
    emptyValue = undefined
  } = props;
  const {
    data
  } = useContext(DataContext) || {};
  const iterateItemContext = useContext(IterateItemContext);
  const inIterate = Boolean(iterateItemContext);
  const {
    value: iterateElementValue
  } = iterateItemContext || {};
  return useMemo(() => {
    if (value !== undefined && value !== emptyValue) {
      var _transformers$current, _transformers$current2, _transformers$current3;
      return (_transformers$current = transformers === null || transformers === void 0 || (_transformers$current2 = transformers.current) === null || _transformers$current2 === void 0 || (_transformers$current3 = _transformers$current2.fromExternal) === null || _transformers$current3 === void 0 ? void 0 : _transformers$current3.call(_transformers$current2, value)) !== null && _transformers$current !== void 0 ? _transformers$current : emptyValue;
    }
    if (inIterate && itemPath) {
      if (itemPath === '/') {
        var _transformers$current4, _transformers$current5, _transformers$current6;
        return (_transformers$current4 = transformers === null || transformers === void 0 || (_transformers$current5 = transformers.current) === null || _transformers$current5 === void 0 || (_transformers$current6 = _transformers$current5.fromExternal) === null || _transformers$current6 === void 0 ? void 0 : _transformers$current6.call(_transformers$current5, iterateElementValue)) !== null && _transformers$current4 !== void 0 ? _transformers$current4 : emptyValue;
      }
      if (pointer.has(iterateElementValue, itemPath)) {
        var _transformers$current7, _transformers$current8, _transformers$current9;
        return (_transformers$current7 = transformers === null || transformers === void 0 || (_transformers$current8 = transformers.current) === null || _transformers$current8 === void 0 || (_transformers$current9 = _transformers$current8.fromExternal) === null || _transformers$current9 === void 0 ? void 0 : _transformers$current9.call(_transformers$current8, pointer.get(iterateElementValue, itemPath))) !== null && _transformers$current7 !== void 0 ? _transformers$current7 : emptyValue;
      }
    }
    if (data && path) {
      if (path === '/') {
        var _transformers$current0, _transformers$current1, _transformers$current10;
        return (_transformers$current0 = transformers === null || transformers === void 0 || (_transformers$current1 = transformers.current) === null || _transformers$current1 === void 0 || (_transformers$current10 = _transformers$current1.fromExternal) === null || _transformers$current10 === void 0 ? void 0 : _transformers$current10.call(_transformers$current1, data)) !== null && _transformers$current0 !== void 0 ? _transformers$current0 : emptyValue;
      }
      if (pointer.has(data, path)) {
        var _transformers$current11, _transformers$current12, _transformers$current13;
        return (_transformers$current11 = transformers === null || transformers === void 0 || (_transformers$current12 = transformers.current) === null || _transformers$current12 === void 0 || (_transformers$current13 = _transformers$current12.fromExternal) === null || _transformers$current13 === void 0 ? void 0 : _transformers$current13.call(_transformers$current12, pointer.get(data, path))) !== null && _transformers$current11 !== void 0 ? _transformers$current11 : emptyValue;
      }
    }
    return emptyValue;
  }, [data, emptyValue, inIterate, itemPath, iterateElementValue, path, transformers, value]);
}
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