Function getValueFromKey

packages/data-render/src/utils/common.ts:40–88

(props: {
  path: string;
  data?: any;
  defaultValue?: any;
  addons: any;
  valueType?: string;
})

 * @returns value
 */
export const getValueFromKey = (props: {
  path: string;
  data?: any;
  defaultValue?: any;
  addons: any;
  valueType?: string;
}): string | boolean => {
  const { data, path = '', defaultValue = '', addons, valueType } = props;

  let result = null;
  let negation = null; // 否定标识 ！
  let dataPath = path;

  if (path.substring(0, 2) === '!!') {
    negation = '!!';
    dataPath = path.substring(2);
  } else if (path.substring(0, 1) === '!') {
    negation = '!';
    dataPath = path.substring(1);
  }

  // 带 source 标识，表示从顶层获取数据
  if (dataPath.includes('source:')) {
    const [_, sourcePath]: any = dataPath.split('source:');
    const sourceData = addons.getSourceData();
    result = get(sourceData, sourcePath);
  } else {
    result = get(data, dataPath);
  }

  if (!result && result !== 0 && typeof result !== 'boolean') {
    result = defaultValue;
  }

  // 根据 negation 取反, 返回结果
  if (negation === '!') {
    return !result;
  }

  if (negation === '!!') {
    return !!result;
  }

  if (result && valueType === '!object' && typeof result === 'object') {
    return '';
  }

  return result;
};

/**
 * 数据格式转换