fix browser DNS resolution; closes #251

hyperglass/ui/components/looking-glass-form.tsx

@@ -72,7 +72,9 @@ export const LookingGlassForm = (): JSX.Element => {
 
   const isFqdnQuery = useCallback(
     (target: string | string[], fieldType: Directive['fieldType'] | null): boolean =>
-      typeof target === 'string' && fieldType === 'text' && isFQDN(target),
+      (typeof target === 'string' || Array.isArray(target)) &&
+      fieldType === 'text' &&
+      isFQDN(target),
     [],
   );
 

hyperglass/ui/util/common.test.ts

@@ -1,5 +1,5 @@
-import { expect, describe, it, test } from 'vitest';
-import { all, chunkArray, entries, dedupObjectArray, andJoin, isFQDN } from './common';
+import { describe, expect, it, test } from 'vitest';
+import { all, andJoin, chunkArray, dedupObjectArray, entries, isFQDN } from './common';
 
 test('all - all items are truthy', () => {
   // biome-ignore lint/suspicious/noSelfCompare: because this is a test, duh
@@ -79,12 +79,6 @@ describe('andJoin - join array of strings to sentence structure', () => {
 });
 
 describe('isFQDN - determine if a string is an FQDN pattern', () => {
-  it('is null and should be false', () => {
-    expect(isFQDN(null)).toBe(false);
-  });
-  it('is undefined and should be false', () => {
-    expect(isFQDN(undefined)).toBe(false);
-  });
   it("isn't an FQDN and should be false", () => {
     expect(isFQDN('example')).toBe(false);
   });
@@ -100,4 +94,7 @@ describe('isFQDN - determine if a string is an FQDN pattern', () => {
   it('is a longer FQDN and should be true', () => {
     expect(isFQDN('one.two.three.four.five.example.com')).toBe(true);
   });
+  it('is an array of FQDNs and should be true', () => {
+    expect(isFQDN(['www.example.com'])).toBe(true);
+  });
 });

hyperglass/ui/util/common.ts

@@ -130,7 +130,7 @@ export function andJoin(values: string[], options?: AndJoinOptions): string {
  *
  * @param value Input value.
  */
-export function isFQDN(value: unknown): value is string {
+export function isFQDN(value: string | string[]): value is string {
   /**
    * Don't set the global flag on this.
    * @see https://stackoverflow.com/questions/24084926/javascript-regexp-cant-use-twice
@@ -142,5 +142,8 @@ export function isFQDN(value: unknown): value is string {
   const pattern = new RegExp(
     /^(?!:\/\/)([a-zA-Z0-9-]+\.)*[a-zA-Z0-9-][a-zA-Z0-9-]+\.[a-zA-Z-]{2,6}?$/im,
   );
+  if (Array.isArray(value)) {
+    return isFQDN(value[0]);
+  }
   return typeof value === 'string' && pattern.test(value);
 }