Function apply_undelete

atomic-core/src/crdt/apply/trunk.rs:258–286

Applies an Undelete operation to restore a deleted file. # Behavior 1. Verifies the trunk exists 2. Verifies the trunk is currently deleted 3. Updates the trunk's state to Alive # Errors - `TrunkNotFound` - The trunk doesn't exist - `InvalidTrunkState` - The trunk is not deleted

(
    txn: &mut T,
    context: &mut ApplyContext,
    trunk_id: TrunkId,
)

/// - `TrunkNotFound` - The trunk doesn't exist
/// - `InvalidTrunkState` - The trunk is not deleted
fn apply_undelete<T: MutCrdtTxnT>(
    txn: &mut T,
    context: &mut ApplyContext,
    trunk_id: TrunkId,
) -> ApplyResult<()> {
    // Verify trunk exists
    let trunk = txn
        .get_trunk(trunk_id)
        .map_err(|e| storage_err(e, "getting trunk"))?
        .ok_or_else(|| ApplyError::trunk_not_found(trunk_id))?;

    // Check current state
    if !trunk.state().is_deleted() {
        if context.options().allow_duplicate_ids() {
            context.record_skipped();
            return Ok(());
        }
        return Err(ApplyError::invalid_trunk_state(
            trunk_id, "alive", "undelete",
        ));
    }

    // Update state to alive
    txn.update_trunk_state(trunk_id, TrunkState::Alive)
        .map_err(|e| storage_err(e, "updating trunk state"))?;

    context.record_trunk_undeleted();
    Ok(())
}

// Validation Helpers