codeant-ai-for-open-source[bot] commented on PR #35021:
URL: https://github.com/apache/superset/pull/35021#issuecomment-3986975153
## **Sequence Diagram**
Shows the new flow where alert/report email links are rewritten to point to
a /redirect/ endpoint; the backend decides immediate redirect for internal
links or renders a React warning page for externals, and the frontend can
auto-redirect if the URL is trusted (localStorage) or let the user continue and
optionally persist trust.
```mermaid
sequenceDiagram
participant Emailer as Alert/Report Emailer
participant LinkUtil as LinkRedirect util
participant Recipient as Email Recipient (clicks link)
participant Backend as RedirectView
participant Frontend as RedirectWarning (React)
Emailer->>LinkUtil: process_html_links(description)
LinkUtil-->>Emailer: description with hrefs -> /redirect/?url={orig}
Emailer-->>Recipient: send email (contains rewritten /redirect/ links)
Recipient->>Backend: GET /redirect/?url={orig}
Backend->>Backend: validate feature flag & scheme; if internal ->
redirect to {orig}
alt Internal URL
Backend-->>Recipient: 302 redirect to {orig}
else External URL
Backend-->>Frontend: render warning app
Frontend->>Frontend: read target url, isAllowedScheme, isUrlTrusted
(localStorage)
alt URL trusted
Frontend-->>Recipient: navigate to {orig} (immediate)
else
Frontend-->>Recipient: show warning; on Continue optionally
trustUrl -> navigate to {orig}
end
end
```
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