feat(aci): Add issue preview to uptime monitor form

static/app/views/detectors/components/forms/uptime/formatUptimeUrl.spec.ts

@@ -0,0 +1,17 @@
+import {formatUptimeUrl} from 'sentry/views/detectors/components/forms/uptime/formatUptimeUrl';
+
+describe('formatUptimeUrl', () => {
+  it('returns the host when the URL has no path', () => {
+    expect(formatUptimeUrl('https://example.com')).toBe('example.com');
+  });
+
+  it('includes the path and strips a trailing slash', () => {
+    expect(formatUptimeUrl('https://example.com/health/check/')).toBe(
+      'example.com/health/check'
+    );
+  });
+
+  it('returns null for invalid URLs', () => {
+    expect(formatUptimeUrl('not-a-url')).toBeNull();
+  });
+});

static/app/views/detectors/components/forms/uptime/formatUptimeUrl.ts

@@ -0,0 +1,15 @@
+/**
+ * Takes a full URL used by the uptime detector and formats it nicely for display purposes
+ *
+ * https://example.com/health/check/ -> example.com/health/check
+ */
+export function formatUptimeUrl(url: string): string | null {
+  const parsedUrl = URL.parse(url);
+  if (!parsedUrl?.hostname) {
+    return null;
+  }
+
+  const path = parsedUrl.pathname === '/' ? '' : parsedUrl.pathname;
+
+  return `${parsedUrl.hostname}${path}`.replace(/\/$/, '');
+}

static/app/views/detectors/components/forms/uptime/index.tsx

@@ -27,9 +27,11 @@ import {
   uptimeFormDataToEndpointPayload,
   uptimeSavedDetectorToFormData,
 } from 'sentry/views/detectors/components/forms/uptime/fields';
+import {formatUptimeUrl} from 'sentry/views/detectors/components/forms/uptime/formatUptimeUrl';
 import {PreviewSection} from 'sentry/views/detectors/components/forms/uptime/previewSection';
 import {UptimeRegionWarning} from 'sentry/views/detectors/components/forms/uptime/regionWarning';
 import {UptimeDetectorResolveSection} from 'sentry/views/detectors/components/forms/uptime/resolve';
+import {UptimeIssuePreview} from 'sentry/views/detectors/components/forms/uptime/uptimeIssuePreview';
 import {UptimeDetectorVerificationSection} from 'sentry/views/detectors/components/forms/uptime/verification';
 
 const ENVIRONMENT_CONFIG: EnvironmentConfig = {
@@ -49,14 +51,11 @@ function UptimeDetectorForm() {
       return null;
     }
 
-    const parsedUrl = URL.parse(url);
-    if (!parsedUrl) {
+    const urlName = formatUptimeUrl(url);
+    if (!urlName) {
       return null;
     }
 
-    const path = parsedUrl.pathname === '/' ? '' : parsedUrl.pathname;
-    const urlName = `${parsedUrl.hostname}${path}`.replace(/\/$/, '');
-
     return t('Uptime check for %s', urlName);
   });
 
@@ -70,6 +69,7 @@ function UptimeDetectorForm() {
       <UptimeDetectorResolveSection step={nextStep()} />
       <AssignSection step={nextStep()} />
       <DescribeSection step={nextStep()} />
+      <UptimeIssuePreview step={nextStep()} />
       <AutomateSection step={nextStep()} />
     </Stack>
   );

static/app/views/detectors/components/forms/uptime/uptimeIssuePreview.tsx

@@ -0,0 +1,43 @@
+import {t} from 'sentry/locale';
+import {DetectorIssuePreview} from 'sentry/views/detectors/components/forms/common/detectorIssuePreview';
+import {IssuePreviewSection} from 'sentry/views/detectors/components/forms/common/issuePreviewSection';
+import {ownerToActor} from 'sentry/views/detectors/components/forms/common/ownerToActor';
+import {useDetectorFormContext} from 'sentry/views/detectors/components/forms/context';
+import {useUptimeDetectorFormField} from 'sentry/views/detectors/components/forms/uptime/fields';
+import {formatUptimeUrl} from 'sentry/views/detectors/components/forms/uptime/formatUptimeUrl';
+
+const FALLBACK_ISSUE_TITLE = t('Downtime detected for …');
+const SUBTITLE = t('Your monitored domain is down');
+
+function useUptimeIssueTitle() {
+  const url = useUptimeDetectorFormField('url');
+
+  if (!url) {
+    return FALLBACK_ISSUE_TITLE;
+  }
+
+  const displayUrl = formatUptimeUrl(url);
+  if (!displayUrl) {
+    return FALLBACK_ISSUE_TITLE;
+  }
+
+  return t('Downtime detected for %s', displayUrl);
+}
+
+export function UptimeIssuePreview({step}: {step?: number}) {
+  const owner = useUptimeDetectorFormField('owner');
+  const issueTitle = useUptimeIssueTitle();
+  const assignee = ownerToActor(owner);
+  const {project} = useDetectorFormContext();
+
+  return (
+    <IssuePreviewSection step={step}>
+      <DetectorIssuePreview
+        issueTitle={issueTitle}
+        subtitle={SUBTITLE}
+        assignee={assignee}
+        project={project}
+      />
+    </IssuePreviewSection>
+  );
+}

static/app/views/detectors/new-setting.spec.tsx

@@ -930,6 +930,11 @@ describe('DetectorEdit', () => {
       await userEvent.click(bodyInput);
       await userEvent.paste('{"test": "data"}');
 
+      // Issue preview reflects the URL
+      expect(
+        screen.getByText('Downtime detected for uptime.example.com')
+      ).toBeInTheDocument();
+
       await selectEvent.openMenu(screen.getByLabelText('Select Environment'));
       expect(
         screen.queryByRole('menuitemradio', {name: 'All Environments'})