@adguard/agtree/dist/ast-utils/clone.js

Tool set for working with adblock filter lists

/*
 * AGTree v4.1.1 (build date: Thu, 23 Apr 2026 09:15:37 GMT)
 * (c) 2026 Adguard Software Ltd.
 * Released under the MIT license
 * https://github.com/AdguardTeam/tsurlfilter/tree/master/packages/agtree#readme
 */
import { isNull } from '../utils/type-guards.js';

/**
 * @file Custom clone functions for AST nodes, this is probably the most efficient way to clone AST nodes.
 *
 * @todo Maybe move them to parser classes as 'clone' methods.
 */
/**
 * Clones a scriptlet rule node.
 *
 * @param node Node to clone.
 *
 * @returns Cloned node.
 */
function cloneScriptletRuleNode(node) {
    return {
        type: node.type,
        children: node.children.map((child) => (isNull(child) ? null : { ...child })),
    };
}
/**
 * Clones a domain list node.
 *
 * @param node Node to clone.
 *
 * @returns Cloned node.
 */
function cloneDomainListNode(node) {
    return {
        type: node.type,
        separator: node.separator,
        children: node.children.map((domain) => ({ ...domain })),
    };
}
/**
 * Clones a modifier list node.
 *
 * @param node Node to clone.
 *
 * @returns Cloned node.
 */
function cloneModifierListNode(node) {
    return {
        type: node.type,
        children: node.children.map((modifier) => {
            const res = {
                type: modifier.type,
                exception: modifier.exception,
                name: { ...modifier.name },
            };
            if (modifier.value) {
                res.value = { ...modifier.value };
            }
            return res;
        }),
    };
}

export { cloneDomainListNode, cloneModifierListNode, cloneScriptletRuleNode };