fix(ui): Proper url encoding in Impact view filters

datahub-web-react/src/app/shared/updateQueryParams.test.ts

@@ -0,0 +1,45 @@
+import { Location } from 'history';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+import updateQueryParams from '@app/shared/updateQueryParams';
+
+type MockHistory = {
+    replace: ReturnType<typeof vi.fn>;
+};
+
+function createLocation(pathname: string, search: string): Location {
+    return { pathname, search, state: null, key: 'test' } as unknown as Location;
+}
+
+describe('updateQueryParams', () => {
+    let history: MockHistory;
+
+    beforeEach(() => {
+        history = { replace: vi.fn() };
+    });
+
+    const getReplaceArgs = () => (history.replace as any).mock.calls[0][0];
+
+    it('preserves plus-encoded values (3%2B) from existing params', () => {
+        const location = createLocation('/path', '?q=3%2B');
+
+        updateQueryParams({}, location, history as any);
+
+        expect(getReplaceArgs()).toEqual({
+            pathname: '/path',
+            search: 'q=3%2B',
+        });
+    });
+
+    it('does not convert plus-encoded (3%2B) into space-encoded (3%20) when merging', () => {
+        const location = createLocation('/search', '?q=3%2B');
+
+        updateQueryParams({ page: '1' }, location, history as any);
+
+        const args = getReplaceArgs();
+        expect(args.pathname).toBe('/search');
+        expect(args.search).toContain('q=3%2B');
+        expect(args.search).not.toContain('%20');
+        expect(args.search).toContain('page=1');
+    });
+});

datahub-web-react/src/app/shared/updateQueryParams.ts

@@ -5,13 +5,14 @@ type QueryParam = {
     [key: string]: string | undefined;
 };
 
+// Doesn't support the newParams with special characters
 export default function updateQueryParams(newParams: QueryParam, location: Location, history: History) {
-    const parsedParams = QueryString.parse(location.search, { arrayFormat: 'comma' });
+    const parsedParams = QueryString.parse(location.search, { arrayFormat: 'comma', decode: false });
     const updatedParams = {
         ...parsedParams,
         ...newParams,
     };
-    const stringifiedParams = QueryString.stringify(updatedParams, { arrayFormat: 'comma' });
+    const stringifiedParams = QueryString.stringify(updatedParams, { arrayFormat: 'comma', encode: false });
 
     history.replace({
         pathname: location.pathname,