File: /home/cafsindia/.trash/dist/excelexport.js
/**
* __ ___ _____ _
* \ \/ / |___| ____|_ ___ __ ___ _ __| |_
* \ /| / __| _| \ \/ / '_ \ / _ \| '__| __|
* / \| \__ \ |___ > <| |_) | (_) | | | |_
* /_/\_\_|___/_____/_/\_\ .__/ \___/|_| \__|
* |_|
* 6/12/2017
* Daniel Blanco Parla
* https://github.com/deblanco/xlsExport
*/
class XlsExport {
// data: array of objects with the data for each row of the table
// name: title for the worksheet
constructor(data, title = 'Worksheet') {
// input validation: new xlsExport([], String)
if (!Array.isArray(data) || (typeof title !== 'string' || Object.prototype.toString.call(title) !== '[object String]')) {
throw new Error('Invalid input types: new xlsExport(Array [], String)');
}
this._data = data;
this._title = title;
}
set setData(data) {
if (!Array.isArray(data)) throw new Error('Invalid input type: setData(Array [])');
this._data = data;
}
get getData() {
return this._data;
}
exportToXLS(fileName = 'export.xls') {
if (typeof fileName !== 'string' || Object.prototype.toString.call(fileName) !== '[object String]') {
throw new Error('Invalid input type: exportToCSV(String)');
}
const TEMPLATE_XLS = `
<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40">
<meta http-equiv="content-type" content="application/vnd.ms-excel; charset=UTF-8"/>
<head><!--[if gte mso 9]><xml>
<x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{title}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml>
<![endif]--></head>
<body>{table}</body></html>`;
const MIME_XLS = 'application/vnd.ms-excel;base64,';
const parameters = {
title: this._title,
table: this.objectToTable(),
};
const computeOutput = TEMPLATE_XLS.replace(/{(\w+)}/g, (x, y) => parameters[y]);
const computedXLS = new Blob([computeOutput], {
type: MIME_XLS,
});
const xlsLink = window.URL.createObjectURL(computedXLS);
this.downloadFile(xlsLink, fileName);
}
exportToCSV(fileName = 'export.csv') {
if (typeof fileName !== 'string' || Object.prototype.toString.call(fileName) !== '[object String]') {
throw new Error('Invalid input type: exportToCSV(String)');
}
const computedCSV = new Blob([this.objectToSemicolons()], {
type: 'text/csv;charset=utf-8',
});
const csvLink = window.URL.createObjectURL(computedCSV);
this.downloadFile(csvLink, fileName);
}
downloadFile(output, fileName) {
const link = document.createElement('a');
document.body.appendChild(link);
link.download = fileName;
link.href = output;
link.click();
}
toBase64(string) {
return window.btoa(unescape(encodeURIComponent(string)));
}
objectToTable() {
// extract keys from the first object, will be the title for each column
const colsHead = `<tr>${Object.keys(this._data[0]).map(key => `<td>${key}</td>`).join('')}</tr>`;
const colsData = this._data.map(obj => [`<tr>
${Object.keys(obj).map(col => `<td>${obj[col] ? obj[col] : ''}</td>`).join('')}
</tr>`]) // 'null' values not showed
.join('');
return `<table>${colsHead}${colsData}</table>`.trim(); // remove spaces...
}
objectToSemicolons() {
const colsHead = Object.keys(this._data[0]).map(key => [key]).join(';');
const colsData = this._data.map(obj => [ // obj === row
Object.keys(obj).map(col => [
obj[col], // row[column]
]).join(';'), // join the row with ';'
]).join('\n'); // end of row
return `${colsHead}\n${colsData}`;
}
}
//export default XlsExport; // comment this line to babelize