safelink (#8917)

Co-authored-by: hailey <me@haileyok.com>
Co-authored-by: Stanislas Signoud <signez@stanisoft.net>
Co-authored-by: will berry <wsb@wills-MBP.attlocal.net>
Co-authored-by: BlueSkiesAndGreenPastures <will@blueskyweb.xyz>
Co-authored-by: Chenyu Huang <itschenyu@gmail.com>

bskylink/src/html/linkWarningContents.ts

@@ -0,0 +1,44 @@
+import escapeHTML from 'escape-html'
+import {type Request} from 'express'
+
+export function linkWarningContents(
+  req: Request,
+  opts: {
+    type: 'warn' | 'block'
+    link: string
+  },
+): string {
+  const continueButton =
+    opts.type === 'warn'
+      ? `<a class="button secondary" href="${escapeHTML(opts.link)}">${req.__('Continue Anyway')}</a>`
+      : ''
+
+  return `
+    <div class="warning-icon">⚠️</div>
+    <h1>
+      ${
+        opts.type === 'warn'
+          ? req.__('Potentially Dangerous Link')
+          : req.__('Blocked Link')
+      }
+    </h1>
+    <p class="warning-text">
+      ${
+        opts.type === 'warn'
+          ? req.__(
+              'This link may be malicious. You should proceed at your own risk.',
+            )
+          : req.__(
+              'This link has been identified as malicious and has blocked for your safety.',
+            )
+      }
+    </p>
+    <div class="blocked-site">
+      <p class="site-url">${escapeHTML(opts.link)}</p>
+    </div>
+    <div class="button-group">
+      ${continueButton}
+      <a class="button primary" href="https://bsky.app">${req.__('Return to Bluesky')}</a>
+    </div>
+  `
+}