Project import generated by Copybara.
GitOrigin-RevId: d9e9e3fb4e31372ec1fb43b178994ca78fa8fe70
diff --git a/static_src/elements/framework/mr-issue-list/list-to-csv-helpers.js b/static_src/elements/framework/mr-issue-list/list-to-csv-helpers.js
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+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/** @const {string} CSV download link's data href prefix, RFC 4810 Section 3 */
+export const CSV_DATA_HREF_PREFIX = 'data:text/csv;charset=utf-8,';
+
+/**
+ * Format array into plaintext csv
+ * @param {Array<Array>} data
+ * @return {string}
+ */
+export const convertListContentToCsv = (data) => {
+ const result = data.reduce((acc, row) => {
+ return `${acc}\r\n${row.map(preventCSVInjectionAndStringify).join(',')}`;
+ }, '');
+ // Remove leading /r and /n
+ return result.slice(2);
+};
+
+/**
+ * Prevent CSV injection, escape double quotes, and wrap with double quotes
+ * See owasp.org/index.php/CSV_Injection
+ * @param {string} cell
+ * @return {string}
+ */
+export const preventCSVInjectionAndStringify = (cell) => {
+ // Prepend all double quotes with another double quote, RFC 4810 Section 2.7
+ let escaped = cell.replace(/"/g, '""');
+
+ // prevent CSV injection: owasp.org/index.php/CSV_Injection
+ if (cell[0] === '=' ||
+ cell[0] === '+' ||
+ cell[0] === '-' ||
+ cell[0] === '@') {
+ escaped = `'${escaped}`;
+ }
+
+ // Wrap cell with double quotes, RFC 4810 Section 2.7
+ return `"${escaped}"`;
+};
+
+/**
+ * Prepare data for csv download by converting array of array into csv string
+ * @param {Array<Array<string>>} data
+ * @param {Array<string>=} headers Column headers
+ * @return {string} CSV formatted string
+ */
+export const prepareDataForDownload = (data, headers = []) => {
+ const mainContent = [headers, ...data];
+
+ return `${convertListContentToCsv(mainContent)}`;
+};
+
+/**
+ * Constructs download link url from csv string data.
+ * @param {string} data CSV data
+ * @return {string}
+ */
+export const constructHref = (data = '') => {
+ return `${CSV_DATA_HREF_PREFIX}${encodeURIComponent(data)}`;
+};