2021-07-21 08:46:03 +00:00
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import {ActiveDoc} from 'app/server/lib/ActiveDoc';
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import {createExcelFormatter} from 'app/server/lib/ExcelFormatter';
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import {ExportData, exportDoc} from 'app/server/lib/Export';
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import {Alignment, Border, Fill, Workbook} from 'exceljs';
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import * as express from 'express';
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2021-09-01 21:07:53 +00:00
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import * as log from 'app/server/lib/log';
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import * as contentDisposition from 'content-disposition';
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export interface DownloadXLSXOptions {
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filename: string;
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}
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/**
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* Converts `activeDoc` to CSV and sends the converted data through `res`.
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*/
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export async function downloadXLSX(activeDoc: ActiveDoc, req: express.Request,
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res: express.Response, {filename}: DownloadXLSXOptions) {
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log.debug(`Generating .xlsx file`);
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try {
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const data = await makeXLSX(activeDoc, req);
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res.set('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
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res.setHeader('Content-Disposition', contentDisposition(filename + '.xlsx'));
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res.send(data);
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log.debug('XLSX file generated');
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} catch (err) {
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log.error("Exporting to XLSX has failed. Request url: %s", req.url, err);
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// send a generic information to client
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const errHtml =
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`<!doctype html>
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<html>
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<body>There was an unexpected error while generating a xlsx file.</body>
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</html>
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`;
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res.status(400).send(errHtml);
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}
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}
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2021-07-21 08:46:03 +00:00
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/**
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* Creates excel document with all tables from an active Grist document.
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*/
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export async function makeXLSX(
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activeDoc: ActiveDoc,
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req: express.Request): Promise<ArrayBuffer> {
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const content = await exportDoc(activeDoc, req);
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2021-07-21 16:38:57 +00:00
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const data = await convertToExcel(content, req.hostname === 'localhost');
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2021-07-21 08:46:03 +00:00
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return data;
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}
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/**
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* Converts export data to an excel file.
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*/
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async function convertToExcel(tables: ExportData[], testDates: boolean) {
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// Create workbook and add single sheet to it.
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const wb = new Workbook();
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if (testDates) {
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// HACK: for testing, we will keep static dates
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const date = new Date(Date.UTC(2018, 11, 1, 0, 0, 0));
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wb.modified = date;
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wb.created = date;
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wb.lastPrinted = date;
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wb.creator = 'test';
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wb.lastModifiedBy = 'test';
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}
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// Prepare border - some of the cells can have background colors, in that case border will
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// not be visible
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const borderStyle: Border = {
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color: { argb: 'FFE2E2E3' }, // dark gray - default border color for gdrive
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style: 'thin'
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};
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const borders = {
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left: borderStyle,
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right: borderStyle,
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top: borderStyle,
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bottom: borderStyle
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};
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const headerBackground: Fill = {
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type: 'pattern',
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pattern: 'solid',
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fgColor: { argb: 'FFEEEEEE' } // gray
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};
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const headerFontColor = {
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color: {
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argb: 'FF000000' // black
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}
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};
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const centerAlignment: Partial<Alignment> = {
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horizontal: 'center'
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};
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for (const table of tables) {
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const { columns, rowIds, access, tableName } = table;
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const ws = wb.addWorksheet(tableName);
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// Build excel formatters.
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const formatters = columns.map(col => createExcelFormatter(col.type, col.widgetOptions));
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// Generate headers for all columns with correct styles for whole column.
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// Actual header style for a first row will be overwritten later.
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ws.columns = columns.map((col, c) => ({ header: col.label, style: formatters[c].style() }));
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// Populate excel file with data
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rowIds.forEach(row => {
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ws.addRow(access.map((getter, c) => formatters[c].formatAny(getter(row))));
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});
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// style up the header row
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for (let i = 1; i <= columns.length; i++) {
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// apply to all rows (including header)
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ws.getColumn(i).border = borders;
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// apply only to header
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const header = ws.getCell(1, i);
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header.fill = headerBackground;
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header.font = headerFontColor;
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header.alignment = centerAlignment;
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}
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// Make each column a little wider.
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ws.columns.forEach(column => {
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if (!column.header) {
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return;
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}
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// 14 points is about 100 pixels in a default font (point is around 7.5 pixels)
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column.width = column.header.length < 14 ? 14 : column.header.length;
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});
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}
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return await wb.xlsx.writeBuffer();
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}
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