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2023-06-28 11:40:55 -04:00

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TypeScript

import { Command, RedisArgument } from '../RESP/types';
export interface XReadStream {
key: RedisArgument;
id: RedisArgument;
}
export type XReadStreams = Array<XReadStream> | XReadStream;
export function pushXReadStreams(args: Array<RedisArgument>, streams: XReadStreams) {
args.push('STREAMS');
if (Array.isArray(streams)) {
const keysStart = args.length,
idsStart = keysStart + streams.length;
for (let i = 0; i < streams.length; i++) {
const stream = streams[i];
args[keysStart + i] = stream.key;
args[idsStart + i] = stream.id;
}
} else {
args.push(streams.key, streams.id);
}
}
export interface XReadOptions {
COUNT?: number;
BLOCK?: number;
}
export default {
FIRST_KEY_INDEX(streams: XReadStreams) {
return Array.isArray(streams) ? streams[0].key : streams.key;
},
IS_READ_ONLY: true,
transformArguments(streams: XReadStreams, options?: XReadOptions) {
const args: Array<RedisArgument> = ['XREAD'];
if (options?.COUNT) {
args.push('COUNT', options.COUNT.toString());
}
if (options?.BLOCK !== undefined) {
args.push('BLOCK', options.BLOCK.toString());
}
pushXReadStreams(args, streams);
return args;
},
// export { transformStreamsMessagesReply as transformReply } from './generic-transformers';
// TODO
transformReply: undefined as unknown as () => unknown
} as const satisfies Command;