refactor: drop speculative prose markers, keep only backtick extraction
Per operator review on the PR: the prose marker list ('new password is:',
' to:', 'changed to:', etc.) was speculative — built from a misread
screenshot, not a real reply. The conduit admin bot always code-spans the
password, so the backtick anchor is the verified, complete format. Removing
the markers leaves a ~15-line function that's honest about what it parses.
If a non-code-span format ever appears, extract_new_password returns None and
the diagnostic logging in admin_room_send_and_poll records the raw body, so a
real format change is visible — far better than a speculative marker silently
mis-parsing it. Tests now cover the live format, symbol passwords, the
code-spanned-user-id error guard, and the no-codespan / non-password cases.
This commit is contained in:
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2d8a68e4d1
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1 changed files with 56 additions and 173 deletions
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@ -350,189 +350,50 @@ async fn discover_admin_room_id(
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})
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}
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/// Try to parse the new password from an admin-room bot response.
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/// Conduwuit/tuwunel responds with a message like:
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/// "Done: Password of user @user:server has been reset. The new password is: <password>"
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/// Extract the new password from a conduit/tuwunel admin-room reset reply.
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///
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/// Handles several format variants emitted by different tuwunel / conduwuit
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/// versions — "new password is:", "password is:", "changed to:", etc.
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/// The admin bot always renders the new password as a backtick code span.
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/// The live reply observed in the `#admins` room is:
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/// "Successfully reset the password for user @x:server: `<password>`"
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/// The surrounding prose varies between builds (the delimiter is `: ` after
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/// the user id, not `" to:"`), so we anchor on the code span rather than
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/// parsing the prose. Returns the content of the first backtick pair when the
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/// message is a password-reset success.
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///
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/// Uses [`str::to_ascii_lowercase`] for case folding — unlike `to_lowercase`,
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/// ASCII lowercasing is guaranteed to produce a same-byte-length string, so the
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/// byte offset from `find` is always a valid index into the original `bot_message`
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/// and we never slice at a non-char boundary.
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/// Guard: an error reply can also code-span the *user id* ("@x:server"); a
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/// real password has no whitespace and isn't a `@localpart:server` id, so we
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/// reject that shape and return `None`. On `None` the caller surfaces the
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/// timeout and `admin_room_send_and_poll` logs the unparsed body — so a
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/// future format change is visible rather than silently mis-parsed.
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fn extract_new_password(bot_message: &str) -> Option<String> {
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// ASCII lowercase: same byte length as the original, so positions from
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// `lower.find(marker)` are valid byte indices into `bot_message`.
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let lower = bot_message.to_ascii_lowercase();
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// Primary strategy: the conduit/tuwunel admin bot always renders the new
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// password as a backtick code span. The live reply observed in the admin
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// room is:
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// "Successfully reset the password for user @x:server: `<password>`"
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// (note the delimiter is ": " after the user id, NOT " to:" — the prose
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// wording varies between builds, so anchoring on the code span is the
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// robust extraction). Take the content of the first backtick pair when the
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// message is a password-reset success. Guard against grabbing a code-spanned
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// matrix user id ("@x:server") from an error message: a real password has
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// no whitespace and isn't a `@localpart:server` id.
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if lower.contains("password")
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&& let Some(open) = bot_message.find('`')
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// Only consider password-reset success replies.
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if !bot_message.to_ascii_lowercase().contains("password") {
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return None;
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}
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// Content of the first backtick code span.
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let open = bot_message.find('`')?;
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let after = &bot_message[open + 1..];
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let close = after.find('`')?;
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let pw = &after[..close];
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// Reject a code-spanned matrix user id from an error reply, and any
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// multi-token span — generated passwords are a single whitespace-free run.
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if pw.is_empty()
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|| pw.contains(char::is_whitespace)
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|| (pw.starts_with('@') && pw.contains(':'))
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{
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let after = &bot_message[open + 1..];
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if let Some(close) = after.find('`') {
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let pw = &after[..close];
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if !pw.is_empty()
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&& !pw.contains(char::is_whitespace)
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&& !(pw.starts_with('@') && pw.contains(':'))
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{
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return Some(pw.to_owned());
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}
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}
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return None;
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}
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for marker in &[
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// Explicit "is:" variants (most common in conduwuit / tuwunel):
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"new password is: ",
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"new password is:",
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"password is: ",
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"password is:",
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// "changed to:" / "reset to:" / "set to:" variants:
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"changed to: ",
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"changed to:",
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"reset to: ",
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"reset to:",
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"set to: ",
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"set to:",
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// Generic "… to: <pw>" form. tuwunel's actual reset-password reply is
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// "Successfully reset password for @user:server to: <password>" — the
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// password follows " to: " but no recognised verb sits adjacent to it,
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// so the markers above miss it. Matrix user ids / server names can't
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// contain " to: ", so this only ever anchors on the prose delimiter.
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// Placed after the specific verb markers and before the bare
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// "password:" last resort.
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" to: ",
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// Bare "new password:" without "is":
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"new password: ",
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"new password:",
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// Bare "password:" as last resort (must come after more specific markers):
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"password: ",
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"password:",
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] {
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if let Some(pos) = lower.find(marker) {
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let rest = &bot_message[pos + marker.len()..];
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// Strip leading whitespace, then a leading code-span backtick:
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// tuwunel renders the password as a code span, so the plain
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// `body` carries literal backticks ("… to: `<pw>`").
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let rest = rest.trim_start().trim_start_matches('`');
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// The password ends at the first whitespace OR the closing
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// backtick. Generated passwords contain neither, so this never
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// truncates a real password mid-token.
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let end = rest
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.find(|c: char| c.is_whitespace() || c == '`')
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.unwrap_or(rest.len());
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let pw = rest[..end].trim();
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if !pw.is_empty() {
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return Some(pw.to_owned());
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}
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}
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}
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None
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Some(pw.to_owned())
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}
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#[cfg(test)]
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mod extract_new_password_tests {
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use super::extract_new_password;
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#[test]
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fn tuwunel_style_response() {
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let msg = "Done: Password of user @atlas:pr1ma.darkest.space has been reset. The new password is: abc123XYZ!";
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assert_eq!(extract_new_password(msg).as_deref(), Some("abc123XYZ!"));
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}
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#[test]
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fn case_insensitive_marker() {
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let msg = "Password reset complete. New Password Is: S3cr3tP@ss";
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assert_eq!(extract_new_password(msg).as_deref(), Some("S3cr3tP@ss"));
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}
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#[test]
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fn marker_without_trailing_space() {
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let msg = "new password is:hunter2";
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assert_eq!(extract_new_password(msg).as_deref(), Some("hunter2"));
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}
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#[test]
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fn shorter_marker_variant() {
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let msg = "Your password is: Tr0ub4dor&3";
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assert_eq!(extract_new_password(msg).as_deref(), Some("Tr0ub4dor&3"));
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}
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#[test]
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fn no_match_returns_none() {
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let msg = "Command not recognised. Please try again.";
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assert_eq!(extract_new_password(msg), None);
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}
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#[test]
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fn empty_after_marker_returns_none() {
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let msg = "new password is: ";
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assert_eq!(extract_new_password(msg), None);
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}
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#[test]
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fn password_stops_at_whitespace() {
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let msg = "New password is: abc123 (save it now)";
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assert_eq!(extract_new_password(msg).as_deref(), Some("abc123"));
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}
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#[test]
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fn changed_to_variant() {
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let msg = "Password of user @atlas:pr1ma.darkest.space has been changed to: Xyz987!";
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assert_eq!(extract_new_password(msg).as_deref(), Some("Xyz987!"));
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}
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#[test]
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fn reset_to_variant() {
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let msg = "Password for user @foo:bar has been reset to: hunter2";
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assert_eq!(extract_new_password(msg).as_deref(), Some("hunter2"));
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}
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#[test]
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fn tuwunel_reset_password_for_to_variant() {
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// The actual tuwunel admin-room reply observed in production — the
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// verb ("reset") is not adjacent to "to:", so only the generic
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// " to: " marker catches it.
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let msg = "Successfully reset password for @atlas:pr1ma.darkest.space to: N3wP@ssw0rd";
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assert_eq!(extract_new_password(msg).as_deref(), Some("N3wP@ssw0rd"));
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}
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#[test]
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fn to_marker_not_confused_by_user_id() {
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// The user id contains no " to: " so the marker only fires on the
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// real delimiter; the password is the token right after it.
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let msg = "Successfully reset password for @sock:pr1ma.darkest.space to: abc123XYZ";
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assert_eq!(extract_new_password(msg).as_deref(), Some("abc123XYZ"));
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}
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#[test]
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fn backtick_wrapped_password() {
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// tuwunel renders the password as a code span; the plain body
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// carries literal backticks. Strip them, don't capture them.
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let msg = "Successfully reset password for @atlas:pr1ma.darkest.space to: `N3wP@ssw0rd`";
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assert_eq!(extract_new_password(msg).as_deref(), Some("N3wP@ssw0rd"));
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}
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#[test]
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fn backtick_wrapped_with_trailing_text() {
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let msg = "Done. New password is: `hunter2` (store it now)";
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assert_eq!(extract_new_password(msg).as_deref(), Some("hunter2"));
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}
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#[test]
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fn conduit_live_admin_room_format() {
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// The ACTUAL reply observed in the live #admins room — the delimiter
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// is ": " after the user id (no " to:"), password in a code span.
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// The exact reply observed in the live #admins room: ": " after the
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// user id, password in a backtick code span.
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let msg = "Successfully reset the password for user @triage:pr1ma.darkest.space: `hVfa6TpvIKnADoEJNWn9saHoI`";
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assert_eq!(
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extract_new_password(msg).as_deref(),
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@ -540,6 +401,20 @@ mod extract_new_password_tests {
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);
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}
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#[test]
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fn backtick_span_anywhere_in_prose() {
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// Wording around the code span is irrelevant — we anchor on the span.
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let msg = "Done. New password is: `hunter2` (store it now)";
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assert_eq!(extract_new_password(msg).as_deref(), Some("hunter2"));
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}
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#[test]
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fn password_with_symbols_inside_span() {
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// '@' mid-token is fine — only a leading "@…:…" user-id shape is rejected.
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let msg = "Successfully reset the password for user @atlas:pr1ma.darkest.space: `N3wP@ss-w0rd!`";
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assert_eq!(extract_new_password(msg).as_deref(), Some("N3wP@ss-w0rd!"));
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}
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#[test]
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fn codespan_userid_in_error_not_mistaken_for_password() {
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// An error that code-spans the user id must not yield it as a password.
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@ -548,15 +423,23 @@ mod extract_new_password_tests {
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}
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#[test]
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fn bare_new_password_colon() {
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let msg = "New password: P@ssword1";
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assert_eq!(extract_new_password(msg).as_deref(), Some("P@ssword1"));
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fn no_codespan_returns_none() {
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// No backtick span → unparseable here; the caller logs the raw body
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// so a genuinely new format surfaces instead of being mis-parsed.
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let msg = "Password reset complete. New password is: abc123XYZ";
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assert_eq!(extract_new_password(msg), None);
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}
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#[test]
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fn bare_password_colon_last_resort() {
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let msg = "Your account password: S3cr3t";
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assert_eq!(extract_new_password(msg).as_deref(), Some("S3cr3t"));
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fn non_password_message_returns_none() {
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let msg = "Command not recognised. Please try again.";
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assert_eq!(extract_new_password(msg), None);
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}
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#[test]
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fn empty_codespan_returns_none() {
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let msg = "Successfully reset the password for user @x:server: ``";
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assert_eq!(extract_new_password(msg), None);
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}
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}
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