datainout/dist/common/core/RingPromise.js

Import and reports data

var __async = (__this, __arguments, generator) => {
  return new Promise((resolve, reject) => {
    var fulfilled = (value) => {
      try {
        step(generator.next(value));
      } catch (e) {
        reject(e);
      }
    };
    var rejected = (value) => {
      try {
        step(generator.throw(value));
      } catch (e) {
        reject(e);
      }
    };
    var step = (x) => x.done ? resolve(x.value) : Promise.resolve(x.value).then(fulfilled, rejected);
    step((generator = generator.apply(__this, __arguments)).next());
  });
};

// src/common/core/RingPromise.ts
import { Writable } from "stream";
var RingPromise = class {
  constructor(ringSize, task) {
    this.ring = [];
    this.index = 0;
    this.ring = new Array(ringSize).fill(Promise.resolve());
    this.task = task;
  }
  run(...arg) {
    return __async(this, null, function* () {
      this.index = (this.index + 1) % this.ring.length;
      this.ring[this.index] = this.task(...arg);
      if (this.index === this.ring.length - 1) yield Promise.all(this.ring);
    });
  }
  stream() {
    const that = this;
    return new Writable({
      objectMode: true,
      write(arg, _encoding, callback) {
        return __async(this, null, function* () {
          try {
            yield that.run(...arg);
          } catch (err) {
            return callback(err);
          }
          callback();
        });
      },
      final(callback) {
        Promise.all(that.ring).then(() => callback()).catch((err) => callback(err));
      }
    });
  }
};
export {
  RingPromise
};