reifydb-transaction 0.4.11

Transaction management and concurrency control for ReifyDB
Documentation 
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// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2025 ReifyDB

use reifydb_core::interface::catalog::{
	change::CatalogTrackNamespaceChangeOperations, id::NamespaceId, namespace::Namespace,
};
use reifydb_type::Result;

use crate::{
	change::{
		Change,
		OperationType::{Create, Delete, Update},
		TransactionalNamespaceChanges,
	},
	transaction::admin::AdminTransaction,
};

impl CatalogTrackNamespaceChangeOperations for AdminTransaction {
	fn track_namespace_created(&mut self, namespace: Namespace) -> Result<()> {
		let change = Change {
			pre: None,
			post: Some(namespace),
			op: Create,
		};
		self.changes.add_namespace_change(change);
		Ok(())
	}

	fn track_namespace_updated(&mut self, pre: Namespace, post: Namespace) -> Result<()> {
		let change = Change {
			pre: Some(pre),
			post: Some(post),
			op: Update,
		};
		self.changes.add_namespace_change(change);
		Ok(())
	}

	fn track_namespace_deleted(&mut self, namespace: Namespace) -> Result<()> {
		let change = Change {
			pre: Some(namespace),
			post: None,
			op: Delete,
		};
		self.changes.add_namespace_change(change);
		Ok(())
	}
}

impl TransactionalNamespaceChanges for AdminTransaction {
	fn find_namespace(&self, id: NamespaceId) -> Option<&Namespace> {
		for change in self.changes.namespace.iter().rev() {
			if let Some(namespace) = &change.post {
				if namespace.id() == id {
					return Some(namespace);
				}
			} else if let Some(namespace) = &change.pre
				&& namespace.id() == id && change.op == Delete
			{
				return None;
			}
		}
		None
	}

	fn find_namespace_by_name(&self, name: &str) -> Option<&Namespace> {
		self.changes.namespace.iter().rev().find_map(|change| change.post.as_ref().filter(|s| s.name() == name))
	}

	fn is_namespace_deleted(&self, id: NamespaceId) -> bool {
		self.changes
			.namespace
			.iter()
			.rev()
			.any(|change| change.op == Delete && change.pre.as_ref().map(|s| s.id()) == Some(id))
	}

	fn is_namespace_deleted_by_name(&self, name: &str) -> bool {
		self.changes
			.namespace
			.iter()
			.rev()
			.any(|change| change.op == Delete && change.pre.as_ref().map(|s| s.name()) == Some(name))
	}
}