const flatten = require("flat");

const flattenData = (dataArr) =>

dataArr.map((item) =>

typeof item === "string" ? item : flatten(item, { safe: true })

);

const toCSVArray = (data, duplicateRows = true) => {

return flattenData(data).reduce((acc, item) => {

let newItem = {};

let toConcat = [];

for (const key in item) {

const itemValue = item[key];

if (!(typeof itemValue === "object" && Array.isArray(itemValue))) {

newItem[key] = item[key];

} else if (

Array.isArray(itemValue) &&

itemValue.every((item) => typeof item === "string")

) {

toConcat = toConcat.concat(

itemValue.map((item) => {

return { [`${key}`]: item };

})

);

} else {

toConcat = toConcat.concat(toCSVArray(itemValue));

}

}

if (duplicateRows) {

if (toConcat.length) {

toConcat.forEach((concatItem) =>

acc.push({ ...newItem, ...concatItem })

);

} else {

acc.push(newItem);

}

return acc;

}

const [firstItem = {}, restItems = []] = toConcat;

acc.push({ ...newItem, ...firstItem });

return acc.concat(restItems);

}, []);

};

module.exports = toCSVArray;