Andrew Aquino 3e2a8bd421 fix(site/src): show tooltip in AppLink + WorkspacesTable when coder_app URL is invalid (#27556)
fixes DEVEX-70

## Summary

Fixes #22350.

`getAppHref()` in `site/src/modules/apps/apps.ts` called `new
URL(app.url)` unguarded for external apps. When a template author
configures a `coder_app` with an unparseable `url` (e.g. a bare string
like `"my-repo"` with no scheme), `new URL()` threw `TypeError: Failed
to construct 'URL': Invalid URL` during render. Because `getAppHref`
runs inside `useAppLink` (used by both `AppLink` and the workspaces
table `IconAppLink`), the exception crashed the entire Workspace List
and Workspace detail pages, not just the affected app button.

## Changes

- `getAppHref()` no longer throws: the external-app protocol parse is
wrapped in `try/catch`, so an unparseable URL falls back to the raw
value instead of crashing.
- Added `isExternalAppUrlInvalid(app)`, a pure predicate used by
consumers to decide whether the app can be launched.
- `AppLink` renders a disabled button with a warning icon and an
explanatory tooltip when the URL is invalid, mirroring the existing
"admin has not configured subdomain application access" pattern. The
tooltip points the user at the responsible configuration:
> This app has an invalid URL and can't be opened. Ask your template
administrator to fix the app's `url` in the template's `coder_app`
configuration.
- `IconAppLink` (workspaces table) renders a non-navigating icon with an
equivalent label for invalid URLs.

## Testing

- Unit tests in `apps.test.ts`: `getAppHref` no longer throws for
invalid URLs, plus coverage of `isExternalAppUrlInvalid`.
- New `InvalidExternalAppUrl` Storybook story with a `play` function
asserting the button is disabled and the tooltip explains the invalid
URL.
- `pnpm exec vitest run` (unit + storybook), `pnpm exec tsc --noEmit`,
and `biome check` all pass.

<details>
<summary>Implementation plan</summary>

# Plan: Handle invalid `coder_app` URLs gracefully (issue #22350)

## Problem

`getAppHref()` in `site/src/modules/apps/apps.ts` calls `new
URL(app.url)`
unguarded for external apps. When a template author sets an external app
with
an unparseable `url` (e.g. a bare string like `"my-repo"` with no
scheme),
`new URL()` throws during render. Because `getAppHref` runs inside
`useAppLink` (called during render of `AppLink` and `IconAppLink`), the
exception propagates and crashes the entire Workspace List and Workspace
detail pages, not just the single app button.

## Goal

Never throw from `getAppHref`. Detect the invalid-URL case and let the
UI
render a disabled button with an explanatory tooltip, mirroring the
existing
`isAppBlockedByMissingWildcard` pattern.

## Approach

1. Make `getAppHref` non-throwing (defensive), so no render path can
crash.
2. Add a pure predicate `isExternalAppUrlInvalid(app)` used by button
   components to decide whether to disable and what tooltip to show.
3. Wire the predicate into `AppLink` and `IconAppLink`.

## Changes

- `apps.ts`: wrap the external protocol parse in `try/catch`; add
  `isExternalAppUrlInvalid`.
- `AppLink.tsx`: disabled state with `text-content-warning` icon and a
`ReactNode` (React Fragment) tooltip with `url` and `coder_app` wrapped
in
  inline `<code>` elements.
- `WorkspacesTable.tsx` (`IconAppLink`): render a non-navigating icon
when
  the URL is invalid.

## Tests

- `apps.test.ts`: `getAppHref` does not throw for invalid URLs;
predicate
  coverage.
- `AppLink.stories.tsx`: `InvalidExternalAppUrl` story with a `play`
function
  asserting disabled button and tooltip.

## Out of scope

Backend/template-side validation of `coder_app.url` would prevent the
misconfiguration at its source; tracked by the parent epic (#22349 /
DEVEX-60).

</details>

---

*Opened by Coder Agents on behalf of @aqandrew.*
2026-08-05 13:37:40 -07:00
2022-04-04 11:55:06 -05:00

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