simple datastore

app.js

var fs = require('fs');
var localStore  = require('./local-store');

var store = new localStore.Store({
  path: '/var/data',
  bucket: 'test'
});

var data = fs.readFileSync('/etc/passwd');

store.put('myfile', data, function(err) {
  if(err) return console.log(err);
  console.log('file stored');
});

store.get('myfile', function(err, data) {
  if(err) return console.log(err);
  console.log(data);
});

store.del('myfile', function(err) {
  if(err) return console.log(err);
  console.log('file deleted');
});

local-store.js

var fs      = require('fs');
var mkdirp  = require('mkdirp');
var crypto  = require('crypto');

function Store(options) {
  this.path = options.path;
  this.bucket = options.bucket;
}

Store.prototype._location = function(key) {
  var hash = crypto.createHash('sha1').update(key).digest('hex');

  var dirname = this.path + '/' + this.bucket + '/' + hash.slice(0, 2) + '/' + hash.slice(2, 4);
  var filename = hash;
  var fullpath = dirname + '/' + filename;

  return {
    dirname: dirname,
    filename: filename,
    fullpath: fullpath
  };
};

Store.prototype.put = function(key, data, callback) {
  var location = this._location(key);

  mkdirp(location.dirname, function(err) {
    if(err) return callback(err);
    fs.writeFile(location.fullpath, data, callback);
  });

};

Store.prototype.get = function(key, callback) {
  var location = this._location(key);
  fs.readFile(location.fullpath, callback);
};

Store.prototype.del = function(key, callback) {
  var location = this._location(key);
  fs.unlink(location.fullpath, callback);
  // TODO: remove directories if empty
};

module.exports.Store = Store;