38 lines
1.0 KiB
JavaScript
38 lines
1.0 KiB
JavaScript
|
/**
|
||
|
|
* Performs the flattening of a data row recursively
|
||
|
|
*
|
||
|
|
* @param {String} separator Separator to be used as the flattened field name
|
||
|
|
* @returns {Object => Object} Flattened object
|
||
|
|
*/
|
||
|
|
function flatten({ objects = true, arrays = false, separator = '.' } = {}) {
|
||
|
|
function step (obj, flatDataRow, currentPath) {
|
||
|
|
Object.keys(obj).forEach((key) => {
|
||
|
|
const newPath = currentPath ? `${currentPath}${separator}${key}` : key;
|
||
|
|
const value = obj[key];
|
||
|
|
|
||
|
|
if (objects
|
||
|
|
&& typeof value === 'object'
|
||
|
|
&& value !== null
|
||
|
|
&& !Array.isArray(value)
|
||
|
|
&& Object.prototype.toString.call(value.toJSON) !== '[object Function]'
|
||
|
|
&& Object.keys(value).length) {
|
||
|
|
step(value, flatDataRow, newPath);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (arrays && Array.isArray(value)) {
|
||
|
|
step(value, flatDataRow, newPath);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
flatDataRow[newPath] = value;
|
||
|
|
});
|
||
|
|
|
||
|
|
return flatDataRow;
|
||
|
|
}
|
||
|
|
|
||
|
|
return dataRow => step(dataRow, {});
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = flatten;
|