origin_storage_manager/app/storage.js

multi cloud's storage event manager

import work from 'webworkify-webpack';

import getSha256 from '../cores/getSha256';
import NotImplementedError from '../errors/notImplementedError';

class Storage {
  constructor(storageSDK, expiration, region) {
    this.storageSDK = storageSDK;
    this.expiration = expiration;
    this.region = region;
    this.assumeCall = 0;
  }

  upload(params, subscriber, cbAssume) {
    throw new NotImplementedError(this.upload.name);
  };

  downloadFile(fileName, path) {
    throw new NotImplementedError(this.downloadFile.name);
  };

  abortUpload(params, subscriber, cbAssume) {
    throw new NotImplementedError(this.abortUpload.name);
  };

  workHashWorker(file, uploader, stateUpdateFn) {
    const worker = new work(require.resolve('../cores/getSha256Worker'));

    worker.onmessage = (e) => {
      try {
        uploader.postMessage(e.data);
      } catch (e) {
        stateUpdateFn();
      }
    };

    worker.postMessage(file);
  };

  calculateFileMD5AndUpload(file, uploader, subscriber) {
    if (window.Worker) {
      this.workHashWorker(file, uploader, () => {
        subscriber.publish('onError');
      });
    } else {
      getSha256(file, uploader);
    }
  };

  resetAssumeRole(cbAssume, cb) {
    if (this.assumeCall < 3) {
      this.assumeCall++;

      cbAssume((data) => {
        this.storageSDK = this.makeCredentials(data);

        cb();
      });
    } else {
      this.assumeCall = 0;
    }
  };

  makeCredentials(data) {
    throw new NotImplementedError(this.makeCredentials.name);
  };
}

export default Storage;