@adguard/agtree/dist/serializer/cosmetic/body/scriptlet-body-serializer.js

Tool set for working with adblock filter lists

/*
 * AGTree v3.2.2 (build date: Tue, 08 Jul 2025 13:39:47 GMT)
 * (c) 2025 Adguard Software Ltd.
 * Released under the MIT license
 * https://github.com/AdguardTeam/tsurlfilter/tree/master/packages/agtree#readme
 */
import { UINT8_MAX, NULL } from '../../../utils/constants.js';
import { ParameterListSerializer } from '../../misc/parameter-list-serializer.js';
import { isUndefined } from '../../../utils/type-guards.js';
import { BaseSerializer } from '../../base-serializer.js';
import { AbpSnippetBodyMarshallingMap } from '../../../marshalling-utils/cosmetic/body/abp-snippet-injection-body-common.js';
import { BinaryTypeMarshallingMap } from '../../../marshalling-utils/misc/binary-type-common.js';

/**
 * Serializer for scriptlet injection rule body nodes.
 */
class ScriptletBodySerializer extends BaseSerializer {
    /**
     * Serializes a scriptlet injection rule body node into a compact binary format.
     *
     * @param node The ScriptletInjectionRuleBody node to serialize.
     * @param buffer The OutputByteBuffer used for writing the binary data.
     * @param frequentScriptletArgs An optional map of frequently used scriptlet names and their arguments,
     * along with their corresponding serialization index.
     */
    static serialize = (node, buffer, frequentScriptletArgs) => {
        buffer.writeUint8(BinaryTypeMarshallingMap.ScriptletInjectionRuleBodyNode);
        const { length } = node.children;
        buffer.writeUint8(AbpSnippetBodyMarshallingMap.Children);
        // note: we store the count, because re-construction of the array is faster if we know the length
        if (length > UINT8_MAX) {
            throw new Error(`Too many scriptlet children: ${length}, the limit is ${UINT8_MAX}`);
        }
        buffer.writeUint8(length);
        for (let i = 0; i < length; i += 1) {
            ParameterListSerializer.serialize(node.children[i], buffer, frequentScriptletArgs);
        }
        if (!isUndefined(node.start)) {
            buffer.writeUint8(AbpSnippetBodyMarshallingMap.Start);
            buffer.writeUint32(node.start);
        }
        if (!isUndefined(node.end)) {
            buffer.writeUint8(AbpSnippetBodyMarshallingMap.End);
            buffer.writeUint32(node.end);
        }
        buffer.writeUint8(NULL);
    };
}

export { ScriptletBodySerializer };