smc-hub/dist/filesystem-bucket.js

CoCalc: Backend webserver component

// Generated by CoffeeScript 2.5.1
(function() {
  //########################################################################
  // This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
  // License: AGPLv3 s.t. "Commons Clause" – see LICENSE.md for details
  //########################################################################
  /*
  Filesystem based bucket -- same api as gcloud bucket.

  Motivation: in KuCalc we use gcsfuse to just mount the smc-blobs bucket
  defined in smc-gcloud.
  */
  var FilesystemBucket, defaults, fs, misc, required;

  fs = require('fs');

  ({defaults} = misc = require('smc-util/misc'));

  required = defaults.required;

  exports.filesystem_bucket = function(opts) {
    opts = defaults(opts, {
      name: required
    });
    if (!opts.name) {
      throw Error("bucket name must be specified");
    }
    return new FilesystemBucket(opts.name);
  };

  FilesystemBucket = class FilesystemBucket {
    constructor(path) {
      this.blob_path = this.blob_path.bind(this);
      this.write = this.write.bind(this);
      this.read = this.read.bind(this);
      this.delete = this.delete.bind(this);
      this.path = path;
    }

    blob_path(name) {
      return `${this.path}/${name}`;
    }

    write(opts) {
      opts = defaults(opts, {
        name: required,
        content: required,
        cb: required
      });
      return fs.writeFile(this.blob_path(opts.name), opts.content, opts.cb);
    }

    read(opts) {
      opts = defaults(opts, {
        name: required,
        cb: required
      });
      return fs.readFile(this.blob_path(opts.name), opts.cb);
    }

    delete(opts) {
      opts = defaults(opts, {
        name: required,
        cb: void 0
      });
      return fs.unlink(this.blob_path(opts.name), function(err) {
        return typeof opts.cb === "function" ? opts.cb(err) : void 0;
      });
    }

  };

}).call(this);

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