node-redis/packages/client/lib/commands/ZUNIONSTORE.ts

import { RedisCommandArguments } from '.';
import { pushVerdictArgument } from './generic-transformers';

export const FIRST_KEY_INDEX = 1;

interface ZUnionOptions {
    WEIGHTS?: Array<number>;
    AGGREGATE?: 'SUM' | 'MIN' | 'MAX';
}

export function transformArguments(destination: string, keys: Array<string> | string, options?: ZUnionOptions): RedisCommandArguments {
    const args = pushVerdictArgument(['ZUNIONSTORE', destination], keys);

    if (options?.WEIGHTS) {
        args.push('WEIGHTS', ...options.WEIGHTS.map(weight => weight.toString()));
    }

    if (options?.AGGREGATE) {
        args.push('AGGREGATE', options.AGGREGATE);
    }

    return args;
}

export declare function transformReply(): number;