ngx-mat-dynamic-table
Version:
Dynamic material table table.
38 lines • 6.09 kB
JavaScript
import { Injectable } from '@angular/core';
import * as FileSaver from 'file-saver';
import * as XLSX from 'xlsx';
import { pick, map, get as _get, partialRight, values } from 'lodash';
export class XlsxExportService {
constructor() {
this.fileType = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8';
this.fileExtension = '.xlsx';
}
exportExcel(jsonData, headers, fileName) {
const columnHeaders = values(headers);
const ws = XLSX.utils.json_to_sheet(map(this.renameKeys(jsonData, headers), partialRight(pick, columnHeaders)), { header: columnHeaders });
const wb = { Sheets: { 'data': ws }, SheetNames: ['data'] };
const excelBuffer = XLSX.write(wb, { bookType: 'xlsx', type: 'array' });
this.saveExcelFile(excelBuffer, fileName);
}
saveExcelFile(buffer, fileName) {
const data = new Blob([buffer], { type: this.fileType });
FileSaver.saveAs(data, fileName + this.fileExtension);
}
renameKeys(jsonData, headers) {
return jsonData.map(j => {
let renamed = {};
// Get all the keys of the headers
Object.keys(headers).forEach(key => {
// make the header value the new key of the renamed object.
// use the key of the header with lodash get function to get nested objects.
renamed[headers[key]] = _get(j, key);
});
return renamed;
});
}
}
XlsxExportService.decorators = [
{ type: Injectable }
];
XlsxExportService.ctorParameters = () => [];
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