csv-tools
Version:
Convert CSV to JSON and JSON to CSV.
57 lines (56 loc) • 1.94 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.jsonArrayToCsv = void 0;
function jsonArrayToCsv(jsonArray, delimiter) {
if (delimiter === void 0) { delimiter = ','; }
if (!jsonArray || jsonArray.length <= 0)
throw new Error("The array must contain at least one JSON object");
var data = [];
var headers = [];
for (var i in jsonArray) {
var jsonObject = jsonArray[i];
data[i] = [];
for (var prop in jsonObject) {
var headerArray = [];
propToHeader(jsonObject[prop], prop, headerArray, data[i]);
for (var j in headerArray) {
var header = headerArray[j];
if (headers.indexOf(header) == -1)
headers.push(header);
}
}
}
var result = headers.map(function (item) { return "\"" + item + "\""; }).join(delimiter) + "\n";
for (var z = 0; z < data.length; z++) {
var row = "";
for (var k = 0; k < headers.length; k++) {
var key = headers[k];
var value = data[z][key];
if (k > 0)
row += delimiter;
if (value !== undefined && value !== null) {
if (typeof value == "string") {
value = value.replace(/"/g, '""');
value = "\"" + value + "\"";
}
row += value;
}
}
result += row;
if (z < data.length - 1)
result += "\n";
}
return result;
}
exports.jsonArrayToCsv = jsonArrayToCsv;
function propToHeader(jsonObject, parents, headerArray, dataArray) {
if (typeof jsonObject !== "object") {
headerArray.push(parents);
dataArray[parents] = jsonObject;
}
else {
for (var p in jsonObject) {
propToHeader(jsonObject[p], parents + "." + p, headerArray, dataArray);
}
}
}