gristlabs_grist-core/app/server/lib/ExportXLSX.ts
George Gevoian 0717ee627e (core) Relocate export urls to /download/
Summary:
Moves CSV and XLSX export urls under /download/, and
removes the document title query parameter which is now
retrieved from the backend.

Test Plan: No new tests. Existing tests that verify endpoints still function.

Reviewers: paulfitz

Reviewed By: paulfitz

Differential Revision: https://phab.getgrist.com/D3010
2021-09-02 09:36:33 -07:00

123 lines
4.1 KiB
TypeScript

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