Function apply_delete

atomic-core/src/crdt/apply/leaf.rs:224–250

Applies a Delete operation to mark a token as deleted. # Behavior 1. Verifies the leaf exists 2. Verifies the leaf is not already deleted 3. Updates the leaf's state to Deleted Note: The leaf entry remains in the database (tombstone). # Errors - `LeafNotFound` - The leaf doesn't exist - `InvalidLeafState` - The leaf is already deleted

(
    txn: &mut T,
    context: &mut ApplyContext,
    leaf_id: LeafId,
)

/// - `LeafNotFound` - The leaf doesn't exist
/// - `InvalidLeafState` - The leaf is already deleted
fn apply_delete<T: MutCrdtTxnT>(
    txn: &mut T,
    context: &mut ApplyContext,
    leaf_id: LeafId,
) -> ApplyResult<()> {
    // Verify leaf exists
    let leaf = txn
        .get_leaf(leaf_id)
        .map_err(|e| storage_err(e, "getting leaf"))?
        .ok_or_else(|| ApplyError::leaf_not_found(leaf_id))?;

    // Check current state
    if leaf.state().is_deleted() {
        if context.options().allow_duplicate_ids() {
            context.record_skipped();
            return Ok(());
        }
        return Err(ApplyError::invalid_leaf_state(leaf_id, "deleted", "delete"));
    }

    // Update state to deleted
    txn.update_leaf_state(leaf_id, LeafState::Deleted)
        .map_err(|e| storage_err(e, "updating leaf state"))?;

    context.record_leaf_deleted();
    Ok(())
}

// Replace Operation