From 48fb51deae6376a32e3eaf215d0f7a4028215bd3 Mon Sep 17 00:00:00 2001
From: alec_dev <acwhite211@gmail.com>
Date: Fri, 1 May 2026 14:02:47 -0500
Subject: [PATCH 1/2] Fix WorkBench export file extension for selected
 delimiter

---
 .../lib/components/WorkBench/helpers.ts       | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/specifyweb/frontend/js_src/lib/components/WorkBench/helpers.ts b/specifyweb/frontend/js_src/lib/components/WorkBench/helpers.ts
index 4dc12cdf717..089b5509bf1 100644
--- a/specifyweb/frontend/js_src/lib/components/WorkBench/helpers.ts
+++ b/specifyweb/frontend/js_src/lib/components/WorkBench/helpers.ts
@@ -3,6 +3,21 @@ import { stringify } from 'csv-stringify/browser/esm';
 import type { RA } from '../../utils/types';
 import { downloadFile } from '../Molecules/FilePicker';
 
+const delimiterFileExtensions = new Map<string, string>([
+  [',', 'csv'],
+  [';', 'csv'],
+  ['\t', 'tsv'],
+  ['|', 'psv'],
+  [' ', 'txt'],
+]);
+
+const knownDelimitedFileExtension = /\.(csv|psv|tsv|txt)$/iu;
+
+export const getDelimitedFileName = (name: string, delimiter: string): string =>
+  `${name.replace(knownDelimitedFileExtension, '')}.${
+    delimiterFileExtensions.get(delimiter) ?? 'txt'
+  }`;
+
 export const downloadDataSet = async (
   name: string,
   rows: RA<RA<string>>,
@@ -19,9 +34,7 @@ export const downloadDataSet = async (
       },
       (error, output) => {
         if (error === undefined)
-          resolve(
-            downloadFile(name.endsWith('.csv') ? name : `${name}.tsv`, output)
-          );
+          resolve(downloadFile(getDelimitedFileName(name, delimiter), output));
         else reject(error);
       }
     )

From 3893bf60cbfe108bc8fe239ec39476c970e7395c Mon Sep 17 00:00:00 2001
From: alec_dev <acwhite211@gmail.com>
Date: Fri, 1 May 2026 14:18:30 -0500
Subject: [PATCH 2/2] Add tests for choosing file formatting

---
 .../WorkBench/__tests__/helpers.test.ts       | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 specifyweb/frontend/js_src/lib/components/WorkBench/__tests__/helpers.test.ts

diff --git a/specifyweb/frontend/js_src/lib/components/WorkBench/__tests__/helpers.test.ts b/specifyweb/frontend/js_src/lib/components/WorkBench/__tests__/helpers.test.ts
new file mode 100644
index 00000000000..92e6cfb2373
--- /dev/null
+++ b/specifyweb/frontend/js_src/lib/components/WorkBench/__tests__/helpers.test.ts
@@ -0,0 +1,40 @@
+import { theories } from '../../../tests/utils';
+import { getDelimitedFileName } from '../helpers';
+
+theories(getDelimitedFileName, [
+  {
+    name: 'uses csv for comma delimiters',
+    in: ['Data Set', ','],
+    out: 'Data Set.csv',
+  },
+  {
+    name: 'uses csv for semicolon delimiters',
+    in: ['Data Set', ';'],
+    out: 'Data Set.csv',
+  },
+  {
+    name: 'uses tsv for tab delimiters',
+    in: ['Data Set', '\t'],
+    out: 'Data Set.tsv',
+  },
+  {
+    name: 'uses psv for pipe delimiters',
+    in: ['Data Set', '|'],
+    out: 'Data Set.psv',
+  },
+  {
+    name: 'uses txt for space delimiters',
+    in: ['Data Set', ' '],
+    out: 'Data Set.txt',
+  },
+  {
+    name: 'replaces known delimited file extensions',
+    in: ['Data.Set.TSV', ','],
+    out: 'Data.Set.csv',
+  },
+  {
+    name: 'preserves periods that are not known extensions',
+    in: ['Dr. Smith Data Set', ','],
+    out: 'Dr. Smith Data Set.csv',
+  },
+]);