node-redis/lib/commands/ZUNION.ts

import { TransformArgumentsReply } from '.';
import { pushVerdictArgument, transformReplyStringArray } from './generic-transformers';

export const FIRST_KEY_INDEX = 2;

export const IS_READ_ONLY = true;

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

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

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

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

    return args;
}

export const transformReply = transformReplyStringArray;