//! Shared formatting for user-facing `codex resume` command hints.use codex_protocol::ThreadId;use codex_shell_command::parse_command::shlex_join;pub fn resume_command(thread_name: Option<&str>, thread_id: Option<ThreadId>) -> Option<String> {    let resume_target = thread_name        .filter(|name| !name.is_empty())        .map(str::to_string)        .or_else(|| thread_id.map(|thread_id| thread_id.to_string()));    resume_target.map(|target| {        let needs_double_dash = target.starts_with('-');        let escaped = shlex_join(&[target]);        if needs_double_dash {            format!("codex resume -- {escaped}")        } else {            format!("codex resume {escaped}")        }    })}pub fn resume_hint(thread_name: Option<&str>, thread_id: Option<ThreadId>) -> Option<String> {    let thread_id = thread_id?;    match thread_name.filter(|name| !name.is_empty()) {        Some(thread_name) => Some(format!(            "codex resume, then select {thread_name} ({thread_id})"        )),        None => resume_command(/*thread_name*/ None, Some(thread_id)),    }}#[cfg(test)]mod tests {    use super::*;    use pretty_assertions::assert_eq;    #[test]    fn prefers_name_over_id() {        let thread_id = ThreadId::from_string("123e4567-e89b-12d3-a456-426614174000").unwrap();        let command = resume_command(Some("my-thread"), Some(thread_id));        assert_eq!(command, Some("codex resume my-thread".to_string()));    }    #[test]    fn formats_thread_id_when_name_is_missing() {        let thread_id = ThreadId::from_string("123e4567-e89b-12d3-a456-426614174000").unwrap();        let command = resume_command(/*thread_name*/ None, Some(thread_id));        assert_eq!(            command,            Some("codex resume 123e4567-e89b-12d3-a456-426614174000".to_string())        );    }    #[test]    fn returns_none_without_a_resume_target() {        let command = resume_command(/*thread_name*/ None, /*thread_id*/ None);        assert_eq!(command, None);    }    #[test]    fn quotes_thread_names_when_needed() {        let command = resume_command(Some("-starts-with-dash"), /*thread_id*/ None);        assert_eq!(            command,            Some("codex resume -- -starts-with-dash".to_string())        );        let command = resume_command(Some("two words"), /*thread_id*/ None);        assert_eq!(command, Some("codex resume 'two words'".to_string()));        let command = resume_command(Some("quote'case"), /*thread_id*/ None);        assert_eq!(command, Some("codex resume \"quote'case\"".to_string()));    }    #[test]    fn resume_hint_names_picker_item_with_id() {        let thread_id = ThreadId::from_string("123e4567-e89b-12d3-a456-426614174000").unwrap();        let hint = resume_hint(Some("my-thread"), Some(thread_id));        assert_eq!(            hint,            Some(                "codex resume, then select my-thread (123e4567-e89b-12d3-a456-426614174000)"                    .to_string()            )        );    }    #[test]    fn resume_hint_uses_direct_id_command_without_name() {        let thread_id = ThreadId::from_string("123e4567-e89b-12d3-a456-426614174000").unwrap();        let hint = resume_hint(/*thread_name*/ None, Some(thread_id));        assert_eq!(            hint,            Some("codex resume 123e4567-e89b-12d3-a456-426614174000".to_string())        );    }    #[test]    fn resume_hint_requires_thread_id() {        let hint = resume_hint(Some("my-thread"), /*thread_id*/ None);        assert_eq!(hint, None);    }}