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