agentic-outer-dag-bin 0.1.0

External outer-DAG driver for worktree→PR→CodeRabbit loops
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use crate::state::StageKind;

pub fn is_terminal(kind: &StageKind) -> bool {
    match kind {
        StageKind::Init
        | StageKind::FreshnessBeforeTicketToPr
        | StageKind::DispatchingTicketToPr
        | StageKind::DetectingPr
        | StageKind::FreshnessBeforeCoderabbitWait
        | StageKind::WaitingForCoderabbit
        | StageKind::DispatchingResolvePrComments
        | StageKind::StoppedPermissionRequired
        | StageKind::StoppedQuestionRequired => false,
        StageKind::StoppedDirtyTree
        | StageKind::StoppedRebaseConflict
        | StageKind::StoppedManualHandoff
        | StageKind::StoppedReviewSkipped
        | StageKind::StoppedTimedOut
        | StageKind::StoppedReadyForHumanReview
        | StageKind::StoppedTicketToPrNoPrHandoff
        | StageKind::StoppedFailed => true,
    }
}

pub fn is_paused(kind: &StageKind) -> bool {
    match kind {
        StageKind::StoppedPermissionRequired | StageKind::StoppedQuestionRequired => true,
        StageKind::Init
        | StageKind::FreshnessBeforeTicketToPr
        | StageKind::DispatchingTicketToPr
        | StageKind::DetectingPr
        | StageKind::FreshnessBeforeCoderabbitWait
        | StageKind::WaitingForCoderabbit
        | StageKind::DispatchingResolvePrComments
        | StageKind::StoppedDirtyTree
        | StageKind::StoppedRebaseConflict
        | StageKind::StoppedManualHandoff
        | StageKind::StoppedReviewSkipped
        | StageKind::StoppedTimedOut
        | StageKind::StoppedReadyForHumanReview
        | StageKind::StoppedTicketToPrNoPrHandoff
        | StageKind::StoppedFailed => false,
    }
}

pub fn sequence_index(kind: &StageKind) -> Option<u8> {
    match kind {
        StageKind::Init => Some(0),
        StageKind::FreshnessBeforeTicketToPr => Some(1),
        StageKind::DispatchingTicketToPr => Some(2),
        StageKind::DetectingPr => Some(3),
        StageKind::FreshnessBeforeCoderabbitWait => Some(4),
        StageKind::WaitingForCoderabbit => Some(5),
        StageKind::DispatchingResolvePrComments => Some(6),
        StageKind::StoppedPermissionRequired
        | StageKind::StoppedQuestionRequired
        | StageKind::StoppedDirtyTree
        | StageKind::StoppedRebaseConflict
        | StageKind::StoppedManualHandoff
        | StageKind::StoppedReviewSkipped
        | StageKind::StoppedTimedOut
        | StageKind::StoppedReadyForHumanReview
        | StageKind::StoppedTicketToPrNoPrHandoff
        | StageKind::StoppedFailed => None,
    }
}

pub fn is_beyond_stop_after(current: &StageKind, stop_after: &StageKind) -> bool {
    match (sequence_index(current), sequence_index(stop_after)) {
        (Some(current), Some(stop_after)) => current > stop_after,
        _ => false,
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn classifies_terminal_states() {
        assert!(is_terminal(&StageKind::StoppedReadyForHumanReview));
        assert!(is_terminal(&StageKind::StoppedTicketToPrNoPrHandoff));
        assert!(is_terminal(&StageKind::StoppedManualHandoff));
        assert!(is_terminal(&StageKind::StoppedDirtyTree));
        assert!(is_terminal(&StageKind::StoppedRebaseConflict));
        assert!(!is_terminal(&StageKind::WaitingForCoderabbit));
    }

    #[test]
    fn classifies_paused_states() {
        assert!(is_paused(&StageKind::StoppedPermissionRequired));
        assert!(is_paused(&StageKind::StoppedQuestionRequired));
        assert!(!is_paused(&StageKind::StoppedTicketToPrNoPrHandoff));
        assert!(!is_paused(&StageKind::StoppedFailed));
    }

    #[test]
    fn sequence_index_orders_active_pipeline_stages() {
        assert_eq!(sequence_index(&StageKind::Init), Some(0));
        assert_eq!(
            sequence_index(&StageKind::FreshnessBeforeTicketToPr),
            Some(1)
        );
        assert_eq!(sequence_index(&StageKind::DispatchingTicketToPr), Some(2));
        assert_eq!(sequence_index(&StageKind::DetectingPr), Some(3));
        assert_eq!(
            sequence_index(&StageKind::FreshnessBeforeCoderabbitWait),
            Some(4)
        );
        assert_eq!(sequence_index(&StageKind::WaitingForCoderabbit), Some(5));
        assert_eq!(
            sequence_index(&StageKind::DispatchingResolvePrComments),
            Some(6)
        );
        assert_eq!(
            sequence_index(&StageKind::StoppedTicketToPrNoPrHandoff),
            None
        );
        assert_eq!(sequence_index(&StageKind::StoppedFailed), None);
    }

    #[test]
    fn identifies_when_current_stage_is_beyond_stop_after_ceiling() {
        assert!(is_beyond_stop_after(
            &StageKind::DispatchingResolvePrComments,
            &StageKind::WaitingForCoderabbit,
        ));
        assert!(!is_beyond_stop_after(
            &StageKind::WaitingForCoderabbit,
            &StageKind::WaitingForCoderabbit,
        ));
        assert!(!is_beyond_stop_after(
            &StageKind::DetectingPr,
            &StageKind::WaitingForCoderabbit,
        ));
        assert!(!is_beyond_stop_after(
            &StageKind::StoppedFailed,
            &StageKind::WaitingForCoderabbit,
        ));
    }
}