@silverwind/ioredis-mock/lib/commands/xadd.js

This library emulates ioredis by performing all operations in-memory.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.xadd = xadd;

function xadd(stream, id, ...args) {
  if (!stream || !id || args.length === 0 || args.length % 2 !== 0) {
    throw new Error("ERR wrong number of arguments for 'xadd' command");
  }

  if (!this.data.has(stream)) {
    this.data.set(stream, []);
  }

  const eventId = `${id === '*' ? this.data.get(stream).length + 1 : id}-0`;
  const list = this.data.get(stream);

  if (list.length > 0 && list[0][0] === `${eventId}`) {
    throw new Error('ERR The ID specified in XADD is equal or smaller than the target stream top item');
  }

  this.data.set(`stream:${stream}:${eventId}`, {
    polled: false
  });
  this.data.set(stream, list.concat([[`${eventId}`, [...args]]]));
  return `${eventId}`;
}